Alert archive / Texas / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 31, NWS Austin/San Antonio, TX

April 13, 1991Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 13, 1991, 8:35 AM CDT for Llano County, Texas. It was in force for 40 min.

The area

The counties it named.

The facts

Issued: Apr 13, 1991, 8:35 AM CDT (13:35 UTC)
Expired: Apr 13, 1991, 9:15 AM CDT
In force: 40 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Llano County, TX

The nearest sounding before it

Stephenville/Cla, TX (KSEP), launched 12:00Z, 1.6 hours before the alert went out and 177 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: 805 J/kg
Mixed-layer CIN: -308 J/kg
Mixed-layer LCL: 1877 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Apr 13, 6:45 AM CDT, 1 hour 50 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>

Special weather statement, Apr 13, 6:51 AM CDT, 1 hour 44 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>

Special weather statement, Apr 13, 7:59 AM CDT, 36 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>

Special weather statement, Apr 13, 8:04 AM CDT, 31 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>

Special weather statement, Apr 13, 8:23 AM CDT, 12 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>

Special weather statement, Apr 13, 8:25 AM CDT, 10 minutes before

TXZ030-034-036-131500-

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE AUSTIN TX
820 AM CDT SAT APR 13 1991

...A SEVERE THUNDERSTORMS WATCH FOR LLANO...MILLS AND SAN SABA
    COUNTIES TILL 10 AM...

...FLASH FLOOD WATCH FOR LAMPASAS COUNTY TODAY...

AT 810 AM CDT RADAR INDICATED A LINE OF THUNDERSTORMS SOME POSSIBLY
SEVERE FROM GOLDWAITHE TO SAN SABA...MASON AND JUNCTION.  THE POSSIBLE
SEVERE STORM WAS JUST EAST OF MASON.

MOVEMENT OF THE PRECIPITATION WAS TO THE EAST AT 40 MPH.

THIS POSSIBLE SEVERE STORM COULD MOVE INTO SOUTHERN SAN SABA AND LLANO
COUNTIES IN THE NEXT HALF HOUR.  PERSONS SHOULD BE PREPARED TO TAKE ACTION
AT A MOMENTS NOTICE.
CAMPERS NEAR CREEKS tAND STREAMS SHOULD ALSO BE AWARE OF RAPIDLY RISING
WATER.

STAY INFORMED OF THE LATEST WEATHER DEVELOPMENTS FOR FURTHER STATEMENTS
AND POSSIBLE WARINGS.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 11:22 AM CDT	Tornado Warning	EWX	Williamson	53 min
Apr 13, 12:48 PM CDT	Flash Flood Warning	EWX	Williamson	3 hr
Apr 13, 3:11 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	64 min
Apr 13, 3:38 PM CDT	Tornado Warning	EWX	Travis, Williamson	52 min
Apr 13, 4:30 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	35 min
Apr 13, 4:55 PM CDT	Severe Thunderstorm Warning	EWX	Burleson	50 min
Apr 13, 5:59 PM CDT	Severe Thunderstorm Warning	EWX	Burleson, Lee	61 min
Apr 13, 6:27 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop	48 min
Apr 13, 6:58 PM CDT	Severe Thunderstorm Warning	EWX	Burleson	32 min

Nearby

Severe Thunderstorm Warnings in Texas, 1991 Every severe thunderstorm warning in 1991

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.