Alert archive / California / Frost Advisories in 2017
Frost Advisory 9, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Apr 14, 2017, 7:11 PM PDT for 4 counties in California. It took effect at Apr 15, 2017, 3:00 AM PDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Apr 14, 2017, 7:11 PM PDT (02:11 UTC)
- In effect from
- Apr 15, 2017, 3:00 AM PDT
- Expired
- Apr 15, 2017, 8:00 AM PDT
- In force
- 5 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 60 km from the middle of the area, began a volume at 02:12 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 00:00Z, 2.2 hours before the alert went out and 204 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
- 79 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1698 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
158 WWUS76 KEKA 150211 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 711 PM PDT Fri Apr 14 2017 CAZ101>106-109>113-151500- /O.NEW.KEKA.FR.Y.0009.170415T1000Z-170415T1500Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 711 PM PDT Fri Apr 14 2017 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM PDT SATURDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 3 AM to 8 AM PDT Saturday. * LOCATIONS INCLUDE...Crescent City...Gasquet...Arcata... Eureka...Fortuna...Patrolia...Honeydew...Ettersberg... Willow Creek...Orleans...Garberville...Bridgeville... Fort Bragg... Point Arena...Leggett...Laytonville...Willits...Covelo... Boonville...Comptche...Ukiah...Hopland. * LOW TEMPERATURES...33 to 36. * 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. && $$
1 follow-up statement
513 WWUS76 KEKA 150517 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1017 PM PDT Fri Apr 14 2017 CAZ107-108-151500- /O.EXA.KEKA.FR.Y.0009.170415T1000Z-170415T1500Z/ Northern Trinity-Southern Trinity- 1017 PM PDT Fri Apr 14 2017 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM PDT SATURDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 3 AM to 8 AM PDT Saturday. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth. * LOW TEMPERATURES...31 to 35. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ101>106-109>113-151500- /O.CON.KEKA.FR.Y.0009.170415T1000Z-170415T1500Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 1017 PM PDT Fri Apr 14 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM PDT SATURDAY... * LOCATIONS INCLUDE...Crescent City...Gasquet...Arcata... Eureka...Fortuna...Patrolia...Honeydew...Ettersberg... Willow Creek...Orleans...Garberville...Bridgeville... Fort Bragg... Point Arena...Leggett...Laytonville...Willits...Covelo... Boonville...Comptche...Ukiah...Hopland. * LOW TEMPERATURES...33 to 36. * 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 |
|---|---|---|---|---|
| Apr 15, 2:02 PM PDT | Small Craft Advisory | EKA | 56 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.