Alert archive / California / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 2, NWS Eureka, CA
NWS Eureka, CA issued this severe thunderstorm warning at Aug 5, 2012, 3:26 PM PDT for Humboldt County, Trinity County, California. It was in force for 34 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 5, 2012, 3:26 PM PDT (22:26 UTC)
- Expired
- Aug 5, 2012, 4:00 PM PDT
- In force
- 34 min
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
Counties Humboldt County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 78 km from the middle of the area, began a volume at 22:28 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 5, 4:00 PM PDT | HAIL 0.5 | 1 Ne Burnt Ranch, CA | OBSERVER ON IRONSIDE MOUNTAIN REPORTED HAIL COVERING THE GROUND. HAIL UP TO 1/2 INCH IN DIAMETER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 10.4 hours before the alert went out and 178 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
- 3 J/kg
- Mixed-layer CIN
- -793 J/kg
- Mixed-layer LCL
- 2407 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
765 WUUS56 KEKA 052226 SVREKA CAC023-105-052300- /O.NEW.KEKA.SV.W.0002.120805T2226Z-120805T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EUREKA CA 326 PM PDT SUN AUG 5 2012 THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL HUMBOLDT COUNTY IN NORTHWEST CALIFORNIA... WEST CENTRAL TRINITY COUNTY IN NORTHWEST CALIFORNIA... * UNTIL 400 PM PDT * AT 324 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BURNT RANCH...OR 15 MILES SOUTHEAST OF WILLOW CREEK...AND MOVING NORTHWEST AT 10 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SALYER AND DENNY PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4092 12368 4102 12341 4074 12324 4065 12344 TIME...MOT...LOC 2226Z 152DEG 9KT 4080 12343 $$ RPA
1 follow-up statement
005 WWUS56 KEKA 052242 SVSEKA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EUREKA CA 342 PM PDT SUN AUG 5 2012 CAC023-105-052300- /O.CON.KEKA.SV.W.0002.000000T0000Z-120805T2300Z/ HUMBOLDT CA-TRINITY CA- 342 PM PDT SUN AUG 5 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR WEST CENTRAL TRINITY AND EXTREME EAST CENTRAL HUMBOLDT COUNTIES... AT 337 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BURNT RANCH...OR 12 MILES SOUTHEAST OF WILLOW CREEK... MOVING NORTHWEST AT 10 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4095 12359 4101 12343 4077 12328 4070 12342 TIME...MOT...LOC 2242Z 152DEG 9KT 4084 12345 $$ RPA
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:22 PM PDT | Special Weather Statement | EKA | Trinity | 38 min |
| Aug 5, 3:58 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 16 min |
| Aug 5, 4:18 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 27 min |
| Aug 5, 4:31 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 29 min |
Nearby
Severe Thunderstorm Warnings in California, 2012Every severe thunderstorm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.