Alert archive / California / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 9, NWS Eureka, CA
NWS Eureka, CA issued this severe thunderstorm warning at Jun 3, 2009, 3:28 PM PDT for Mendocino County, Trinity County, California. It was in force for 32 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
- Jun 3, 2009, 3:28 PM PDT (22:28 UTC)
- Expired
- Jun 3, 2009, 4:00 PM PDT
- In force
- 32 min
- Issued by
- NWS Eureka, CA
- Area
- Storm-based polygon
Counties Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 106 km from the middle of the area, began a volume at 22:30 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, 10.5 hours before the alert went out and 264 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 873 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 75 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 032228 SVREKA CAC045-105-032300- /O.NEW.KEKA.SV.W.0009.090603T2228Z-090603T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EUREKA CA 328 PM PDT WED JUN 3 2009 THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN MENDOCINO COUNTY IN NORTHWEST CALIFORNIA... SOUTH CENTRAL TRINITY COUNTY IN NORTHWEST CALIFORNIA... * UNTIL 400 PM PDT * AT 326 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED OVER NORTHEASTERN MENDOCINO COUNTY...OR 11 MILES NORTHEAST OF COVELO...AND MOVING NORTHWEST AT 20 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 4008 12340 4019 12311 3989 12301 3984 12314 TIME...MOT...LOC 2227Z 155DEG 17KT 3992 12311 $$ BK
1 follow-up statement
000 WWUS56 KEKA 032245 SVSEKA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EUREKA CA 345 PM PDT WED JUN 3 2009 CAC045-105-032300- /O.CON.KEKA.SV.W.0009.000000T0000Z-090603T2300Z/ TRINITY CA-MENDOCINO CA- 345 PM PDT WED JUN 3 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR NORTHEASTERN MENDOCINO AND SOUTH CENTRAL TRINITY COUNTIES... AT 344 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER EXTREME SOUTH CENTRAL TRINITY COUNTY...OR 14 MILES NORTH OF COVELO...MOVING NORTHWEST AT 20 MPH. THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4008 12340 4019 12311 3989 12301 3984 12314 TIME...MOT...LOC 2245Z 155DEG 17KT 4000 12316 $$ BK
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 6:15 PM PDT | Special Weather Statement | EKA | Mendocino | 45 min |
| Jun 2, 6:32 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 28 min |
| Jun 2, 7:15 PM PDT | Special Weather Statement | EKA | Siskiyou | 45 min |
| Jun 3, 2:43 PM PDT | Areal Flood Advisory | EKA | Mendocino | 3 hr |
| Jun 3, 2:47 PM PDT | Special Weather Statement | EKA | Trinity | 43 min |
| Jun 3, 3:04 PM PDT | Special Weather Statement | EKA | 56 min | |
| Jun 3, 3:21 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt, Trinity | 24 min |
| Jun 3, 3:44 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt, Trinity | 46 min |
| Jun 3, 3:51 PM PDT | Special Weather Statement | EKA | Humboldt | 39 min |
| Jun 3, 4:00 PM PDT | Severe Thunderstorm Warning | EKA | Mendocino | 18 min |
| Jun 3, 4:05 PM PDT | Severe Thunderstorm Warning | EKA | Trinity | 25 min |
| Jun 3, 4:20 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt | 25 min |
| Jun 3, 4:26 PM PDT | Special Weather Statement | EKA | Humboldt | 19 min |
| Jun 3, 4:36 PM PDT | Special Weather Statement | EKA | Mendocino | 24 min |
| Jun 3, 4:42 PM PDT | Special Weather Statement | EKA | Mendocino | 33 min |
| Jun 3, 4:47 PM PDT | Severe Thunderstorm Warning | EKA | Humboldt, Trinity | 13 min |
Nearby
Severe Thunderstorm Warnings in California, 2009Every severe thunderstorm warning in 2009
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.