Alert archive / California / Special Weather Statements in 2017
Special Weather Statement, NWS Eureka, CA
NWS Eureka, CA issued this special weather statement at Aug 9, 2017, 2:52 PM PDT for Trinity County, California. It was in force for 23 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 9, 2017, 2:52 PM PDT (21:52 UTC)
- Expired
- Aug 9, 2017, 3:15 PM PDT
- In force
- 23 min
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 83 km from the middle of the area, began a volume at 21:53 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, 9.9 hours before the alert went out and 231 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
- 166 J/kg
- Mixed-layer CIN
- -462 J/kg
- Mixed-layer LCL
- 1690 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
412
WWUS86 KEKA 092152
SPSEKA
Special Weather Statement
National Weather Service Eureka CA
252 PM PDT WED AUG 9 2017
CAZ108-092215-
Southern Trinity CA-
252 PM PDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TRINITY COUNTY UNTIL
315 PM PDT...
At 252 PM PDT, Doppler radar was tracking a strong thunderstorm near
Forest Glen, or 18 miles southwest of Hayfork, moving east at 5 mph.
Dime size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Ruth and Forest Glen.
LAT...LON 4031 12348 4045 12336 4045 12321 4027 12317
4020 12332
TIME...MOT...LOC 2152Z 274DEG 5KT 4034 12333
$$
GARNERThe office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 5:26 PM PDT | Special Weather Statement | EKA | Trinity | 34 min |
| Aug 8, 5:52 PM PDT | Special Weather Statement | EKA | Trinity | 23 min |
| Aug 8, 6:51 PM PDT | Special Weather Statement | EKA | 24 min | |
| Aug 8, 7:14 PM PDT | Special Weather Statement | EKA | 31 min | |
| Aug 9, 1:32 PM PDT | Special Weather Statement | EKA | 43 min | |
| Aug 9, 1:50 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino, Trinity | 23 min |
| Aug 9, 2:28 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 32 min |
| Aug 9, 2:34 PM PDT | Special Weather Statement | EKA | Mendocino | 26 min |
| Aug 9, 2:40 PM PDT | Special Weather Statement | EKA | Trinity | 35 min |
| Aug 9, 2:50 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 25 min |
| Aug 9, 3:05 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 25 min |
| Aug 9, 3:10 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 35 min |
| Aug 9, 3:23 PM PDT | Special Weather Statement | EKA | Trinity | 22 min |
| Aug 9, 3:43 PM PDT | Special Weather Statement | EKA | Mendocino | 32 min |
| Aug 9, 3:47 PM PDT | Special Weather Statement | EKA | Trinity | 28 min |
| Aug 9, 3:50 PM PDT | Special Weather Statement | EKA | Trinity | 25 min |
| Aug 9, 4:09 PM PDT | Special Weather Statement | EKA | Mendocino | 36 min |
| Aug 9, 4:12 PM PDT | Special Weather Statement | EKA | Trinity | 33 min |
| Aug 9, 4:41 PM PDT | Special Weather Statement | EKA | Trinity | 34 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.