Alert archive / California / Frost Advisories in 2017
Frost Advisory 13, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at May 16, 2017, 2:54 PM PDT for Trinity County, California. It took effect at May 17, 2017, 1:00 AM PDT. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 16, 2017, 2:54 PM PDT (21:54 UTC)
- In effect from
- May 17, 2017, 1:00 AM PDT
- Expired
- May 17, 2017, 4:19 AM PDT
- In force
- 3 hr
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 21:55 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
Medford/Jackson, OR (KMFR), launched 12:00Z, 9.9 hours before the alert went out and 193 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
- 656 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 300 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
434 WWUS76 KEKA 162154 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 254 PM PDT Tue May 16 2017 CAZ107-108-171100- /O.NEW.KEKA.FR.Y.0013.170517T0800Z-170517T1500Z/ Northern Trinity-Southern Trinity- 254 PM PDT Tue May 16 2017 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM PDT WEDNESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 8 AM PDT Wednesday. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth and Hyampom. * 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. && $$
2 follow-up statements
037 WWUS76 KEKA 170529 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1029 PM PDT Tue May 16 2017 CAZ107-108-171500- /O.CON.KEKA.FR.Y.0013.170517T0800Z-170517T1500Z/ Northern Trinity-Southern Trinity- 1029 PM PDT Tue May 16 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM PDT WEDNESDAY... * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth and Hyampom. * TEMPERATURES...Falling to 33 to 36 degrees. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. $$
706 WWUS76 KEKA 171119 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 419 AM PDT Wed May 17 2017 CAZ107-108-171500- /O.UPG.KEKA.FR.Y.0013.000000T0000Z-170517T1500Z/ /O.NEW.KEKA.FZ.W.0005.170517T1119Z-170517T1500Z/ Northern Trinity-Southern Trinity- 419 AM PDT Wed May 17 2017 ...FREEZE WARNING IN EFFECT UNTIL 8 AM PDT THIS MORNING... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect until 8 AM PDT this morning. The Frost Advisory is no longer in effect. * LOW TEMPERATURES...upper 20S to lower 30S. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...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. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 2:53 PM PDT | Small Craft Advisory | EKA | 4 days |
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.