Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 22, NWS San Diego, CA
NWS San Diego, CA issued this flash flood warning at Sep 8, 2017, 5:33 PM PDT for Riverside 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 outline as issued.
The facts
- Issued
- Sep 8, 2017, 5:33 PM PDT (00:33 UTC)
- Expired
- Sep 8, 2017, 8:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS San Diego, CA
- Area
- Storm-based polygon
- 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 00:35 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 00:00Z, 0.6 hours before the alert went out and 134 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
- 2107 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
307
WGUS56 KSGX 090033
FFWSGX
CAC065-090330-
/O.NEW.KSGX.FF.W.0022.170909T0033Z-170909T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Diego CA
533 PM PDT FRI SEP 8 2017
The National Weather Service in San Diego has issued a
* Flash Flood Warning for...
Riverside County in southern California...
* Until 830 PM PDT
* At 530 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding will likely begin
shortly.
* Some locations that will likely experience flooding include...
Indio, Coachella, Palm Desert, Rancho Mirage, Thermal, Hwy 74
Between Anza And Palm Desert, La Quinta, Mecca, Indian Wells, Santa
Rosa Mountain and Bermuda Dunes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
&&
LAT...LON 3351 11597 3352 11605 3351 11605 3350 11608
3345 11604 3343 11604 3342 11607 3343 11639
3377 11645 3381 11609 3375 11601 3374 11595
3352 11595
$$
Small3 follow-up statements
481
WGUS76 KSGX 090112
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
612 PM PDT FRI SEP 8 2017
CAC065-090330-
/O.CON.KSGX.FF.W.0022.000000T0000Z-170909T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
612 PM PDT FRI SEP 8 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM PDT FOR
RIVERSIDE COUNTY...
At 607 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Flash flooding is likely.
Some locations that will likely experience flooding include...
Indio, Coachella, Palm Desert, Rancho Mirage, Thermal, Hwy 74 Between
Anza And Palm Desert, La Quinta, Mecca, Indian Wells, Santa Rosa
Mountain and Bermuda Dunes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life. Please
heed any road closures and avoid areas of flowing/ponding water on
roadways.
&&
LAT...LON 3351 11597 3352 11605 3351 11605 3350 11608
3345 11604 3343 11604 3342 11607 3343 11639
3377 11645 3381 11609 3375 11601 3374 11595
3352 11595
$$
Small218
WGUS76 KSGX 090223
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
723 PM PDT FRI SEP 8 2017
CAC065-090330-
/O.CON.KSGX.FF.W.0022.000000T0000Z-170909T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
723 PM PDT FRI SEP 8 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM PDT FOR
RIVERSIDE COUNTY...
At 706 PM PDT, Doppler radar indicated weakening thunderstorms
in the warned area. Flooding is still possible as the runoff
continues.
Some locations that will likely experience flooding include...
Indio, Coachella, Palm Desert, Rancho Mirage, Thermal, Hwy 74 Between
Anza And Palm Desert, La Quinta, Mecca, Indian Wells, Santa Rosa
Mountain and Bermuda Dunes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Residents as well as motorists driving through the area should heed
any road closures and avoid areas of flowing/ponding water on
roadways.
&&
LAT...LON 3351 11597 3352 11605 3351 11605 3350 11608
3345 11604 3343 11604 3342 11607 3343 11639
3377 11645 3381 11609 3375 11601 3374 11595
3352 11595
$$
Small896
WGUS76 KSGX 090323
FFSSGX
Flash Flood Statement
National Weather Service San Diego CA
823 PM PDT FRI SEP 8 2017
CAC065-090332-
/O.EXP.KSGX.FF.W.0022.000000T0000Z-170909T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Riverside CA-
823 PM PDT FRI SEP 8 2017
...THE FLASH FLOOD WARNING FOR RIVERSIDE COUNTY WILL EXPIRE AT 830 PM
PDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat at this time. Please continue to heed any remaining road
closures.
LAT...LON 3351 11597 3352 11605 3351 11605 3350 11608
3345 11604 3343 11604 3342 11607 3343 11639
3377 11645 3381 11609 3375 11601 3374 11595
3352 11595
$$
JJTThe office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 5:49 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 56 min |
| Sep 9, 1:36 PM PDT | Areal Flood Advisory | SGX | San Diego | 3 hr |
| Sep 9, 2:26 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 64 min |
| Sep 9, 3:49 PM PDT | Flash Flood Warning | SGX | Riverside | 3 hr |
Nearby
Flash Flood Warnings in California, 2017Every flash flood warning in 2017
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.