Alert archive / Washington / Areal Flood Advisories in 2021
Areal Flood Advisory 1, NWS Spokane, WA
NWS Spokane, WA issued this areal flood advisory at Jan 4, 2021, 11:52 AM PST for Garfield County, Whitman County, Washington; Benewah County, Latah County, Idaho. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Jan 4, 2021, 11:52 AM PST (19:52 UTC)
- Expired
- Jan 5, 2021, 8:45 AM PST
- In force
- 21 hr
- Issued by
- NWS Spokane, WA
- Area
- Storm-based polygon
Counties Benewah County, ID, Latah County, ID, Garfield County, WA, Whitman County, WA
The radar
The Spokane radar (KOTX), 101 km from the middle of the area, began a volume at 19:57 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.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 7.9 hours before the alert went out and 497 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1756 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 210 m²/s²
- 0-3 km storm-relative helicity
- 284 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory 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 advisory went out at Jan 4, 11:39 AM PST, 13 minutes earlier.
Area forecast discussion, Jan 4, 11:39 AM PST, 13 minutes before
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</html>Hazardous weather outlook, Jan 4, 6:53 AM PST, 4 hours 59 minutes before
Hazardous Weather Outlook National Weather Service Spokane WA 653 AM PST Mon Jan 4 2021 IDZ002-003-026-027-WAZ032>036-051500- Coeur d'Alene Area-Idaho Palouse-Lewiston Area- Lewis and Southern Nez Perce Counties- Lower Garfield and Asotin Counties-Washington Palouse- Moses Lake Area-Upper Columbia Basin-Spokane Area- 653 AM PST Mon Jan 4 2021 This Hazardous Weather Outlook is for portions of North Idaho... North Central Idaho...East Central Washington...Northeast Washington and Southeast Washington. .DAY ONE...TODAY AND TONIGHT Another wet weather system to impact the region. Additional rainfall and melting will result in rises to small streams and creeks. Minor flooding of low lying areas will be possible. Breezy to windy conditions expected over the Palouse and Camas Prairie today as well. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Lowland snow will be possible on Wednesday with the arrival of a colder weather system. IDZ001-004-WAZ031-037-038-041>044-051500- Northern Panhandle-Central Panhandle Mountains- Northeast Blue Mountains-Northeast Mountains-Okanogan Highlands- Wenatchee Area-East Slopes Northern Cascades-Okanogan Valley- Waterville Plateau- 653 AM PST Mon Jan 4 2021 This Hazardous Weather Outlook is for portions of North Idaho... Central Washington...North Central Washington...Northeast Washington and Southeast Washington. .DAY ONE...TODAY AND TONIGHT Snow today across the northern valleys and mountains. Heaviest snow is expected over the east slopes of the northern Cascades over to the Okanogan Highlands Monday morning and afternoon. Snow will transition to rain up the valleys from south to north late this morning into the afternoon hours. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Widespread moderate snowfall will be possible on Wednesday.
In the hours before
Local storm report, Jan 4, 9:52 AM PST, 2 hours before
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</html>Local storm report, Jan 4, 10:21 AM PST, 1 hour 31 minutes before
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</html>Nearby
Areal Flood Advisories in Washington, 2021Areal Flood Advisories in Idaho, 2021Every areal flood advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.