Alert archive / California / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 2, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Jul 22, 2021, 4:22 PM PDT for San Diego County, California. It was in force for 53 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 22, 2021, 4:22 PM PDT (23:22 UTC)
- Expired
- Jul 22, 2021, 5:15 PM PDT
- In force
- 53 min
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County San Diego County, CA
The radar
The San Diego radar (KNKX), 76 km from the middle of the area, began a volume at 23:22 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, 11.4 hours before the alert went out and 95 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
- 1541 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- -8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
187
WUUS56 KSGX 222322
SVRSGX
CAC073-230015-
/O.NEW.KSGX.SV.W.0002.210722T2322Z-210723T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Diego CA
422 PM PDT Thu Jul 22 2021
The National Weather Service in San Diego has issued a
* Severe Thunderstorm Warning for...
Northeastern San Diego County in southwestern California...
* Until 515 PM PDT.
* At 422 PM PDT, a severe thunderstorm was located near Hwy S2
Between Shelter Valley And Agua Caliente, or 7 miles south of Hwy
78 Between S2 And Borrego Springs Rd, moving north at 35 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...
Borrego Springs, Hwy 78 Between S2 And Borrego Springs Rd, Hwy 78
Between Borrego Springs Rd And Ocotillo Wells, Hwy S2 Between
Shelter Valley And Agua Caliente, Hwy S22 Between Ranchita And
Borrego Springs, Hwy S2 Between Agua Caliente And Canebrake,
Borrego Palm Canyon, Hwy S22 Between Borrego Springs And Imperial
County Line, Fish Creek Wash and Agua Caliente.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3294 11626 3296 11647 3343 11645 3343 11616
3342 11615
TIME...MOT...LOC 2322Z 185DEG 29KT 3303 11636
HAIL...1.00IN
WIND...60MPH
$$
JMB2 follow-up statements
271
WWUS56 KSGX 222355
SVSSGX
Severe Weather Statement
National Weather Service San Diego CA
455 PM PDT Thu Jul 22 2021
CAC073-230015-
/O.CON.KSGX.SV.W.0002.000000T0000Z-210723T0015Z/
San Diego CA-
455 PM PDT Thu Jul 22 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM PDT
FOR NORTHEASTERN SAN DIEGO COUNTY...
At 454 PM PDT, a severe thunderstorm was located near Hwy 78 Between
Borrego Springs Rd And Ocotillo Wells, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Borrego Springs, Hwy 78 Between S2 And Borrego Springs Rd, Hwy 78
Between Borrego Springs Rd And Ocotillo Wells, Hwy S2 Between Shelter
Valley And Agua Caliente, Hwy S22 Between Ranchita And Borrego
Springs, Hwy S2 Between Agua Caliente And Canebrake, Borrego Palm
Canyon, Hwy S22 Between Borrego Springs And Imperial County Line,
Fish Creek Wash and Agua Caliente.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3294 11626 3296 11647 3343 11645 3343 11616
3342 11615
TIME...MOT...LOC 2354Z 211DEG 29KT 3313 11627
HAIL...0.75IN
WIND...60MPH
$$
JMB245
WWUS56 KSGX 230011
SVSSGX
Severe Weather Statement
National Weather Service San Diego CA
511 PM PDT Thu Jul 22 2021
CAC073-230021-
/O.EXP.KSGX.SV.W.0002.000000T0000Z-210723T0015Z/
San Diego CA-
511 PM PDT Thu Jul 22 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SAN DIEGO COUNTY
WILL EXPIRE AT 515 PM PDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 3294 11626 3296 11647 3343 11645 3343 11616
3342 11615
TIME...MOT...LOC 0011Z 185DEG 29KT 3327 11626
$$
JMBThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 3:45 PM PDT | Flash Flood Warning | SGX | San Diego | 2 hr |
| Jul 22, 4:18 PM PDT | Flash Flood Warning | SGX | San Diego | 117 min |
| Jul 22, 4:23 PM PDT | Flash Flood Warning | SGX | Riverside | 2 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.