Alert archive / California / Special Weather Statements in 2017
Special Weather Statement, NWS Eureka, CA
NWS Eureka, CA issued this special weather statement at Aug 6, 2017, 3:37 PM PDT. 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 6, 2017, 3:37 PM PDT (22:37 UTC)
- Expired
- Aug 6, 2017, 3:45 PM PDT
- In force
- 8 min
- Issued by
- NWS Eureka, CA
The radar
The Medford radar (KMAX), 107 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 138 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
- 2593 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
089
WWUS86 KEKA 062237
SPSEKA
Special Weather Statement
National Weather Service Eureka CA
337 PM PDT SUN AUG 6 2017
CAZ107-062245-
Northern Trinity CA-
337 PM PDT SUN AUG 6 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL TRINITY COUNTY
UNTIL 345 PM PDT...
At 334 PM PDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Carrville, or 29 miles north of Weaverville,
moving north at 20 mph.
Up to half inch hail will be possible with this storm.
This storm will remain over mainly rural areas of north central
Trinity County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4103 12289 4104 12291 4107 12292 4107 12295
4108 12297 4111 12297 4112 12296 4114 12296
4115 12295 4118 12296 4119 12295 4118 12293
4120 12289 4120 12284 4121 12282 4117 12278
TIME...MOT...LOC 2234Z 198DEG 17KT 4115 12287
$$
KRThe office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 2:18 PM PDT | Special Weather Statement | EKA | Trinity | 12 min |
| Aug 6, 2:33 PM PDT | Special Weather Statement | EKA | Trinity | 12 min |
| Aug 6, 2:48 PM PDT | Special Weather Statement | EKA | 12 min | |
| Aug 6, 2:54 PM PDT | Special Weather Statement | EKA | Trinity | 21 min |
| Aug 6, 2:58 PM PDT | Special Weather Statement | EKA | Trinity | 17 min |
| Aug 6, 3:08 PM PDT | Special Weather Statement | EKA | Trinity | 22 min |
| Aug 6, 3:16 PM PDT | Special Weather Statement | EKA | Glenn | 14 min |
| Aug 6, 3:32 PM PDT | Special Weather Statement | EKA | Trinity | 13 min |
| Aug 6, 3:49 PM PDT | Special Weather Statement | EKA | Trinity | 11 min |
| Aug 6, 4:04 PM PDT | Special Weather Statement | EKA | Siskiyou | 26 min |
| Aug 6, 4:16 PM PDT | Special Weather Statement | EKA | Trinity | 14 min |
| Aug 6, 4:39 PM PDT | Special Weather Statement | EKA | Siskiyou | 21 min |
| Aug 6, 4:53 PM PDT | Special Weather Statement | EKA | Trinity | 22 min |
| Aug 6, 4:57 PM PDT | Special Weather Statement | EKA | Siskiyou | 33 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.