Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 161, NWS Fort Worth, TX

June 22, 2020Cooke County, Grayson County, Montague County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 22, 2020, 1:28 AM CDT for Cooke County, Grayson County, Montague County, Texas. It was in force for 77 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
Jun 22, 2020, 1:28 AM CDT (06:28 UTC)
Expired
Jun 22, 2020, 2:45 AM CDT
In force
77 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Cooke County, TX, Grayson County, TX, Montague County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 120 km from the middle of the area, began a volume at 06:31 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

Norman, OK (KOUN), launched 00:00Z, 6.5 hours before the alert went out and 176 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2020-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2020-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
42 J/kg
Mixed-layer CIN
-455 J/kg
Mixed-layer LCL
1589 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
117 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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 22, 12:15 AM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, Jun 22, 12:15 AM CDT, 1 hour 13 minutes before
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Hazardous weather outlook, Jun 21, 11:36 PM CDT, 1 hour 52 minutes before
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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 2:14 AM CDTSpecial Weather StatementFWDJack, Wise46 min
Jun 22, 3:00 AM CDTSpecial Weather StatementFWDDenton45 min
Jun 22, 3:32 AM CDTSpecial Weather StatementFWDCollin, Dallas, Hunt, Kaufman, Rockwall, Tarrant43 min
Jun 22, 3:49 AM CDTSpecial Weather StatementFWDLamar41 min
Jun 22, 4:12 AM CDTSpecial Weather StatementFWDDallas, Ellis, Kaufman, Rockwall, Tarrant63 min
Jun 22, 5:23 AM CDTAreal Flood AdvisoryFWDCooke, Montague3 hr
Jun 22, 11:02 AM CDTRiver Flood WarningFWDDenton57 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020

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.