Alert archive / California / Frost Advisories in 2018
Frost Advisory 37, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Dec 2, 2018, 11:42 AM PST for Del Norte County, California. It took effect at Dec 3, 2018, 12:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 2, 2018, 11:42 AM PST (19:42 UTC)
- In effect from
- Dec 3, 2018, 12:00 AM PST
- Expired
- Dec 2, 2018, 9:59 PM PST
- In force
- Issued by
- NWS Eureka, CA
County Del Norte County, CA
The radar
The Medford radar (KMAX), 109 km from the middle of the area, began a volume at 19:42 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, 7.7 hours before the alert went out and 118 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
- 590 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
154 WWUS76 KEKA 021942 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1142 AM PST Sun Dec 2 2018 CAZ102-103-109-112-030845- /O.UPG.KEKA.FZ.A.0004.181203T0800Z-181203T1700Z/ /O.NEW.KEKA.FZ.W.0016.181203T0800Z-181203T1700Z/ Del Norte Interior-Northern Humboldt Coast-Mendocino Coast- Southwestern Mendocino Interior- 1142 AM PST Sun Dec 2 2018 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST MONDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from midnight tonight to 9 AM PST Monday. The Freeze Watch is no longer in effect. * LOW TEMPERATURES...upper 20s to lower 30s. * LOCATIONS INCLUDE...Gasquet...Arcata...Eureka...Fortuna... ...Fort Bragg...Point Arena...Boonville...Comptche. * 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. && $$ CAZ101-030845- /O.UPG.KEKA.FZ.A.0004.181203T0800Z-181203T1700Z/ /O.NEW.KEKA.FR.Y.0037.181203T0800Z-181203T1700Z/ Coastal Del Norte- 1142 AM PST Sun Dec 2 2018 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST MONDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from midnight tonight to 9 AM PST Monday. The Freeze Watch is no longer in effect. * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Crescent City. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
1 follow-up statement
015 WWUS76 KEKA 030559 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 959 PM PST Sun Dec 2 2018 CAZ101-031700- /O.UPG.KEKA.FR.Y.0037.181203T0800Z-181203T1700Z/ /O.EXA.KEKA.FZ.W.0016.181203T0800Z-181203T1700Z/ Coastal Del Norte- 959 PM PST Sun Dec 2 2018 ...FREEZE WARNING IN EFFECT UNTIL 9 AM PST MONDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect until 9 AM PST Monday. The Frost Advisory is no longer in effect. * LOW TEMPERATURES...lower 30s. * LOCATIONS INCLUDE...Crescent City. * 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. && $$ CAZ102-103-109-112-031700- /O.CON.KEKA.FZ.W.0016.181203T0800Z-181203T1700Z/ Del Norte Interior-Northern Humboldt Coast-Mendocino Coast- Southwestern Mendocino Interior- 959 PM PST Sun Dec 2 2018 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY... * LOW TEMPERATURES...upper 20s to lower 30s. * LOCATIONS INCLUDE...Arcata...Eureka...Fortuna...Gasquet... Boonville...Comptche.... * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 2, 3:05 AM PST | Gale Watch | EKA | 12 hr | |
| Dec 2, 4:30 AM PST | Freeze Watch | EKA | Del Norte, Humboldt, Mendocino | 7 hr |
| Dec 2, 11:42 AM PST | Freeze Warning | EKA | Del Norte, Humboldt, Mendocino | 21 hr |
| Dec 2, 2:54 PM PST | Gale Warning | EKA | 54 hr | |
| Dec 2, 2:54 PM PST | Small Craft Advisory | EKA | 33 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.