NOAA Current Watches-WA

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-28T14:49:00-08:00 2024-11-28T14:49:00-08:00 2024-11-28T14:49:00-08:00 2024-11-29T06:00:00-08:00 Actual Update Met Expected Moderate Likely West Hills and Chehalem Mountains; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041067 SAME 041051 SAME 041071 SAME 041005 SAME 053011 UGC ORZ110 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 282249 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241203T0000Z/ eventEndingTime 2024-12-03T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.6cb7a31bb4f5d5534fb91a98d0c7a8ea3b1b1df8.005.1,2024-11-28T02:47:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.6cb7a31bb4f5d5534fb91a98d0c7a8ea3b1b1df8.003.1,2024-11-28T02:47:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.d569cdb484c1d336d7f6b4a304e870456bb81e5e.004.1,2024-11-27T23:06:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.d569cdb484c1d336d7f6b4a304e870456bb81e5e.002.1,2024-11-27T23:06:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.96deae15aa4df7130d51bb4d78fc4ae640c25d6b.004.1,2024-11-27T22:57:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.96deae15aa4df7130d51bb4d78fc4ae640c25d6b.002.2,2024-11-27T22:57:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.2e43107565bb75e40151c4e5a51b4e379352916c.003.1,2024-11-27T20:37:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.003.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.3e384f61e5e30bc09e3bf73f0378b067870211cd.002.1,2024-11-27T12:22:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.004.1,2024-11-27T10:55:00-08:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Central and Southern Willamette Valley, Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, North Clark County Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-28T14:49:00-08:00 2024-11-28T14:49:00-08:00 2024-11-28T14:49:00-08:00 2024-11-29T06:00:00-08:00 Actual Update Met Expected Moderate Likely North Oregon Coast Range Lowlands; Central Oregon Coast Range Lowlands; Lower Columbia River; Tualatin Valley; West Central Willamette Valley; East Central Willamette Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; Willapa and Wahkiakum Lowlands; Cowlitz County Lowlands; North Clark County Lowlands; South Washington Cascade Foothills SAME 041057 SAME 041007 SAME 041041 SAME 041067 SAME 041071 SAME 041039 SAME 041003 SAME 041053 SAME 041009 SAME 041051 SAME 041005 SAME 041047 SAME 041043 SAME 053049 SAME 053069 SAME 053015 SAME 053011 SAME 053059 UGC ORZ104 UGC ORZ105 UGC ORZ108 UGC ORZ109 UGC ORZ114 UGC ORZ115 UGC ORZ116 UGC ORZ117 UGC ORZ118 UGC ORZ123 UGC ORZ124 UGC ORZ125 UGC WAZ202 UGC WAZ204 UGC WAZ205 UGC WAZ208 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 282249 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.6cb7a31bb4f5d5534fb91a98d0c7a8ea3b1b1df8.004.1,2024-11-28T02:47:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.6cb7a31bb4f5d5534fb91a98d0c7a8ea3b1b1df8.002.1,2024-11-28T02:47:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.6cb7a31bb4f5d5534fb91a98d0c7a8ea3b1b1df8.001.2,2024-11-28T02:47:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.6cb7a31bb4f5d5534fb91a98d0c7a8ea3b1b1df8.006.1,2024-11-28T02:47:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.d569cdb484c1d336d7f6b4a304e870456bb81e5e.005.1,2024-11-27T23:06:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.d569cdb484c1d336d7f6b4a304e870456bb81e5e.003.1,2024-11-27T23:06:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.d569cdb484c1d336d7f6b4a304e870456bb81e5e.001.1,2024-11-27T23:06:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.96deae15aa4df7130d51bb4d78fc4ae640c25d6b.005.1,2024-11-27T22:57:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.96deae15aa4df7130d51bb4d78fc4ae640c25d6b.003.2,2024-11-27T22:57:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.96deae15aa4df7130d51bb4d78fc4ae640c25d6b.001.2,2024-11-27T22:57:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.2e43107565bb75e40151c4e5a51b4e379352916c.002.1,2024-11-27T20:37:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.2e43107565bb75e40151c4e5a51b4e379352916c.001.2,2024-11-27T20:37:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.002.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.001.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.3e384f61e5e30bc09e3bf73f0378b067870211cd.001.1,2024-11-27T12:22:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.001.2,2024-11-27T10:55:00-08:00

* WHAT...Visibility less than one mile in freezing fog. * WHERE...Lower Columbia Basin of Oregon and Washington, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...Until noon PST today. * IMPACTS...Low visibility could make driving conditions hazardous. Freezing Fog Advisory 2024-11-28T09:32:00-08:00 2024-11-28T09:32:00-08:00 2024-11-28T09:32:00-08:00 2024-11-28T12:00:00-08:00 Actual Update Met Expected Moderate Likely Lower Columbia Basin of Oregon; Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington SAME 041049 SAME 041059 SAME 053077 SAME 053005 SAME 053021 SAME 053039 SAME 053071 SAME 053013 UGC ORZ044 UGC WAZ027 UGC WAZ028 UGC WAZ029 AWIPSidentifier NPWPDT WMOidentifier WWUS76 KPDT 281732 NWSheadline FREEZING FOG ADVISORY NOW IN EFFECT UNTIL NOON PST TODAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.EXT.KPDT.ZF.Y.0008.000000T0000Z-241128T2000Z/ eventEndingTime 2024-11-28T20:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.170f4aba40d810e82b48d21f71c619b662e9576a.002.1,2024-11-27T21:49:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.170f4aba40d810e82b48d21f71c619b662e9576a.001.1,2024-11-27T21:49:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.9eba1208cb9e17b4e6fdf5d2fbea99da3eb3c816.002.1,2024-11-27T19:01:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.9eba1208cb9e17b4e6fdf5d2fbea99da3eb3c816.001.1,2024-11-27T19:01:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.9fc0f7addddd227ce06fbf166ac66fe2b3519eda.001.1,2024-11-27T16:36:00-08:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-28T08:22:00-08:00 2024-11-28T08:22:00-08:00 2024-11-28T08:22:00-08:00 2024-11-28T20:30:00-08:00 Actual Update Met Expected Moderate Likely Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041051 SAME 041005 SAME 053011 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281622 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241203T0000Z/ eventEndingTime 2024-12-03T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.2e43107565bb75e40151c4e5a51b4e379352916c.003.1,2024-11-27T20:37:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.003.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.3e384f61e5e30bc09e3bf73f0378b067870211cd.002.1,2024-11-27T12:22:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.004.1,2024-11-27T10:55:00-08:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Lower Columbia River and Cowlitz River Valleys, North Oregon Coast Range Lowlands, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-28T08:22:00-08:00 2024-11-28T08:22:00-08:00 2024-11-28T08:22:00-08:00 2024-11-28T20:30:00-08:00 Actual Update Met Expected Moderate Likely North Oregon Coast Range Lowlands; Lower Columbia River; Tualatin Valley; Willapa and Wahkiakum Lowlands; Cowlitz County Lowlands; North Clark County Lowlands SAME 041057 SAME 041007 SAME 041041 SAME 041067 SAME 041071 SAME 041009 SAME 041051 SAME 041005 SAME 053049 SAME 053069 SAME 053015 SAME 053011 UGC ORZ104 UGC ORZ108 UGC ORZ109 UGC WAZ202 UGC WAZ204 UGC WAZ205 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281622 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.2e43107565bb75e40151c4e5a51b4e379352916c.002.1,2024-11-27T20:37:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.002.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.3e384f61e5e30bc09e3bf73f0378b067870211cd.001.1,2024-11-27T12:22:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, Foothills of the Northern and Central Oregon Cascades, Central Oregon Coast Range Lowlands, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-28T08:22:00-08:00 2024-11-28T08:22:00-08:00 2024-11-28T08:22:00-08:00 2024-11-28T20:30:00-08:00 Actual Update Met Expected Moderate Likely Central Oregon Coast Range Lowlands; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; South Washington Cascade Foothills SAME 041039 SAME 041041 SAME 041003 SAME 041053 SAME 041043 SAME 041005 SAME 041047 SAME 053011 SAME 053015 SAME 053059 UGC ORZ105 UGC ORZ116 UGC ORZ117 UGC ORZ118 UGC ORZ123 UGC ORZ124 UGC ORZ125 UGC WAZ208 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281622 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.2e43107565bb75e40151c4e5a51b4e379352916c.002.1,2024-11-27T20:37:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.002.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.e687fb99ac77517c94d13096528e22603fa46c74.001.1,2024-11-27T16:50:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.3e384f61e5e30bc09e3bf73f0378b067870211cd.001.1,2024-11-27T12:22:00-08:00 w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Lower Columbia Basin of Oregon and Washington, Yakima Valley, and Foothills of the Blue Mountains of Washington. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Freezing Fog Advisory 2024-11-28T05:27:00-08:00 2024-11-28T05:27:00-08:00 2024-11-28T05:27:00-08:00 2024-11-28T10:00:00-08:00 Actual Update Met Expected Moderate Likely Lower Columbia Basin of Oregon; Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington SAME 041049 SAME 041059 SAME 053077 SAME 053005 SAME 053021 SAME 053039 SAME 053071 SAME 053013 UGC ORZ044 UGC WAZ027 UGC WAZ028 UGC WAZ029 AWIPSidentifier NPWPDT WMOidentifier WWUS76 KPDT 281327 NWSheadline FREEZING FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPDT.ZF.Y.0008.000000T0000Z-241128T1800Z/ eventEndingTime 2024-11-28T18:00:00+00:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For the Dense Fog Advisory, until 11 AM PST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Dense Fog Advisory 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T11:30:00-08:00 Actual Update Met Expected Moderate Likely Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041051 SAME 041005 SAME 053011 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281047 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THIS MORNING BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.FG.Y.0036.000000T0000Z-241128T1900Z/ eventEndingTime 2024-11-28T19:00:00+00:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Lower Columbia River and Cowlitz River Valleys, North Oregon Coast Range Lowlands, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Dense Fog Advisory 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T11:30:00-08:00 Actual Update Met Expected Moderate Likely North Oregon Coast Range Lowlands; Lower Columbia River; Tualatin Valley; Willapa and Wahkiakum Lowlands; Cowlitz County Lowlands; North Clark County Lowlands SAME 041057 SAME 041007 SAME 041041 SAME 041067 SAME 041071 SAME 041009 SAME 041051 SAME 041005 SAME 053049 SAME 053069 SAME 053015 SAME 053011 UGC ORZ104 UGC ORZ108 UGC ORZ109 UGC WAZ202 UGC WAZ204 UGC WAZ205 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281047 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THIS MORNING BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.FG.Y.0036.000000T0000Z-241128T1900Z/ eventEndingTime 2024-11-28T19:00:00+00:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For the Dense Fog Advisory, until 11 AM PST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Air Stagnation Advisory 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T11:30:00-08:00 Actual Update Met Expected Moderate Likely Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041051 SAME 041005 SAME 053011 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281047 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THIS MORNING BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241203T0000Z/ eventEndingTime 2024-12-03T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.004.1,2024-11-27T10:55:00-08:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Lower Columbia River and Cowlitz River Valleys, North Oregon Coast Range Lowlands, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST this morning. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Air Stagnation Advisory 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T11:30:00-08:00 Actual Update Met Expected Moderate Likely North Oregon Coast Range Lowlands; Lower Columbia River; Tualatin Valley; Willapa and Wahkiakum Lowlands; Cowlitz County Lowlands; North Clark County Lowlands SAME 041057 SAME 041007 SAME 041041 SAME 041067 SAME 041071 SAME 041009 SAME 041051 SAME 041005 SAME 053049 SAME 053069 SAME 053015 SAME 053011 UGC ORZ104 UGC ORZ108 UGC ORZ109 UGC WAZ202 UGC WAZ204 UGC WAZ205 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281047 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THIS MORNING BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T02:47:00-08:00 2024-11-28T11:30:00-08:00 Actual Update Met Expected Moderate Likely Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; South Washington Cascade Foothills SAME 041005 SAME 041047 SAME 041043 SAME 041039 SAME 053011 SAME 053015 SAME 053059 UGC ORZ123 UGC ORZ124 UGC ORZ125 UGC WAZ208 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 281047 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00

* WHAT...Visibility around one-quarter mile or less in dense fog. * WHERE...Hood Canal Area, Bremerton and Vicinity, Seattle and Vicinity, Southwest Interior, and Tacoma Area. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Dense Fog Advisory 2024-11-28T01:19:00-08:00 2024-11-28T01:19:00-08:00 2024-11-28T01:19:00-08:00 2024-11-28T10:00:00-08:00 Actual Alert Met Expected Moderate Likely Southwest Interior; Tacoma Area; Hood Canal Area; Seattle and Vicinity; Bremerton and Vicinity SAME 053041 SAME 053067 SAME 053053 SAME 053031 SAME 053035 SAME 053045 SAME 053033 UGC WAZ504 UGC WAZ509 UGC WAZ511 UGC WAZ558 UGC WAZ559 AWIPSidentifier NPWSEW WMOidentifier WWUS76 KSEW 280919 NWSheadline DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.NEW.KSEW.FG.Y.0001.241128T0919Z-241128T1800Z/ eventEndingTime 2024-11-28T18:00:00+00:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley. Dense Fog Advisory 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-28T11:15:00-08:00 Actual Update Met Expected Moderate Likely Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041051 SAME 041005 SAME 053011 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 280706 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THURSDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.FG.Y.0036.000000T0000Z-241128T1900Z/ eventEndingTime 2024-11-28T19:00:00+00:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley. Dense Fog Advisory 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-28T11:15:00-08:00 Actual Update Met Expected Moderate Likely North Oregon Coast Range Lowlands; Central Oregon Coast Range Lowlands; Lower Columbia River; Tualatin Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; Willapa and Wahkiakum Lowlands; Cowlitz County Lowlands; North Clark County Lowlands SAME 041057 SAME 041007 SAME 041041 SAME 041067 SAME 041071 SAME 041039 SAME 041003 SAME 041053 SAME 041009 SAME 041051 SAME 041005 SAME 041043 SAME 053049 SAME 053069 SAME 053015 SAME 053011 UGC ORZ104 UGC ORZ105 UGC ORZ108 UGC ORZ109 UGC ORZ116 UGC ORZ117 UGC ORZ118 UGC WAZ202 UGC WAZ204 UGC WAZ205 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 280706 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THURSDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.FG.Y.0036.000000T0000Z-241128T1900Z/ eventEndingTime 2024-11-28T19:00:00+00:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Monday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley. Air Stagnation Advisory 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-28T11:15:00-08:00 Actual Update Met Expected Moderate Likely Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041051 SAME 041005 SAME 053011 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 280706 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THURSDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241203T0000Z/ eventEndingTime 2024-12-03T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.004.1,2024-11-27T10:55:00-08:00

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog, and freezing fog in spots across rural areas. or the Air Stagnation Advisory, a persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...South Willamette Valley, North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Tualatin Valley, Willapa and Wahkiakum Lowlands, and North Clark County Lowlands. * WHEN...For the Air Stagnation Advisory, until 4 PM PST Tuesday. For the Dense Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. Watch fog spotty freezing fog and slick roads, especially rural areas of the Willamette Valley. Air Stagnation Advisory 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-28T11:15:00-08:00 Actual Update Met Expected Moderate Likely North Oregon Coast Range Lowlands; Central Oregon Coast Range Lowlands; Lower Columbia River; Tualatin Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; Willapa and Wahkiakum Lowlands; Cowlitz County Lowlands; North Clark County Lowlands SAME 041057 SAME 041007 SAME 041041 SAME 041067 SAME 041071 SAME 041039 SAME 041003 SAME 041053 SAME 041009 SAME 041051 SAME 041005 SAME 041043 SAME 053049 SAME 053069 SAME 053015 SAME 053011 UGC ORZ104 UGC ORZ105 UGC ORZ108 UGC ORZ109 UGC ORZ116 UGC ORZ117 UGC ORZ118 UGC WAZ202 UGC WAZ204 UGC WAZ205 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 280706 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY... ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM PST THURSDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Foothills of the Northern and Central Oregon Cascades, and South Washington Cascade Foothills. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-27T23:06:00-08:00 2024-11-28T11:15:00-08:00 Actual Update Met Expected Moderate Likely Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; South Washington Cascade Foothills SAME 041005 SAME 041047 SAME 041043 SAME 041039 SAME 053011 SAME 053015 SAME 053059 UGC ORZ123 UGC ORZ124 UGC ORZ125 UGC WAZ208 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 280706 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241204T0000Z/ eventEndingTime 2024-12-04T00:00:00+00:00 expiredReferences w-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.7da93e300caaa1066d3cf61e9144c4b03b63b156.003.1,2024-11-27T10:55:00-08:00

* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Yakima Valley, Lower Columbia Basin of Washington, and Foothills of the Blue Mountains of Washington. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. Freezing Fog Advisory 2024-11-27T21:49:00-08:00 2024-11-27T21:49:00-08:00 2024-11-27T21:49:00-08:00 2024-11-28T07:00:00-08:00 Actual Update Met Expected Moderate Likely Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington SAME 053077 SAME 053005 SAME 053021 SAME 053039 SAME 053071 SAME 053013 UGC WAZ027 UGC WAZ028 UGC WAZ029 AWIPSidentifier NPWPDT WMOidentifier WWUS76 KPDT 280549 NWSheadline FREEZING FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THURSDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPDT.ZF.Y.0008.000000T0000Z-241128T1800Z/ eventEndingTime 2024-11-28T18:00:00+00:00

* WHAT...A persistent inversion with light and variable winds will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants near the surface over time. * WHERE...Eastern Portland/Vancouver Metro, Portland West Hills and Chehalem Mountain, Inner Portland Metro, and Inner Vancouver Metro. * WHEN...Until 4 PM PST Monday. * IMPACTS...Deteriorating air quality may cause issues for people with respiratory problems. Air Stagnation Advisory 2024-11-27T20:37:00-08:00 2024-11-27T20:37:00-08:00 2024-11-27T20:37:00-08:00 2024-11-28T04:00:00-08:00 Actual Update Met Expected Moderate Likely West Hills and Chehalem Mountains; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; Inner Vancouver Metro; East Clark County Lowlands SAME 041067 SAME 041051 SAME 041071 SAME 041005 SAME 053011 UGC ORZ110 UGC ORZ111 UGC ORZ112 UGC ORZ113 UGC WAZ206 UGC WAZ207 AWIPSidentifier NPWPQR WMOidentifier WWUS76 KPQR 280437 NWSheadline AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY BLOCKCHANNEL EAS BLOCKCHANNEL NWEM BLOCKCHANNEL CMAS VTEC /O.CON.KPQR.AS.Y.0001.000000T0000Z-241203T0000Z/ eventEndingTime 2024-12-03T00:00:00+00:00