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, 6:08 PM PDT. It was in force for 22 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, 6:08 PM PDT (01:08 UTC)
- Expired
- Aug 6, 2017, 6:30 PM PDT
- In force
- 22 min
- Issued by
- NWS Eureka, CA
The radar
The Medford radar (KMAX), 120 km from the middle of the area, began a volume at 01:13 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 00:00Z, 1.1 hours before the alert went out and 152 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
- 7 J/kg
- Mixed-layer CIN
- -207 J/kg
- Mixed-layer LCL
- 3615 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
550
WWUS86 KEKA 070108
SPSEKA
Special Weather Statement
National Weather Service Eureka CA
608 PM PDT SUN AUG 6 2017
CAZ107-070130-
Northern Trinity-
608 PM PDT SUN AUG 6 2017
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN TRINITY COUNTY...
At 606 PM PDT, a strong thunderstorm was located near Carrville and
Trinity Center, around 5 miles east of Trinity Center. the storm is
nearly stationary.
Winds in excess of 30 mph and nickel size hail are possible with this
storm.
Locations impacted include...
Carrville, Trinity Center and Highway 3.
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.
If you are on or near Trinity Lake, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
LAT...LON 4107 12254 4106 12252 4101 12253 4100 12254
4100 12255 4099 12257 4099 12259 4097 12260
4092 12261 4090 12260 4088 12267 4103 12279
4118 12257 4109 12250
TIME...MOT...LOC 0106Z 094DEG 1KT 4099 12266
$$
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, 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, 4:07 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.