Alert archive / California / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 1, NWS Eureka, CA
NWS Eureka, CA issued this severe thunderstorm warning at Aug 29, 2007, 3:23 PM PDT for Trinity County, California. It was in force for 52 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 29, 2007, 3:23 PM PDT (22:23 UTC)
- Expired
- Aug 29, 2007, 4:15 PM PDT
- In force
- 52 min
- Issued by
- NWS Eureka, CA
- Area
- Counties, with a storm outline in the text
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 81 km from the middle of the area, began a volume at 22:27 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, 10.4 hours before the alert went out and 200 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
- 2090 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS56 KEKA 292224 SVREKA CAC105-292315- /O.NEW.KEKA.SV.W.0001.070829T2223Z-070829T2315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EUREKA CA 323 PM PDT WED AUG 29 2007 THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL TRINITY COUNTY IN NORTHWEST CALIFORNIA * UNTIL 415 PM PDT * AT 323 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DIME SIZE HAIL. THIS STORM WAS LOCATED 8 MILES SOUTH OF BIG BAR...OR ABOUT 6 MILES WEST OF HAYFORK...AND MOVING NORTHWEST AT 5 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HYAMPOM AND DEL LOMA LAT...LON 4060 12354 4080 12334 4062 12310 4048 12324 TIME...MOT...LOC 2223Z 149DEG 8KT 4062 12327 $$ MJV
2 follow-up statements
000
WWUS56 KEKA 292310
SVSEKA
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
405 PM PDT WED AUG 29 2007
CAC105-292315-
/O.CON.KEKA.SV.W.0001.000000T0000Z-070829T2315Z/
TRINITY CA-
405 PM PDT WED AUG 29 2007
...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 415 PM PDT FOR WEST
CENTRAL TRINITY... COUNTY...
AT 402 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DIME SIZE HAIL.
THIS STORM WAS LOCATED 3 MILES SOUTH OF BIG BAR...OR ABOUT 9 MILES
SOUTHEAST OF DEL LOMA...MOVING NORTHWEST AT 5 MPH.
THIS STORM HAS DECREASED IN INTENSITY DURING THE PAST 10 MINUTES.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DEL
LOMA.
LAT...LON 4060 12354 4080 12334 4062 12310 4048 12324
TIME...MOT...LOC 2305Z 149DEG 8KT 4072 12331
$$
MJV000 WWUS56 KEKA 292316 SVSEKA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EUREKA CA 415 PM PDT WED AUG 29 2007 CAC105-292325- /O.EXP.KEKA.SV.W.0001.000000T0000Z-070829T2315Z/ TRINITY CA- 415 PM PDT WED AUG 29 2007 ...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL TRINITY COUNTY HAS EXPIRED. A SLOW-MOVING THUNDERSTORM CONTINUES TO BRING HEAVY RAIN AND OCCASIONAL LIGHTNING TO EAST CENTRAL TRINITY COUNTY. HOWEVER...THE STORM HAS WEAKENED AND THE WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 4060 12354 4080 12334 4062 12310 4048 12324 TIME...MOT...LOC 2315Z 149DEG 8KT 4064 12330 $$ MJV
Nearby
Severe Thunderstorm Warnings in California, 2007Every severe thunderstorm warning in 2007
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.