Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 79, NWS Fort Worth, TX

April 13, 2018Tarrant County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 13, 2018, 4:39 PM CDT for Tarrant County, Texas. It was in force for 18 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
Apr 13, 2018, 4:39 PM CDT (21:39 UTC)
Expired
Apr 13, 2018, 4:57 PM CDT
In force
18 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

County Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 22 km from the middle of the area, began a volume at 21:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 13, 1:20 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.7 hours before the alert went out and 7 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, Fort Worth, TX at 12:00Z on 2018-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 731 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, Fort Worth, TX at 12:00Z on 2018-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 square meters per square second.19395878Sfc1 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
731 J/kg
Mixed-layer CIN
-418 J/kg
Mixed-layer LCL
788 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
250 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 Apr 13, 3:30 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Apr 13, 3:30 PM CDT, 1 hour 9 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>
Hazardous weather outlook, Apr 13, 2:41 PM CDT, 1 hour 58 minutes before
Hazardous Weather Outlook
National Weather Service Fort Worth TX
241 PM CDT Fri Apr 13 2018

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-141200-
Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin-
Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas-
Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell-
Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro-
Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone-
Leon-Milam-Robertson-
241 PM CDT Fri Apr 13 2018

This Hazardous Weather Outlook is for North and Central Texas.

.DAY ONE...This Afternoon and Tonight.

Scattered thunderstorms will continue this afternoon and evening
along and east of a dryline. This feature will be generally around
I-35 and areas east through this evening. Some storms will be severe
with very large hail and damaging winds. There will also be a threat
for a tornado or two through the evening.

Gusty west winds behind the dryline will continue through this
evening. There will be a threat for rapidly spreading grass fires
west of the dryline. A Red Flag Warning is in effect through late
evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There will be an elevated threat of grass fires west of I-35 on
Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon and evening.

Dunn

In the hours before

Local storm report, Apr 13, 4:17 PM CDT, 22 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, Apr 13, 4:21 PM CDT, 18 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, Apr 13, 4:26 PM CDT, 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>
Local storm report, Apr 13, 4:28 PM CDT, 11 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, Apr 13, 4:30 PM CDT, 9 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, Apr 13, 4:33 PM CDT, 6 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 Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 13, 3:22 AM CDTWind AdvisoryFWDComanche, Eastland, Erath, Hamilton, Hood, Jack and 8 more15 hr
Apr 13, 4:15 AM CDTRed Flag WarningFWDComanche, Eastland, Erath, Jack, Mills, Montague and 3 more18 hr
Apr 13, 1:01 PM CDTSpecial Weather StatementFWDHunt29 min
Apr 13, 2:04 PM CDTSevere Thunderstorm WarningFWDCooke, Montague56 min
Apr 13, 2:55 PM CDTSevere Thunderstorm WarningFWDCooke, Grayson53 min
Apr 13, 3:04 PM CDTSevere Thunderstorm WarningFWDCooke, Denton, Grayson56 min
Apr 13, 3:32 PM CDTSevere Thunderstorm WarningFWDDenton, Tarrant, Wise58 min
Apr 13, 3:56 PM CDTSevere Thunderstorm WarningFWDCooke, Grayson64 min
Apr 13, 4:06 PM CDTSevere Thunderstorm WarningFWDParker, Tarrant54 min
Apr 13, 4:14 PM CDTSevere Thunderstorm WarningFWDJohnson61 min
Apr 13, 4:22 PM CDTSevere Thunderstorm WarningFWDCollin, Denton, Grayson38 min
Apr 13, 4:28 PM CDTSevere Thunderstorm WarningFWDDenton62 min
Apr 13, 4:54 PM CDTSpecial Weather StatementFWDSomervell36 min
Apr 13, 4:54 PM CDTSevere Thunderstorm WarningFWDCollin, Denton, Fannin, Grayson66 min
Apr 13, 5:01 PM CDTSevere Thunderstorm WarningFWDBosque, Johnson, Somervell59 min
Apr 13, 5:09 PM CDTSpecial Weather StatementFWDTarrant36 min
Apr 13, 5:18 PM CDTSevere Thunderstorm WarningFWDCollin, Denton42 min
Apr 13, 5:22 PM CDTSpecial Weather StatementFWDTarrant38 min
Apr 13, 5:25 PM CDTSpecial Weather StatementFWDHamilton, Mills35 min
Apr 13, 5:32 PM CDTSpecial Weather StatementFWDHill28 min
Apr 13, 5:46 PM CDTSevere Thunderstorm WarningFWDBosque, Coryell, Hamilton, Lampasas, Mills59 min
Apr 13, 5:54 PM CDTSevere Thunderstorm WarningFWDCollin, Fannin, Hunt, Lamar66 min
Apr 13, 6:00 PM CDTSpecial Weather StatementFWDJohnson30 min
Apr 13, 6:30 PM CDTSevere Thunderstorm WarningFWDBosque, Coryell, Hamilton, McLennan60 min
Apr 13, 6:46 PM CDTSpecial Weather StatementFWDLampasas29 min
Apr 13, 6:49 PM CDTAreal Flood AdvisoryFWDCollin116 min
Apr 13, 6:53 PM CDTSevere Thunderstorm WarningFWDCollin, Fannin, Hunt67 min
Apr 13, 6:55 PM CDTSpecial Weather StatementFWDJohnson35 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018Every severe thunderstorm warning in 2018

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.