Alert archive / Washington / Frost Advisories in 2021
Frost Advisory 5, NWS Spokane, WA
NWS Spokane, WA issued this frost advisory at Oct 11, 2021, 2:01 AM PDT for Asotin County, Garfield County, Washington; Nez Perce County, Idaho. It took effect at Oct 12, 2021, 3:00 AM PDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Oct 11, 2021, 2:01 AM PDT (09:01 UTC)
- In effect from
- Oct 12, 2021, 3:00 AM PDT
- Expired
- Oct 12, 2021, 9:00 AM PDT
- In force
- 6 hr
- Issued by
- NWS Spokane, WA
Counties Nez Perce County, ID, Asotin County, WA, Garfield County, WA
The radar
The Pendleton radar (KPDT), 148 km from the middle of the area, began a volume at 09:04 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, 9.0 hours before the alert went out and 164 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2762 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
857 WWUS76 KOTX 110901 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 201 AM PDT Mon Oct 11 2021 WAZ041-120200- /O.NEW.KOTX.FZ.W.0003.211012T1000Z-211012T1600Z/ Wenatchee Area- Including the cities of Cashmere, Chelan, Entiat, and Wenatchee 201 AM PDT Mon Oct 11 2021 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Cashmere, Chelan, Entiat, and Wenatchee. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IDZ026-WAZ032-120200- /O.NEW.KOTX.FR.Y.0005.211012T1000Z-211012T1600Z/ Lewiston Area-Lower Garfield and Asotin Counties- Including the cities of Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston 201 AM PDT Mon Oct 11 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Temperatures as low as 26 will result in frost formation. * WHERE...Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ FX
3 follow-up statements
735 WWUS76 KOTX 110904 CCA NPWOTX URGENT - WEATHER MESSAGE...CORRECTED National Weather Service Spokane WA 204 AM PDT Mon Oct 11 2021 WAZ041-120215- /O.COR.KOTX.FZ.W.0003.211012T1000Z-211012T1600Z/ Wenatchee Area- Including the cities of Cashmere, Chelan, Entiat, and Wenatchee 204 AM PDT Mon Oct 11 2021 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as the upper 20s. * WHERE...Cashmere, Chelan, Entiat, and Wenatchee. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IDZ026-WAZ032-120215- /O.COR.KOTX.FR.Y.0005.211012T1000Z-211012T1600Z/ Lewiston Area-Lower Garfield and Asotin Counties- Including the cities of Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston 204 AM PDT Mon Oct 11 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ FX
464 WWUS76 KOTX 112252 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 352 PM PDT Mon Oct 11 2021 WAZ041-121600- /O.CON.KOTX.FZ.W.0003.211012T1000Z-211012T1600Z/ Wenatchee Area- Including the cities of Cashmere, Chelan, Entiat, and Wenatchee 352 PM PDT Mon Oct 11 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as the upper 20s. * WHERE...Cashmere, Chelan, Entiat, and Wenatchee. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IDZ026-WAZ032-121600- /O.CON.KOTX.FR.Y.0005.211012T1000Z-211012T1600Z/ Lewiston Area-Lower Garfield and Asotin Counties- Including the cities of Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston 352 PM PDT Mon Oct 11 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Temperatures as low as near 30 will result in frost formation. * WHERE...Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ OTX
083 WWUS76 KOTX 121557 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 857 AM PDT Tue Oct 12 2021 WAZ041-121700- /O.EXP.KOTX.FZ.W.0003.000000T0000Z-211012T1600Z/ Wenatchee Area- Including the cities of Cashmere, Chelan, Entiat, and Wenatchee 857 AM PDT Tue Oct 12 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... The threat is ending as temperatures will gradually warm up this morning. $$ IDZ026-WAZ032-121700- /O.EXP.KOTX.FR.Y.0005.000000T0000Z-211012T1600Z/ Lewiston Area-Lower Garfield and Asotin Counties- Including the cities of Peck, Clarkston, Pomeroy, Gifford, Clarkston Heights, Lapwai, Culdesac, and Lewiston 857 AM PDT Tue Oct 12 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... The threat is ending as temperatures will gradually warm up this morning. $$ OTX
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 2:01 AM PDT | Freeze Warning | OTX | Chelan, Douglas | 31 hr |
Nearby
Frost Advisories in Washington, 2021Frost Advisories in Idaho, 2021Every frost 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.