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, 4:07 PM PDT for Trinity County, California. It was in force for 8 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, 4:07 PM PDT (23:07 UTC)
- Expired
- Aug 7, 2017, 4:15 PM PDT
- In force
- 8 min
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 99 km from the middle of the area, began a volume at 23:09 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, 11.1 hours before the alert went out and 163 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.
468 WWUS86 KEKA 072307 SPSEKA Special Weather Statement National Weather Service Eureka CA 407 PM PDT MON AUG 7 2017 CAZ107-072315- Northern Trinity- 407 PM PDT MON AUG 7 2017 ...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL TRINITY COUNTY... At 406 PM PDT, a strong thunderstorm was located near Denny, or 19 miles east of Willow Creek, moving south at 15 mph. Half inch hail is possible with this storm. Locations impacted include... Denny. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. LAT...LON 4104 12337 4103 12313 4080 12309 4082 12345 TIME...MOT...LOC 2306Z 003DEG 13KT 4097 12326 $$ 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, 3:50 PM PDT | Special Weather Statement | EKA | Trinity | 25 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, 4:28 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.