Alert archive / California / Flash Flood Warnings in 2022

Flash Flood Warning 250, NWS Phoenix, AZ

August 24, 2022Imperial County, Riverside County, California

NWS Phoenix, AZ issued this flash flood warning at Aug 24, 2022, 5:49 PM PDT for Imperial County, Riverside County, California. It was in force for 4 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: Aug 24, 2022, 5:49 PM PDT (00:49 UTC)
Expired: Aug 24, 2022, 9:47 PM PDT
In force: 4 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Imperial County, CA, Riverside County, CA

The radar

The San Diego radar (KNKX), 137 km from the middle of the area, began a volume at 00:52 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 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 Phoenix, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 24, 5:08 PM PDT, 41 minutes earlier.

Area forecast discussion, Aug 24, 5:08 PM PDT, 41 minutes before

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In the hours before

Special weather statement, Aug 24, 5:22 PM PDT, 27 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
522 PM PDT Wed Aug 24 2022

CAZ564-569-570-250100-
Chuckwalla Mountains CA-Palo Verde Valley CA-Chuckwalla Valley CA-
522 PM PDT Wed Aug 24 2022

...Strong thunderstorms will impact portions of northeastern
Imperial and Riverside Counties through 600 PM PDT...

At 521 PM PDT, Doppler radar was tracking strong thunderstorms 17
miles west of Palo Verde, or 34 miles southeast of Desert Center,
moving northeast at 35 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Palo Verde.

This includes the following highways...
CA Interstate 10 between mile markers 127 and 128.
CA Route 78 between mile markers 58 and 67, and between mile markers
79 and 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3346 11467 3344 11470 3340 11473 3337 11473
      3308 11492 3322 11537 3363 11505
TIME...MOT...LOC 0021Z 207DEG 29KT 3333 11501

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

GL

Local storm report, Aug 24, 5:30 PM PDT, 19 minutes before

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Special weather statement, Aug 24, 5:43 PM PDT, 6 minutes before

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The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 24, 5:06 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz, Yuma	73 min
Aug 24, 5:23 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Yuma	64 min
Aug 24, 5:43 PM PDT	Special Weather Statement	PSR		47 min
Aug 24, 6:03 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz, Maricopa	97 min
Aug 24, 6:15 PM PDT	Severe Thunderstorm Warning	PSR	La Paz	45 min
Aug 24, 6:21 PM PDT	Special Weather Statement	PSR	La Paz	39 min
Aug 24, 6:35 PM PDT	Areal Flood Advisory	PSR	La Paz, Yuma	18 min
Aug 24, 6:37 PM PDT	Dust Storm Advisory	PSR	La Paz	23 min
Aug 24, 6:52 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz, Yuma	3 hr
Aug 24, 6:53 PM PDT	Severe Thunderstorm Warning	PSR	La Paz, Yuma	52 min
Aug 24, 7:45 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 24, 7:49 PM PDT	Severe Thunderstorm Warning	PSR	La Paz	41 min
Aug 24, 7:58 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz	5 hr
Aug 25, 12:01 AM PDT	Areal Flood Warning	PSR	La Paz	8 hr
Aug 25, 12:19 AM PDT	Special Weather Statement	PSR	Yuma	26 min
Aug 25, 12:31 AM PDT	Areal Flood Warning	PSR	La Paz	6 hr
Aug 25, 12:55 AM PDT	Special Weather Statement	PSR	Yuma	50 min
Aug 25, 12:57 AM PDT	Areal Flood Advisory	PSR	Yuma	3 hr
Aug 25, 2:04 PM PDT	Special Weather Statement	PSR	La Paz	41 min
Aug 25, 2:15 PM PDT	Special Weather Statement	PSR		45 min
Aug 25, 3:43 PM PDT	Dust Storm Advisory	PSR	Yuma	80 min
Aug 24, 5:22 PM PDT	Special Weather Statement	PSR	Imperial	38 min
Aug 24, 5:56 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	110 min
Aug 24, 5:59 PM PDT	Severe Thunderstorm Warning	PSR	Riverside	31 min
Aug 25, 12:56 AM PDT	Special Weather Statement	PSR	Imperial	34 min
Aug 25, 3:03 PM PDT	Areal Flood Advisory	PSR	Riverside	3 hr

Nearby

Flash Flood Warnings in California, 2022 Every 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; radar from the NEXRAD Level II archive.