Alert archive / California / Frost Advisories in 2017
Frost Advisory 26, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Oct 14, 2017, 3:53 PM PDT for Mendocino County, California. It took effect at Oct 15, 2017, 4:00 AM PDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Oct 14, 2017, 3:53 PM PDT (22:53 UTC)
- In effect from
- Oct 15, 2017, 4:00 AM PDT
- Expired
- Oct 15, 2017, 9:00 AM PDT
- In force
- 5 hr
- Issued by
- NWS Eureka, CA
County Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 139 km from the middle of the area, began a volume at 22:55 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
Oakland, CA (KOAK), launched 12:00Z, 10.9 hours before the alert went out and 218 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
- 2556 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
997 WWUS76 KEKA 142253 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 353 PM PDT Sat Oct 14 2017 CAZ108-151200- /O.NEW.KEKA.FZ.W.0010.171015T1100Z-171015T1600Z/ Southern Trinity- 353 PM PDT Sat Oct 14 2017 ...FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM PDT SUNDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from 4 AM to 9 AM PDT Sunday. * LOW TEMPERATURES...Near 30 degrees. * 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. && $$ CAZ107-111-151200- /O.NEW.KEKA.FR.Y.0026.171015T1100Z-171015T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 353 PM PDT Sat Oct 14 2017 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM PDT SUNDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 4 AM to 9 AM PDT Sunday. * LOW TEMPERATURES...Mid 30s. * LOCATIONS INCLUDE...Weaverville...Trinity Center...Covelo. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
1 follow-up statement
245 WWUS76 KEKA 151033 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 333 AM PDT Sun Oct 15 2017 CAZ108-151600- /O.CON.KEKA.FZ.W.0010.171015T1100Z-171015T1600Z/ Southern Trinity- 333 AM PDT Sun Oct 15 2017 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOW TEMPERATURES...Near 30 degrees. * LOCATIONS INCLUDE...Hayfork...Ruth. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ107-111-151600- /O.CON.KEKA.FR.Y.0026.171015T1100Z-171015T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 333 AM PDT Sun Oct 15 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOW TEMPERATURES...Mid 30s. * LOCATIONS INCLUDE...Weaverville...Trinity Center...Covelo. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 8:40 PM PDT | Gale Warning | EKA | 21 hr | |
| Oct 13, 8:40 PM PDT | Small Craft Advisory | EKA | 21 hr | |
| Oct 14, 3:53 PM PDT | Freeze Warning | EKA | Trinity | 17 hr |
Nearby
Frost Advisories in California, 2017Every frost advisory 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.