Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 25, NWS Phoenix, AZ

July 24, 2022Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 24, 2022, 8:34 AM 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: Jul 24, 2022, 8:34 AM MST (15:34 UTC)
Expired: Jul 24, 2022, 11:30 AM 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 15:37 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, 3.6 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: 437 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 1851 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 24, 5:01 AM MST, 3 hours 33 minutes earlier.

Area forecast discussion, Jul 24, 5:01 AM MST, 3 hours 33 minutes before

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In the hours before

Local storm report, Jul 24, 7:14 AM MST, 1 hour 20 minutes before

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Local storm report, Jul 24, 7:32 AM MST, 1 hour 2 minutes before

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Local storm report, Jul 24, 7:35 AM MST, 59 minutes before

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Local storm report, Jul 24, 7:36 AM MST, 58 minutes before

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<body>
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
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Local storm report, Jul 24, 7:37 AM MST, 57 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <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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Local storm report, Jul 24, 7:42 AM MST, 52 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.
      </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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</body>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 4:14 AM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	2 hr
Jul 24, 5:13 AM MST	Special Weather Statement	PSR	Pinal	47 min
Jul 24, 5:51 AM MST	Special Weather Statement	PSR	Pinal	39 min
Jul 24, 6:03 AM MST	Dust Storm Warning	PSR	Maricopa, Pinal	57 min
Jul 24, 6:09 AM MST	Areal Flood Advisory	PSR	Pinal	3 hr
Jul 24, 6:43 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Jul 24, 8:28 AM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	2 hr
Jul 24, 4:47 PM MST	Special Weather Statement	PSR		43 min

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.