Alert archive / California / Tornado Warnings in 2011
Tornado Warning 6, NWS Sacramento, CA
NWS Sacramento, CA issued this tornado warning at May 25, 2011, 6:45 PM PDT for Butte County, California. It was in force for 45 min. 7 reports 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
- May 25, 2011, 6:45 PM PDT (01:45 UTC)
- Expired
- May 25, 2011, 7:30 PM PDT
- In force
- 45 min
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
County Butte County, CA
The radar
The Beale AFB radar (KBBX), 21 km from the middle of the area, began a volume at 01:46 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 |
|---|---|---|---|
| May 25, 7:00 PM PDT | TSTM WND DMG | 7 Nw Oroville, CA | POSSIBLE OUTBUILDING/BARN TORNADO DAMAGE AT 2910 TABLE MOUNTAIN BLVD. |
| May 25, 7:00 PM PDT | HAIL 0.88 | 8 Ssw Paradise, CA | |
| May 25, 7:00 PM PDT | TORNADO | 7 Nw Oroville, CA | OUTBUILDING/BARN/DETACHED GARAGE/TREE DAMAGE AT TABLE MOUNTAIN BLVD. |
| May 25, 7:00 PM PDT | TORNADO | 8 Ssw Paradise, CA | OBSERVER SPOTTED TORNADO APPROX. 1 MILE SOUTH. |
| May 25, 7:10 PM PDT | HAIL 1 | 8 Ssw Paradise, CA | |
| May 25, 7:20 PM PDT | FUNNEL CLOUD | 8 Nnw Oroville, CA | |
| May 25, 7:23 PM PDT | FUNNEL CLOUD | 4 Ne Durham, CA | FUNNEL CLOUD HANGING OVER TOWN OF DURHAM FOR 10 MINUTES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 1.8 hours before the alert went out and 222 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
- 1378 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
559 WFUS56 KSTO 260145 TORSTO CAC007-260230- /O.NEW.KSTO.TO.W.0006.110526T0145Z-110526T0230Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 645 PM PDT WED MAY 25 2011 THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A * TORNADO WARNING FOR... CENTRAL BUTTE COUNTY IN NORTHERN CALIFORNIA... THIS INCLUDES THE CITIES OF...PARADISE...CHICO... * UNTIL 730 PM PDT * AT 641 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 13 MILES SOUTH OF CHICO...OR 1 MILES WEST OF WEST NORTHWEST OROVILLE...MOVING EAST AT 15 MPH. THESE THUNDERSTORMS HAVE A HISTORY OF DISSIPATING AND REFORMING TORNADOES. * THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3982 12157 3952 12149 3950 12179 3975 12185 TIME...MOT...LOC 0143Z 261DEG 12KT 3957 12178 $$ DANG/RB
2 follow-up statements
939 WWUS56 KSTO 260158 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 658 PM PDT WED MAY 25 2011 CAC007-260230- /O.CON.KSTO.TO.W.0006.000000T0000Z-110526T0230Z/ BUTTE CA- 658 PM PDT WED MAY 25 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM PDT FOR CENTRAL BUTTE COUNTY... AT 645 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING TORNADOES. THESE THUNDERSTORMS WERE LOCATED IN AN AREA ALONG HIGHWAY 99 BETWEEN CHICO AND OROVILLE TO THE EAST OF DURHAM...AND IN AN AREA JUST WEST OF PARADISE. THESE STORMS ARE MOVING EAST AT 15 MPH. THESE STORMS HAVE A HISTORY OF DISSIPATING AND REFORMING TORNADOES. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3982 12157 3952 12149 3950 12179 3975 12185 TIME...MOT...LOC 0149Z 261DEG 12KT 3957 12175 $$ DANG/RB
788 WWUS56 KSTO 260230 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 730 PM PDT WED MAY 25 2011 CAC007-260238- /O.EXP.KSTO.TO.W.0006.000000T0000Z-110526T0230Z/ BUTTE CA- 730 PM PDT WED MAY 25 2011 ...THE TORNADO WARNING FOR CENTRAL BUTTE COUNTY WILL EXPIRE AT 730 PM PDT... A STRONG THUNDERSTORM ABOUT 5 MILES SOUTH OF PARADISE CONTINUES TO MOVE TO THE NORTHEAST AT AROUND 15 MPH. THIS STORM IS CAPABLE OF PRODUCING OF DIME SIZED HAIL AND BRIEF HEAVY RAIN WITH LOCALLY GUSTY WINDS. THIS STORM MAY CONTINUE TO BRIEFLY SPAWN A FUNNEL CLOUD. LAT...LON 3982 12157 3952 12149 3950 12179 3975 12185 TIME...MOT...LOC 0228Z 261DEG 12KT 3959 12158 $$ DANG/RB
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 5:01 PM PDT | Special Weather Statement | STO | Butte | 59 min |
| May 25, 5:12 PM PDT | Tornado Warning | STO | Butte, Glenn | 63 min |
| May 25, 6:10 PM PDT | Tornado Warning | STO | Butte, Glenn | 35 min |
Nearby
Tornado Warnings in California, 2011Every tornado warning in 2011Tornadoes in 2011
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.