Alert archive / California / Frost Advisories in 2017
Frost Advisory 12, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at May 13, 2017, 1:53 PM PDT for Mendocino County, Trinity County, California. It took effect at May 14, 2017, 3:00 AM PDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- May 13, 2017, 1:53 PM PDT (20:53 UTC)
- In effect from
- May 14, 2017, 3:00 AM PDT
- Expired
- May 14, 2017, 8:00 AM PDT
- In force
- 5 hr
- Issued by
- NWS Eureka, CA
Counties Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 100 km from the middle of the area, began a volume at 20:53 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
Medford/Jackson, OR (KMFR), launched 12:00Z, 8.9 hours before the alert went out and 262 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
- 863 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
625 WWUS76 KEKA 132053 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 153 PM PDT Sat May 13 2017 CAZ107-108-110-111-141000- /O.NEW.KEKA.FR.Y.0012.170514T1000Z-170514T1500Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 153 PM PDT Sat May 13 2017 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM PDT SUNDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 3 AM to 8 AM PDT Sunday. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth...Laytonville...Willits... 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. && $$
4 follow-up statements
804 WWUS76 KEKA 141000 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 300 AM PDT Sun May 14 2017 CAZ107-108-110-111-141500- /O.CON.KEKA.FR.Y.0012.000000T0000Z-170514T1500Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 300 AM PDT Sun May 14 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * LOCATIONS INCLUDE...Hayfork...Ruth...Leggett...Laytonville... Willits...Covelo...Weaverville...Burnt Ranch...Trinity Center. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
044 WWUS76 KEKA 141012 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 312 AM PDT Sun May 14 2017 CAZ107-108-110-111-141500- /O.CON.KEKA.FR.Y.0012.000000T0000Z-170514T1500Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 312 AM PDT Sun May 14 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * LOCATIONS INCLUDE....Hayfork...Ruth...Leggett...Laytonville... Willits...Covelo...Weaverville...Burnt ...Ranch...Trinity Center. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered $$
691 WWUS76 KEKA 141030 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 330 AM PDT Sun May 14 2017 CAZ107-108-110-111-141500- /O.CON.KEKA.FR.Y.0012.000000T0000Z-170514T1500Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 330 AM PDT Sun May 14 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * LOCATIONS INCLUDE...Hayfork...Ruth...Leggett...Laytonville... Willits...Covelo...Weaverville...Burnt Ranch...Trinity Center. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. $$
825 WWUS76 KEKA 141501 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 801 AM PDT Sun May 14 2017 CAZ107-108-110-111-141615- /O.EXP.KEKA.FR.Y.0012.000000T0000Z-170514T1500Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 801 AM PDT Sun May 14 2017 ...FROST ADVISORY HAS EXPIRED... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 2:33 PM PDT | Small Craft Advisory | EKA | 6 hr |
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.