Alert archive / California / Flash Flood Warnings in 2024
Flash Flood Warning 24, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Sep 8, 2024, 1:40 PM PDT for San Bernardino County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 8, 2024, 1:40 PM PDT (20:40 UTC)
- Expired
- Sep 8, 2024, 4:45 PM PDT
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County San Bernardino County, CA
The radar
The Edwards AFB radar (KEYX), 129 km from the middle of the area, began a volume at 20:40 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
Las Vegas, NV (KVEF), launched 12:00Z, 8.7 hours before the alert went out and 180 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
- 22 J/kg
- Mixed-layer CIN
- -378 J/kg
- Mixed-layer LCL
- 3428 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Sep 8, 9:34 AM PDT, 4 hours 6 minutes earlier.
Area forecast discussion, Sep 8, 9:34 AM PDT, 4 hours 6 minutes before
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</html>In the hours before
Special weather statement, Sep 8, 1:04 PM PDT, 36 minutes before
Special Weather Statement
National Weather Service San Diego CA
104 PM PDT Sun Sep 8 2024
CAZ048-057-082045-
San Bernardino and Riverside County Valleys-The Inland Empire CA-
Santa Ana Mountains and Foothills CA-
104 PM PDT Sun Sep 8 2024
...A STRONG THUNDERSTORM WILL IMPACT RIVERSIDE AND EAST CENTRAL
ORANGE COUNTIES THROUGH 145 PM PDT...
At 104 PM PDT, Doppler radar was tracking a strong thunderstorm near
Lake Elsinore. This thunderstorm was nearly stationary.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Temecula, Lake Elsinore, Murrieta, Perris, Sun City, Menifee, Ortega
Highway, Wildomar, Canyon Lake, Romoland, Lakeland Village, Quail
Valley, Santa Rosa Plateau, and Sedco Hills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3351 11742 3369 11745 3376 11717 3349 11713
TIME...MOT...LOC 2004Z 263DEG 4KT 3361 11735
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
MunyanSpecial weather statement, Sep 8, 1:14 PM PDT, 26 minutes before
Special Weather Statement
National Weather Service San Diego CA
114 PM PDT Sun Sep 8 2024
CAZ048-056-082100-
Riverside County Mountains CA-
San Bernardino and Riverside County Valleys-The Inland Empire CA-
114 PM PDT Sun Sep 8 2024
...A STRONG THUNDERSTORM WILL IMPACT RIVERSIDE COUNTY THROUGH 200 PM
PDT...
At 114 PM PDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Hemet. This thunderstorm was nearly stationary.
HAZARD...Wind gusts up to 50 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Temecula, Hemet, East Hemet, Hwy 74 Between Hemet And Mountain
Center, Valle Vista, Aguanga, Sage, Winchester, and Lake Skinner
Recreation Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3353 11691 3358 11709 3378 11708 3371 11678
TIME...MOT...LOC 2014Z 197DEG 3KT 3363 11699
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
MunyanThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 11:56 AM PDT | Areal Flood Advisory | SGX | San Bernardino | 119 min |
| Sep 8, 12:53 PM PDT | Areal Flood Advisory | SGX | Riverside | 2 hr |
| Sep 8, 1:00 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 119 min |
| Sep 8, 1:04 PM PDT | Special Weather Statement | SGX | Orange | 41 min |
| Sep 8, 1:09 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 51 min |
| Sep 8, 1:14 PM PDT | Special Weather Statement | SGX | 46 min | |
| Sep 8, 1:27 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 6 min |
| Sep 8, 1:27 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 63 min |
| Sep 8, 1:34 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 41 min |
| Sep 8, 1:55 PM PDT | Special Weather Statement | SGX | 50 min | |
| Sep 8, 2:01 PM PDT | Areal Flood Advisory | SGX | San Diego | 2 hr |
| Sep 8, 2:04 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Diego | 56 min |
| Sep 8, 2:12 PM PDT | Areal Flood Advisory | SGX | Riverside, San Diego | 2 hr |
| Sep 8, 2:13 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Sep 8, 2:15 PM PDT | Areal Flood Advisory | SGX | Riverside | 2 hr |
| Sep 8, 2:24 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 18 min |
| Sep 8, 2:27 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 48 min |
| Sep 8, 2:43 PM PDT | Flash Flood Warning | SGX | San Bernardino | 3 hr |
| Sep 8, 2:54 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 118 min |
| Sep 8, 2:54 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Sep 8, 2:58 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Diego | 47 min |
| Sep 8, 3:01 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Sep 8, 3:10 PM PDT | Severe Thunderstorm Warning | SGX | Riverside, San Bernardino | 50 min |
| Sep 8, 3:28 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Sep 8, 3:45 PM PDT | Special Weather Statement | SGX | Orange | 45 min |
| Sep 8, 3:52 PM PDT | Special Weather Statement | SGX | 38 min | |
| Sep 8, 3:54 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
| Sep 8, 3:59 PM PDT | Special Weather Statement | SGX | 46 min | |
| Sep 8, 4:07 PM PDT | Special Weather Statement | SGX | Orange | 38 min |
| Sep 8, 4:15 PM PDT | Special Weather Statement | SGX | Orange | 45 min |
| Sep 8, 4:22 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 53 min |
| Sep 8, 4:25 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 35 min |
| Sep 8, 4:37 PM PDT | Areal Flood Advisory | SGX | Riverside | 2 hr |
| Sep 8, 4:50 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 55 min |
Nearby
Flash Flood Warnings in California, 2024Every flash flood warning in 2024
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.