Alert archive / Washington / Freeze Warnings in 2021
Freeze Warning 2, NWS Spokane, WA
NWS Spokane, WA issued this freeze warning at Sep 15, 2021, 2:31 PM PDT for 5 counties in Washington. It took effect at Sep 15, 2021, 11:00 PM PDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 15, 2021, 2:31 PM PDT (21:31 UTC)
- In effect from
- Sep 15, 2021, 11:00 PM PDT
- Expired
- Sep 16, 2021, 8:00 AM PDT
- In force
- 9 hr
- Issued by
- NWS Spokane, WA
Counties Ferry County, WA, Okanogan County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA
The radar
The Spokane radar (KOTX), 81 km from the middle of the area, began a volume at 21:31 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, 9.5 hours before the alert went out and 148 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
- 1359 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
793 WWUS76 KOTX 152131 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 231 PM PDT Wed Sep 15 2021 WAZ037-038-161500- /O.UPG.KOTX.FZ.A.0001.210916T0600Z-210916T1500Z/ /O.NEW.KOTX.FZ.W.0002.210916T0600Z-210916T1500Z/ Northeast Mountains-Okanogan Highlands- Including the cities of Colville, Deer Park, Chewelah, Newport, Kettle Falls, Republic, Inchelium, and Wauconda 231 PM PDT Wed Sep 15 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Colville, Deer Park, Chewelah, Newport, Kettle Falls, Republic, Inchelium, and Wauconda. * WHEN...From 11 PM this evening to 8 AM PDT Thursday. * IMPACTS...Frost and freeze conditions may kill crops and other sensitive vegetation, and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ IDZ001-161500- /O.UPG.KOTX.FZ.A.0001.210916T0600Z-210916T1500Z/ /O.NEW.KOTX.FR.Y.0003.210916T0600Z-210916T1500Z/ Northern Panhandle- Including the cities of Sandpoint, Rathdrum, Bonners Ferry, Priest River, and Eastport 231 PM PDT Wed Sep 15 2021 ...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Sandpoint, Rathdrum, Bonners Ferry, Priest River, and Eastport. * WHEN...From 11 PM this evening to 8 AM PDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IDZ003-WAZ033-035-036-047-049-161500- /O.NEW.KOTX.FR.Y.0003.210916T0600Z-210916T1500Z/ Idaho Palouse-Washington Palouse-Upper Columbia Basin- Spokane Area-Central Chelan County-Western Okanogan County- Including the cities of Moscow, Plummer, Potlatch, Genesee, Pullman, Colfax, Rosalia, La Crosse, Oakesdale, Tekoa, Uniontown, Ritzville, Grand Coulee, Odessa, Wilbur, Coulee City, Spokane, Cheney, Davenport, Rockford, Leavenworth, Plain, Lake Wenatchee, Mazama, Winthrop, Twisp, Methow, and Conconully 231 PM PDT Wed Sep 15 2021 ...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Moscow, Pullman, Colfax, Ritzville, Grand Coulee, Odessa, Coulee City, Spokane, Cheney, Davenport, Rockford, Leavenworth, Mazama, Winthrop, Twisp, Methow, and Conconully. * WHEN...From 11 PM this evening to 8 AM PDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
1 follow-up statement
730 WWUS76 KOTX 161517 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 817 AM PDT Thu Sep 16 2021 WAZ037-038-161630- /O.EXP.KOTX.FZ.W.0002.000000T0000Z-210916T1500Z/ Northeast Mountains-Okanogan Highlands- Including the cities of Colville, Deer Park, Chewelah, Newport, Kettle Falls, Republic, Inchelium, and Wauconda 817 AM PDT Thu Sep 16 2021 ...FREEZE WARNING HAS EXPIRED... The threat of freezing temperatures has ended for the day. $$ IDZ001-003-WAZ033-035-036-047-049-161630- /O.EXP.KOTX.FR.Y.0003.000000T0000Z-210916T1500Z/ Northern Panhandle-Idaho Palouse-Washington Palouse- Upper Columbia Basin-Spokane Area-Central Chelan County- Western Okanogan County- Including the cities of Sandpoint, Rathdrum, Bonners Ferry, Priest River, Eastport, Moscow, Plummer, Potlatch, Genesee, Pullman, Colfax, Rosalia, La Crosse, Oakesdale, Tekoa, Uniontown, Ritzville, Grand Coulee, Odessa, Wilbur, Coulee City, Spokane, Cheney, Davenport, Rockford, Leavenworth, Plain, Lake Wenatchee, Mazama, Winthrop, Twisp, Methow, and Conconully 817 AM PDT Thu Sep 16 2021 ...FROST ADVISORY HAS EXPIRED... The threat of frost has ended for the day. $$
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 2:31 PM PDT | Frost Advisory | OTX | Adams, Chelan, Douglas, Grant, Lincoln, Okanogan and 2 more | 17 hr |
Nearby
Freeze Warnings in Washington, 2021Every freeze warning 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.