Alert archive / California / Frost Advisories in 2019
Frost Advisory 13, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at May 1, 2019, 8:45 PM PDT for Del Norte County, Humboldt County, Trinity County, California. It took effect at May 2, 2019, 2:00 AM PDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 1, 2019, 8:45 PM PDT (03:45 UTC)
- In effect from
- May 2, 2019, 2:00 AM PDT
- Expired
- May 2, 2019, 9:00 AM PDT
- In force
- 7 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 80 km from the middle of the area, began a volume at 03:46 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, 3.8 hours before the alert went out and 165 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
- 3425 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
750 WWUS76 KEKA 020345 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 845 PM PDT Wed May 1 2019 CAZ106>108-021500- /O.NEW.KEKA.FR.Y.0013.190502T0900Z-190502T1500Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- 845 PM PDT Wed May 1 2019 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM PDT THURSDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 2 AM to 8 AM PDT Thursday. * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Hayfork, Ruth, Dinsmore, and Douglas City. * 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. && $$
1 follow-up statement
582 WWUS76 KEKA 021231 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 531 AM PDT Thu May 2 2019 CAZ102-104-105-021600- /O.EXB.KEKA.FR.Y.0013.000000T0000Z-190502T1600Z/ Del Norte Interior-Southwestern Humboldt- Northern Humboldt Interior- 531 AM PDT Thu May 2 2019 ...FROST ADVISORY IN EFFECT UNTIL 9 AM PDT THIS MORNING... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect until 9 AM PDT this morning. * LOW TEMPERATURES...low to mid 30s. * LOCATIONS INCLUDE...Gasquet, Petrolia, Honeydew, Orleans, Willow Creek, Humboldt Redwoods. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ106>108-021600- /O.EXT.KEKA.FR.Y.0013.000000T0000Z-190502T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- 531 AM PDT Thu May 2 2019 ...FROST ADVISORY NOW IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Hayfork, Ruth, Weaverville, Trinity Center, Garberville, Larabee Valley. * 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 |
|---|---|---|---|---|
| May 2, 1:57 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Trinity | 18 hr |
Nearby
Frost Advisories in California, 2019Every frost advisory in 2019
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.