Alert archive / Arizona / Flash Flood Warnings in 2023

Flash Flood Warning 11, NWS Phoenix, AZ

August 17, 2023La Paz County, Yuma County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 17, 2023, 9:15 PM MST for La Paz County, Yuma County, Arizona. 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: Aug 17, 2023, 9:15 PM MST (04:15 UTC)
Expired: Aug 18, 2023, 12:15 AM MST
In force: 3 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties La Paz County, AZ, Yuma County, AZ

The radar

The Yuma radar (KYUX), 107 km from the middle of the area, began a volume at 04:15 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 17, 5:45 PM MST, 3 hours 30 minutes earlier.

Area forecast discussion, Aug 17, 5:45 PM MST, 3 hours 30 minutes before

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In the hours before

Special weather statement, Aug 17, 4:57 PM MST, 4 hours 18 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
457 PM MST Thu Aug 17 2023

AZZ538-539-559-180045-
Sonoran Desert Natl Monument AZ-Tonopah Desert AZ-Gila Bend AZ-
457 PM MST Thu Aug 17 2023

...A cluster of strong thunderstorms will impact portions of
Maricopa County through 545 PM MST...

At 457 PM MST, Doppler radar was tracking strong thunderstorms over
Gila Bend Auxiliary Field, or near Gila Bend, moving north at 15 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Gila Bend, Gila Bend Auxiliary Field, Bosque, and Cotton Center.

This includes the following highways...
AZ Interstate 8 between mile markers 103 and 129.
AZ Route 238 between mile markers 1 and 10.
AZ Route 85 between mile markers 1 and 20, and between mile markers
119 and 132.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3257 11241 3256 11281 3302 11300 3314 11256
TIME...MOT...LOC 2357Z 164DEG 13KT 3287 11270

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

MS

Special weather statement, Aug 17, 6:57 PM MST, 2 hours 18 minutes before

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Local storm report, Aug 17, 7:27 PM MST, 1 hour 48 minutes before

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Local storm report, Aug 17, 7:33 PM MST, 1 hour 42 minutes before

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Special weather statement, Aug 17, 7:34 PM MST, 1 hour 41 minutes before

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Local storm report, Aug 17, 7:50 PM MST, 1 hour 25 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 17, 5:06 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	39 min
Aug 17, 5:18 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	12 min
Aug 17, 5:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	32 min
Aug 17, 5:51 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	25 min
Aug 17, 6:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	34 min
Aug 17, 6:16 PM MST	Flash Flood Warning	PSR	Maricopa, Pinal	119 min
Aug 17, 6:57 PM MST	Special Weather Statement	PSR		33 min
Aug 17, 7:03 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	42 min
Aug 17, 7:34 PM MST	Special Weather Statement	PSR	La Paz	41 min
Aug 18, 1:18 PM MST	Wind Advisory	PSR	La Paz, Maricopa, Pinal, Yuma	60 hr
Aug 18, 4:09 PM MST	Special Weather Statement	PSR		36 min
Aug 18, 4:05 PM MST	Areal Flood Advisory	PSR	Riverside, San Bernardino	42 min
Aug 18, 4:47 PM MST	Flash Flood Warning Considerable damage threat	PSR	Riverside, San Bernardino	3 hr

Nearby

Flash Flood Warnings in Arizona, 2023 Every flash flood warning in 2023

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.