Alert archive / Arizona / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 49, NWS Flagstaff, AZ

July 15, 2024Coconino County, Arizona

NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 15, 2024, 2:25 PM MST for Coconino County, Arizona. It was in force for 20 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: Jul 15, 2024, 2:25 PM MST (21:25 UTC)
Expired: Jul 15, 2024, 2:45 PM MST
In force: 20 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Coconino County, AZ

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 21:25 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

Las Vegas, NV (KVEF), launched 12:00Z, 9.4 hours before the alert went out and 344 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: 6 J/kg
Mixed-layer CIN: -249 J/kg
Mixed-layer LCL: 3213 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 23 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 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 Jul 15, 12:31 PM MST, 1 hour 54 minutes earlier.

Area forecast discussion, Jul 15, 12:31 PM MST, 1 hour 54 minutes before

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In the hours before

Special weather statement, Jul 15, 12:42 PM MST, 1 hour 43 minutes before

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Special weather statement, Jul 15, 1:12 PM MST, 1 hour 13 minutes before

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<html lang="en">
<head>
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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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Special weather statement, Jul 15, 1:58 PM MST, 27 minutes before

<!doctype html>
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<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>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 5:08 PM MST	Special Weather Statement	FGZ		37 min
Jul 14, 5:13 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	11 min
Jul 14, 5:20 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	25 min
Jul 14, 5:27 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Jul 14, 5:38 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	28 min
Jul 14, 6:17 PM MST	Special Weather Statement	FGZ	Yavapai	28 min
Jul 14, 6:39 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	36 min
Jul 14, 7:08 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jul 14, 7:31 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	44 min
Jul 14, 8:08 PM MST	Special Weather Statement	FGZ		37 min
Jul 14, 8:24 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	2 hr
Jul 14, 8:47 PM MST	Special Weather Statement	FGZ		28 min
Jul 14, 9:51 PM MST	Special Weather Statement	FGZ	Yavapai	24 min
Jul 15, 12:42 PM MST	Special Weather Statement	FGZ	Yavapai	33 min
Jul 15, 1:12 PM MST	Special Weather Statement	FGZ	Yavapai	33 min
Jul 15, 1:58 PM MST	Special Weather Statement	FGZ		32 min
Jul 15, 2:12 PM MST	Areal Flood Advisory	FGZ	Coconino	115 min
Jul 15, 2:52 PM MST	Special Weather Statement	FGZ	Yavapai	23 min
Jul 15, 3:11 PM MST	Special Weather Statement	FGZ	Yavapai	49 min
Jul 15, 3:22 PM MST	Areal Flood Advisory	FGZ	Yavapai	71 min

Nearby

Severe Thunderstorm Warnings in Arizona, 2024 Every severe thunderstorm warning in 2024

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.