Alert archive / California / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 6, NWS San Diego, CA
NWS San Diego, CA issued this severe thunderstorm warning at Aug 16, 2023, 2:02 PM PDT for San Diego County, California. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2023, 2:02 PM PDT (21:02 UTC)
- Expired
- Aug 16, 2023, 2:30 PM PDT
- In force
- 28 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), 28 km from the middle of the area, began a volume at 21:04 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, 9.0 hours before the alert went out and 47 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
- 2069 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 16, 9:32 AM PDT, 4 hours 30 minutes earlier.
Area forecast discussion, Aug 16, 9:32 AM PDT, 4 hours 30 minutes before
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</html>In the hours before
Special weather statement, Aug 16, 12:23 PM PDT, 1 hour 39 minutes before
Special Weather Statement
National Weather Service San Diego CA
1223 PM PDT Wed Aug 16 2023
CAZ055-060-162000-
Apple and Lucerne Valleys CA-San Bernardino County Mountains CA-
1223 PM PDT Wed Aug 16 2023
...A strong thunderstorm will impact portions of San Bernardino
County through 100 PM PDT...
At 1223 PM PDT, Doppler radar was tracking a strong thunderstorm near
Hwy 18 Between Running Springs And Big Bear, or 8 miles west of Big
Bear City, moving northwest at 15 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Big Bear City, Lake Arrowhead, Big Bear Lake, Running Springs, Seven
Oaks, Hwy 18 Between Running Springs And Big Bear, Hwy 38 Between
Yucaipa And Onyx Summit, Green Valley Lake, Cedar Glen, and Fawnskin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3424 11684 3415 11697 3427 11719 3440 11697
TIME...MOT...LOC 1923Z 135DEG 13KT 3424 11698
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
EASpecial weather statement, Aug 16, 1:09 PM PDT, 53 minutes before
Special Weather Statement
National Weather Service San Diego CA
109 PM PDT Wed Aug 16 2023
CAZ048-056-061-065-162045-
Riverside County Mountains CA-San Gorgonio Pass Near Banning CA-
Coachella Valley CA-San Bernardino and Riverside County Valleys-
The Inland Empire CA-
109 PM PDT Wed Aug 16 2023
...A strong thunderstorm will impact portions of Riverside County
through 145 PM PDT...
At 109 PM PDT, Doppler radar was tracking a strong thunderstorm over
Hwy 74 Between Mountain Center And Anza, or near Idyllwild-Pine Cove,
moving northwest at 10 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Palm Springs, Mt San Jacinto State Park, Idyllwild-Pine Cove, Hwy 243
Between Banning And Idyllwild, Hwy 74 Between Hemet And Mountain
Center, Hwy 74 Between Mountain Center And Anza, Mountain Center, and
Lake Hemet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3368 11650 3360 11664 3373 11683 3386 11662
TIME...MOT...LOC 2009Z 138DEG 10KT 3370 11663
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
EASpecial weather statement, Aug 16, 1:36 PM PDT, 26 minutes before
Special Weather Statement
National Weather Service San Diego CA
136 PM PDT Wed Aug 16 2023
CAZ056-065-162100-
Riverside County Mountains CA-San Gorgonio Pass Near Banning CA-
136 PM PDT Wed Aug 16 2023
...A strong thunderstorm will impact portions of Riverside County
through 200 PM PDT...
At 135 PM PDT, Doppler radar was tracking a strong thunderstorm near
Hwy 243 Between Banning And Idyllwild, moving northwest at 10 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Northwestern Palm Springs, Mt San Jacinto State Park, Hwy 243 Between
Banning And Idyllwild, Cabazon, Whitewater, and Morongo Indian
Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3385 11662 3377 11674 3384 11690 3395 11672
TIME...MOT...LOC 2035Z 132DEG 7KT 3384 11674
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
EASpecial weather statement, Aug 16, 1:45 PM PDT, 17 minutes before
Special Weather Statement
National Weather Service San Diego CA
145 PM PDT Wed Aug 16 2023
CAZ050-058-162130-
San Diego County Mountains CA-San Diego County Inland Valleys CA-
145 PM PDT Wed Aug 16 2023
...A strong thunderstorm will impact portions of south central San
Diego County through 230 PM PDT...
At 145 PM PDT, Doppler radar was tracking a strong thunderstorm near
Pine Valley, or 7 miles west of I-8 Between Pine Valley And
Boulevard, moving north at 10 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Alpine, Cuyamaca Rancho State Park, Lake Morena, Potrero, Pine
Valley, Descanso, Campo, Viejas Indian Reservation, Barrett Lake,
Japatul Valley, Guatay, Tecate, Skye Valley, and Dulzura.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3260 11651 3259 11665 3286 11672 3289 11652
TIME...MOT...LOC 2045Z 171DEG 7KT 3278 11659
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
EAThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 5:40 PM PDT | Special Weather Statement | SGX | San Diego | 35 min |
| Aug 16, 12:23 PM PDT | Special Weather Statement | SGX | 37 min | |
| Aug 16, 1:09 PM PDT | Special Weather Statement | SGX | 36 min | |
| Aug 16, 1:36 PM PDT | Special Weather Statement | SGX | 24 min | |
| Aug 16, 1:45 PM PDT | Special Weather Statement | SGX | San Diego | 45 min |
| Aug 16, 2:18 PM PDT | Areal Flood Advisory | SGX | San Diego | 2 hr |
| Aug 16, 2:25 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 35 min |
| Aug 16, 2:39 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 111 min |
| Aug 16, 2:42 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 16, 3:06 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 114 min |
| Aug 16, 3:36 PM PDT | Areal Flood Advisory | SGX | Riverside | 114 min |
| Aug 16, 3:53 PM PDT | Special Weather Statement | SGX | San Diego | 37 min |
| Aug 16, 3:56 PM PDT | Special Weather Statement | SGX | 49 min | |
| Aug 16, 4:21 PM PDT | Special Weather Statement | SGX | San Diego | 39 min |
| Aug 16, 4:31 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Diego | 29 min |
| Aug 16, 4:48 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 3 hr |
Nearby
Severe Thunderstorm Warnings in California, 2023Every severe thunderstorm warning in 2023
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.