Alert archive / Idaho / Areal Flood Warnings in 2009
Areal Flood Warning 2, NWS Spokane, WA
NWS Spokane, WA issued this areal flood warning at Jan 6, 2009, 2:54 PM PST for Asotin County, Garfield County, Whitman County, Washington; 4 counties in Idaho. It was in force for 3 days. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 6, 2009, 2:54 PM PST (22:54 UTC)
- Expired
- Jan 9, 2009, 3:00 PM PST
- In force
- 3 days
- Issued by
- NWS Spokane, WA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Benewah County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Asotin County, WA, Garfield County, WA, Whitman County, WA
The radar
The Spokane radar (KOTX), 131 km from the middle of the area, began a volume at 22:57 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 forecasters said that day
The local office's own words before this areal flood 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 areal flood warning went out at Jan 6, 2:42 PM PST, 12 minutes earlier.
Area forecast discussion, Jan 6, 2:42 PM PST, 12 minutes before
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</html>Hazardous weather outlook, Jan 6, 5:40 AM PST, 9 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SPOKANE WA 540 AM PST TUE JAN 6 2009 IDZ003-026-027-WAZ031>035-038-041>044-071345- IDAHO PALOUSE-LEWISTON AREA-LEWIS AND SOUTHERN NEZ PERCE COUNTIES- NORTHEAST BLUE MOUNTAINS-LOWER GARFIELD AND ASOTIN COUNTIES- WASHINGTON PALOUSE-MOSES LAKE AREA-UPPER COLUMBIA BASIN- OKANOGAN HIGHLANDS-WENATCHEE AREA-EAST SLOPES NORTHERN CASCADES- OKANOGAN VALLEY-WATERVILLE PLATEAU- 540 AM PST TUE JAN 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO... NORTH CENTRAL IDAHO...CENTRAL WASHINGTON...EAST CENTRAL WASHINGTON...NORTH CENTRAL WASHINGTON AND SOUTHEAST WASHINGTON. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A PROLONGED PERIOD OF SUBTROPICAL MOISTURE WILL BE AIMED AT THE AREA THROUGH THURSDAY MORNING BRINGING RISING SNOW LEVELS AND HEAVY RAINFALL TO PORTIONS OF THE AREA. THIS WILL LEAD TO RAPID RISES ON SMALL STREAMS DUE TO A COMBINATION OF RAIN AND SNOW MELT. STRONG WESTERLY FLOW WILL LEAD TO THE HIGHEST PRECIPITATION TOTALS AND THE MAIN FLOODING POTENTIAL FOR THE EAST SLOPES OF THE NORTH WASHINGTON CASCADES...CENTRAL PANHANDLE MOUNTAINS...SPOKANE AND COEUR DALENE AREAS...AND THE PALOUSE. URBAN FLOODING IS ALSO A GOOD POSSIBILITY. IDZ001-002-004-WAZ036-037-071345- NORTHERN PANHANDLE-COEUR DALENE AREA-CENTRAL PANHANDLE MOUNTAINS- SPOKANE AREA-NORTHEAST MOUNTAINS- 540 AM PST TUE JAN 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH IDAHO AND NORTHEAST WASHINGTON. .DAY ONE...TODAY AND TONIGHT SIGNIFICANT SNOW ACCUMULATIONS IS EXPECTED TODAY FOR THE SPOKANE REGION...NORTH IDAHO...AND NORTHEAST WASHINGTON. THE HEAVIEST SNOWS WILL FALL IN THE MOUNTAINS ADJACENT TO THE BC BORDER AND MONTANA. THE SNOW IS EXPECTED TO CHANGE TO RAIN IN THE SPOKANE AREA BY MIDDAY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A PROLONGED PERIOD OF SUBTROPICAL MOISTURE WILL BE AIMED AT THE AREA THROUGH THURSDAY MORNING BRINGING RISING SNOW LEVELS AND HEAVY RAINFALL TO PORTIONS OF THE AREA. THIS WILL LEAD TO RAPID RISES ON SMALL STREAMS DUE TO A COMBINATION OF RAIN AND SNOW MELT. STRONG WESTERLY FLOW WILL LEAD TO THE HIGHEST PRECIPITATION TOTALS AND THE MAIN FLOODING POTENTIAL FOR THE EAST SLOPES OF THE NORTH WASHINGTON CASCADES...CENTRAL PANHANDLE MOUNTAINS...SPOKANE AND COEUR DALENE AREAS...AND THE PALOUSE. URBAN FLOODING IS ALSO A GOOD POSSIBILITY.
In the hours before
Special weather statement, Jan 6, 9:06 AM PST, 5 hours 48 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SPOKANE WA 906 AM PST TUE JAN 6 2009 IDZ001>004-WAZ033-036-037-061915- NORTHERN PANHANDLE-COEUR DALENE AREA-IDAHO PALOUSE- CENTRAL PANHANDLE MOUNTAINS-WASHINGTON PALOUSE-SPOKANE AREA- NORTHEAST MOUNTAINS- INCLUDING THE CITIES OF...SANDPOINT...RATHDRUM...BONNERS FERRY... PRIEST RIVER...COEUR DALENE...POST FALLS...HAYDEN...MOSCOW... PLUMMER...POTLATCH...GENESEE...KELLOGG...ST MARIES...PINEHURST... OSBURN...WALLACE...MULLAN...PULLMAN...COLFAX...ROSALIA... LA CROSSE...SPOKANE...CHENEY...DAVENPORT...ROCKFORD...COLVILLE... DEER PARK...CHEWELAH...NEWPORT...KETTLE FALLS 906 AM PST TUE JAN 6 2009 ...SNOW LOADING ON ROOF TOPS...FOLLOWED BY THE POTENTIAL FOR HEAVY RAIN AND SUBSEQUENT URBAN AND SMALL STREAM FLOODING BY MID WEEK... SNOW LOADING FOR FLAT ROOFS AND LOW SLOPED ROOFS COULD BECOME A SERIOUS PROBLEM BY THIS EVENING. PRECIPITATION HAS CHANGED FROM SNOW TO RAIN OVER MOST OF THE SPOKANE AND COEUR DALENE AREA. SNOW WILL GRADUALLY CHANGE TO RAIN IN THE VALLEYS NORTH AND EAST OF THE METROPOLITAN AREA...INCLUDING DEER PARK...SANDPOINT...KELLOGG... AND ST MARIES. BY EARLY THIS EVENING AN ADDITIONAL QUARTER TO A THIRD OF AN INCH OF RAIN...OR LIQUID EQUIVALENT...IS LIKELY OVER THE EASTERN THIRD OF WASHINGTON AND MOST OF THE IDAHO PANHANDLE. ONCE THE RAIN BEGINS...PERIODS OF RAIN ARE EXPECTED TO PERSIST INTO THURSDAY WITH AS MUCH AS AN INCH AND A HALF OF LIQUID PRECIPITATION IN THE SPOKANE AREA...AND AMOUNTS POSSIBLY EXCEEDING 2 INCHES IN THE COEUR DALENE AND PULLMAN AREAS. THE RAIN WILL INITIALLY MAKE THE SNOW SITTING ON ROOF TOPS HEAVIER. THE DEEP...HEAVY SNOW COVER HAS CAUSED NUMEROUS ROOF FAILURES IN THE METROPOLITAN AREA...AND THE PROBLEM OF SNOW LOADING IS GOING TO GET WORSE DURING THE 24 TO 36 HOURS. OUTSIDE THE SPOKANE METRO...DEEP SNOW-PACK IS ALSO PREVALENT IN THE CHENEY...DEER PARK...DAVENPORT...BONNERS FERRY...SANDPOINT...AND KELLOGG AREAS. ACCORDING TO THE CITY OF SPOKANE...STRUCTURES WITH FLAT ROOFS WILL BE THE MOST PRONE TO HEAVY SNOW LOADING. THE ROOF DRAINS ON FLAT OR LOW-SLOPE BUILDINGS ARE EASILY BLOCKED BY ICE...AND MAY NOT DRAIN PROPERLY. THE ADDITION OF RAIN ONTO SNOW CAN BE ESPECIALLY PROBLEMATIC FOR FLAT ROOFS BECAUSE SNOW CAN ABSORB THE RAIN...INCREASING THE LOAD ON THE STRUCTURE. FOR MORE INFORMATION ON SNOW LOADING IN SPOKANE VISIT WWW.SPOKANECITY.ORG AND CLICK ON PREVENT ROOF COLLAPSE...AND...CITIZENS URGED TO CLEAR HYDRANTS... SIDEWALKS. URBAN STREET FLOODING WILL ALSO BECOME A MAJOR CONCERN BY TUESDAY EVENING. MOST SEWER DRAINS IN THE METRO AREA ARE BURIED UNDER SNOW. IF STORM DRAINS REMAIN CLOGGED WITH SNOW...STREET FLOODING WILL BE POSSIBLE TUESDAY NIGHT INTO WEDNESDAY.
Local storm report, Jan 6, 11:44 AM PST, 3 hours 10 minutes before
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</html>Local storm report, Jan 6, 11:48 AM PST, 3 hours 6 minutes before
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</html>Local storm report, Jan 6, 11:50 AM PST, 3 hours 4 minutes before
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</html>The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 5, 4:08 PM PST | Flood Watch | OTX | Asotin, Garfield, Lincoln, Pend Oreille, Spokane, Stevens and 1 more | 22 hr |
| Jan 6, 11:00 AM PST | Winter Storm Warning | OTX | Pend Oreille, Spokane, Stevens | 19 hr |
| Jan 6, 2:34 PM PST | Areal Flood Warning | OTX | Spokane | 71 hr |
| Jan 6, 2:46 PM PST | Areal Flood Advisory | OTX | Pend Oreille, Stevens | 47 hr |
Nearby
Areal Flood Warnings in Idaho, 2009Areal Flood Warnings in Washington, 2009Every areal flood 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; radar from the NEXRAD Level II archive.