Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 43, NWS Phoenix, AZ

August 12, 2026La Paz County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 12, 2026, 10:36 PM MST for La Paz 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 12, 2026, 10:36 PM MST (05:36 UTC)
Expired: Aug 13, 2026, 1:30 AM MST
In force: 3 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 05:36 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, 5.6 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: 559 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 2150 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 36 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 Aug 12, 10:15 PM MST, 21 minutes earlier.

Area forecast discussion, Aug 12, 10:15 PM MST, 21 minutes before

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In the hours before

Local storm report, Aug 12, 9:41 PM MST, 55 minutes before

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Local storm report, Aug 12, 9:47 PM MST, 49 minutes before

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Special weather statement, Aug 12, 9:56 PM MST, 40 minutes before

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Local storm report, Aug 12, 9:59 PM MST, 37 minutes before

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Local storm report, Aug 12, 10:13 PM MST, 23 minutes before

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Local storm report, Aug 12, 10:18 PM MST, 18 minutes before

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      <p id="message1">
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      <p id="message2">
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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 12, 5:05 PM MST	Severe Thunderstorm Warning	PSR	La Paz	40 min
Aug 12, 5:13 PM MST	Special Weather Statement	PSR	Maricopa	32 min
Aug 12, 5:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 12, 5:24 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	7 hr
Aug 12, 5:45 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Aug 12, 5:48 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	27 min
Aug 12, 6:11 PM MST	Special Weather Statement	PSR	La Paz, Yuma	2 hr
Aug 12, 6:19 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	6 hr
Aug 12, 6:25 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	5 hr
Aug 12, 6:26 PM MST	Severe Thunderstorm Warning	PSR	La Paz	34 min
Aug 12, 6:40 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 12, 6:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	32 min
Aug 12, 7:08 PM MST	Severe Thunderstorm Warning	PSR	La Paz	37 min
Aug 12, 7:24 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	5 hr
Aug 12, 7:45 PM MST	Severe Thunderstorm Warning	PSR	La Paz	45 min
Aug 12, 8:19 PM MST	Areal Flood Advisory	PSR	Maricopa	79 min
Aug 12, 9:11 PM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	3 hr
Aug 12, 9:38 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 12, 9:56 PM MST	Special Weather Statement	PSR	La Paz	34 min
Aug 12, 10:11 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Aug 12, 10:48 PM MST	Special Weather Statement	PSR	La Paz	42 min
Aug 12, 11:33 PM MST	Extreme Heat Watch	PSR	La Paz, Maricopa, Pinal, Yuma	59 hr
Aug 13, 12:10 AM MST	Areal Flood Warning	PSR	La Paz	6 hr
Aug 13, 4:08 PM MST	Special Weather Statement	PSR	Maricopa	37 min
Aug 13, 4:24 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	36 min
Aug 13, 4:40 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 13, 4:46 PM MST	Special Weather Statement	PSR	Maricopa	29 min
Aug 13, 4:54 PM MST	Special Weather Statement	PSR	Maricopa	36 min
Aug 12, 5:08 PM MST	Dust Storm Warning	PSR	Imperial, Riverside	52 min
Aug 12, 5:53 PM MST	Dust Storm Warning	PSR	Imperial, Riverside	67 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.