Alert archive / California / Frost Advisories in 2017
Frost Advisory 5, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Mar 27, 2017, 3:43 PM PDT for Mendocino County, California. It took effect at Mar 28, 2017, 1:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Mar 27, 2017, 3:43 PM PDT (22:43 UTC)
- In effect from
- Mar 28, 2017, 1:00 AM PDT
- Expired
- Mar 28, 2017, 9:00 AM PDT
- 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 22:40 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, 10.7 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
- 1099 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
344 WWUS76 KEKA 272243 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 343 PM PDT Mon Mar 27 2017 CAZ110-113-281145- /O.NEW.KEKA.FR.Y.0005.170328T0800Z-170328T1600Z/ Northwestern Mendocino Interior-Southeastern Mendocino Interior- 343 PM PDT Mon Mar 27 2017 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT TUESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 9 AM PDT Tuesday. * LOCATIONS INCLUDE...Interior valleys of Mendocino County. * 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. && $$
2 follow-up statements
196 WWUS76 KEKA 280016 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 516 PM PDT Mon Mar 27 2017 ...High pressure, calm winds and clear skies will bring frost tonight... .Temperatures in the interior valleys away from the coast are expected to drop into the mid 30s which will allow frost to form in some areas. CAZ111-281315- /O.EXA.KEKA.FR.Y.0005.170328T0800Z-170328T1600Z/ Northeastern Mendocino Interior- 516 PM PDT Mon Mar 27 2017 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT TUESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 9 AM PDT Tuesday. * LOCATIONS INCLUDE...Covelo and other valleys in northeast Mendocino county. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ110-113-281315- /O.CON.KEKA.FR.Y.0005.170328T0800Z-170328T1600Z/ Northwestern Mendocino Interior-Southeastern Mendocino Interior- 516 PM PDT Mon Mar 27 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT TUESDAY... * LOCATIONS INCLUDE...Hopland...Leggett... Laytonville... Willits...Potter Valley and other outlying valleys in Mendocino county. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
857 WWUS76 KEKA 281006 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 306 AM PDT Tue Mar 28 2017 CAZ110-111-113-281600- /O.CON.KEKA.FR.Y.0005.000000T0000Z-170328T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior- 306 AM PDT Tue Mar 28 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOCATIONS INCLUDE...Leggett... Laytonville... Willits...Potter Valley and Covelo. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 8:20 PM PDT | Small Craft Advisory | EKA | 7 days |
Nearby
Frost Advisories in California, 2017Every frost advisory in 2017
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.