Alert archive / Washington / Frost Advisories in 2021
Frost Advisory 4, NWS Spokane, WA
NWS Spokane, WA issued this frost advisory at Oct 7, 2021, 2:27 AM PDT for Adams County, Grant County, Washington. It took effect at Oct 8, 2021, 4:00 AM PDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Oct 7, 2021, 2:27 AM PDT (09:27 UTC)
- In effect from
- Oct 8, 2021, 4:00 AM PDT
- Expired
- Oct 8, 2021, 9:00 AM PDT
- In force
- 5 hr
- Issued by
- NWS Spokane, WA
Counties Adams County, WA, Grant County, WA
The radar
The Spokane radar (KOTX), 123 km from the middle of the area, began a volume at 09:26 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, 9.5 hours before the alert went out and 207 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
- 1750 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
050 WWUS76 KOTX 070927 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 227 AM PDT Thu Oct 7 2021 WAZ034-071730- /O.NEW.KOTX.FR.Y.0004.211008T1100Z-211008T1600Z/ Moses Lake Area- Including the cities of Ephrata, Moses Lake, Othello, Quincy, and Winchester 227 AM PDT Thu Oct 7 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM PDT FRIDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Ephrata, Moses Lake, Othello, Quincy, and Winchester. * WHEN...From 4 AM to 9 AM PDT Friday. * 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. && $$
3 follow-up statements
047 WWUS76 KOTX 071720 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 1020 AM PDT Thu Oct 7 2021 WAZ034-081400- /O.CON.KOTX.FR.Y.0004.211008T1100Z-211008T1600Z/ Moses Lake Area- Including the cities of Ephrata, Moses Lake, Othello, Quincy, and Winchester 1020 AM PDT Thu Oct 7 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 9 AM PDT FRIDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Ephrata, Moses Lake, Othello, Quincy, and Winchester. * WHEN...From 4 AM to 9 AM PDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CD
496 WWUS76 KOTX 081328 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 628 AM PDT Fri Oct 8 2021 WAZ034-081600- /O.CON.KOTX.FR.Y.0004.000000T0000Z-211008T1600Z/ Moses Lake Area- Including the cities of Ephrata, Moses Lake, Othello, Quincy, and Winchester 628 AM PDT Fri Oct 8 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Ephrata, Moses Lake, Othello, Quincy, and Winchester. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. $$ JCLEV
189 WWUS76 KOTX 081556 NPWOTX URGENT - WEATHER MESSAGE National Weather Service Spokane WA 856 AM PDT Fri Oct 8 2021 WAZ034-081700- /O.EXP.KOTX.FR.Y.0004.000000T0000Z-211008T1600Z/ Moses Lake Area- Including the cities of Ephrata, Moses Lake, Othello, Quincy, and Winchester 856 AM PDT Fri Oct 8 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... Early morning temperatures are warming above freezing and frost conditions as of mid morning. Since we've now seen a few days of near or freezing temperatures, the trend will continue that the region will see occasional freezing temperatures overnight going into the week ahead. Freezing and frost like temperatures will be more common going through the Fall season. $$ CD
Nearby
Frost Advisories in Washington, 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.