Alert archive / Arizona / Flash Flood Warnings in 2026

Flash Flood Warning 59, NWS Phoenix, AZ

August 31, 2026La Paz County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 31, 2026, 4:22 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 31, 2026, 4:22 PM MST (23:22 UTC)
Expired: Aug 31, 2026, 8:15 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 23:24 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, 11.4 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: 35 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 1765 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 31, 4:00 PM MST, 22 minutes earlier.

Area forecast discussion, Aug 31, 4:00 PM MST, 22 minutes before

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In the hours before

Local storm report, Aug 31, 1:52 PM MST, 2 hours 30 minutes before

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Local storm report, Aug 31, 1:53 PM MST, 2 hours 29 minutes before

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Special weather statement, Aug 31, 1:56 PM MST, 2 hours 26 minutes before

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Special weather statement, Aug 31, 3:31 PM MST, 51 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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Local storm report, Aug 31, 3:51 PM MST, 31 minutes before

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<body>
  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 30, 5:19 PM MST	Severe Thunderstorm Warning	PSR	La Paz	26 min
Aug 30, 6:32 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	28 min
Aug 30, 6:35 PM MST	Special Weather Statement	PSR	La Paz	40 min
Aug 30, 6:56 PM MST	Severe Thunderstorm Warning	PSR	La Paz	34 min
Aug 30, 7:27 PM MST	Severe Thunderstorm Warning	PSR	La Paz	33 min
Aug 30, 7:28 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	47 min
Aug 30, 7:37 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 30, 7:48 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	42 min
Aug 30, 7:54 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	51 min
Aug 30, 7:54 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	36 min
Aug 30, 7:57 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Maricopa	48 min
Aug 30, 8:15 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 30, 8:21 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	39 min
Aug 30, 8:23 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	52 min
Aug 30, 8:27 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	48 min
Aug 30, 8:34 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	26 min
Aug 30, 8:42 PM MST	Special Weather Statement	PSR	La Paz	48 min
Aug 30, 8:47 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 30, 8:52 PM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	4 hr
Aug 30, 9:00 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	28 min
Aug 30, 9:16 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Aug 30, 9:20 PM MST	Special Weather Statement	PSR	Maricopa	40 min
Aug 30, 9:20 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 30, 9:27 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	48 min
Aug 30, 9:35 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	40 min
Aug 30, 9:57 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	48 min
Aug 30, 10:38 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 30, 10:40 PM MST	Special Weather Statement	PSR		35 min
Aug 30, 11:02 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 31, 12:13 AM MST	Flood Watch	PSR	La Paz, Maricopa, Yuma	20 hr
Aug 31, 12:44 AM MST	Special Weather Statement	PSR	Pinal	46 min
Aug 31, 12:50 AM MST	Special Weather Statement	PSR	Pinal	40 min
Aug 31, 2:04 AM MST	Special Weather Statement	PSR	Gila	41 min
Aug 31, 1:33 PM MST	Severe Thunderstorm Warning	PSR	La Paz	42 min
Aug 31, 1:56 PM MST	Special Weather Statement	PSR	La Paz	34 min
Aug 31, 2:02 PM MST	Severe Thunderstorm Warning	PSR	La Paz	43 min
Aug 31, 2:13 PM MST	Severe Thunderstorm Warning	PSR	La Paz	32 min
Aug 31, 2:43 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	La Paz	47 min
Aug 31, 2:45 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 31, 3:19 PM MST	Dust Storm Advisory	PSR	La Paz, Yuma	56 min
Aug 31, 3:24 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	La Paz	51 min
Aug 31, 3:31 PM MST	Special Weather Statement	PSR	La Paz	29 min
Aug 31, 3:54 PM MST	Severe Thunderstorm Warning	PSR	La Paz	51 min
Aug 31, 4:13 PM MST	Severe Thunderstorm Warning Considerable damage threat	PSR	La Paz	47 min
Aug 31, 4:40 PM MST	Severe Thunderstorm Warning	PSR	La Paz	50 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.