Alert archive / California / Frost Advisories in 2018
Frost Advisory 39, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Dec 6, 2018, 2:15 PM PST for Del Norte County, Humboldt County, California. It took effect at Dec 7, 2018, 12:00 AM PST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Dec 6, 2018, 2:15 PM PST (22:15 UTC)
- In effect from
- Dec 7, 2018, 12:00 AM PST
- Expired
- Dec 7, 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 22:17 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, 10.3 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
- 1147 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- -17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
360 WWUS76 KEKA 062215 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 215 PM PST Thu Dec 6 2018 CAZ102-103-071115- /O.NEW.KEKA.FR.Y.0039.181207T0800Z-181207T1700Z/ Del Norte Interior-Northern Humboldt Coast- 215 PM PST Thu Dec 6 2018 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST FRIDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from midnight tonight to 9 AM PST Friday. * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Areas away from the immediate coast in Arcata, Blue Lake, Fortuna, and Gasquet. * 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. && $$
2 follow-up statements
430 WWUS76 KEKA 070555 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 955 PM PST Thu Dec 6 2018 CAZ102-103-071700- /O.CON.KEKA.FR.Y.0039.181207T0800Z-181207T1700Z/ Del Norte Interior-Northern Humboldt Coast- 955 PM PST Thu Dec 6 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST FRIDAY... * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Arcata...Eureka...Fortuna...Gasquet. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
536 WWUS76 KEKA 071700 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 900 AM PST Fri Dec 7 2018 CAZ102-103-071800- /O.EXP.KEKA.FR.Y.0039.000000T0000Z-181207T1700Z/ Del Norte Interior-Northern Humboldt Coast- 900 AM PST Fri Dec 7 2018 ...FROST ADVISORY WILL EXPIRE AT 9 AM PST THIS MORNING... $$
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.