Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 32, NWS Phoenix, AZ

August 9, 2026Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 9, 2026, 11:19 PM MST for Maricopa 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 9, 2026, 11:19 PM MST (06:19 UTC)
Expired: Aug 10, 2026, 2:15 AM MST
In force: 3 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 06:22 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, 6.3 hours before the alert went out and 49 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: 574 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 3069 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 18 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 9, 11:00 PM MST, 19 minutes earlier.

Area forecast discussion, Aug 9, 11:00 PM MST, 19 minutes before

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In the hours before

Local storm report, Aug 9, 9:40 PM MST, 1 hour 39 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
940 PM MST Sun Aug 9 2026

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

0921 PM     Hail             6 WNW Goodyear          33.46N 112.50W
08/09/2026  E1.25 Inch       Maricopa           AZ   Trained Spotter

            Reported slightly smaller than golf ball
            sized hail. Rounded down to half dollar size
            based on radar.

&&

SB

Local storm report, Aug 9, 9:41 PM MST, 1 hour 38 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
941 PM MST Sun Aug 9 2026

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

0935 PM     Tstm Wnd Gst     5 WNW Buckeye           33.42N 112.68W
08/09/2026  M62 MPH          Maricopa           AZ   AWOS

            AWOS station KBXK Buckeye.

&&

SB

Local storm report, Aug 9, 9:42 PM MST, 1 hour 37 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
942 PM MST Sun Aug 9 2026

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

0930 PM     Tstm Wnd Gst     6 WNW Goodyear          33.46N 112.51W
08/09/2026  M84 MPH          Maricopa           AZ   Mesonet

            Mesonet station GW6437 BUCKEYE.

&&

SB

Special weather statement, Aug 9, 9:50 PM MST, 1 hour 29 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
950 PM MST Sun Aug 9 2026

AZZ534-538-100530-
Aguila Valley AZ-Tonopah Desert AZ-
950 PM MST Sun Aug 9 2026

...STRONG THUNDERSTORMS WILL IMPACT MARICOPA COUNTY THROUGH 1030 PM
MST...

At 950 PM MST, Doppler radar was tracking a cluster of strong
thunderstorms 8 miles southwest of Wickenburg, moving west at 15 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch 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...
Wickenburg.

This includes US Highway 60 between mile markers 88 and 110.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3371 11273 3371 11313 3400 11311 3400 11272
TIME...MOT...LOC 0450Z 101DEG 11KT 3389 11286

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

TW

Local storm report, Aug 9, 10:01 PM MST, 1 hour 18 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
1001 PM MST Sun Aug 9 2026

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

0900 PM     Tstm Wnd Gst     3 ENE Avondale          33.45N 112.31W
08/09/2026  M57 MPH          Maricopa           AZ   Mesonet

            Mesonet station FW3161 Avondale.

&&

SB

Local storm report, Aug 9, 10:10 PM MST, 1 hour 9 minutes before

Preliminary Local Storm Report
National Weather Service Phoenix AZ
1010 PM MST Sun Aug 9 2026

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

0920 PM     Tstm Wnd Gst     22 SSW Gila Bend        32.64N 112.84W
08/09/2026  M50 MPH          Maricopa           AZ   Mesonet

            Mesonet station BRG2 Range 2.

&&

SB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 5:10 PM MST	Special Weather Statement	PSR		35 min
Aug 9, 5:20 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Pinal	3 hr
Aug 9, 5:29 PM MST	Special Weather Statement	PSR		2 hr
Aug 9, 5:56 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	49 min
Aug 9, 6:00 PM MST	Severe Thunderstorm Warning	PSR	Pinal	30 min
Aug 9, 6:24 PM MST	Special Weather Statement	PSR	Yuma	51 min
Aug 9, 6:26 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	49 min
Aug 9, 6:33 PM MST	Severe Thunderstorm Warning	PSR	Yuma	27 min
Aug 9, 6:59 PM MST	Severe Thunderstorm Warning	PSR	Yuma	31 min
Aug 9, 7:09 PM MST	Severe Thunderstorm Warning	PSR	La Paz	36 min
Aug 9, 7:16 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	89 min
Aug 9, 7:20 PM MST	Special Weather Statement	PSR	Pinal	25 min
Aug 9, 7:44 PM MST	Severe Thunderstorm Warning	PSR	La Paz	17 min
Aug 9, 7:50 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	55 min
Aug 9, 7:59 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	61 min
Aug 9, 8:13 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	32 min
Aug 9, 8:40 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	35 min
Aug 9, 8:43 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	6 hr
Aug 9, 8:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	47 min
Aug 9, 9:06 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	39 min
Aug 9, 9:21 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 9, 9:26 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	20 min
Aug 9, 9:29 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 9, 9:31 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	26 min
Aug 9, 9:41 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	Maricopa	49 min
Aug 9, 9:50 PM MST	Special Weather Statement	PSR		40 min
Aug 9, 9:54 PM MST	Dust Storm Warning	PSR	La Paz, Maricopa	66 min
Aug 9, 9:56 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Aug 9, 10:02 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	Maricopa	28 min
Aug 9, 10:13 PM MST	Areal Flood Advisory	PSR	Maricopa	40 min
Aug 9, 10:13 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	47 min
Aug 9, 10:29 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	46 min
Aug 9, 10:36 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	39 min
Aug 9, 10:50 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	40 min
Aug 9, 10:53 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 9, 11:15 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 9, 11:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	14 min
Aug 9, 11:17 PM MST	Severe Thunderstorm Warning	PSR	La Paz	43 min
Aug 9, 11:27 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	33 min
Aug 9, 11:38 PM MST	Severe Thunderstorm Warning	PSR	La Paz	52 min
Aug 9, 11:51 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Aug 10, 12:37 AM MST	Areal Flood Advisory	PSR	La Paz	113 min
Aug 10, 12:54 AM MST	Special Weather Statement	PSR	La Paz	36 min
Aug 10, 12:59 AM MST	Special Weather Statement	PSR		31 min
Aug 10, 4:32 PM MST	Special Weather Statement	PSR		28 min
Aug 10, 4:36 PM MST	Severe Thunderstorm Warning	PSR	Imperial	24 min
Aug 10, 4:58 PM MST	Severe Thunderstorm Warning	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.