Alert archive / California / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 1, NWS Sacramento, CA
NWS Sacramento, CA issued this severe thunderstorm warning at Apr 25, 2021, 5:14 PM PDT for Tehama County, California. It was in force for 46 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
- Apr 25, 2021, 5:14 PM PDT (00:14 UTC)
- Expired
- Apr 25, 2021, 6:00 PM PDT
- In force
- 46 min
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Tehama County, CA
The radar
The Beale AFB radar (KBBX), 63 km from the middle of the area, began a volume at 00:14 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 |
|---|---|---|---|
| Apr 25, 5:44 PM PDT | TORNADO | 5 Nne Orland, CA | A BRIEF TORNADO TOUCHDOWN WAS OBSERVED IN A FARM FIELD IN CAPAY ON APRIL 25. NO DAMAGE HAS BEEN REPORTED. A VIDEO WITH SWIRLING DUST CONFIRMED THIS WAS A TORNADO. THE TORNADO WAS ONLY ON THE GROUND FOR ABOUT 15 SECONDS. |
| Apr 25, 5:46 PM PDT | TORNADO | 7 Ne Orland, CA | A TORNADO BRIEFLY TOUCHED DOWN ON POST AVE. BETWEEN 4TH AND 5TH AVE. IN CAPAY ON APRIL 25. MINOR DAMAGE WAS CAUSED TO 2 HOMES, INCLUDING ROOF TILES, A CARPORT ROOF, SHEDS AND SEVERAL TREES. AROUND 40 ORCHARD TREES SUFFERED LIMB DAMAGE OR WERE UPROOTED. THIS IS |
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, 0.2 hours before the alert went out and 250 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
- 36 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 647 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
593
WUUS56 KSTO 260014
SVRSTO
CAC103-260100-
/O.NEW.KSTO.SV.W.0001.210426T0014Z-210426T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sacramento CA
514 PM PDT Sun Apr 25 2021
The National Weather Service in Sacramento has issued a
* Severe Thunderstorm Warning for...
Central Tehama County in northern California...
* Until 600 PM PDT.
* At 511 PM PDT, a severe thunderstorm was located near Los Molinos,
or 10 miles northeast of Corning, moving northeast at 20 mph.
HAZARD...Quarter size hail. Signicant hail accumulations of
several inches possible along highway 99 near Los Molinos.
SOURCE...Radar indicated.
IMPACT...Damage to agriculture and hazardous driving.
* Locations impacted include...
Corning, Tehama, Richfield, Gerber-Las Flores, Vina and Los
Molinos.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 3981 12228 4005 12226 4031 12193 4017 12161
3991 12183 3990 12206 3981 12208
TIME...MOT...LOC 0011Z 239DEG 48KT 4004 12204
HAIL...1.00IN
WIND...<50MPH
$$
CS2 follow-up statements
369
WWUS56 KSTO 260046
SVSSTO
Severe Weather Statement
National Weather Service Sacramento CA
546 PM PDT Sun Apr 25 2021
CAC103-260100-
/O.CON.KSTO.SV.W.0001.000000T0000Z-210426T0100Z/
Tehama CA-
546 PM PDT Sun Apr 25 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM PDT
FOR SOUTH CENTRAL TEHAMA COUNTY...
At 545 PM PDT, a severe thunderstorm was located near Corning, moving
northeast at 15 mph.
HAZARD...Quarter size hail. Signicant hail accumulations of several
inches possible along highway 99 near Los Molinos and near
Corning.
SOURCE...Radar indicated.
IMPACT...Damage to agriculture and hazardous driving.
Locations impacted include...
Corning, Tehama, Richfield, Gerber-Las Flores, Vina and Los Molinos.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3981 12228 4005 12226 4017 12209 3995 12183
3991 12183 3990 12206 3981 12208
TIME...MOT...LOC 0045Z 240DEG 5KT 3991 12212
HAIL...1.00IN
WIND...<50MPH
$$
CS836
WWUS56 KSTO 260102
SVSSTO
Severe Weather Statement
National Weather Service Sacramento CA
602 PM PDT Sun Apr 25 2021
CAC103-260110-
/O.EXP.KSTO.SV.W.0001.000000T0000Z-210426T0100Z/
Tehama CA-
602 PM PDT Sun Apr 25 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL TEHAMA COUNTY
HAS EXPIRED...
The severe thunderstorm which prompted the warning has weakened.
Small accumulating hail will still be possible near Corning and Vina
through 630 pm.
LAT...LON 3981 12228 4005 12226 4017 12209 3995 12183
3991 12183 3990 12206 3981 12208
TIME...MOT...LOC 0100Z 239DEG 48KT 3997 12199
$$
CSThe office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:19 PM PDT | Special Weather Statement | STO | Butte | 56 min |
Nearby
Severe Thunderstorm Warnings in California, 2021Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.