Alert archive / Arizona / Flash Flood Warnings in 2025

Flash Flood Warning 52, NWS Phoenix, AZ

September 19, 2025Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Sep 19, 2025, 1:18 PM MST for Maricopa 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: Sep 19, 2025, 1:18 PM MST (20:18 UTC)
Expired: Sep 19, 2025, 4:20 PM MST
In force: 3 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 20:18 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.

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 Sep 19, 1:15 PM MST, 3 minutes earlier.

Area forecast discussion, Sep 19, 1:15 PM MST, 3 minutes before

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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.
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In the hours before

Local storm report, Sep 19, 9:25 AM MST, 3 hours 53 minutes before

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<html lang="en">
<head>
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  <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.
      </p>
    </section>
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Local storm report, Sep 19, 9:36 AM MST, 3 hours 42 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
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Special weather statement, Sep 19, 11:16 AM MST, 2 hours 2 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Sep 19, 12:56 PM MST, 22 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.
      </p>
    </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
Sep 18, 5:15 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	3 hr
Sep 18, 5:34 PM MST	Special Weather Statement	PSR		26 min
Sep 18, 5:54 PM MST	Special Weather Statement	PSR	Maricopa	36 min
Sep 18, 5:59 PM MST	Special Weather Statement	PSR		31 min
Sep 18, 6:01 PM MST	Special Weather Statement	PSR	Yuma	29 min
Sep 18, 7:01 PM MST	Areal Flood Warning	PSR	La Paz, Yuma	114 min
Sep 18, 7:08 PM MST	Areal Flood Warning	PSR	La Paz	107 min
Sep 18, 7:12 PM MST	Areal Flood Warning	PSR	La Paz	103 min
Sep 18, 7:48 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	27 min
Sep 18, 8:04 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	7 min
Sep 18, 8:10 PM MST	Special Weather Statement	PSR	Maricopa	35 min
Sep 18, 8:51 PM MST	Dust Storm Advisory	PSR	Pinal	24 min
Sep 18, 11:57 PM MST	Special Weather Statement	PSR		33 min
Sep 19, 1:22 AM MST	Severe Thunderstorm Warning	PSR	Maricopa	23 min
Sep 19, 2:33 AM MST	Special Weather Statement	PSR	Maricopa	42 min
Sep 19, 3:28 AM MST	Special Weather Statement	PSR		47 min
Sep 19, 3:38 AM MST	Areal Flood Advisory	PSR	Maricopa	35 min
Sep 19, 4:11 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Sep 19, 10:04 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Sep 19, 11:16 AM MST	Special Weather Statement	PSR	Maricopa	29 min
Sep 19, 12:56 PM MST	Special Weather Statement	PSR		34 min
Sep 18, 5:23 PM MST	Special Weather Statement	PSR	Riverside	37 min
Sep 18, 5:27 PM MST	Special Weather Statement	PSR	Imperial	48 min
Sep 18, 5:39 PM MST	Special Weather Statement	PSR	Imperial	36 min
Sep 18, 5:47 PM MST	Severe Thunderstorm Warning	PSR	Imperial	28 min
Sep 18, 5:52 PM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial	3 hr
Sep 18, 5:58 PM MST	Special Weather Statement	PSR	Imperial	32 min
Sep 18, 6:08 PM MST	Severe Thunderstorm Warning	PSR	Imperial	37 min
Sep 18, 6:12 PM MST	Special Weather Statement	PSR	Imperial	3 hr
Sep 18, 6:31 PM MST	Flash Flood Warning Considerable damage threat	PSR	Imperial	2 hr
Sep 18, 6:31 PM MST	Severe Thunderstorm Warning	PSR	Imperial, Riverside	29 min
Sep 18, 6:46 PM MST	Severe Thunderstorm Warning	PSR	Imperial, Riverside	29 min
Sep 18, 6:56 PM MST	Severe Thunderstorm Warning	PSR	Imperial	19 min
Sep 18, 7:11 PM MST	Special Weather Statement	PSR	Riverside	49 min
Sep 18, 7:51 PM MST	Special Weather Statement	PSR	Riverside	39 min
Sep 18, 8:31 PM MST	Special Weather Statement	PSR	Riverside	14 min

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; radar from the NEXRAD Level II archive.