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, 3:43 PM PDT for Trinity County, California. 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 7, 2017, 3:43 PM PDT (22:43 UTC)
- Expired
- Aug 7, 2017, 4:15 PM PDT
- In force
- 32 min
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 125 km from the middle of the area, began a volume at 22:46 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, 10.7 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.
987
WWUS86 KEKA 072243
SPSEKA
Special Weather Statement
National Weather Service Eureka CA
343 PM PDT MON AUG 7 2017
CAZ107-072315-
Northern Trinity-
343 PM PDT MON AUG 7 2017
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TRINITY COUNTY...
At 342 PM PDT, a strong thunderstorm was located 9 miles north of
Weaverville, moving south at 10 mph.
Winds in excess of 30 mph are possible with this storm.
Locations impacted include...
Weaverville. Highways 3 and 299.
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 4080 12283 4077 12295 4092 12307 4100 12293
4099 12292 4101 12291 4095 12287
TIME...MOT...LOC 2242Z 358DEG 9KT 4086 12295
$$
RCLThe 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, 3:50 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, 4:07 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.