Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 105, NWS Flagstaff, AZ

July 29, 2022Navajo County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 29, 2022, 6:34 PM MDT for Navajo County, Arizona. It was in force for 2 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 29, 2022, 6:34 PM MDT (00:34 UTC)
Expired: Jul 29, 2022, 8:48 PM MDT
In force: 2 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 00:36 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.6 hours before the alert went out and 136 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: 624 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1516 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 28 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 Flagstaff, AZ wrote its last area forecast discussion before this flash flood warning went out at Jul 29, 3:37 PM MDT, 2 hours 57 minutes earlier.

Area forecast discussion, Jul 29, 3:37 PM MDT, 2 hours 57 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>
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</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>
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In the hours before

Local storm report, Jul 29, 2:51 PM MDT, 3 hours 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
151 PM MST FRI JUL 29 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0120 PM     FLASH FLOOD      3 NW LOW MOUNTAIN       35.97N 110.14W
07/29/2022                   NAVAJO             AZ   PUBLIC

            PUBLIC REPORTED 6 FEET OF WATER IN BURNT
            CORN WASH ON NAVAJO NATION.

&&

BAIN

Local storm report, Jul 29, 4:45 PM MDT, 1 hour 49 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>

Local storm report, Jul 29, 4:48 PM MDT, 1 hour 46 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>

Local storm report, Jul 29, 5:21 PM MDT, 1 hour 13 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 Flagstaff, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 6:43 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 29, 7:27 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 29, 8:52 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Jul 29, 11:24 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	7 hr
Jul 30, 10:50 AM MDT	Special Weather Statement	FGZ		25 min
Jul 30, 11:33 AM MDT	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 30, 12:00 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 30, 12:37 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 30, 12:49 PM MDT	Special Weather Statement	FGZ	Yavapai	41 min
Jul 30, 1:04 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 30, 1:17 PM MDT	Special Weather Statement	FGZ	Yavapai	28 min
Jul 30, 1:20 PM MDT	Special Weather Statement	FGZ	Yavapai	25 min
Jul 30, 1:55 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 30, 2:24 PM MDT	Special Weather Statement	FGZ	Navajo	51 min
Jul 30, 3:36 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Jul 30, 3:43 PM MDT	Special Weather Statement	FGZ	Apache	47 min
Jul 30, 4:15 PM MDT	Flash Flood Warning Considerable damage threat	FGZ	Coconino	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.