Alert archive / California / Freeze Warnings in 2020
Freeze Warning 3, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Mar 7, 2020, 2:17 PM PST for Lake County, Mendocino County, California. It took effect at Mar 8, 2020, 1:00 AM PST. It was in force for 8 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
- Mar 7, 2020, 2:17 PM PST (22:17 UTC)
- In effect from
- Mar 8, 2020, 1:00 AM PST
- Expired
- Mar 8, 2020, 10:00 AM PDT
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
Counties Lake County, CA, Mendocino County, CA
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 10.3 hours before the alert went out and 188 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
- 798 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- -50 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
918 WWUS76 KEKA 072217 CCA NPWEKA URGENT - WEATHER MESSAGE...CORRECTED National Weather Service Eureka CA 217 PM PST Sat Mar 7 2020 CAZ109-072315- /O.CAN.KEKA.FZ.A.0002.200308T0900Z-200308T1700Z/ Mendocino Coast- 217 PM PST Sat Mar 7 2020 ...FREEZE WATCH IS CANCELLED... The Freeze Watch has been replaced by A Frost Advisory for portions of southern Mendocino and southern Lake Counties, and a Freeze Warning for portions of northern Mendocino and northern Lake counties. $$ CAZ110-111-114-080615- /O.UPG.KEKA.FZ.A.0002.200308T0900Z-200308T1700Z/ /O.NEW.KEKA.FZ.W.0003.200308T0900Z-200308T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 217 PM PST Sat Mar 7 2020 ...FREEZE WARNING IN EFFECT FROM 1 AM PST TO 10 AM PDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Wind protected valleys of interior northern Mendocino and northern Lake counties. Includes Willits, Covelo, Potter Valley, Lake Pillsbury, and other low lying areas. * WHEN...From 1 AM PST to 10 AM PDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ CAZ112-113-115-080615- /O.UPG.KEKA.FZ.A.0002.200308T0900Z-200308T1700Z/ /O.COR.KEKA.FR.Y.0006.200308T0900Z-200308T1700Z/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 217 PM PST Sat Mar 7 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM PST TO 10 AM PDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Protected valleys of southern interior Mendocino and southern Lake counties. Includes Boonville, Hopland, Ukiah, Lakeport, Kelseyville, Middletown, and other areas. * WHEN...From 1 AM PST to 10 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
3 follow-up statements
448 WWUS76 KEKA 080403 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 803 PM PST Sat Mar 7 2020 CAZ110-111-114-081215- /O.CON.KEKA.FZ.W.0003.200308T0900Z-200308T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 803 PM PST Sat Mar 7 2020 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM PST TO 10 AM PDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Wind protected valleys of interior northern Mendocino and northern Lake counties. Includes Willits, Covelo, Potter Valley, Lake Pillsbury, and other low lying areas. * WHEN...From 1 AM PST to 10 AM PDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ CAZ112-113-115-081215- /O.CON.KEKA.FR.Y.0006.200308T0900Z-200308T1700Z/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 803 PM PST Sat Mar 7 2020 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM PST TO 10 AM PDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Protected valleys of southern interior Mendocino and southern Lake counties. Includes Boonville, Hopland, Ukiah, Lakeport, Kelseyville, Middletown, and other areas. * WHEN...From 1 AM PST to 10 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
779 WWUS76 KEKA 081053 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 353 AM PDT Sun Mar 8 2020 CAZ110-111-114-081700- /O.CON.KEKA.FZ.W.0003.000000T0000Z-200308T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 353 AM PDT Sun Mar 8 2020 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Wind protected valleys of interior northern Mendocino and northern Lake counties. Includes Willits, Covelo, Potter Valley, Lake Pillsbury, and other low lying areas. * WHEN...From 1 AM PST to 10 AM PDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ CAZ112-113-115-081700- /O.CON.KEKA.FR.Y.0006.000000T0000Z-200308T1700Z/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 353 AM PDT Sun Mar 8 2020 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Protected valleys of southern interior Mendocino and southern Lake counties. Includes Boonville, Hopland, Ukiah, Lakeport, Kelseyville, Middletown, and other areas. * WHEN...From 1 AM PST to 10 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
618 WWUS76 KEKA 081648 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 948 AM PDT Sun Mar 8 2020 CAZ110-111-114-081800- /O.EXP.KEKA.FZ.W.0003.000000T0000Z-200308T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 948 AM PDT Sun Mar 8 2020 ...FREEZE WARNING WILL EXPIRE AT 10 AM PDT THIS MORNING... While some areas remain near or slightly below freezing as of 9:45 AM, temperatures have begun to rise, and will continue to do so quickly during the late morning hours. $$ CAZ112-113-115-081800- /O.EXP.KEKA.FR.Y.0006.000000T0000Z-200308T1700Z/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 948 AM PDT Sun Mar 8 2020 ...FROST ADVISORY WILL EXPIRE AT 10 AM PDT THIS MORNING... While some areas remain in the upper 30s as of 9:45 AM, temperatures have begun to rise, and will continue to do so quickly during the late morning hours. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 6, 5:10 PM PST | Freeze Watch | EKA | Lake, Mendocino | 21 hr |
| Mar 7, 2:10 PM PST | Frost Advisory | EKA | Mendocino | 19 hr |
Nearby
Freeze Warnings in California, 2020Every freeze warning in 2020
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.