Alert archive / Arizona / Flash Flood Warnings in 2025

Flash Flood Warning 80, NWS Phoenix, AZ

October 12, 2025Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Oct 12, 2025, 1:57 AM MST for Maricopa County, Pinal County, Arizona. It was in force for 8 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: Oct 12, 2025, 1:57 AM MST (08:57 UTC)
Expired: Oct 12, 2025, 10:00 AM MST
In force: 8 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Flood severity: None

Counties Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 29 km from the middle of the area, began a volume at 08:58 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 34 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1320 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 97 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 Oct 12, 1:10 AM MST, 47 minutes earlier.

Area forecast discussion, Oct 12, 1:10 AM MST, 47 minutes before

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In the hours before

Special weather statement, Oct 11, 9:20 PM MST, 4 hours 37 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <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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    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 9:20 PM MST	Special Weather Statement	PSR		25 min
Oct 11, 9:55 PM MST	Severe Thunderstorm Warning	PSR	Gila	15 min
Oct 12, 2:08 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Oct 12, 2:18 AM MST	Special Weather Statement	PSR	Pinal	42 min
Oct 12, 2:38 AM MST	Flash Flood Warning	PSR	Maricopa, Pinal	4 hr
Oct 12, 2:49 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	4 hr
Oct 12, 2:58 AM MST	Flash Flood Warning	PSR	Maricopa, Pinal	4 hr
Oct 12, 3:19 AM MST	Special Weather Statement	PSR		26 min
Oct 12, 3:34 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	26 min
Oct 12, 4:20 AM MST	Areal Flood Advisory	PSR	Maricopa	9 min
Oct 12, 4:29 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Oct 12, 6:16 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	6 hr
Oct 12, 6:42 AM MST	Areal Flood Warning	PSR	Maricopa, Pinal	3 hr
Oct 12, 6:50 AM MST	Areal Flood Warning	PSR	Maricopa, Pinal	63 min
Oct 12, 6:55 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Oct 12, 7:22 AM MST	Areal Flood Warning	PSR	Maricopa	5 hr
Oct 12, 7:39 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	5 hr
Oct 12, 7:46 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	5 hr
Oct 12, 7:48 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	105 min
Oct 12, 7:53 AM MST	Flash Flood Warning	PSR	Maricopa, Pinal	105 min
Oct 12, 7:56 AM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	5 hr
Oct 12, 8:43 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Pinal	4 hr
Oct 12, 9:02 AM MST	Flash Flood Warning Considerable damage threat	PSR	Pinal	3 hr
Oct 12, 9:26 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa, Pinal	3 hr
Oct 12, 9:33 AM MST	Areal Flood Warning	PSR	Maricopa	2 hr
Oct 12, 9:38 AM MST	Areal Flood Warning	PSR	Maricopa, Pinal	7 min
Oct 12, 10:28 AM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Oct 12, 10:35 AM MST	Flash Flood Warning EmergencyCatastrophic damage threat	PSR	Pinal	3 hr
Oct 12, 11:18 AM MST	Areal Flood Warning	PSR	Maricopa	3 hr
Oct 12, 12:51 PM MST	Areal Flood Warning	PSR	Maricopa, Pinal	8 hr
Oct 12, 1:23 PM MST	Areal Flood Warning	PSR	Gila	5 hr
Oct 12, 1:24 PM MST	Areal Flood Warning	PSR	Maricopa	5 hr
Oct 12, 1:44 PM MST	Areal Flood Warning	PSR	Pinal	3 hr
Oct 12, 2:02 PM MST	Areal Flood Warning	PSR	Gila	3 hr
Oct 12, 3:52 PM MST	Areal Flood Warning	PSR	Maricopa, Pinal	6 hr

Nearby

Flash Flood Warnings in Arizona, 2025 Every flash flood warning in 2025

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.