Alert archive / California / Tornado Warnings in 2005

Tornado Warning 9, NWS Sacramento, CA

April 8, 2005San Joaquin County, California

NWS Sacramento, CA issued this tornado warning at Apr 8, 2005, 3:56 PM PDT for San Joaquin County, California. It was in force for 34 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: Apr 8, 2005, 3:56 PM PDT (22:56 UTC)
Expired: Apr 8, 2005, 4:30 PM PDT
In force: 34 min
Issued by: NWS Sacramento, CA
Area: Counties, with a storm outline in the text

County San Joaquin County, CA

The radar

The Sacramento radar (KDAX), 85 km from the middle of the area, began a volume at 22:59 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 12:00Z, 10.9 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 18 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 886 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 167 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.

000 
WFUS56 KSTO 082257 CCA
TORSTO
CAC077-082330-
/O.NEW.KSTO.TO.W.0009.050408T2256Z-050408T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
356 PM PDT FRI APR 8 2005

CORRECTION...THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING 
THAT WAS PREVIOUSLY ISSUED

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEAST SAN JOAQUIN COUNTY IN CALIFORNIA
  THIS INCLUDES THE NORTH SIDE OF THE CITY OF MANTECA

* UNTIL 430 PM PDT

* AT 345 PM PDT...THE PUBLIC REPORTED A FUNNEL CLOUD NEAR LATHROP 
  ROAD AND HIGHWAY 99 IN SAN JOAQUIN COUNTY. RADAR INDICATES 
  STRONG ROTATION WITH THIS STORM LOCATED NEAR MANTECA...MOVING EAST 
  AT 15 MPH. A TORNADO IS POSSIBLE AT ANYTIME

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ESCALON.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 3793 12127 3775 12127 3776 12094 3795 12095

$$

2 follow-up statements

000 
WWUS56 KSTO 082318 RRA
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
411 PM PDT FRI APR 8 2005

CAC077-082330-
/O.CON.KSTO.TO.W.0009.000000T0000Z-050408T2330Z/
SAN JOAQUIN CA-
418 PM PDT FRI APR 8 2005

...A TORNADO WARNING CONTINUES UNTIL 430 PM PDT FOR SOUTHEAST SAN 
JOAQUIN COUNTY...

AT 410 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM WITH STRONG ROTATION OVER SOUTHEAST SAN 
JOAQUIN COUNTY...ABOUT 11 MILES EAST NORTHEAST OF MANTECA. A FUNNEL 
CLOUD WAS REPORTED WITH THIS STORM AT 345 PM. ANOTHER THUNDERSTORM 
WITH STRONG ROTATION IS INDICATED BY RADAR 7 MILES TO THE WEST OF 
MANTECA. THESE STORMS ARE MOVING TO THE EAST AT 15 TO 20 MPH.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET 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 3793 12127 3775 12127 3776 12094 3795 12095

$$

000 
WWUS56 KSTO 082327
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
427 PM PDT FRI APR 8 2005

CAC077-082335-
/O.EXP.KSTO.TO.W.0009.000000T0000Z-050408T2330Z/
SAN JOAQUIN CA-
427 PM PDT FRI APR 8 2005

...THE TORNADO WARNING FOR SOUTHEAST SAN JOAQUIN COUNTY EXPIRES AT 
430 PM PDT...

WEATHER RADAR INDICATES THUNDERSTORMS OVER SOUTHEAST SAN JOAQUIN 
COUNTY HAVE WEAKENED AND NO LONGER POSE AN IMMEDIATE THREAT OF 
GENERATING A TORNADO. RESIDENTS OF THE NORTHERN SAN JOAQUIN VALLEY 
ARE ADVISED TO KEEP A CLOSE EYE ON THE SKY THROUGH EARLY THIS 
EVENING.

LAT...LON 3793 12127 3775 12127 3776 12094 3795 12095

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 1:15 PM PDT	Tornado Warning	STO	Butte, Glenn	30 min
Apr 8, 1:44 PM PDT	Tornado Warning	STO	Butte, Glenn	31 min
Apr 8, 2:15 PM PDT	Severe Thunderstorm Warning	STO	Butte, Glenn	31 min
Apr 8, 2:40 PM PDT	Severe Thunderstorm Warning	STO	Sutter, Yuba	35 min
Apr 8, 2:59 PM PDT	Tornado Warning	STO	Sacramento, Yolo	31 min
Apr 8, 3:25 PM PDT	Severe Thunderstorm Warning	STO	Butte	50 min
Apr 8, 3:29 PM PDT	Tornado Warning	STO	Sacramento	37 min
Apr 8, 3:40 PM PDT	Tornado Warning	STO	Butte	38 min
Apr 8, 3:51 PM PDT	Severe Thunderstorm Warning	STO	San Joaquin	39 min
Apr 8, 4:55 PM PDT	Severe Thunderstorm Warning	STO	El Dorado, Sacramento	35 min

Nearby

Tornado Warnings in California, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.