Alert archive / Washington / Winter Storm Watches in 2019
Winter Storm Watch 13, NWS Spokane, WA
NWS Spokane, WA issued this winter storm watch at Dec 17, 2019, 1:58 PM PST for 8 counties in Washington; 6 counties in Idaho. It took effect at Dec 19, 2019, 6:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 17, 2019, 1:58 PM PST (21:58 UTC)
- In effect from
- Dec 19, 2019, 6:00 AM PST
- Expired
- Dec 18, 2019, 3:10 PM PST
- In force
- Issued by
- NWS Spokane, WA
Counties Benewah County, ID, Bonner County, ID, Boundary County, ID, Kootenai County, ID, Latah County, ID, Shoshone County, ID, Chelan County, WA, Douglas County, WA, Ferry County, WA, Grant County, WA, Okanogan County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA
The radar
The Spokane radar (KOTX), 28 km from the middle of the area, began a volume at 22:02 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, 10.0 hours before the alert went out and 109 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
- 1590 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 241 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 storm watch 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 watch went out at Dec 17, 4:04 AM PST, 9 hours 54 minutes earlier.
Area forecast discussion, Dec 17, 4:04 AM PST, 9 hours 54 minutes before
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</html>Hazardous weather outlook, Dec 17, 4:52 AM PST, 9 hours 6 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 |
|---|---|---|---|---|
| Dec 17, 1:58 PM PST | Winter Storm Warning | OTX | Chelan, Douglas, Ferry, Grant, Okanogan, Pend Oreille and 2 more | 70 hr |
Nearby
Winter Storm Watches in Washington, 2019Winter Storm Watches in Idaho, 2019Every winter storm watch in 2019
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.