Alert archive / California / Flash Flood Warnings in 2022
Flash Flood Warning 21, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Aug 12, 2022, 11:43 PM PDT for Riverside County, California. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 12, 2022, 11:43 PM PDT (06:43 UTC)
- Expired
- Aug 13, 2022, 2:45 AM PDT
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Riverside County, CA
The radar
The San Diego radar (KNKX), 115 km from the middle of the area, began a volume at 06:42 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 13, 2:00 AM PDT | HEAVY RAIN 0.91 | 3 Sw Mecca, CA | KENT SEA FARMS NEAR MECCA RECORDED 0.91 INCHES OF RAINFALL OVERNIGHT FROM AN MCS THAT MOVED SOUTHWARD FROM JOSHUA TREE INTO THE LOWER DESERTS. MRMS QPE SHOWED MUCH HEAVIER RAIN FELL OVER AREAS BETWEEN MECCA AND INTERSTATE 10 WITH BASIN AVERAGE OF 1.5-2.5 INCHE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 6.7 hours before the alert went out and 135 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
- 3647 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
814
WGUS56 KSGX 130643
FFWSGX
CAC065-130945-
/O.NEW.KSGX.FF.W.0021.220813T0643Z-220813T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Diego CA
1143 PM PDT Fri Aug 12 2022
The National Weather Service in San Diego has issued a
* Flash Flood Warning for...
Riverside County in southern California...
* Until 245 AM PDT.
* At 1143 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain east of Indio along Interstate 10 to Mecca. Between 1
and 1.5 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Coachella, Thermal, Mecca, Interstate 10 east of Indio.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3343 11603 3343 11620 3353 11626 3381 11610
3374 11600 3374 11595 3351 11595 3352 11605
3351 11605 3351 11607 3348 11606 3345 11604
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Gregoria3 follow-up statements
262
WGUS76 KSGX 130717
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
1217 AM PDT Sat Aug 13 2022
CAC065-130945-
/O.CON.KSGX.FF.W.0021.000000T0000Z-220813T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
1217 AM PDT Sat Aug 13 2022
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM PDT EARLY THIS
MORNING FOR RIVERSIDE COUNTY...
At 1217 AM PDT, Doppler radar indicated thunderstorms producing
heavy rain over areas east and south of Indio, including along
Interstate 10. Up to 2 inches of rain has fallen in the past hour
just northeast of Mecca. The heaviest rain is now occurring south of
Mecca. Additional rainfall amounts up to 1 inch is possible. Flash
flooding is likely ongoing over the warned area.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Box Canyon, Interstate 10 east of Indio, Coachella, Thermal, and
Mecca.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3343 11603 3343 11620 3353 11626 3381 11610
3374 11600 3374 11595 3351 11595 3352 11605
3351 11605 3351 11607 3348 11606 3345 11604
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Gregoria853
WGUS76 KSGX 130906
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
206 AM PDT Sat Aug 13 2022
CAC065-130945-
/O.CON.KSGX.FF.W.0021.000000T0000Z-220813T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
206 AM PDT Sat Aug 13 2022
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM PDT EARLY THIS
MORNING FOR RIVERSIDE COUNTY...
At 206 AM PDT, Doppler radar indicated that the heavy rainfall has
subsided, but rain continues to fall over the area. Additional
rainfall of up to a half an inch is possible. Flash flooding is
likely ongoing from the recent heavy rainfall.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Coachella, Thermal, Mecca, Interstate 10 east of Indio and Box
Canyon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
&&
LAT...LON 3343 11603 3343 11620 3353 11626 3381 11610
3374 11600 3374 11595 3351 11595 3352 11605
3351 11605 3351 11607 3348 11606 3345 11604
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Gregoria807
WGUS76 KSGX 130940
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
240 AM PDT Sat Aug 13 2022
CAC065-130950-
/O.EXP.KSGX.FF.W.0021.000000T0000Z-220813T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
240 AM PDT Sat Aug 13 2022
...FLASH FLOOD WARNING WILL EXPIRE AT 245 AM PDT EARLY THIS MORNING
FOR RIVERSIDE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 800 PM PDT Saturday for a
portion of Southwest California.
LAT...LON 3343 11603 3343 11620 3353 11626 3381 11610
3374 11600 3374 11595 3351 11595 3352 11605
3351 11605 3351 11607 3348 11606 3345 11604
$$
GregoriaThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 5:29 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 12, 11:21 PM PDT | Special Weather Statement | SGX | Riverside | 39 min |
| Aug 13, 12:33 AM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 13, 2:32 AM PDT | Flood Watch | SGX | Riverside, San Bernardino, San Diego | 16 hr |
| Aug 13, 12:07 PM PDT | Areal Flood Advisory | SGX | San Diego | 118 min |
| Aug 13, 12:19 PM PDT | Special Weather Statement | SGX | San Diego | 41 min |
| Aug 13, 12:47 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 58 min |
| Aug 13, 1:01 PM PDT | Areal Flood Advisory | SGX | Riverside, San Bernardino | 117 min |
| Aug 13, 1:05 PM PDT | Special Weather Statement | SGX | San Diego | 40 min |
| Aug 13, 1:32 PM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 118 min |
| Aug 13, 2:01 PM PDT | Special Weather Statement | SGX | San Diego | 44 min |
| Aug 13, 2:21 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 54 min |
| Aug 13, 2:25 PM PDT | Areal Flood Advisory | SGX | San Diego | 119 min |
| Aug 13, 3:05 PM PDT | Flash Flood Warning | SGX | San Diego | 3 hr |
| Aug 13, 3:43 PM PDT | Areal Flood Advisory | SGX | San Bernardino | 119 min |
| Aug 13, 4:32 PM PDT | Special Weather Statement | SGX | 43 min |
Nearby
Flash Flood Warnings in California, 2022Every flash flood warning in 2022
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.