Alert archive / Arizona / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 60, NWS Phoenix, AZ

August 11, 2026Maricopa County, Arizona

NWS Phoenix, AZ issued this severe thunderstorm warning at Aug 11, 2026, 2:00 AM MST for Maricopa County, Arizona. It was in force for 45 min. 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 11, 2026, 2:00 AM MST (09:00 UTC)
Expired: Aug 11, 2026, 2:45 AM MST
In force: 45 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 09:04 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, 9.0 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: 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 severe thunderstorm 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 severe thunderstorm warning went out at Aug 11, 1:49 AM MST, 11 minutes earlier.

Area forecast discussion, Aug 11, 1:49 AM MST, 11 minutes before

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In the hours before

Local storm report, Aug 10, 11:07 PM MST, 2 hours 53 minutes before

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Special weather statement, Aug 10, 11:51 PM MST, 2 hours 9 minutes before

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Special weather statement, Aug 11, 12:52 AM MST, 1 hour 8 minutes before

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Special weather statement, Aug 11, 1:19 AM MST, 41 minutes before

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Special weather statement, Aug 11, 1:37 AM MST, 23 minutes before

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Special weather statement, Aug 11, 1:54 AM MST, 6 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 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, 6:36 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
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, 2:09 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

Severe Thunderstorm Warnings in Arizona, 2026 Every severe thunderstorm 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.