Alert archive / California / Tornado Warnings in 2011

Tornado Warning 7, NWS Sacramento, CA

June 1, 2011Sacramento County, Yolo County, California

NWS Sacramento, CA issued this tornado warning at Jun 1, 2011, 3:18 PM PDT for Sacramento County, Yolo 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: Jun 1, 2011, 3:18 PM PDT (22:18 UTC)
Expired: Jun 1, 2011, 4:00 PM PDT
In force: 42 min
Issued by: NWS Sacramento, CA
Area: Storm-based polygon

Counties Sacramento County, CA, Yolo County, CA

The radar

The Sacramento radar (KDAX), 25 km from the middle of the area, began a volume at 22:20 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, 10.3 hours before the alert went out and 122 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: 14 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 694 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 57 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.

550 
WFUS56 KSTO 012218
TORSTO
CAC067-113-012300-
/O.NEW.KSTO.TO.W.0007.110601T2218Z-110601T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SACRAMENTO CA
318 PM PDT WED JUN 1 2011

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL SACRAMENTO COUNTY IN CENTRAL CALIFORNIA...
  EAST CENTRAL YOLO COUNTY IN CENTRAL CALIFORNIA...

* UNTIL 400 PM PDT

* AT 312 PM PDT...A STRONG THUNDERSTORM POSSIBLE OF PRODUCING A      
  TORNADO WAS JUST WEST OF ARCO OR POWER BALANCE ARENA MOVING TO     
  THE NORTHEAST AT 10 TO 20 MPH. THE STORM MAY ALSO PRODUCE          
  LARGE HAIL. 

* THE STRONG THUNDERSTORM AND POSSIBLE TORNADO WILL BE NEAR...
  POWER BALANCE ARENA...ELVERTA AND RIO LINDA BETWEEN 320 AND 
  335 PM.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR 
OTHER PIECE OF STURDY FURNITURE. 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 3874 12152 3872 12138 3860 12154 3864 12162
TIME...MOT...LOC 2215Z 230DEG 17KT 3865 12155

$$
JHM

2 follow-up statements

212 
WWUS56 KSTO 012234
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
334 PM PDT WED JUN 1 2011

CAC113-012242-
/O.CAN.KSTO.TO.W.0007.000000T0000Z-110601T2300Z/
YOLO CA-
334 PM PDT WED JUN 1 2011

...THE TORNADO WARNING FOR EAST CENTRAL YOLO COUNTY IS CANCELLED...

LAT...LON 3863 12150 3868 12156 3874 12152 3872 12138
TIME...MOT...LOC 2232Z 230DEG 17KT 3870 12147

$$

CAC067-012300-
/O.CON.KSTO.TO.W.0007.000000T0000Z-110601T2300Z/
SACRAMENTO CA-
334 PM PDT WED JUN 1 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM PDT FOR EXTREME
NORTH CENTRAL SACRAMENTO COUNTY...

AT 330 PM PDT...A STRONG THUNDERSTORM WAS LOCATED NEAR RIO 
LINDA...OR 9 MILES NORTH OF SACRAMENTO...MOVING NORTHEAST AT 20 MPH.
THIS STORM HAS A HISTORY OF PRODUCING FUNNEL CLOUDS. THE STORM WILL 
BE AFFECTING THE RIO LINDA AND ELVERTA AREAS THROUGH 4 PM. 
THE STORM MAY ALSO PRODUCE LARGE HAIL.  

LAT...LON 3863 12150 3868 12156 3874 12152 3872 12138
TIME...MOT...LOC 2232Z 230DEG 17KT 3870 12147

$$
JHM

461 
WWUS56 KSTO 012254
SVSSTO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
354 PM PDT WED JUN 1 2011

CAC067-012303-
/O.EXP.KSTO.TO.W.0007.000000T0000Z-110601T2300Z/
SACRAMENTO CA-
354 PM PDT WED JUN 1 2011

...THE TORNADO WARNING FOR EXTREME NORTH CENTRAL SACRAMENTO COUNTY
WILL EXPIRE AT 400 PM PDT...

A STRONG THUNDERSTORM IS LOCATED NORTH OF NORTH HIGHLANDS AND WILL 
BE MOVING TOWARDS ROSEVILLE THROUGH 430 PM. HAIL UP TO THE SIZE OF 
PENNIES AND HEAVY RAIN AND DANGEROUS LIGHTNING ARE LIKELY WITH THIS 
STORM. 

LAT...LON 3863 12150 3868 12156 3874 12152 3872 12138
TIME...MOT...LOC 2253Z 230DEG 17KT 3870 12139

$$
JHM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 5:13 PM PDT	Special Weather Statement	STO	Shasta	62 min
May 31, 5:57 PM PDT	Areal Flood Advisory	STO	Shasta	3 hr
Jun 1, 2:22 PM PDT	Special Weather Statement	STO	Yolo	53 min
Jun 1, 2:45 PM PDT	Special Weather Statement	STO	Yolo	45 min
Jun 1, 3:29 PM PDT	Special Weather Statement	STO	Sutter	61 min
Jun 1, 3:59 PM PDT	Special Weather Statement	STO	Sacramento	61 min
Jun 1, 4:31 PM PDT	Special Weather Statement	STO	Sacramento	44 min
Jun 1, 4:48 PM PDT	Special Weather Statement	STO	Butte, Colusa, Glenn, Sutter	57 min
Jun 1, 4:54 PM PDT	Special Weather Statement	STO	Sacramento	36 min

Nearby

Tornado Warnings in California, 2011 Every tornado warning in 2011 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.