Alert archive / California / Tornado Warnings in 2014

Tornado Warning 13, NWS Sacramento, CA

March 29, 2014Butte County, Tehama County, California

NWS Sacramento, CA issued this tornado warning at Mar 29, 2014, 8:33 PM PDT for Butte County, Tehama County, California. It was in force for 42 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
Mar 29, 2014, 8:33 PM PDT (03:33 UTC)
Expired
Mar 29, 2014, 9:15 PM PDT
In force
42 min
Issued by
NWS Sacramento, CA
Area
Storm-based polygon

Counties Butte County, CA, Tehama County, CA

The radar

The Beale AFB radar (KBBX), 43 km from the middle of the area, began a volume at 03:33 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

Oakland, CA (KOAK), launched 00:00Z, 3.6 hours before the alert went out and 237 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.

Skew-T log-pSkew-T log-p diagram, Oakland, CA at 00:00Z on 2014-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 00:00Z on 2014-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
3 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1002 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

907 
WFUS56 KSTO 300333
TORSTO
CAC007-103-300415-
/O.NEW.KSTO.TO.W.0013.140330T0333Z-140330T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
833 PM PDT SAT MAR 29 2014

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL BUTTE COUNTY IN NORTHERN CALIFORNIA...
  SOUTH CENTRAL TEHAMA COUNTY IN NORTHERN CALIFORNIA...

* UNTIL 915 PM PDT

* AT 830 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR            
  NORD...OR 8 MILES NORTHWEST OF CHICO...MOVING EAST AT 10 MPH.
  THE POSSIBLE TORNADO IS OVER HIGHWAY 99. 

* THE TORNADO WILL BE OVER...
  RURAL NORTHWESTERN BUTTE COUNTY THROUGH 910 PM PDT...AND IS 
  EXPECTED TO REMAIN NORTH OF CHICO. 
  HAIL AND DANGEROUS LIGHTNING ARE ALSO EXPECTED. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO UNDER A WORKBENCH OR OTHER 
PIECE OF STURDY FURNITURE. 

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 3990 12181 3976 12176 3975 12197 3990 12194
TIME...MOT...LOC 0330Z 279DEG 7KT 3981 12188

$$
JHM
2 follow-up statements
413 
WWUS56 KSTO 300354
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
854 PM PDT SAT MAR 29 2014

CAC007-103-300415-
/O.CON.KSTO.TO.W.0013.000000T0000Z-140330T0415Z/
TEHAMA CA-BUTTE CA-
854 PM PDT SAT MAR 29 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM PDT FOR WEST
CENTRAL BUTTE AND SOUTH CENTRAL TEHAMA COUNTIES...

AT 848 PM PDT...DOPPLER RADAR INDICATED A POSSIBLE TORNADO ABOUT 7 
MILES NORTHWEST OF CHICO AND EAST OF NORD...MOVING TO THE EAST AT 10 
TO 15 MPH. THE POSSIBLE TORNADO IS VERY CLOSE TO HIGHWAY 99. 

EARLIER...AT 740 PM...A TRAINED WEATHER SPOTTER REPORTED A BRIEF 
TORNADO FOR ABOUT A MINUTE JUST NORTHWEST OF NORD WITH THIS STORM. 

THE POSSIBLE TORNADO IS EXPECTED TO REMAIN OVER MAINLY RURAL AREAS 
OF NORTHWEST BUTTE COUNTY...AND JUST A FEW MILES NORTHWEST OF CHICO. 

TAKE SHELTER NOW IF YOU LIVE IN NEAR NORD. 

LAT...LON 3990 12181 3976 12176 3975 12197 3990 12194
TIME...MOT...LOC 0344Z 279DEG 7KT 3981 12185

$$
JHM
220 
WWUS56 KSTO 300416
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
916 PM PDT SAT MAR 29 2014

CAC007-103-300425-
/O.EXP.KSTO.TO.W.0013.000000T0000Z-140330T0415Z/
TEHAMA CA-BUTTE CA-
916 PM PDT SAT MAR 29 2014

...THE TORNADO WARNING FOR WEST CENTRAL BUTTE AND SOUTH CENTRAL
TEHAMA COUNTIES HAS EXPIRED...

DOPPLER RADAR INDICATES THE TORNADIC CIRCULATION HAS WEAKENED AND 
THE WARNING WILL NOT BE REISSUED FOR THE THE AREA. 

LAT...LON 3990 12181 3976 12176 3975 12197 3990 12194
TIME...MOT...LOC 0354Z 279DEG 7KT 3981 12182

$$
JHM

The office that day

Everything else NWS Sacramento, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 29, 5:05 PM PDTSpecial Weather StatementSTOTehama40 min
Mar 29, 5:25 PM PDTTornado WarningSTOGlenn, Tehama35 min
Mar 29, 6:01 PM PDTTornado WarningSTOGlenn, Tehama29 min
Mar 29, 6:31 PM PDTSpecial Weather StatementSTOTehama44 min
Mar 29, 7:45 PM PDTTornado WarningSTOButte, Glenn, Tehama45 min
Mar 29, 9:21 PM PDTSpecial Weather StatementSTOButte54 min
Mar 30, 3:40 AM PDTWinter Storm WatchSTO10 hr
Mar 30, 1:22 PM PDTWinter Storm WarningSTO38 hr
Mar 30, 1:22 PM PDTWinter Weather AdvisorySTO38 hr

Nearby

Tornado Warnings in California, 2014Every tornado warning in 2014Tornadoes in 2014

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.