Alert archive / California / Freeze Warnings in 2018
Freeze Warning 1, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Mar 5, 2018, 1:18 AM PST for Mendocino County, California. 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 5, 2018, 1:18 AM PST (09:18 UTC)
- Expired
- Mar 5, 2018, 9:00 AM PST
- In force
- 8 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 09:23 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 00:00Z, 9.3 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
- 1629 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
597 WWUS76 KEKA 050918 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 118 AM PST Mon Mar 5 2018 CAZ110>113-051700- /O.UPG.KEKA.FR.Y.0001.000000T0000Z-180305T1700Z/ /O.NEW.KEKA.FZ.W.0001.180305T0918Z-180305T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 118 AM PST Mon Mar 5 2018 ...FREEZE WARNING IN EFFECT UNTIL 9 AM PST THIS MORNING... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect until 9 AM PST this morning. The Frost Advisory is no longer in effect. * LOW TEMPERATURES...Upper 20S to lower 30S. * LOCATIONS INCLUDE...Leggett...Laytonville...Willits... Covelo...Boonville...Comptche...Potter Valley...Ukiah. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ CAZ101-103-109-051700- /O.CON.KEKA.FR.Y.0001.000000T0000Z-180305T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 118 AM PST Mon Mar 5 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... * LOCATIONS INCLUDE...Fort Bragg...Point Arena...Crescent City...Arcata...Eureka...Fortuna. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
1 follow-up statement
261 WWUS76 KEKA 051651 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 851 AM PST Mon Mar 5 2018 CAZ110>113-051800- /O.EXP.KEKA.FZ.W.0001.000000T0000Z-180305T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 851 AM PST Mon Mar 5 2018 ...FREEZE WARNING WILL EXPIRE AT 9 AM PST THIS MORNING... $$ CAZ101-103-109-051800- /O.EXP.KEKA.FR.Y.0001.000000T0000Z-180305T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 851 AM PST Mon Mar 5 2018 ...FROST ADVISORY WILL EXPIRE AT 9 AM PST THIS MORNING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 5, 2:26 AM PST | Small Craft Advisory | EKA | 4 days | |
| Mar 5, 2:26 PM PST | Frost Advisory | EKA | Mendocino | 19 hr |
Nearby
Freeze Warnings in California, 2018Every freeze warning in 2018
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.