Alert archive / California / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 1, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Mar 23, 2021, 4:32 PM PDT for Riverside County, California. It was in force for 40 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
- Mar 23, 2021, 4:32 PM PDT (23:32 UTC)
- Expired
- Mar 23, 2021, 5:12 PM PDT
- In force
- 40 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Riverside County, CA
The radar
The San Diego radar (KNKX), 114 km from the middle of the area, began a volume at 23:34 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
San Diego, CA (KNKX), launched 12:00Z, 11.5 hours before the alert went out and 134 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 560 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
859
WUUS56 KSGX 232332
SVRSGX
CAC065-240030-
/O.NEW.KSGX.SV.W.0001.210323T2332Z-210324T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Diego CA
432 PM PDT Tue Mar 23 2021
The National Weather Service in San Diego has issued a
* Severe Thunderstorm Warning for...
Riverside County in southern California...
* Until 530 PM PDT.
* At 427 PM PDT, showers producing severe wind gusts to 60 mph was
located over Thermal, moving southeast at 20 mph. A wind gust of
60 mph was just recorded at Jacqueline Cochran Regional Airport.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees. Blowing dust
producing sudden restrictions to visibility is possible.
* Locations impacted include...
Southeastern Indio, Coachella, Thermal, La Quinta, Mecca and Santa
Rosa Mountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3351 11597 3352 11605 3351 11605 3351 11607
3350 11608 3345 11604 3342 11604 3342 11607
3358 11634 3379 11616 3370 11594 3352 11595
TIME...MOT...LOC 2327Z 301DEG 17KT 3361 11612
HAIL...<.75IN
WIND...60MPH
$$
Gregoria1 follow-up statement
819
WWUS56 KSGX 240012
SVSSGX
Severe Weather Statement
National Weather Service San Diego CA
512 PM PDT Tue Mar 23 2021
CAC065-240021-
/O.CAN.KSGX.SV.W.0001.000000T0000Z-210324T0030Z/
Riverside CA-
512 PM PDT Tue Mar 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR RIVERSIDE COUNTY IS
CANCELLED...
Winds have weakened below severe levels. Therefore, the warning has
been cancelled.
LAT...LON 3351 11597 3352 11605 3351 11605 3351 11607
3350 11608 3345 11604 3342 11604 3342 11607
3358 11634 3379 11616 3370 11594 3352 11595
TIME...MOT...LOC 0006Z 301DEG 17KT 3350 11590
$$
GregoriaThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 12:15 PM PDT | Wind Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 24 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.