Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 33, NWS Phoenix, AZ

August 10, 2026La Paz County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 10, 2026, 6:36 PM MST for La Paz County, Arizona. 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 10, 2026, 6:36 PM MST (01:36 UTC)
Expired: Aug 10, 2026, 10:30 PM MST
In force: 4 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 151 km from the middle of the area, began a volume at 01:39 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

Phoenix, AZ (KPSR), launched 00:00Z, 1.6 hours before the alert went out and 189 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: 484 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 2675 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Aug 10, 6:23 PM MST, 13 minutes earlier.

Area forecast discussion, Aug 10, 6:23 PM MST, 13 minutes before

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In the hours before

Local storm report, Aug 10, 1:40 PM MST, 4 hours 56 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
140 PM MST Mon Aug 10 2026

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

0520 PM     Flash Flood      9 NW Miami              33.48N 111.00W
08/09/2026                   Gila               AZ   Other Federal

            ***DELAYED REPORT*** The Pinto Creek near
            Miami gage recorded a rapid rise of 6.7 ft,
            impacting nearby low water crossings
            upstream of the gage.

&&

INS

Local storm report, Aug 10, 1:42 PM MST, 4 hours 54 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
142 PM MST Mon Aug 10 2026

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

1126 PM     Flash Flood      5 SW Ak-Chin Village    32.97N 112.14W
08/09/2026                   Pinal              AZ   Dept of Highways

            ***DELAYED REPORT*** Val Vista Rd low water
            crossing at Vekol Wash was closed due to
            flooding.

&&

INS

Special weather statement, Aug 10, 4:32 PM MST, 2 hours 4 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
432 PM PDT Mon Aug 10 2026

CAZ562-566-567-110000-
Imperial County West CA-Imperial County Southwest CA-
Imperial Valley CA-
432 PM PDT Mon Aug 10 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN IMPERIAL COUNTY
THROUGH 500 PM PDT...

At 431 PM PDT, Doppler radar was tracking a strong thunderstorm over
Plaster City, moving north at 10 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Plaster City, Ocotillo, Dixieland, and Coyote Wells.

This includes the following highways...
CA Interstate 8 near mile marker 1, and between mile markers 3 and
24.
CA Route 98 between mile markers 1 and 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3293 11610 3293 11575 3264 11580 3263 11586
      3262 11610
TIME...MOT...LOC 2331Z 186DEG 11KT 3279 11589

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

KB

Special weather statement, Aug 10, 5:19 PM MST, 1 hour 17 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
519 PM MST Mon Aug 10 2026

AZZ533-110045-
Central La Paz AZ-
519 PM MST Mon Aug 10 2026

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL LA PAZ COUNTY THROUGH
545 PM MST...

At 518 PM MST, Doppler radar was tracking a strong thunderstorm near
Brenda, or 35 miles southeast of Parker, moving northwest at 20 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Quartzsite and Brenda.

This includes the following highways...
AZ Interstate 10 between mile markers 22 and 37.
US Highway 60 between mile markers 31 and 36.
AZ Route 95 between mile markers 112 and 115.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3364 11390 3356 11404 3374 11426 3387 11403
TIME...MOT...LOC 0018Z 140DEG 16KT 3366 11404

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

RW

Special weather statement, Aug 10, 5:44 PM MST, 52 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
544 PM MST Mon Aug 10 2026

AZZ533-110115-
Central La Paz AZ-
544 PM MST Mon Aug 10 2026

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL LA PAZ COUNTY THROUGH
615 PM MST...

At 544 PM MST, Doppler radar was tracking a strong thunderstorm near
Brenda, or 35 miles southeast of Parker, moving northwest at 10 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Quartzsite and Brenda.

This includes the following highways...
AZ Interstate 10 between mile markers 22 and 37.
US Highway 60 between mile markers 31 and 36.
AZ Route 95 between mile markers 112 and 115.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3358 11386 3352 11399 3373 11426 3385 11404
TIME...MOT...LOC 0044Z 137DEG 10KT 3366 11403

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

RW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 5:19 PM MST	Special Weather Statement	PSR	La Paz	26 min
Aug 10, 5:44 PM MST	Special Weather Statement	PSR	La Paz	31 min
Aug 10, 6:02 PM MST	Severe Thunderstorm Warning	PSR	La Paz	43 min
Aug 10, 7:03 PM MST	Severe Thunderstorm Warning	PSR	La Paz	27 min
Aug 10, 7:11 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	49 min
Aug 10, 7:35 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 10, 7:50 PM MST	Special Weather Statement	PSR		40 min
Aug 10, 7:56 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	49 min
Aug 10, 8:19 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Yuma	41 min
Aug 10, 9:08 PM MST	Special Weather Statement	PSR		52 min
Aug 10, 9:13 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	47 min
Aug 10, 9:28 PM MST	Dust Storm Advisory	PSR	Maricopa	62 min
Aug 10, 9:43 PM MST	Special Weather Statement	PSR	Yuma	32 min
Aug 10, 9:53 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	La Paz	37 min
Aug 10, 9:55 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	50 min
Aug 10, 10:10 PM MST	Special Weather Statement	PSR	Pinal	35 min
Aug 10, 10:17 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	28 min
Aug 10, 10:26 PM MST	Dust Storm Advisory	PSR	La Paz, Yuma	64 min
Aug 10, 10:43 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	32 min
Aug 10, 11:51 PM MST	Special Weather Statement	PSR		39 min
Aug 11, 12:18 AM MST	Areal Flood Advisory	PSR	Pinal	2 hr
Aug 11, 12:52 AM MST	Special Weather Statement	PSR	Maricopa	38 min
Aug 11, 1:19 AM MST	Special Weather Statement	PSR	Maricopa	26 min
Aug 11, 1:37 AM MST	Special Weather Statement	PSR	Maricopa	38 min
Aug 11, 1:54 AM MST	Special Weather Statement	PSR	Maricopa	36 min
Aug 11, 2:00 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	45 min
Aug 11, 2:09 AM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Aug 11, 2:20 AM MST	Special Weather Statement	PSR		40 min
Aug 11, 2:30 AM MST	Areal Flood Warning	PSR	Maricopa	3 hr
Aug 11, 2:51 AM MST	Special Weather Statement	PSR		39 min
Aug 11, 2:58 AM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	3 hr
Aug 11, 3:05 AM MST	Special Weather Statement	PSR	La Paz	40 min
Aug 11, 3:16 PM MST	Special Weather Statement	PSR		44 min
Aug 11, 4:26 PM MST	Special Weather Statement	PSR		49 min
Aug 10, 5:31 PM MST	Areal Flood Advisory	PSR	Imperial	3 hr
Aug 11, 3:25 PM MST	Severe Thunderstorm Warning	PSR	Riverside, San Bernardino	50 min
Aug 11, 4:43 PM MST	Special Weather Statement	PSR	Imperial	32 min

Nearby

Flash Flood Warnings in Arizona, 2026 Every flash flood warning in 2026

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.