Alert archive / California / Frost Advisories in 2017
Frost Advisory 18, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Oct 1, 2017, 3:22 PM PDT for Humboldt County, Trinity County, California. It took effect at Oct 2, 2017, 12:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 1, 2017, 3:22 PM PDT (22:22 UTC)
- In effect from
- Oct 2, 2017, 12:00 AM PDT
- Expired
- Oct 2, 2017, 8:00 AM PDT
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
Counties Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 69 km from the middle of the area, began a volume at 22:24 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, 10.4 hours before the alert went out and 197 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
- 3 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 87 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
970 WWUS76 KEKA 012222 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 322 PM PDT Sun Oct 1 2017 CAZ105>108-021500- /O.NEW.KEKA.FR.Y.0018.171002T0700Z-171002T1500Z/ Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity- 322 PM PDT Sun Oct 1 2017 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM MONDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from midnight tonight to 8 AM Monday. * LOCATIONS INCLUDE...Orleans...Willow Creek...Burnt Ranch...Hayfork. * 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. $$
1 follow-up statement
522 WWUS76 KEKA 020914 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 214 AM PDT Mon Oct 2 2017 CAZ105>108-021500- /O.CON.KEKA.FR.Y.0018.000000T0000Z-171002T1500Z/ Northern Humboldt Interior-Southern Humboldt Interior- Northern Trinity-Southern Trinity- 214 AM PDT Mon Oct 2 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * LOCATIONS INCLUDE...Hayfork...Ruth...Orleans...Willow Creek...Weaverville...Burnt Ranch...Trinity Center... Garberville...Bridgeville. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 1, 3:05 AM PDT | Fire Weather Watch | EKA | 30 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.