Alert archive / California / Special Weather Statements in 2017
Special Weather Statement, NWS Eureka, CA
NWS Eureka, CA issued this special weather statement at Aug 7, 2017, 3:50 PM PDT for Trinity County, California. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2017, 3:50 PM PDT (22:50 UTC)
- Expired
- Aug 7, 2017, 4:15 PM PDT
- In force
- 25 min
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 94 km from the middle of the area, began a volume at 22:50 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, 10.8 hours before the alert went out and 198 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
- 2184 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
481 WWUS86 KEKA 072250 SPSEKA Special Weather Statement National Weather Service Eureka CA 350 PM PDT MON AUG 7 2017 CAZ107-108-072315- Southern Trinity-Northern Trinity- 350 PM PDT MON AUG 7 2017 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TRINITY COUNTY... At 350 PM PDT, a strong thunderstorm was located 3 miles north of Hayfork, moving south at 10 mph. Winds in excess of 30 mph and half inch hail are possible with this storm. Locations impacted include... Hayfork and Peanut. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 4072 12325 4068 12302 4044 12303 4049 12338 TIME...MOT...LOC 2250Z 012DEG 8KT 4063 12316 $$ MKK
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 5:28 PM PDT | Special Weather Statement | EKA | 32 min | |
| Aug 6, 5:32 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 28 min |
| Aug 6, 6:08 PM PDT | Special Weather Statement | EKA | 22 min | |
| Aug 6, 11:36 PM PDT | Red Flag Warning | EKA | 20 hr | |
| Aug 7, 3:43 PM PDT | Special Weather Statement | EKA | Trinity | 32 min |
| Aug 7, 3:57 PM PDT | Special Weather Statement | EKA | 33 min | |
| Aug 7, 3:59 PM PDT | Special Weather Statement | EKA | Trinity | 16 min |
| Aug 7, 4:07 PM PDT | Special Weather Statement | EKA | Trinity | 8 min |
| Aug 7, 4:28 PM PDT | Special Weather Statement | EKA | 32 min | |
| Aug 7, 4:40 PM PDT | Special Weather Statement | EKA | Trinity | 35 min |
Nearby
Special Weather Statements in California, 2017Every special weather statement 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.