Alert archive / California / Freeze Warnings in 2018
Freeze Warning 3, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Mar 18, 2018, 2:03 PM PDT for Mendocino County, California. It took effect at Mar 19, 2018, 2:00 AM PDT. It was in force for 7 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 18, 2018, 2:03 PM PDT (21:03 UTC)
- In effect from
- Mar 19, 2018, 2:00 AM PDT
- Expired
- Mar 19, 2018, 9:00 AM PDT
- In force
- 7 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 21:07 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, 9.1 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
- 856 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
645 WWUS76 KEKA 182103 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 203 PM PDT Sun Mar 18 2018 CAZ111-191015- /O.NEW.KEKA.FZ.W.0003.180319T0900Z-180319T1600Z/ Northeastern Mendocino Interior- 203 PM PDT Sun Mar 18 2018 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from 2 AM to 9 AM PDT Monday. * LOW TEMPERATURES...upper 20S to lower 30S. * LOCATIONS INCLUDE...Covelo. * 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. && $$ CAZ110-113-191015- /O.NEW.KEKA.FR.Y.0005.180319T0900Z-180319T1600Z/ Northwestern Mendocino Interior-Southeastern Mendocino Interior- 203 PM PDT Sun Mar 18 2018 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 2 AM to 9 AM PDT Monday. * LOW TEMPERATURES...lower to mid 30S. * LOCATIONS INCLUDE...Leggett...Laytonville...Willits... Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
1 follow-up statement
598 WWUS76 KEKA 191010 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 310 AM PDT Mon Mar 19 2018 CAZ111-191600- /O.CON.KEKA.FZ.W.0003.000000T0000Z-180319T1600Z/ Northeastern Mendocino Interior- 310 AM PDT Mon Mar 19 2018 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOW TEMPERATURES...upper 20S to lower 30S. * LOCATIONS INCLUDE...Covelo. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ110-113-191600- /O.CON.KEKA.FR.Y.0005.000000T0000Z-180319T1600Z/ Northwestern Mendocino Interior-Southeastern Mendocino Interior- 310 AM PDT Mon Mar 19 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOW TEMPERATURES...lower to mid 30S. * LOCATIONS INCLUDE...Leggett...Laytonville...Willits... Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 2:03 PM PDT | 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.