Alert archive / California / Flash Flood Warnings in 2022

Flash Flood Warning 61, NWS Phoenix, AZ

July 31, 2022Riverside County, San Bernardino County, California

NWS Phoenix, AZ issued this flash flood warning at Jul 31, 2022, 10:53 AM PDT for Riverside County, San Bernardino County, California. It was in force for 2 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: Jul 31, 2022, 10:53 AM PDT (17:53 UTC)
Expired: Jul 31, 2022, 1:15 PM PDT
In force: 2 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Riverside County, CA, San Bernardino County, CA

The radar

The Santa Ana Mts radar (KSOX), 152 km from the middle of the area, began a volume at 17:57 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, 5.9 hours before the alert went out and 195 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1985 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Jul 31, 4:16 AM PDT, 6 hours 37 minutes earlier.

Area forecast discussion, Jul 31, 4:16 AM PDT, 6 hours 37 minutes before

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In the hours before

Local storm report, Jul 31, 9:06 AM PDT, 1 hour 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
906 AM MST SUN JUL 31 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1228 PM     FLASH FLOOD      1 SW MIAMI              33.39N 110.89W
07/28/2022                   GILA               AZ   PUBLIC

            A VIDEO POSTED ON SOCIAL MEDIA SHOWED STRONG
            FLOW MOVING ALONG THE BLOODY TANKS WASH,
            RESULTING A STREET CROSSING THE WASH NEAR
            MACKEY CAMP TO BE COMPLETELY IMPASSABLE.

&&

GL

Local storm report, Jul 31, 9:08 AM PDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PHOENIX AZ
908 AM MST SUN JUL 31 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0106 PM     FLASH FLOOD      2 ENE APACHE JUNCTION   33.43N 111.52W
07/28/2022                   PINAL              AZ   BROADCAST MEDIA

            CORRECTS PREVIOUS FLASH FLOOD REPORT FROM 2
            ENE APACHE JUNCTION. AN SUV WAS SWEPT AWAY
            IN A WASH AT THE INTERSECTION OF E TEPEE ST.
            AND N CORTEZ ROAD. THE WOMAN WAS EVENTUALLY
            RESCUED BUT HER DOG WENT MISSING.

&&

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 5:02 PM PDT	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	43 min
Jul 30, 5:11 PM PDT	Dust Storm Warning	PSR	Maricopa, Pinal	34 min
Jul 30, 5:19 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jul 30, 5:30 PM PDT	Areal Flood Advisory	PSR	Pinal	2 hr
Jul 30, 5:37 PM PDT	Dust Storm Advisory	PSR	Maricopa	38 min
Jul 30, 5:41 PM PDT	Severe Thunderstorm Warning	PSR	Gila, Maricopa	49 min
Jul 30, 5:46 PM PDT	Special Weather Statement	PSR	Maricopa	44 min
Jul 30, 5:49 PM PDT	Special Weather Statement	PSR	Maricopa	41 min
Jul 30, 5:53 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	4 hr
Jul 30, 5:57 PM PDT	Flash Flood Warning	PSR	Maricopa	4 hr
Jul 30, 5:57 PM PDT	Severe Thunderstorm Warning	PSR	Maricopa	48 min
Jul 30, 6:07 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jul 30, 6:18 PM PDT	Flash Flood Warning	PSR	Maricopa	6 hr
Jul 30, 6:20 PM PDT	Flash Flood Warning	PSR	Maricopa	6 hr
Jul 30, 6:24 PM PDT	Dust Storm Advisory	PSR	Maricopa	36 min
Jul 30, 6:30 PM PDT	Severe Thunderstorm Warning	PSR	Maricopa	45 min
Jul 30, 6:45 PM PDT	Flash Flood Warning	PSR	Maricopa	6 hr
Jul 30, 7:14 PM PDT	Special Weather Statement	PSR		31 min
Jul 30, 7:18 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 30, 7:57 PM PDT	Areal Flood Advisory	PSR	Maricopa	2 hr
Jul 30, 8:00 PM PDT	Special Weather Statement	PSR	Pinal	45 min
Jul 30, 8:18 PM PDT	Areal Flood Advisory	PSR	Pinal	3 hr
Jul 31, 1:09 PM PDT	Special Weather Statement	PSR		51 min
Jul 31, 2:06 PM PDT	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 31, 2:07 PM PDT	Special Weather Statement	PSR		38 min
Jul 31, 2:32 PM PDT	Areal Flood Advisory	PSR	Maricopa, Yuma	3 hr
Jul 31, 2:41 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	6 hr
Jul 31, 2:44 PM PDT	Dust Storm Warning	PSR	Maricopa, Pinal	69 min
Jul 31, 2:54 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 31, 3:03 PM PDT	Flash Flood Warning Considerable damage threat	PSR	La Paz	7 hr
Jul 31, 3:17 PM PDT	Dust Storm Advisory	PSR	Maricopa	88 min
Jul 31, 3:41 PM PDT	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 31, 4:17 PM PDT	Flash Flood Warning Considerable damage threat	PSR	Gila	5 hr
Jul 31, 4:22 PM PDT	Dust Storm Advisory	PSR	La Paz, Maricopa	68 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.