Alert archive / Washington / Freeze Warnings in 2021
Freeze Warning 1, NWS Spokane, WA
NWS Spokane, WA issued this freeze warning at May 18, 2021, 2:41 AM PDT for 9 counties in Washington; Bonner County, Boundary County, Kootenai County, Idaho. It took effect at May 19, 2021, 1:00 AM PDT. It was in force for 7 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
- May 18, 2021, 2:41 AM PDT (09:41 UTC)
- In effect from
- May 19, 2021, 1:00 AM PDT
- Expired
- May 19, 2021, 8:00 AM PDT
- In force
- 7 hr
- Issued by
- NWS Spokane, WA
Counties Bonner County, ID, Boundary County, ID, Kootenai County, ID, Adams County, WA, Douglas County, WA, Ferry County, WA, Grant County, WA, Lincoln County, WA, Okanogan County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA
The radar
The Spokane radar (KOTX), 47 km from the middle of the area, began a volume at 09:41 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 00:00Z, 9.7 hours before the alert went out and 128 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
- 2809 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
559 WWUS76 KOTX 180941 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 241 AM PDT Tue May 18 2021 IDZ001-WAZ036>038-042-182330- /O.NEW.KOTX.FZ.W.0001.210519T0800Z-210519T1500Z/ Northern Panhandle-Spokane Area-Northeast Mountains-Okanogan Highlands-East Slopes Northern Cascades- Including the cities of Chewelah, Cheney, Rathdrum, Republic, Eastport, Conconully, Colville, Bonners Ferry, Stehekin, Kettle Falls, Rockford, Spokane, Sandpoint, Wauconda, Leavenworth, Newport, Mazama, Davenport, Priest River, Winthrop, Twisp, Deer Park, and Inchelium 241 AM PDT Tue May 18 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM PDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...Chewelah, Cheney, Tyler, Chattaroy, Republic, Curlew, Colville, Ione, Metaline Falls, Usk, Diamond Lake, Newport, Priest River, Priest Lake, Plain, Winthrop, Twisp, Mazama, Deer Park, Clayton and Loon Lake. * WHEN...From 1 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ LN
2 follow-up statements
754 WWUS76 KOTX 181906 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 1206 PM PDT Tue May 18 2021 WAZ035-191500- /O.EXA.KOTX.FZ.W.0001.210519T0800Z-210519T1500Z/ Upper Columbia Basin- Including the cities of Grand Coulee, Coulee City, Wilbur, Ritzville, and Odessa 1206 PM PDT Tue May 18 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM PDT WEDNESDAY UPPER COLUMBIA BASIN... * WHAT...Sub-freezing temperatures as low as 29 expected for Upper Columbia Basin. * WHERE...Wilbur, Creston, Wilson Creek, Odessa, and Sprague. * WHEN...From 1 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions could damage or kill sensitive plants. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IDZ001-WAZ036>038-042-191500- /O.CON.KOTX.FZ.W.0001.210519T0800Z-210519T1500Z/ Northern Panhandle-Spokane Area-Northeast Mountains-Okanogan Highlands-East Slopes Northern Cascades- Including the cities of Chewelah, Cheney, Rathdrum, Republic, Eastport, Conconully, Colville, Bonners Ferry, Stehekin, Kettle Falls, Rockford, Spokane, Sandpoint, Wauconda, Leavenworth, Newport, Mazama, Davenport, Priest River, Winthrop, Twisp, Deer Park, and Inchelium 1206 PM PDT Tue May 18 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM PDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 26 expected. * WHERE...Chewelah, Cheney, Tyler, Chattaroy, Republic, Curlew, Colville, Ione, Metaline Falls, Usk, Diamond Lake, Newport, Priest River, Priest Lake, Plain, Winthrop, Twisp, Mazama, Deer Park, Clayton, and Loon Lake. * WHEN...From 1 AM to 8 AM PDT Wednesday. * IMPACTS...Frost and freeze conditions could damage or kill sensitive plants. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ OTX
326 WWUS76 KOTX 191500 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 800 AM PDT Wed May 19 2021 IDZ001-WAZ035>038-042-191600- /O.EXP.KOTX.FZ.W.0001.000000T0000Z-210519T1500Z/ Northern Panhandle-Upper Columbia Basin-Spokane Area-Northeast Mountains-Okanogan Highlands-East Slopes Northern Cascades- Including the cities of Chewelah, Cheney, Rathdrum, Republic, Wilbur, Eastport, Conconully, Colville, Bonners Ferry, Stehekin, Odessa, Kettle Falls, Rockford, Coulee City, Spokane, Sandpoint, Wauconda, Leavenworth, Newport, Mazama, Davenport, Priest River, Grand Coulee, Winthrop, Twisp, Deer Park, Ritzville, and Inchelium 800 AM PDT Wed May 19 2021 ...FREEZE WARNING HAS EXPIRED... Temperatures this morning dipped below freezing across the northern Washington valleys and the valleys east of the Cascades. As of 8 am PDT most locations have warmed well above freezing and therefore the threat for freezing temperatures is over. $$ OTX
Nearby
Freeze Warnings in Washington, 2021Freeze Warnings in Idaho, 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.