Alert archive / Idaho / Winter Weather Advisories in 2021
Winter Weather Advisory 19, NWS Spokane, WA
NWS Spokane, WA issued this winter weather advisory at Feb 24, 2021, 11:12 AM PST for 5 counties in Washington; 8 counties in Idaho. It took effect at Feb 25, 2021, 4:00 AM PST. It was in force for 35 hr.
The area
The counties it named.
The facts
- Issued
- Feb 24, 2021, 11:12 AM PST (19:12 UTC)
- In effect from
- Feb 25, 2021, 4:00 AM PST
- Expired
- Feb 26, 2021, 3:12 PM PST
- In force
- 35 hr
- Issued by
- NWS Spokane, WA
Counties Benewah County, ID, Bonner County, ID, Boundary County, ID, Kootenai County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Lincoln County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA, Whitman County, WA
The radar
The Spokane radar (KOTX), 52 km from the middle of the area, began a volume at 19:13 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
Spokane, WA (KOTX), launched 12:00Z, 7.2 hours before the alert went out and 48 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
- 1020 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather 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 winter weather advisory went out at Feb 24, 4:01 AM PST, 7 hours 11 minutes earlier.
Area forecast discussion, Feb 24, 4:01 AM PST, 7 hours 11 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 |
|---|---|---|---|---|
| Feb 24, 3:49 AM PST | Winter Storm Watch | OTX | Asotin, Garfield | 16 hr |
| Feb 24, 3:02 PM PST | Wind Advisory | OTX | Adams, Asotin, Chelan, Douglas, Garfield, Grant and 4 more | 48 hr |
Nearby
Winter Weather Advisories in Idaho, 2021Winter Weather Advisories in Washington, 2021Every winter weather 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.