Alert archive / California / Tornado Warnings in 2021
Tornado Warning 2, NWS Sacramento, CA
NWS Sacramento, CA issued this tornado warning at Jan 4, 2021, 3:35 PM PST for Butte County, Tehama County, California. It was in force for 25 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
- Jan 4, 2021, 3:35 PM PST (23:35 UTC)
- Expired
- Jan 4, 2021, 4:00 PM PST
- In force
- 25 min
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Butte County, CA, Tehama County, CA
The radar
The Beale AFB radar (KBBX), 66 km from the middle of the area, began a volume at 23:36 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, 11.6 hours before the alert went out and 267 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
770
WFUS56 KSTO 042335
TORSTO
CAC007-103-050000-
/O.NEW.KSTO.TO.W.0002.210104T2335Z-210105T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sacramento CA
335 PM PST Mon Jan 4 2021
The National Weather Service in Sacramento has issued a
* Tornado Warning for...
East central Tehama County in northern California...
North central Butte County in northern California...
* Until 400 PM PST.
* At 334 PM PST, a severe thunderstorm capable of producing a tornado
was located 7 miles west of Butte Meadows, or 21 miles south of
Mineral, moving northeast at 20 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Butte Meadows around 350 PM PST.
Mill Creek around 355 PM PST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.
&&
LAT...LON 4002 12170 4011 12178 4021 12159 4009 12148
TIME...MOT...LOC 2334Z 235DEG 18KT 4008 12169
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
EH1 follow-up statement
899
WWUS56 KSTO 042353
SVSSTO
Severe Weather Statement
National Weather Service Sacramento CA
353 PM PST Mon Jan 4 2021
CAC007-103-050003-
/O.EXP.KSTO.TO.W.0002.000000T0000Z-210105T0000Z/
Tehama CA-Butte CA-
353 PM PST Mon Jan 4 2021
...THE TORNADO WARNING FOR EAST CENTRAL TEHAMA AND NORTH CENTRAL
BUTTE COUNTIES WILL EXPIRE AT 400 PM PST...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.
LAT...LON 4002 12170 4011 12178 4021 12159 4009 12148
TIME...MOT...LOC 2353Z 235DEG 18KT 4013 12160
$$
EHThe office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 4, 2:38 AM PST | Flash Flood Watch | STO | 15 hr | |
| Jan 4, 1:30 PM PST | Special Weather Statement | STO | Tehama | 45 min |
| Jan 4, 1:34 PM PST | Special Weather Statement | STO | Shasta | 41 min |
| Jan 4, 2:28 PM PST | Special Weather Statement | STO | Tehama | 47 min |
| Jan 4, 2:38 PM PST | Tornado Warning | STO | Tehama | 21 min |
Nearby
Tornado Warnings in California, 2021Every tornado warning in 2021Tornadoes in 2021
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.