Alert archive / Texas / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 159, NWS Austin/San Antonio, TX

October 29, 1991McMullen County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Oct 29, 1991, 3:31 PM CST for McMullen County, Texas. It was in force for 59 min.

The area

The counties it named.

The facts

Issued: Oct 29, 1991, 3:31 PM CST (21:31 UTC)
Expired: Oct 29, 1991, 4:30 PM CST
In force: 59 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County McMullen County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 9.5 hours before the alert went out and 248 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: 1990 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 790 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.8

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, Oct 29, 9:50 AM CST, 5 hours 41 minutes before

TXZ030-034>037-291645-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
945 AM CST TUE OCT 29 1991

...COLD FRONTAL THUNDERSTORMS NOW 25 MILES NORTHWEST OF AUSTIN...

AT 940 AM...RADAR SHOWED PRE-FRONTAL THUNDERSTORMS ALONG A LINE FROM
CAMERON...GEORGETOWN...LAKE TRAVIS...JOHNSON CITY AND BLANCO LINE.
THE LINE OF SHOWERS AND THUNDERSTORMS WAS MOVING TO THE SOUTHEAST AT
25 MPH.  IT SHOULD REACH THE CAPITAL CITY AROUND 11 AM.

RAINFALL RATES...NEAR ONE INCH PER HOUR...WERE LOCATED IN SMALL SPOTS
AROUND HARPER...ROUND MOUNTAIN...LIBERTY HILL AND JARRELL.

PERSONS IN SOUTH CENTRAL TEXAS SHOULD BE PREPARED FOR A MAJOR WEATHER
CHANGE AS THESE THUNDERSTORMS PUSH THROUGH AND MUCH COLDER AIR FILLS IN
BEHIND THEM.  SOME OF THESE STORMS COULD PRODUCE LARGE HAIL...DAMAGING
WINDS AND NEARLY CONTINUOUS LIGHTNING STRIKES.  DUE TO PREVIOUS RAINS
SOME SPOTS MAY EXPERIENCE BRIEF LOCALIZED RAINS AND FLASH FLOODING. JVD

Special weather statement, Oct 29, 10:02 AM CST, 5 hours 29 minutes before

TXZ030-034>037-291645-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
945 AM CST TUE OCT 29 1991

...COLD FRONTAL THUNDERSTORMS NOW 25 MILES NORTHWEST OF AUSTIN...

AT 940 AM...RADAR SHOWED PRE-FRONTAL THUNDERSTORMS ALONG A LINE FROM
CAMERON...GEORGETOWN...LAKE TRAVIS...JOHNSON CITY AND BLANCO LINE.
THE LINE OF SHOWERS AND THUNDERSTORMS WAS MOVING TO THE SOUTHEAST AT
25 MPH.  IT SHOULD REACH THE CAPITAL CITY AROUND 11 AM.

RAINFALL RATES...NEAR ONE INCH PER HOUR...WERE LOCATED IN SMALL SPOTS
AROUND HARPER...ROUND MOUNTAIN...LIBERTY HILL AND JARRELL.

PERSONS IN SOUTH CENTRAL TEXAS SHOULD BE PREPARED FOR A MAJOR WEATHER
CHANGE AS THESE THUNDERSTORMS PUSH THROUGH AND MUCH COLDER AIR FILLS IN
BEHIND THEM.  SOME OF THESE STORMS COULD PRODUCE HAIL...DAMAGING WINDS
AND NEARLY CONTINUOUS LIGHTNING STRIKES.  DUE TO PREVIOUS RAINS SOME
SPOTS MAY EXPERIENCE BRIEF LOCALIZED HEAVY RAINS AND FLASH FLOODING. JVD

Special weather statement, Oct 29, 2:10 PM CST, 1 hour 21 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, Oct 29, 2:58 PM CST, 33 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, Oct 29, 3:26 PM CST, 5 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 Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 29, 10:13 AM CST	Flash Flood Warning	EWX	Real	3 hr
Oct 29, 11:13 AM CST	Flash Flood Warning	EWX	Kerr	3 hr
Oct 29, 1:52 PM CST	Severe Thunderstorm Warning	EWX	Frio	53 min
Oct 29, 2:05 PM CST	Severe Thunderstorm Warning	EWX	Medina	40 min
Oct 29, 2:13 PM CST	Severe Thunderstorm Warning	EWX	Bexar	62 min
Oct 29, 2:27 PM CST	Severe Thunderstorm Warning	EWX	Atascosa	63 min
Oct 29, 2:42 PM CST	Severe Thunderstorm Warning	EWX	Frio	33 min
Oct 29, 3:03 PM CST	Tornado Warning	EWX	Atascosa	42 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.