Alert archive / California / Frost Advisories in 2020
Frost Advisory 3, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Mar 3, 2020, 4:45 AM PST for Mendocino County, California. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Mar 3, 2020, 4:45 AM PST (12:45 UTC)
- Expired
- Mar 3, 2020, 9:00 AM PST
- In force
- 4 hr
- Issued by
- NWS Eureka, CA
County Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 139 km from the middle of the area, began a volume at 12:44 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
Oakland, CA (KOAK), launched 12:00Z, 0.8 hours before the alert went out and 218 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
- 2351 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- -23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
696 WWUS76 KEKA 031245 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 445 AM PST Tue Mar 3 2020 CAZ110>113-031700- /O.NEW.KEKA.FR.Y.0003.200303T1245Z-200303T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 445 AM PST Tue Mar 3 2020 ...FROST ADVISORY IN EFFECT UNTIL 9 AM PST THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Low lying wind-protected valleys of interior Mendocino County. Includes Willits, Boonville, Potter Valley, Covelo, Leggett, Laytonville, Ukiah, Hopland. * WHEN...Until 9 AM PST this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
1 follow-up statement
853 WWUS76 KEKA 031700 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 900 AM PST Tue Mar 3 2020 CAZ110>113-031800- /O.EXP.KEKA.FR.Y.0003.000000T0000Z-200303T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 900 AM PST Tue Mar 3 2020 ...FROST ADVISORY WILL EXPIRE AT 9 AM PST THIS MORNING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 3, 1:33 PM PST | Frost Advisory | EKA | Lake, Mendocino | 19 hr |
| Mar 3, 3:12 PM PST | Hazardous Seas Warning | EKA | 15 hr |
Nearby
Frost Advisories in California, 2020Every frost advisory 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; radar from the NEXRAD Level II archive.