Alert archive / Idaho / Winter Storm Warnings in 2009
Winter Storm Warning 22, NWS Spokane, WA
NWS Spokane, WA issued this winter storm warning at Mar 9, 2009, 6:12 PM PDT for 4 counties in Idaho; Spokane County, Whitman County, Washington. It was in force for 17 hr. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 9, 2009, 6:12 PM PDT (01:12 UTC)
- Expired
- Mar 10, 2009, 11:00 AM PDT
- In force
- 17 hr
- Issued by
- NWS Spokane, WA
Counties Benewah County, ID, Kootenai County, ID, Latah County, ID, Shoshone County, ID, Spokane County, WA, Whitman County, WA
The radar
The Spokane radar (KOTX), 77 km from the middle of the area, began a volume at 01:11 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 9, 6:30 PM PDT | HEAVY SNOW 4 | 2 Ne Coeur D'Alene, ID | KOOTENAI 72H - ELEVATION 2300 FT |
| Mar 9, 6:30 PM PDT | HEAVY SNOW 4.5 | 3 Nw Spokane, WA | |
| Mar 9, 7:00 PM PDT | HEAVY SNOW 4.2 | 4 N Coeur D'Alene, ID | KOOTENAI 76 - ELEVATION 2290 FEET |
| Mar 9, 7:45 PM PDT | HEAVY SNOW 5 | 6 Sse St. John, WA | WHITMAN 70 - ELEVATION 2230 FT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.2 hours before the alert went out and 58 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 3 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 569 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS46 KOTX 100112 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 612 PM PDT MON MAR 9 2009 ...MORE LATE SEASON SNOW FOR THE VALLEYS OF THE IDAHO PANHANDLE AND FOR THE LOWLANDS OF FAR EASTERN WASHINGTON... .A STRONG ARCTIC COLD FRONT WILL MOVE THROUGH WASHINGTON AND NORTHERN IDAHO TONIGHT. THIS FRONT WILL COLLIDE WITH A VERY UNSTABLE AIRMASS AND PRODUCE WIDESPREAD SNOW SHOWERS. THE MOST SIGNIFICANT ACCUMULATIONS ARE EXPECTED TO OCCUR OVER THE IDAHO PANHANDLE AND ADJACENT PORTIONS OF EASTERN WASHINGTON. IDZ002-003-WAZ033-100915- /O.UPG.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ /O.NEW.KOTX.WS.W.0022.090310T0112Z-090310T1200Z/ COEUR DALENE AREA-IDAHO PALOUSE-WASHINGTON PALOUSE- INCLUDING THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS... HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN 612 PM PDT MON MAR 9 2009 ...WINTER STORM WARNING IN EFFECT UNTIL 5 AM PDT TUESDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 5 AM PDT TUESDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. HEAVY SNOW SHOWERS WILL PERSIST ON AND OFF THROUGH THE NIGHT WITH LOCALLY HEAVY SNOW SHOWERS EXPECTED. DUE TO SHOWERY NATURE A WIDE RANGE OF ACCUMULATIONS IS EXPECTED. STORM TOTAL SNOW ACCUMULATIONS OF 4 TO 7 INCHES WILL OCCUR...WITH LOCAL AMOUNTS AS HIGH AS 9 INCHES SINCE MONDAY MORNING. SNOW SHOWERS WILL BE HEAVY AT TIMES LEADING TO LOW VISIBILITIES OF LESS THAN ONE QUARTER OF A MILE AND ACCUMULATION RATES IN EXCESS OF AN INCH PER HOUR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS...HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN. $$ IDZ004-100915- /O.UPG.KOTX.WW.Y.0026.090310T0300Z-090310T1500Z/ /O.NEW.KOTX.WS.W.0022.090310T0112Z-090310T1800Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS 612 PM PDT MON MAR 9 2009 ...WINTER STORM WARNING IN EFFECT UNTIL 11 AM PDT TUESDAY... THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 11 AM PDT TUESDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. HEAVY SNOW SHOWERS WILL INCREASE THROUGH THE EVENING AND PERSIST INTO EARLY TUESDAY MORNING. DUE TO THE SHOWERY NATURE A WIDE RANGE OF ACCUMULATIONS IS EXPECTED. SNOW ACCUMULATIONS OF 4 TO 8 INCHES ARE LIKELY TONIGHT INTO EARLY TUESDAY MORNING...BUT WITH LOCALLY HIGHER AMOUNTS POSSIBLE. FOR THE NEARBY MOUNTAINS...6 TO 10 INCHES ARE EXPECTED BY SUNRISE TUESDAY. THE HIGHEST ACCUMULATIONS ARE EXPECTED IN THE I-90 CORRIDOR WHERE SNOWFALL RATES MAY EXCEED AN INCH PER HOUR AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS. $$ IDZ001-100915- /O.EXT.KOTX.WW.Y.0026.090310T0112Z-090310T1200Z/ NORTHERN PANHANDLE- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD 612 PM PDT MON MAR 9 2009 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM PDT TUESDAY... THE WINTER WEATHER ADVISORY FOR SNOW IS NOW IN EFFECT UNTIL 5 AM PDT TUESDAY. SNOW SHOWERS WILL INCREASE THROUGH THE EVENING AND PERSIST INTO EARLY TUESDAY MORNING. DUE TO THE SHOWERY NATURE A WIDE RANGE OF ACCUMULATIONS IS EXPECTED. SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE LIKELY TONIGHT INTO EARLY TUESDAY MORNING...BUT WITH LOCALLY HIGHER AMOUNTS POSSIBLE. FOR THE NEARBY MOUNTAINS...3 TO 6 INCHES ARE EXPECTED BY SUNRISE TUESDAY. THE HIGHEST VALLEY ACCUMULATIONS ARE LIKELY SOUTH OF SANDPOINT NEAR SPIRIT LAKE AND ATHOL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD. $$ WAZ036-037-100915- /O.CON.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ SPOKANE AREA-NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SPOKANE...CHENEY... DAVENPORT...ROCKFORD...COLVILLE...DEER PARK...CHEWELAH... NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD 612 PM PDT MON MAR 9 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT TUESDAY. SNOW SHOWERS WILL PERSIST THROUGH TONIGHT WITH LOCALLY HEAVY SHOWERS EXPECTED. THE SHOWERY NATURE WILL LEAD TO A WIDE RANGE OF SNOW ACCUMULATIONS. AN ADDITIONAL 1 TO 3 INCHES IS EXPECTED WITH LOCALLY HIGHER AMOUNTS. STORM TOTAL SNOW ACCUMULATIONS WILL RANGE FROM 3 TO 6 INCHES. THE HEAVIEST ADDITIONAL ACCUMULATIONS ARE LIKELY GENERALLY FROM CHENEY TO SOUTH SPOKANE AND POINTS SOUTH THROUGH THE NIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...SPOKANE...CHENEY... DAVENPORT...ROCKFORD...COLVILLE...DEER PARK...CHEWELAH... NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD...ORIN-RICE ROAD...FLOWERY TRAIL ROAD. $$ IDZ026-WAZ032-100915- /O.CON.KOTX.WW.Y.0026.090310T0300Z-090310T1500Z/ LEWISTON AREA-LOWER GARFIELD AND ASOTIN COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI...PECK... CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT 612 PM PDT MON MAR 9 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY. HEAVY SNOW SHOWERS WILL CONTINUE TO DEVELOP THIS EVENING. TOTAL OVERNIGHT SNOWFALL WILL BE 2 TO 4 INCHES NEAR POMEROY...AND 1 TO 3 INCHES IN THE LEWISTON AND CLARKSTON AREAS. IN THE HIGHER ELEVATIONS SUCH AS ALPOWA SUMMIT...ACCUMULATIONS OF 3 TO 7 INCHES ARE POSSIBLE OVERNIGHT. SNOWFALL RATES...ESPECIALLY IN GARFIELD COUNTY MAY EXCEED AN INCH PER HOUR AND THE HEAVIEST SNOW SHOWERS MAY BE ACCOMPANIED BY LIGHTNING AND THUNDER THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI... PECK...CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT. $$ IDZ027-100915- /O.CON.KOTX.WW.Y.0026.090310T0300Z-090310T1500Z/ LEWIS AND SOUTHERN NEZ PERCE COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD 612 PM PDT MON MAR 9 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY. SNOW SHOWERS WILL INCREASE THROUGH THE EVENING AND PERSIST INTO EARLY TUESDAY MORNING. SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED FOR THE CAMAS PRAIRIE...WITH THE HIGHEST ACCUMULATIONS ABOVE 3000 FEET. THE SNOW SHOWERS WILL BE LOCALLY HEAVY AT TIMES...LEADING TO LOW VISIBILITY AND RAPID ACCUMULATING SNOWFALL UNDER THE HEAVIEST SHOWERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD. $$
4 follow-up statements
000 WWUS46 KOTX 100704 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 1204 AM PDT TUE MAR 10 2009 ...MORE LATE SEASON SNOW FOR THE VALLEYS OF THE IDAHO PANHANDLE AND FOR THE LOWLANDS OF FAR EASTERN WASHINGTON... .SNOW WILL BE WINDING DOWN OVER THE IDAHO PANHANDLE AND ADJACENT PORTIONS OF EASTERN WASHINGTON ON TUESDAY MORNING. FROM MIDNIGHT THROUGH MID MORNING...THE MOST SIGNIFICANT ACCUMULATIONS WILL BE OVER THE MOUNTAINS OF THE CENTRAL IDAHO PANHANDLE. IDZ002-003-WAZ033-101200- /O.CON.KOTX.WS.W.0022.000000T0000Z-090310T1200Z/ COEUR DALENE AREA-IDAHO PALOUSE-WASHINGTON PALOUSE- INCLUDING THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS... HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN 1204 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT TUESDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT TUESDAY. AN ADDITIONAL INCH OF SNOW WILL BE POSSIBLE BETWEEN MIDNIGHT AND 5 AM IN THE PULLMAN...MOSCOW...AND COEUR DALENE AREAS. TOTAL SNOW AMOUNTS FROM THIS STORM WILL BE HIGHLY VARIABLE DUE TO THE SHOWERY NATURE OF THE SNOW. MOST SPOTS OVER THE PALOUSE AND AROUND COEUR DALENE CAN EXPECT TOTAL SNOW AMOUNTS RANGING FROM 4 TO 7 INCHES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS...HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN. $$ IDZ004-101515- /O.CON.KOTX.WS.W.0022.000000T0000Z-090310T1800Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS 1204 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT TUESDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT TUESDAY. AN ADDITIONAL 2 TO 3 INCHES OF SNOW IS LIKELY BETWEEN MIDNIGHT AND 8 AM IN THE CENTRAL IDAHO PANHANDLE. TOTAL ACCUMULATIONS IN THE VALLEY COMMUNITIES OF KELLOGG...WALLACE...ST MARIES...AND AVERY WILL GENERALLY BE IN THE 4 TO 8 INCH RANGE. MOUNTAIN ACCUMULATIONS ARE EXPECTED TO BE BETWEEN 6 AND 10 INCHES. SNOW WILL DECREASE TO SCATTERED SNOW SHOWERS BY MID MORNING. UNTIL THEN...MOTORISTS SHOULD BE PREPARED FOR TREACHEROUS DRIVING CONDITIONS ON INTERSTATE 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS. $$ IDZ001-WAZ036-037-101200- /O.CON.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ NORTHERN PANHANDLE-SPOKANE AREA-NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD... SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD 1204 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT TUESDAY. AN ADDITIONAL INCH OF ACCUMULATION WILL BE POSSIBLE BETWEEN MIDNIGHT AND 5 AM OVER THE SPOKANE AREA...THE NORTHEAST WASHINGTON MOUNTAINS...AND OVER THE NORTHERN IDAHO PANHANDLE. TOTAL SNOW AMOUNTS FROM THIS STORM WILL BE HIGHLY VARIABLE. SOME PLACES AROUND DEER PARK...RATHDRUM...AND NORTH SPOKANE EXPERIENCED HEAVY SNOW SHOWERS ON MONDAY...AND COULD HAVE TOTAL ACCUMULATIONS AS HIGH AS 6 OR 7 INCHES. OTHER SPOTS MAY ONLY HAVE TOTAL ACCUMULATIONS OF 1 TO 3 INCHES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD... SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD. $$ IDZ026-WAZ032-101500- /O.CON.KOTX.WW.Y.0026.000000T0000Z-090310T1500Z/ LEWISTON AREA-LOWER GARFIELD AND ASOTIN COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI...PECK... CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT 1204 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY. UP TO AN INCH OF ADDITIONAL SNOW ACCUMULATION WILL BE POSSIBLE BETWEEN MIDNIGHT AND 5 AM IN THE COMMUNITIES OF POMEROY... CULDESAC...AND GIFFORD AREAS. TOTAL SNOW ACCUMULATIONS OF 2 TO 4 INCHES WILL BE POSSIBLE IN THESE COMMUNITIES. SNOW TOTALS IN THE LOWER ELEVATIONS AROUND LEWISTON AND CLARKSTON WILL LIKELY BE AROUND AN INCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI... PECK...CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT. $$ IDZ027-101500- /O.CON.KOTX.WW.Y.0026.000000T0000Z-090310T1500Z/ LEWIS AND SOUTHERN NEZ PERCE COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD 1204 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT TUESDAY. AN ADDITIONAL 1 TO 2 INCHES OF SNOW WILL BE POSSIBLE IN THE WINCHESTER AND NEZPERCE AREAS BETWEEN MIDNIGHT AND 8 AM. TOTAL SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED FOR THE CAMAS PRAIRIE...WITH THE HIGHEST ACCUMULATIONS ABOVE 3000 FEET. SNOW WILL DECREASE TO SCATTERED SNOW SHOWERS BY MID MORNING. UNTIL THEN...MOTORISTS SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD. $$
000 WWUS46 KOTX 101048 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 348 AM PDT TUE MAR 10 2009 IDZ002-003-WAZ033-101200- /O.CON.KOTX.WS.W.0022.000000T0000Z-090310T1200Z/ COEUR DALENE AREA-IDAHO PALOUSE-WASHINGTON PALOUSE- INCLUDING THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS... HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN 348 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING... A WINTER STORM WARNING FOR HEAVY SNOW REMAINS IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING. SPOTTY ACCUMULATIONS UP TO ANOTHER INCH OF SNOW WILL BE POSSIBLE OVER THE PALOUSE AND IN THE COEUR DALENE AREA EARLY THIS MORNING. SNOW IS EXPECTED TO COME TO AN END PRIOR TO SUNRISE. TOTAL SNOW AMOUNTS FROM THIS STORM WILL BE HIGHLY VARIABLE DUE TO THE SHOWERY NATURE OF THE SNOW. MOST SPOTS OVER THE PALOUSE AND AROUND COEUR DALENE CAN EXPECT TOTAL SNOW AMOUNTS RANGING FROM 4 TO 7 INCHES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS...HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN. $$ IDZ004-101400- /O.CON.KOTX.WS.W.0022.000000T0000Z-090310T1800Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS 348 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING. AN ADDITIONAL 1 TO 2 INCHES OF SNOW IS LIKELY BY LATE MORNING OVER THE CENTRAL IDAHO PANHANDLE. SNOW WILL DECREASE TO SCATTERED LIGHT SNOW SHOWERS AFTER 11 AM. TOTAL ACCUMULATIONS IN THE VALLEY COMMUNITIES OF KELLOGG...WALLACE...ST MARIES...AND AVERY WILL GENERALLY BE IN THE 4 TO 8 INCH RANGE. MOUNTAIN ACCUMULATIONS ARE EXPECTED TO BE BETWEEN 6 AND 10 INCHES. SNOW WILL DECREASE TO SCATTERED SNOW SHOWERS BY MID MORNING. UNTIL THEN...MOTORISTS SHOULD BE PREPARED FOR TREACHEROUS DRIVING CONDITIONS ON INTERSTATE 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS. $$ IDZ026-WAZ032-101200- /O.EXT.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ LEWISTON AREA-LOWER GARFIELD AND ASOTIN COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI...PECK... CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT 348 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING. SNOW WILL COME TO AN END PRIOR TO SUNRISE IN THE POMEROY... LEWISTON...CLARKSTON...AND GIFFORD AREAS. TOTAL SNOW ACCUMULATIONS WILL RANGE FROM 1 TO 4 INCHES. THE HEAVIEST ACCUMULATIONS WILL BE IN THE HIGHER ELEVATIONS EAST OF LEWISTON...AND LOCALLY AROUND POMEROY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI... PECK...CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT. $$ IDZ027-101400- /O.EXT.KOTX.WW.Y.0026.000000T0000Z-090310T1800Z/ LEWIS AND SOUTHERN NEZ PERCE COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD 348 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 AM PDT THIS MORNING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 11 AM PDT THIS MORNING. AN ADDITIONAL 1 OR 2 INCHES OF SNOW WILL BE POSSIBLE IN THE WINCHESTER AND NEZPERCE AREAS BY LATE THIS MORNING. TOTAL SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED FOR THE CAMAS PRAIRIE...WITH THE HIGHEST ACCUMULATIONS ABOVE 3000 FEET. SNOW WILL DECREASE TO SCATTERED SNOW SHOWERS BY MID MORNING. UNTIL THEN...MOTORISTS SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD. $$ IDZ001-WAZ036-037-101200- /O.CON.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ NORTHERN PANHANDLE-SPOKANE AREA-NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD... SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD 348 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT EARLY THIS MORNING. SNOW WILL COME TO AN END IN THE NORTHEAST WASHINGTON MOUNTAINS... THE NORTHERN IDAHO PANHANDLE...AND IN THE SPOKANE AREA BEFORE SUNRISE. TOTAL ACCUMULATIONS WILL BE AS HIGH AS 6 OR 7 INCHES AROUND DEER PARK...CHATTAROY...AND NORTH SPOKANE. OTHER SPOTS ALONG THE CANADIAN BORDER AND SOUTH OF SPOKANE MAY ONLY RECEIVE TOTAL ACCUMULATIONS OF 1 TO 3 INCHES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD... SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD. $$
000 WWUS46 KOTX 101200 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 500 AM PDT TUE MAR 10 2009 IDZ002-003-WAZ033-101300- /O.EXP.KOTX.WS.W.0022.000000T0000Z-090310T1200Z/ COEUR DALENE AREA-IDAHO PALOUSE-WASHINGTON PALOUSE- INCLUDING THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS... HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN 500 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING... THE WINTER STORM WARNING FOR HEAVY SNOW WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING. SNOW WILL COME TO AN END IN THE PULLMAN...MOSCOW...AND COEUR DALENE AREAS BETWEEN 5 AM AND 6 AM. ADDITIONAL ACCUMULATIONS WILL BE LESS THAN AN INCH. THIS INCLUDES THE FOLLOWING LOCATIONS...COEUR DALENE...POST FALLS...HAYDEN...WORLEY...MOSCOW...PLUMMER...POTLATCH...GENESEE... PULLMAN...COLFAX...ROSALIA...LA CROSSE...OAKESDALE...TEKOA... UNIONTOWN. $$ IDZ001-WAZ036-037-101300- /O.EXP.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ NORTHERN PANHANDLE-SPOKANE AREA-NORTHEAST MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD... SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD 500 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING... THE WINTER WEATHER ADVISORY FOR SNOW WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING. SNOW HAS COME TO AN END IN THE SPOKANE AREA...THE NORTHEAST WASHINGTON MOUNTAINS...AND IN THE NORTHERN IDAHO PANHANDLE. NO ADDITIONAL SNOW ACCUMULATIONS ARE EXPECTED TODAY. THIS INCLUDES THE FOLLOWING LOCATIONS...SANDPOINT...RATHDRUM... BONNERS FERRY...PRIEST RIVER...SCHWEITZER MOUNTAIN ROAD... SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE...DEER PARK... CHEWELAH...NEWPORT...KETTLE FALLS...SPRINGDALE-HUNTERS ROAD... ORIN-RICE ROAD...FLOWERY TRAIL ROAD. $$ IDZ026-WAZ032-101300- /O.EXP.KOTX.WW.Y.0026.000000T0000Z-090310T1200Z/ LEWISTON AREA-LOWER GARFIELD AND ASOTIN COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI...PECK... CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT 500 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 5 AM PDT EARLY THIS MORNING. SNOW SHOWERS WILL COME TO AN END BETWEEN 5 AM AND 6 AM IN THE LEWISTON...CLARKSTON...AND POMEROY AREAS. NO ADDITIONAL ACCUMULATIONS ARE EXPECTED THIS MORNING. THIS INCLUDES THE FOLLOWING LOCATIONS...LEWISTON...LAPWAI... PECK...CULDESAC...GIFFORD...CLARKSTON...POMEROY...ALPOWA SUMMIT. $$ IDZ004-101800- /O.CON.KOTX.WS.W.0022.000000T0000Z-090310T1800Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS 500 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING. AN ADDITIONAL 1 TO 2 INCHES OF SNOW IS LIKELY BY LATE MORNING OVER THE CENTRAL IDAHO PANHANDLE. SNOW WILL DECREASE TO SCATTERED LIGHT SNOW SHOWERS AFTER 11 AM. TOTAL ACCUMULATIONS IN THE VALLEY COMMUNITIES OF KELLOGG...WALLACE...ST MARIES...AND AVERY WILL GENERALLY BE IN THE 4 TO 8 INCH RANGE. MOUNTAIN ACCUMULATIONS ARE EXPECTED TO BE BETWEEN 6 AND 10 INCHES. SNOW WILL DECREASE TO SCATTERED SNOW SHOWERS BY MID MORNING. UNTIL THEN...MOTORISTS SHOULD BE PREPARED FOR TREACHEROUS DRIVING CONDITIONS ON INTERSTATE 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. SNOW ACCUMULATIONS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && THIS INCLUDES THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS. $$ IDZ027-101800- /O.CON.KOTX.WW.Y.0026.000000T0000Z-090310T1800Z/ LEWIS AND SOUTHERN NEZ PERCE COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD 500 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING. AN ADDITIONAL 1 OR 2 INCHES OF SNOW WILL BE POSSIBLE IN THE WINCHESTER AND NEZPERCE AREAS BY LATE THIS MORNING. TOTAL SNOW ACCUMULATIONS OF 2 TO 4 INCHES ARE EXPECTED FOR THE CAMAS PRAIRIE...WITH THE HIGHEST ACCUMULATIONS ABOVE 3000 FEET. SNOW WILL DECREASE TO SCATTERED SNOW SHOWERS BY MID MORNING. UNTIL THEN...MOTORISTS SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && THIS INCLUDES THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD. $$
000 WWUS46 KOTX 101759 WSWOTX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SPOKANE WA 1059 AM PDT TUE MAR 10 2009 IDZ004-101900- /O.EXP.KOTX.WS.W.0022.000000T0000Z-090310T1800Z/ CENTRAL PANHANDLE MOUNTAINS- INCLUDING THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS 1059 AM PDT TUE MAR 10 2009 ...WINTER STORM WARNING WILL EXPIRE AT 11 AM PDT THIS MORNING... THE WINTER STORM WARNING WILL EXPIRE AT 11 AM PDT THIS MORNING. SCATTERED SNOW SHOWERS WILL CONTINUE THROUGH THE AFTERNOON WITH MINOR ACCUMULATIONS...BUT THE THREAT FOR HEAVY SNOW HAS ENDED. THIS INCLUDES THE FOLLOWING LOCATIONS...KELLOGG...PINEHURST... OSBURN...WALLACE...MULLAN...FOURTH OF JULY PASS...DOBSON PASS... LOOKOUT PASS. $$ IDZ027-101900- /O.EXP.KOTX.WW.Y.0026.000000T0000Z-090310T1800Z/ LEWIS AND SOUTHERN NEZ PERCE COUNTIES- INCLUDING THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD 1059 AM PDT TUE MAR 10 2009 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM PDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM PDT THIS MORNING. ISOLATED TO SCATTERED SNOW SHOWERS MAY CONTINUE THIS AFTERNOON WITH ONLY MINOR ACCUMULATIONS...BUT THE THREAT FOR SIGNIFICANT SNOW HAS ENDED. THIS INCLUDES THE FOLLOWING LOCATIONS...CRAIGMONT...NEZPERCE... WINCHESTER...SOLDIERS MEADOW ROAD. $$
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Spokane, WA wrote its last area forecast discussion before this winter storm warning went out at Mar 9, 4:21 PM PDT, 1 hour 51 minutes earlier.
Area forecast discussion, Mar 9, 4:21 PM PDT, 1 hour 51 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPOKANE WA
421 PM PDT MON MAR 9 2009
.SYNOPSIS...
A STRONG ARCTIC COLD FRONT WILL SWEEP THROUGH WASHINGTON AND IDAHO
TONIGHT. LOCALLY WINDY AND SNOWY CONDITIONS WILL ACCOMPANY THE
PASSAGE OF THE ARCTIC FRONT. AFTER SNOW SHOWERS TAPER OFF TUESDAY
MORNING MUCH COLDER TEMPERATURES ARE EXPECTED THROUGH THURSDAY
MORNING BEFORE A SLOW WARMING TREND BEGINS. ANOTHER STORM SYSTEM
WITH MORE LIGHT SNOW OR RAIN IS POSSIBLE THIS WEEKEND.
&&
.DISCUSSION...
TONIGHT AND TUESDAY...INFRARED SATELLITE SHOWS A COLD UPPER LEVEL
TROUGH OVER THE AREA THIS AFTERNOON. AT THE SFC...A TROUGH EXTENDS
FROM NW WASHINGTON TOWARDS HANFORD IN THE COLUMBIA BASIN. THIS SFC
TROUGH WILL BE A KEY PLAYER IN SNOW ACCUMULATIONS TONIGHT AS THE
GFS SHOWS A TROWAL FEATURE AND AN AREA OF DEFORMATION ON THE
IMMEDIATELY EAST AND NORTH SIDE OF THE SFC LOW. THE TREND IN SFC
OBS SHOW THE GREATEST PRESSURE FALLS AROUND YAKIMA AND
HANFORD...WHICH AGREES WITH THE GFS MODEL IDEA IN TRACKING THE SFC
LOW ACROSS THE SOUTHERN COLUMBIA BASIN INTO THE PALOUSE. THIS WILL
PLACE THE SPOKANE/COEUR D'ALENE AREA IN THE FAVORABLE
TROWAL/DEFORMATION AREA OF THE SFC LOW THIS EVENING...AND THEN
ONCE THE LOW PULLS OUT FAVORABLE UPSLOPE FLOW WILL KEEP SNOW
PERSISTING LONGEST OVER THE PALOUSE...CENTRAL PANHANDLE...AND
CAMAS PRAIRIE AREAS. THE LEWISTON AND CLARKSTON ZONES WILL ALSO
LIKELY RECEIVED SOME SNOW FOR THIS FEATURE WHERE A WINTER WEATHER
ADVISORY WILL BE ADDED.
TOTAL SNOW ACCUMULATIONS WILL LOCALLY APPROACH WARNING CRITERIA AS
SOME AREAS SUCH AS NWS SPOKANE...AND PLUMMER HAVE ALREADY
RECEIVED 4 INCHES OF SNOW FROM CONVECTIVE SNOW SHOWERS. BUT OTHER
AREAS HAVE HAD MUCH LESS SNOWFALL SO A CONTINUATION OF WINTER
WEATHER ADVISORIES CONTINUES GIVEN EXPECTED LOCALIZED COVERAGE OF
HEAVIER SNOWFALL. GOING WITH RATHER HIGH 20:1 SNOW AMT:QPF RATIOS
TONIGHT WITH STRONG OMEGA IN THE DENDRITIC GROWN ZONE WILL YIELD
AN ADDITIONAL 2-3 INCHES OF ACCUMULATION ON AVERAGE FOR THE
SPOKANE/COEUR D'ALENE AREAS AS WELL AS THE PALOUSE. AGAIN SOME
AREAS WILL LOCALLY RECEIVE LESS OR MORE SNOWFALL DEPENDING ON
WHERE THE HEAVIEST SHOWERS FALL. COLD NORTHERLY WINDS ARE ALREADY
BLOWING DOWN THE PURCELL TRENCH AND OKANOGAN VALLEY WITH THE SFC
LOW TO THE SOUTH OF THESE AREAS THIS AFTERNOON...AS THE LOW PULLS
OUT OF THE AREA LATER TONIGHT INTO TUESDAY MORNING THE COLD AND
GUSTY WINDS WILL MOVE INTO THE AREA WITH FALLING TEMPERATURES.
WITH 850MB TEMPS AROUND -15C TUESDAY IN THE GFS/NAM...COMPLETE DRY
ADIABATIC MIXING WILL ONLY YIELDS HIGHS MAINLY IN THE 20S
VALLEYS...WHICH IS ABOUT 25 DEGREES BELOW NORMAL. THE AIR MASS
WILL STABILIZE GREATLY WITH THE DEPARTING TROUGH ON TUESDAY WITH A
SIGNIFICANT DRYING TREND EXPECTED. JW
TUESDAY NIGHT THROUGH THURSDAY...THE MAIN WEATHER ELEMENT OF NOTE
DURING THIS PERIOD WILL BE THE BONE CHILLING COLD MORNING LOW
TEMPERATURES. ALL MODELS ARE IN GOOD AGREEMENT IN DEPICTING A
RELATIVELY SIMPLE FLOW REGIME FEATURING NORTHERLY FLOW ALOFT ON
THE EAST FLANK OF A BUILDING UPPER LEVEL RIDGE...WITH SURFACE HIGH
PRESSURE OVER BRITISH COLUMBIA SLOWLY DRIFTING INTO THE REGION AND
PROVIDING THE GRADIENT NECESSARY FOR A CONTINUOUS FEED OF COLD
AND DRY ARCTIC AIR THROUGH THE NORTHERN GAPS INTO THE COLUMBIA
BASIN. WEDNESDAY MORNING APPEARS TO BE THE COLDEST MORNING...WHEN
THE GRADIENT WILL SLACKEN...SKIES WILL CLEAR...AND DEPENDING ON
HOW MUCH SNOW COVER IS DEPOSITED BY TONIGHT'S STORM
SYSTEM...RADIATIONAL COOLING POTENTIAL WILL BE MAXIMIZED. AT MOST
LOCATIONS OVERNIGHT LOWS WILL FLIRT WITH RECORDS BY DAWN
WEDNESDAY...AND EVEN WHERE RECORDS ARE NOT BROKEN...THE MORNING
LOWS WILL LIKELY DIP TO 20 PLUS DEGREES BELOW CLIMATOLOGICAL
NORMALS. ON WEDNESDAY A WEAK SHORT WAVE ALOFT WILL SLIDE DOWN THE
UPPER RIDGE FLANK AND BRING A SLIGHT INCREASE AND THICKENING OF
HIGH CLOUDS. THESE CLOUDS WILL HELP INHIBIT INSOLATION A
BIT...PREVENTING WEDNESDAY'S HIGH TEMPERATURES FROM CLIMBING MUCH
ABOVE FREEZING. BY THURSDAY...AFTER ANOTHER FRIGID
MORNING...BETTER SUNSHINE PROSPECTS UNDER MOSTLY CLEAR SKIES AND A
DRY LOW LEVEL AIR MASS WILL ALLOW EFFICIENT SOLAR HEATING OF THE
LOW LEVEL AIR MASS AND PROMOTE HIGH TEMPERATURES AT LEAST SLIGHTLY
ABOVE FREEZING AT MOST VALLEY LOCATIONS. /FUGAZZI
FOR THURSDAY NIGHT AND FRIDAY...AN UPPER LEVEL RIDGE WILL SET UP
OVER THE REGION WITH DRY AND STABLE CONDITIONS ALONG WITH THE
POTENTIAL FOR FOG IN THE NORTHERN AND EASTERN VALLEYS.
TEMPERATURES WILL MODERATE TOWARD SEASONAL NORMALS.
BY FRIDAY NIGHT THROUGH SUNDAY NIGHT...THE RIDGE BREAKS DOWN. THERE
IS MODEL CONSENSUS THAT A TROUGH IN THE GULF OF ALASKA WILL
SPLIT...LEAVING A CUTOFF LOW IN THE LOWER LATITUDES AND ALLOWING A
SHORTWAVE TROUGH IN THE NORTHERN STREAM TO RUN RAMPANT INTO THE
WEST COAST RIDGE FOR THE WEEKEND. THE QUESTION IS WHEN WILL THE
RIDGE BREAK DOWN. THERE ARE SOME TIMING DIFFERENCES AMONG THE
MEDIUM RANGE MODELS AND THEIR ENSEMBLES...THE 12Z GFS IS MORE
AGGRESSIVE WITH SHORTWAVE MOVING INTO THE INLAND NORTHWEST BY
FRIDAY NIGHT. THE 00Z ECMWF IS MORE SLUGGISH AND HOLDS BACK THE
TROUGH UNTIL SATURDAY NIGHT...WHILE THE 12Z CANADIAN IS TOUTING A
MIDDLE OF THE ROAD SOLUTION...TRACKING THE WAVE THROUGH REGION ON
SATURDAY AS A WEAKER FEATURE IN A WESTERLY FLOW. THE 12Z ECMWF
CAME IN AND CLOSELY RESEMBLED THE CANADIAN AND A SLIGHTLY SLOWER
GFS. WITH THE GFS HAVING RUN TO RUN CONSISTENCY ISSUES...OPTED TO
LEAN MORE TOWARD THE ECMWF DESPITE ITS PROGRESSION TOWARD THE
LATEST GFS SOLUTION.
SO INTRODUCED SMALL POPS NEAR THE CREST FOR LATE FRIDAY
NIGHT...THEN INCREASED POPS ACROSS THE ENTIRE REGION ON SATURDAY.
THIS COINCIDES WITH THE FRONTAL PASSAGE AND THE DROP IN 850MB
TEMPS AMONG THE MODELS BY SATURDAY AFTERNOON. DID RAISE SURFACE
TEMPERATURES TO NEAR SEASONAL NORMALS...TO INDICATED A VALLEY RAIN
AND MOUNTAIN SNOW EVENT. BY SATURDAY NIGHT AND INTO SUNDAY...THE
UPPER TROUGH PULLS EAST AND LEAVES A MORE UNSTABLE NORTHWEST FLOW
ACROSS THE REGION. ANTICIPATE DRIER CONDITIONS IN THE LEE SIDE OF
THE CASCADES AND WESTERN BASIN WHILE THE CHANCE OF SHOWERS
INCREASE IN THE IDAHO PANHANDLE AND THE BLUE MOUNTAINS. SNOW LEVELS
TUMBLE WITH A GOOD SHOT OF SNOW SHOWERS IN MOST AREAS EXCEPT FOR
THE LC VALLEY.
BY MONDAY...RIDGE IS EXPECTED TO GRADUALLY RETURN AFTER THE
TROUGH PASSAGE INTO EARLY NEXT WEEK...BUT CONFIDENCE IS LOW IF IT
WILL BE AS STRONG AS ADVERTISED BY THE LATEST GFS. LOWERED POPS
BELOW CLIMO BUT STILL RETAINED SMALL CHANCE OF SHOWERS IN THE
IDAHO PANHANDLE AND THE CASCADE CREST. TEMPERATURES CONTINUE TO
WARM AND ANTICIPATE SURFACE TEMPERATURES SOME ABOVE NORMAL
READINGS. /RFOX.
&&
.AVIATION...
A COLD AND MOIST AND UNSTABLE AIR MASS OVER THE REGION WILL PROMOTE
WIDESPREAD MOUNTAIN OBSCURATIONS AND SNOW SHOWERS WITH IFR CEILINGS
AND VIS EAST OF A LINE FROM KOMK TO KLWS THROUGH 12Z TUESDAY. SNOW
SHOWERS WILL TAPER OFF AT THE KGEG VICINITY TAF SITES AND KPUW AFTER
14Z TUESDAY. WEST OF THIS LINE SNOW SHOWERS WILL BE SCATTERED...BECOMING
ISOLATED AFTER 06Z TONIGHT AS A COLD AND DRY ARCTIC AIR MASS INVADES
THE REGION FROM THE NORTH. SCATTERED SNOW SHOWERS WILL LINGER OVER
OVER THE IDAHO PANHANDLE THROUGH TUESDAY.
&&
.PRELIMINARY POINT TEMPS/POPS...
SPOKANE 12 21 5 27 13 33 / 70 20 0 0 0 0
COEUR D'ALENE 12 18 4 28 10 34 / 80 20 0 0 0 0
PULLMAN 16 25 7 27 12 34 / 80 20 0 0 0 0
LEWISTON 25 29 15 35 20 37 / 80 20 0 0 0 0
COLVILLE 11 22 -1 29 3 37 / 70 0 0 0 0 0
SANDPOINT 12 17 3 29 7 34 / 70 10 0 0 0 0
KELLOGG 16 19 -2 27 10 34 / 90 50 10 0 10 0
MOSES LAKE 16 27 11 33 17 42 / 30 0 0 0 0 0
WENATCHEE 16 28 12 37 20 39 / 20 0 0 0 0 0
OMAK 8 21 3 34 13 36 / 30 0 0 0 0 0
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...WINTER WEATHER ADVISORY FROM 8 PM THIS EVENING TO 8 AM PDT
TUESDAY FOR CENTRAL PANHANDLE MOUNTAINS...NORTHERN
PANHANDLE.
WINTER WEATHER ADVISORY FROM 8 PM THIS EVENING TO 8 AM PDT
TUESDAY FOR LEWIS AND SOUTHERN NEZ PERCE COUNTIES.
WINTER WEATHER ADVISORY FROM 8 PM THIS EVENING TO 8 AM PDT
TUESDAY FOR LEWISTON AREA.
WINTER WEATHER ADVISORY UNTIL 5 AM PDT TUESDAY FOR COEUR D'ALENE
AREA...IDAHO PALOUSE.
WA...WINTER WEATHER ADVISORY FROM 8 PM THIS EVENING TO 8 AM PDT
TUESDAY FOR LOWER GARFIELD AND ASOTIN COUNTIES.
WINTER WEATHER ADVISORY UNTIL 5 AM PDT TUESDAY FOR SPOKANE
AREA...WASHINGTON PALOUSE.
WINTER WEATHER ADVISORY UNTIL 5 AM PDT TUESDAY FOR NORTHEAST
MOUNTAINS.
&&Hazardous weather outlook, Mar 9, 2:56 PM PDT, 3 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPOKANE WA 256 PM PDT MON MAR 9 2009 IDZ001>004-026-027-WAZ031>033-036-037-102200- NORTHERN PANHANDLE-COEUR DALENE AREA-IDAHO PALOUSE- CENTRAL PANHANDLE MOUNTAINS-LEWISTON AREA- LEWIS AND SOUTHERN NEZ PERCE COUNTIES-NORTHEAST BLUE MOUNTAINS- LOWER GARFIELD AND ASOTIN COUNTIES-WASHINGTON PALOUSE- SPOKANE AREA-NORTHEAST MOUNTAINS- 256 PM PDT MON MAR 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO... NORTH CENTRAL IDAHO...NORTHEAST WASHINGTON AND SOUTHEAST WASHINGTON. .DAY ONE...THIS AFTERNOON AND TONIGHT SNOW ACCUMULATIONS ARE EXPECTED TO MAKE TRAVEL HAZARDOUS OVER NORTH IDAHO AND FAR EASTERN WASHINGTON TODAY AND TONIGHT. GIVEN SHOWERY NATURE OF THE SNOW A WIDE RANGE OF SNOW ACCUMULATIONS ARE EXPECTED...WITH MOST LOCATIONS EXPECTED TO RECEIVE MODERATE ACCUMULATIONS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY BITTERLY COLD AIR WILL ENTER EASTERN WASHINGTON AND NORTHERN IDAHO TONIGHT BEHIND A POTENT ARCTIC COLD FRONT. WIND CHILLS WILL DIP INTO THE SINGLE DIGITS...AND POSSIBLY BELOW ZERO...EARLY ON TUESDAY MORNING. THE COLD UNUSUALLY COLD WEATHER WILL PERSIST INTO WEDNESDAY. THE COLDEST NIGHT WILL BE TUESDAY NIGHT. LOWS WILL FALL INTO THE SINGLE DIGITS...AND SOME SPOTS MAY DIP BELOW ZERO. RECORD LOW TEMPERATURES WILL BE POSSIBLE. WAZ034-035-038-041>044-102200- MOSES LAKE AREA-UPPER COLUMBIA BASIN-OKANOGAN HIGHLANDS- WENATCHEE AREA-EAST SLOPES NORTHERN CASCADES-OKANOGAN VALLEY- WATERVILLE PLATEAU- 256 PM PDT MON MAR 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL WASHINGTON...EAST CENTRAL WASHINGTON AND NORTH CENTRAL WASHINGTON. .DAY ONE...THIS AFTERNOON AND TONIGHT UNSEASONABLY COLD CONDITIONS WILL ACCOMPANY THE PASSAGE OF AN ARCTIC COLD FRONT LATE TODAY. BLUSTERY NORTH WINDS WILL CONTINUE THROUGH THE OKANOGAN VALLEY. AFTER MIDNIGHT WIND CHILLS WILL BE WELL BELOW ZERO IN THE OKANOGAN VALLEY...THE GRAND COULEE AREA...AND OVER THE WATERVILLE PLATEAU. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY UNUSUALLY COLD WEATHER WILL PERSIST INTO WEDNESDAY. THE COLDEST NIGHT WILL BE TUESDAY NIGHT. LOWS WILL FALL INTO THE SINGLE DIGITS...AND SOME SPOTS MAY DIP BELOW ZERO. THIS WILL LEAD TO RECORD LOW TEMPERATURES WILL BE POSSIBLE.
Nearby
Winter Storm Warnings in Idaho, 2009Winter Storm Warnings in Washington, 2009Every winter storm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.