Alert archive / California / Tornado Warnings in 2012
Tornado Warning 4, NWS Sacramento, CA
NWS Sacramento, CA issued this tornado warning at Oct 22, 2012, 4:11 PM PDT for Nevada County, Placer County, Yuba County, California. It was in force for 49 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
- Oct 22, 2012, 4:11 PM PDT (23:11 UTC)
- Expired
- Oct 22, 2012, 5:00 PM PDT
- In force
- 49 min
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
Counties Nevada County, CA, Placer County, CA, Yuba County, CA
The radar
The Beale AFB radar (KBBX), 57 km from the middle of the area, began a volume at 23:12 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, 11.2 hours before the alert went out and 173 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
- 4 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 650 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 276 m²/s²
- 0-3 km storm-relative helicity
- 345 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
140 WFUS56 KSTO 222311 TORSTO CAC057-061-115-230000- /O.NEW.KSTO.TO.W.0004.121022T2311Z-121023T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 411 PM PDT MON OCT 22 2012 THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A * TORNADO WARNING FOR... SOUTHWESTERN NEVADA COUNTY IN CENTRAL CALIFORNIA... WEST CENTRAL PLACER COUNTY IN CENTRAL CALIFORNIA... SOUTH CENTRAL YUBA COUNTY IN CENTRAL CALIFORNIA... * UNTIL 500 PM PDT * AT 408 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED TWO SEVERE THUNDERSTORMS CAPABLE OF PRODUCING TORNADOES NEAR SHERIDAN...AND NORTHEAST OF WHEATLAND NEAR BEALE AIR FORCE BASE...MOVING NORTHEAST AT 25 MPH. * THE TORNADO WILL BE NEAR... RURAL WESTERN PLACER COUNTY AT 420 PM PDT RURAL SOUTHERN YUBA COUNTY AT 420 PM PDT RURAL SOUTHWESTERN NEVADA COUNTY AT 420 PM PDT RURAL WESTERN NEVADA COUNTY AT 450 PM PDT PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING PEA SIZE HAIL AND HEAVY RAIN. 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 3921 12116 3908 12104 3887 12136 3907 12142 TIME...MOT...LOC 2309Z 212DEG 22KT 3898 12135 $$ JCLAPP
2 follow-up statements
919 WWUS56 KSTO 222336 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 436 PM PDT MON OCT 22 2012 CAC057-061-115-230000- /O.CON.KSTO.TO.W.0004.000000T0000Z-121023T0000Z/ NEVADA CA-PLACER CA-YUBA CA- 436 PM PDT MON OCT 22 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM PDT FOR SOUTH CENTRAL YUBA...WEST CENTRAL PLACER AND SOUTHWESTERN NEVADA COUNTIES... AT 429 PM PDT...DOPPLER RADAR STILL INDICATES THE POTENTIAL FOR TORDANDOES. THE PUBLIC HAS REPORTED TORNADOES IN SURROUNDING STORMS. THESE TORNADOES ARE LOCATED OVER EXTREME SOUTHWESTERN NEVADA COUNTY AND NORTHWESTERN PLACER COUNTY...SOUTH OF SMARTVILLE AND NEAR LINCOLN...MOVING NORTHEAST AT 25 MPH. THE TORNADO WILL BE NEAR... RURAL WESTERN NEVADA COUNTY AT 450 PM PDT PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3890 12131 3912 12133 3921 12116 3909 12105 TIME...MOT...LOC 2333Z 212DEG 22KT 3910 12125 $$ JCLAPP
447 WWUS56 KSTO 230001 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 501 PM PDT MON OCT 22 2012 CAC057-061-115-230011- /O.EXP.KSTO.TO.W.0004.000000T0000Z-121023T0000Z/ NEVADA CA-PLACER CA-YUBA CA- 501 PM PDT MON OCT 22 2012 ...THE TORNADO WARNING FOR SOUTH CENTRAL YUBA...WEST CENTRAL PLACER AND SOUTHWESTERN NEVADA COUNTIES HAS EXPIRED... LAT...LON 3890 12131 3912 12133 3921 12116 3909 12105 TIME...MOT...LOC 2336Z 212DEG 22KT 3912 12124 $$ JCLAPP
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 1:11 PM PDT | Special Weather Statement | STO | Shasta | 49 min |
| Oct 22, 1:42 PM PDT | Special Weather Statement | STO | Tehama | 48 min |
| Oct 22, 2:13 PM PDT | Special Weather Statement | STO | Yuba | 62 min |
| Oct 22, 2:37 PM PDT | Tornado Warning | STO | Butte, Yuba | 38 min |
| Oct 22, 3:14 PM PDT | Tornado Warning | STO | Sutter, Yuba | 31 min |
| Oct 22, 3:42 PM PDT | Tornado Warning | STO | Nevada, Yuba | 48 min |
| Oct 22, 3:52 PM PDT | Special Weather Statement | STO | Shasta | 38 min |
Nearby
Tornado Warnings in California, 2012Every tornado warning in 2012Tornadoes in 2012
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.