Alert archive / California / Tornado Warnings in 2012
Tornado Warning 5, NWS Sacramento, CA
NWS Sacramento, CA issued this tornado warning at Oct 22, 2012, 5:00 PM PDT for Nevada County, Placer County, Yuba County, California. It was in force for 45 min. 2 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
- Oct 22, 2012, 5:00 PM PDT (00:00 UTC)
- Expired
- Oct 22, 2012, 5:45 PM PDT
- In force
- 45 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), 63 km from the middle of the area, began a volume at 00:01 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 |
|---|---|---|---|
| Oct 22, 5:19 PM PDT | TORNADO | Higgins Corner, CA | FIRE DEPT REPORTS TORNADO TOUCH DOWN NEAR LAKE OF THE PINES AREA. |
| Oct 22, 5:30 PM PDT | TORNADO 1 | Higgins Corner, CA | THE NWS STORM SURVEY HAS RATED THE 10/22/2012 LAKE OF THE PINES STORM AS AN EF1 TORNADO. THIS TORNADO TOUCHED DOWN NEAR HIGHWAY 49 AT COMBIE ROAD AND TRAVELED A DISTANCE OF AROUND 4 MILES TO THE NORTHEAST. WINDS WERE ESTIMATED AT 90 TO 100 MPH. MOST OF THE DAM |
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, 0.0 hours before the alert went out and 183 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
- 123 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1132 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
002 WFUS56 KSTO 230000 TORSTO CAC057-061-115-230045- /O.NEW.KSTO.TO.W.0005.121023T0000Z-121023T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 500 PM PDT MON OCT 22 2012 THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A * TORNADO WARNING FOR... SOUTHWESTERN NEVADA COUNTY IN CENTRAL CALIFORNIA... THIS INCLUDES THE CITY OF GRASS VALLEY... CENTRAL PLACER COUNTY IN CENTRAL CALIFORNIA... SOUTH CENTRAL YUBA COUNTY IN CENTRAL CALIFORNIA... * UNTIL 545 PM PDT * AT 457 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF LAKE OF THE PINES...OR 10 MILES NORTHWEST OF AUBURN...MOVING NORTHEAST AT 25 MPH. * THE TORNADO WILL BE NEAR... LAKE OF THE PINES AND 8 MILES NORTHWEST OF APPLEGATE BY 515 PM PDT... ALTA SIERRA BY 525 PM PDT... COLFAX AND 8 MILES SOUTHEAST OF ROUGH AND READY BY 530 PM PDT... CEDAR RIDGE...GRASS VALLEY AND 9 MILES NORTHWEST OF IOWA HILL BY 540 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 3933 12106 3911 12081 3884 12116 3902 12131 TIME...MOT...LOC 0000Z 219DEG 20KT 3902 12117 $$ JCLAPP
1 follow-up statement
725 WWUS56 KSTO 230046 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 546 PM PDT MON OCT 22 2012 CAC057-061-115-230056- /O.EXP.KSTO.TO.W.0005.000000T0000Z-121023T0045Z/ NEVADA CA-PLACER CA-YUBA CA- 546 PM PDT MON OCT 22 2012 ...THE TORNADO WARNING FOR SOUTH CENTRAL YUBA...CENTRAL PLACER AND SOUTHWESTERN NEVADA COUNTIES HAS EXPIRED... LAT...LON 3933 12106 3911 12081 3884 12116 3902 12131 TIME...MOT...LOC 0000Z 219DEG 20KT 3902 12117 $$ JCLAPP
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 5:46 PM PDT | Tornado Warning | STO | El Dorado, Nevada, Placer | 44 min |
| Oct 22, 6:29 PM PDT | Tornado Warning | STO | El Dorado, Nevada, Placer | 46 min |
| Oct 23, 5:48 AM PDT | Winter Weather Advisory | STO | 35 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.