Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 31, NWS Phoenix, AZ

July 26, 2022Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 26, 2022, 2:08 AM MST for Maricopa 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: Jul 26, 2022, 2:08 AM MST (09:08 UTC)
Expired: Jul 26, 2022, 5:38 AM MST
In force: 4 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
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 09:09 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, 9.1 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: 877 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1921 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 16 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 Jul 26, 12:24 AM MST, 1 hour 44 minutes earlier.

Area forecast discussion, Jul 26, 12:24 AM MST, 1 hour 44 minutes before

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In the hours before

Special weather statement, Jul 25, 8:35 PM MST, 5 hours 33 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
Jul 25, 5:34 PM MST	Special Weather Statement	PSR		41 min
Jul 25, 5:48 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 25, 5:56 PM MST	Special Weather Statement	PSR		34 min
Jul 25, 6:27 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 25, 6:57 PM MST	Special Weather Statement	PSR		33 min
Jul 25, 7:10 PM MST	Areal Flood Advisory	PSR	La Paz	13 min
Jul 25, 7:13 PM MST	Special Weather Statement	PSR		47 min
Jul 25, 7:23 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Jul 25, 7:41 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 25, 7:52 PM MST	Special Weather Statement	PSR		38 min
Jul 25, 8:00 PM MST	Dust Storm Advisory	PSR	Pinal	60 min
Jul 25, 8:20 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 25, 8:35 PM MST	Special Weather Statement	PSR		25 min
Jul 25, 8:51 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 25, 9:44 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 25, 10:20 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 25, 11:01 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 25, 11:30 PM MST	Areal Flood Advisory	PSR	Maricopa	4 hr
Jul 25, 11:42 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 25, 11:46 PM MST	Areal Flood Advisory	PSR	Maricopa	4 hr
Jul 26, 12:17 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 26, 12:28 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 26, 12:50 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	5 hr
Jul 26, 6:17 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 26, 12:41 PM MST	Dust Storm Advisory	PSR	Pinal	49 min
Jul 26, 3:26 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	3 hr
Jul 25, 5:40 PM MST	Areal Flood Advisory	PSR	Riverside, San Bernardino	3 hr
Jul 25, 6:32 PM MST	Areal Flood Advisory	PSR	Riverside	3 hr
Jul 25, 7:32 PM MST	Areal Flood Advisory	PSR	Imperial	3 hr

Nearby

Flash Flood Warnings in Arizona, 2022 Every flash flood warning in 2022

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.