Alert archive / Arizona / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 28, NWS Flagstaff, AZ

August 1, 2022Gila County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 1, 2022, 4:15 PM MST for Gila County, Arizona. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 1, 2022, 4:15 PM MST (23:15 UTC)
Expired: Aug 1, 2022, 5:00 PM MST
In force: 45 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Gila County, AZ

The radar

The Flagstaff radar (KFSX), 93 km from the middle of the area, began a volume at 23:16 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

Tuscon, AZ (KTUS), launched 12:00Z, 11.3 hours before the alert went out and 181 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: 223 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 1251 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 59 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 severe thunderstorm 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 severe thunderstorm warning went out at Aug 1, 3:20 PM MST, 55 minutes earlier.

Area forecast discussion, Aug 1, 3:20 PM MST, 55 minutes before

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In the hours before

Local storm report, Aug 1, 12:53 PM MST, 3 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1253 PM MST MON AUG 1 2022

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

0629 PM     FLASH FLOOD      12 NNW ASH FORK         35.39N 112.54W
07/31/2022                   COCONINO           AZ   PUBLIC

            LOCATION IS APPROXIMATE. FS 142 WASHED OUT
            DUE TO FLASH FLOODING. RECEIVED VIA PRIVATE
            MESSAGE.

&&

MMG

Local storm report, Aug 1, 3:21 PM MST, 54 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 31, 5:29 PM MST	Special Weather Statement	FGZ		31 min
Jul 31, 5:35 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Jul 31, 6:05 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 31, 6:21 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Jul 31, 8:20 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Navajo	2 hr
Jul 31, 8:41 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Navajo	2 hr
Jul 31, 11:58 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Apache, Navajo	3 hr
Aug 1, 1:52 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Aug 1, 4:37 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr

Nearby

Severe Thunderstorm Warnings in Arizona, 2022 Every severe thunderstorm 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.