Alert archive / California / Special Weather Statements in 2017
Special Weather Statement, NWS Eureka, CA
NWS Eureka, CA issued this special weather statement at Aug 8, 2017, 3:58 PM PDT. It was in force for 32 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 8, 2017, 3:58 PM PDT (22:58 UTC)
- Expired
- Aug 8, 2017, 4:30 PM PDT
- In force
- 32 min
- Issued by
- NWS Eureka, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 126 km from the middle of the area, began a volume at 22:57 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, 11.0 hours before the alert went out and 253 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
- 877 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
827
WWUS86 KEKA 082258
SPSEKA
Special Weather Statement
National Weather Service Eureka CA
358 PM PDT TUE AUG 8 2017
CAZ108-111-082330-
Southern Trinity-Northeastern Mendocino Interior-
358 PM PDT TUE AUG 8 2017
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN MENDOCINO AND SOUTH
CENTRAL TRINITY COUNTIES...
At 358 PM PDT, a strong thunderstorm was located 7 miles north of
Covelo. the storm is nearly stationary.
Winds in excess of 30 mph and half inch hail are possible with this
storm.
This storm will remain over mainly rural areas of southeastern
Southern Trinity and northeastern Northeastern Mendocino Interior
Counties.
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.
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 3991 12293 3991 12295 3984 12296 3983 12295
3981 12295 3983 12333 3990 12334 4000 12334
4000 12295 3999 12293 3997 12292 3994 12293
3993 12292
TIME...MOT...LOC 2258Z 093DEG 2KT 3990 12323
$$
JMG/RCLThe office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:04 PM PDT | Special Weather Statement | EKA | 11 min | |
| Aug 7, 5:16 PM PDT | Special Weather Statement | EKA | Trinity | 29 min |
| Aug 7, 5:25 PM PDT | Special Weather Statement | EKA | Trinity | 35 min |
| Aug 7, 5:37 PM PDT | Special Weather Statement | EKA | Trinity | 23 min |
| Aug 7, 5:55 PM PDT | Special Weather Statement | EKA | Trinity | 35 min |
| Aug 7, 6:27 PM PDT | Special Weather Statement | EKA | 33 min | |
| Aug 7, 8:15 PM PDT | Fire Weather Watch | EKA | 7 hr | |
| Aug 8, 3:22 AM PDT | Red Flag Warning | EKA | 17 hr | |
| Aug 8, 3:22 PM PDT | Special Weather Statement | EKA | Trinity | 23 min |
| Aug 8, 3:34 PM PDT | Special Weather Statement | EKA | 26 min | |
| Aug 8, 3:49 PM PDT | Special Weather Statement | EKA | Trinity | 26 min |
| Aug 8, 3:52 PM PDT | Red Flag Warning | EKA | 28 hr | |
| Aug 8, 4:12 PM PDT | Special Weather Statement | EKA | Trinity | 33 min |
| Aug 8, 4:35 PM PDT | Special Weather Statement | EKA | Glenn | 25 min |
| Aug 8, 4:42 PM PDT | Special Weather Statement | EKA | Trinity | 18 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.