Alert archive / California / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Jul 30, 2021, 3:17 PM PDT for Riverside County, California. It was in force for 58 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
- Jul 30, 2021, 3:17 PM PDT (22:17 UTC)
- Expired
- Jul 30, 2021, 4:15 PM PDT
- In force
- 58 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Riverside County, CA
The radar
The San Diego radar (KNKX), 80 km from the middle of the area, began a volume at 22:19 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, 10.3 hours before the alert went out and 98 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
- 2147 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
076
WUUS56 KSGX 302217
SVRSGX
CAC065-302315-
/O.NEW.KSGX.SV.W.0004.210730T2217Z-210730T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Diego CA
317 PM PDT Fri Jul 30 2021
The National Weather Service in San Diego has issued a
* Severe Thunderstorm Warning for...
Riverside County in southern California...
* Until 415 PM PDT.
* At 316 PM PDT, a severe thunderstorm was located near Hwy 74
Between Mountain Center And Anza, or near Anza, moving southeast at
5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Southeastern Palm Springs, Idyllwild-Pine Cove, Anza, Hwy 243
Between Banning And Idyllwild, Hwy 74 Between Hemet And Mountain
Center, Hwy 74 Between Anza And Palm Desert, Hwy 74 Between
Mountain Center And Anza, Mountain Center, Cahuilla Indian
Reservation and Lake Hemet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3343 11668 3343 11672 3370 11688 3382 11671
3359 11641
TIME...MOT...LOC 2216Z 324DEG 8KT 3362 11668
HAIL...1.00IN
WIND...60MPH
$$
JMB1 follow-up statement
241
WWUS56 KSGX 302313
SVSSGX
Severe Weather Statement
National Weather Service San Diego CA
413 PM PDT Fri Jul 30 2021
CAC065-302316-
/O.EXP.KSGX.SV.W.0004.000000T0000Z-210730T2315Z/
Riverside CA-
413 PM PDT Fri Jul 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR RIVERSIDE COUNTY WILL EXPIRE
AT 415 PM PDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 3343 11668 3343 11672 3370 11688 3382 11671
3359 11641
TIME...MOT...LOC 2306Z 324DEG 8KT 3355 11662
$$
JMBThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 1:41 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 4 hr |
| Jul 30, 2:38 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 2 hr |
| Jul 30, 2:48 PM PDT | Areal Flood Advisory | SGX | Riverside | 3 hr |
| Jul 30, 2:54 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 3 hr |
| Jul 30, 3:48 PM PDT | Flash Flood Warning | SGX | Riverside | 3 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.