Alert archive / California / Frost Advisories in 2018
Frost Advisory 38, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Dec 5, 2018, 2:56 PM PST for Del Norte County, Humboldt County, California. It took effect at Dec 6, 2018, 12:00 AM PST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Dec 5, 2018, 2:56 PM PST (22:56 UTC)
- In effect from
- Dec 6, 2018, 12:00 AM PST
- Expired
- Dec 6, 2018, 9:00 AM PST
- In force
- 9 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 86 km from the middle of the area, began a volume at 22:56 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, 10.9 hours before the alert went out and 158 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
- 1220 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
677 WWUS76 KEKA 052256 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 256 PM PST Wed Dec 5 2018 CAZ101>103-061200- /O.NEW.KEKA.FR.Y.0038.181206T0800Z-181206T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- 256 PM PST Wed Dec 5 2018 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from midnight tonight to 9 AM PST Thursday. * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Areas away from the immediate coast in Crescent City, Gasquet, Arcata, Eureka, and Fortuna. * 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. && $$
2 follow-up statements
502 WWUS76 KEKA 061145 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 345 AM PST Thu Dec 6 2018 CAZ101>103-061700- /O.CON.KEKA.FR.Y.0038.000000T0000Z-181206T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- 345 AM PST Thu Dec 6 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Areas away from the immediate coast in Crescent City, Gasquet, Arcata, Eureka, and Fortuna. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. $$
721 WWUS76 KEKA 061645 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 845 AM PST Thu Dec 6 2018 CAZ101>103-061745- /O.EXP.KEKA.FR.Y.0038.000000T0000Z-181206T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- 845 AM PST Thu Dec 6 2018 ...FROST ADVISORY WILL EXPIRE AT 9 AM PST THIS MORNING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 5, 3:18 AM PST | Small Craft Advisory | EKA | 6 hr | |
| Dec 5, 3:18 AM PST | Small Craft Advisory | EKA | 48 hr |
Nearby
Frost Advisories in California, 2018Every frost advisory in 2018
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.