Alert archive / California / Tornado Warnings in 2012
Tornado Warning 6, NWS Sacramento, CA
NWS Sacramento, CA issued this tornado warning at Oct 22, 2012, 5:46 PM PDT for El Dorado County, Nevada County, Placer County, California. It was in force for 44 min. 1 report 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, 5:46 PM PDT (00:46 UTC)
- Expired
- Oct 22, 2012, 6:30 PM PDT
- In force
- 44 min
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
Counties El Dorado County, CA, Nevada County, CA, Placer County, CA
The radar
The Beale AFB radar (KBBX), 66 km from the middle of the area, began a volume at 00:48 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, 6:09 PM PDT | HAIL 0.5 | Colfax, CA | LARGEST HAIL DIME SIZE |
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, 0.8 hours before the alert went out and 186 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.
667 WFUS56 KSTO 230046 TORSTO CAC017-057-061-230130- /O.NEW.KSTO.TO.W.0006.121023T0046Z-121023T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SACRAMENTO CA 546 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... EXTREME NORTHWESTERN EL DORADO COUNTY IN CENTRAL CALIFORNIA... WESTERN PLACER COUNTY IN CENTRAL CALIFORNIA... THIS INCLUDES THE CITY OF AUBURN... * UNTIL 630 PM PDT * AT 544 PM PDT...WEATHER SERVICE RADAR INDICATES AND THE PUBLIC REPORTED A TORNADO NEAR LAKE OF THE PINES...OR 8 MILES NORTH OF AUBURN...MOVING NORTHEAST AT 25 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO APPLEGATE...ALTA SIERRA...WEIMAR...COLFAX...CEDAR RIDGE...IOWA HILL AND SUGAR PINE PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 12099 3911 12076 3886 12111 3901 12128 TIME...MOT...LOC 0045Z 219DEG 20KT 3901 12111 $$ JCLAPP
1 follow-up statement
117 WWUS56 KSTO 230113 SVSSTO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SACRAMENTO CA 613 PM PDT MON OCT 22 2012 CAC017-057-061-230130- /O.CON.KSTO.TO.W.0006.000000T0000Z-121023T0130Z/ NEVADA CA-EL DORADO CA-PLACER CA- 613 PM PDT MON OCT 22 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR WESTERN PLACER...EXTREME NORTHWESTERN EL DORADO AND SOUTHWESTERN NEVADA COUNTIES... AT 610 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR ALTA SIERRA...OR 9 MILES SOUTH OF GRASS VALLEY...MOVING NORTHEAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEIMAR...COLFAX...CEDAR RIDGE...IOWA HILL...SUGAR PINE AND NEVADA CITY PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3933 12099 3911 12076 3886 12110 3901 12128 TIME...MOT...LOC 0112Z 219DEG 20KT 3911 12102 $$ CS
The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 5:00 PM PDT | Tornado Warning | STO | Nevada, Placer, Yuba | 45 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.