Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 14, NWS Phoenix, AZ

July 17, 2026Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 17, 2026, 7:59 AM MST for Maricopa 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: Jul 17, 2026, 7:59 AM MST (14:59 UTC)
Expired: Jul 17, 2026, 12:00 PM MST
In force: 4 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 15:01 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 12:00Z, 3.0 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: 57 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1188 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 59 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 17, 3:54 AM MST, 4 hours 5 minutes earlier.

Area forecast discussion, Jul 17, 3:54 AM MST, 4 hours 5 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
Jul 16, 5:09 PM MST	Special Weather Statement	PSR		36 min
Jul 16, 5:34 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	116 min
Jul 16, 5:54 PM MST	Areal Flood Advisory	PSR	Gila	2 hr
Jul 16, 6:30 PM MST	Special Weather Statement	PSR		30 min
Jul 16, 6:34 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	14 min
Jul 16, 6:38 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 16, 6:48 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	4 hr
Jul 16, 7:01 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa	3 hr
Jul 16, 7:05 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	55 min
Jul 16, 7:16 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	5 hr
Jul 16, 7:27 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jul 16, 7:43 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa, Pinal	4 hr
Jul 16, 7:51 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jul 16, 8:37 PM MST	Areal Flood Advisory	PSR	Gila, Pinal	4 hr
Jul 16, 9:04 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 16, 9:16 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jul 16, 9:24 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 16, 9:36 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	3 hr
Jul 16, 9:48 PM MST	Areal Flood Advisory	PSR	Maricopa	117 min
Jul 16, 10:03 PM MST	Areal Flood Advisory	PSR	Maricopa	19 min
Jul 16, 10:22 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 16, 10:45 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	3 hr
Jul 17, 12:30 AM MST	Flash Flood Warning	PSR	Maricopa	2 hr
Jul 17, 2:33 AM MST	Areal Flood Warning	PSR	Maricopa	95 min
Jul 17, 7:36 AM MST	Areal Flood Advisory	PSR	Maricopa	23 min
Jul 17, 11:17 AM MST	Areal Flood Advisory	PSR	Gila	3 hr
Jul 17, 11:31 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Jul 17, 11:48 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 17, 3:08 PM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	3 hr
Jul 17, 3:50 PM MST	Special Weather Statement	PSR	La Paz	25 min
Jul 17, 4:10 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Jul 17, 4:17 PM MST	Severe Thunderstorm Warning	PSR	La Paz	28 min
Jul 17, 4:50 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 17, 4:53 PM MST	Special Weather Statement	PSR	La Paz	37 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.