Alert archive / California / Freeze Warnings in 2017
Freeze Warning 9, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Oct 13, 2017, 12:55 PM PDT for Trinity County, California. It took effect at Oct 14, 2017, 1:00 AM PDT. It was in force for 8 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
- Oct 13, 2017, 12:55 PM PDT (19:55 UTC)
- In effect from
- Oct 14, 2017, 1:00 AM PDT
- Expired
- Oct 14, 2017, 9:00 AM PDT
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 19:56 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, 7.9 hours before the alert went out and 193 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
- 878 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
577 WWUS76 KEKA 131955 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1255 PM PDT Fri Oct 13 2017 CAZ108-141600- /O.NEW.KEKA.FZ.W.0009.171014T0800Z-171014T1600Z/ Southern Trinity- 1255 PM PDT Fri Oct 13 2017 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM PDT SATURDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from 1 AM to 9 AM PDT Saturday. * LOW TEMPERATURES...Upper 20s to lower 30s. * LOCATIONS INCLUDE...Hayfork...Ruth. * 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. && $$ CAZ102-105>107-110-111-141600- /O.NEW.KEKA.FR.Y.0025.171014T0800Z-171014T1600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- 1255 PM PDT Fri Oct 13 2017 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT SATURDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 9 AM PDT Saturday. * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Gasquet...Orleans...Willow Creek... Garberville...Bridgeville...Weaverville...Burnt Ranch...Trinity Center...Leggett...Laytonville...Willits...Covelo...and other wind- sheltered valleys. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
1 follow-up statement
490 WWUS76 KEKA 141601 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 901 AM PDT Sat Oct 14 2017 CAZ108-141715- /O.EXP.KEKA.FZ.W.0009.000000T0000Z-171014T1600Z/ Southern Trinity- 901 AM PDT Sat Oct 14 2017 ...FREEZE WARNING HAS EXPIRED... Temperatures will rapidly warm above freezing over the next hour. $$ CAZ102-105>107-110-111-141715- /O.EXP.KEKA.FR.Y.0025.000000T0000Z-171014T1600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- 901 AM PDT Sat Oct 14 2017 ...FROST ADVISORY HAS EXPIRED... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 11:18 AM PDT | Red Flag Warning | EKA | 34 hr | |
| Oct 13, 12:55 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 20 hr |
Nearby
Freeze Warnings in California, 2017Every freeze warning 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.