Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 68, NWS Austin/San Antonio, TX

April 26, 1999Medina County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 26, 1999, 5:49 AM CDT for Medina County, Texas. It was in force for 61 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 26, 1999, 5:49 AM CDT (10:49 UTC)
Expired: Apr 26, 1999, 6:50 AM CDT
In force: 61 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Medina County, TX

The radar

The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 10:52 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

Del Rio, TX (KDRT), launched 00:00Z, 10.8 hours before the alert went out and 168 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: 2678 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 694 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 11.1

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 25, 11:50 PM CDT, 5 hours 59 minutes before

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Special weather statement, Apr 25, 11:50 PM CDT, 5 hours 59 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Special weather statement, Apr 26, 5:47 AM CDT, 2 minutes before

TXZ171>173-183>194-202>209-217>225-228-262201-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
547 AM CDT MON APR 26 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING.  A LINE
OF STRONG TO SEVERE THUNDERSTORMS HAS DEVELOPED ALONG AND JUST AHEAD
OF A COLD FRONTAL BOUNDARY.  THE STORMS ARE CAPABLE OF PRODUCING
LARGE HAIL...WIND GUSTS IN EXCESS OF 50 MPH AND DEADLY LIGHTNING.
THE STORMS ARE MOVING ACROSS THE HILL COUNTRY TO THE EAST AT 40 MPH.
AT THIS SPEED THE STORMS WILL EXIT THE HILL COUNTRY AND AFFECT
THE INTERSTATE 35 CORRIDOR AROUND RUSH HOUR...THEN MOVE
ACROSS NORTHERN SECTIONS OF SOUTH CENTRAL TEXAS BEFORE NOON.

RAINFALL AMOUNTS FROM THE STORMS WILL AVERAGE 1/2 TO 1 INCH
WITH HIGHER TOTALS OF 3 INCHES POSSIBLE MAINLY EAST OF THE
INTERSTATE 35 CORRIDOR.

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED
HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP.

FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL
TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS
OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...HOUSTON/GALVESTON
AND CORPUS CHRISTI.

Special weather statement, Apr 26, 5:47 AM CDT, 2 minutes before

TXZ171>173-183>194-202>209-217>225-228-262201-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
547 AM CDT MON APR 26 1999

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING.  A LINE
OF STRONG TO SEVERE THUNDERSTORMS HAS DEVELOPED ALONG AND JUST AHEAD
OF A COLD FRONTAL BOUNDARY.  THE STORMS ARE CAPABLE OF PRODUCING
LARGE HAIL...WIND GUSTS IN EXCESS OF 50 MPH AND DEADLY LIGHTNING.
THE STORMS ARE MOVING ACROSS THE HILL COUNTRY TO THE EAST AT 40 MPH.
AT THIS SPEED THE STORMS WILL EXIT THE HILL COUNTRY AND AFFECT
THE INTERSTATE 35 CORRIDOR AROUND RUSH HOUR...THEN MOVE
ACROSS NORTHERN SECTIONS OF SOUTH CENTRAL TEXAS BEFORE NOON.

RAINFALL AMOUNTS FROM THE STORMS WILL AVERAGE 1/2 TO 1 INCH
WITH HIGHER TOTALS OF 3 INCHES POSSIBLE MAINLY EAST OF THE
INTERSTATE 35 CORRIDOR.

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED
HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP.

FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL
TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS
OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...HOUSTON/GALVESTON
AND CORPUS CHRISTI.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 12:39 AM CDT	Severe Thunderstorm Warning	EWX	Maverick	51 min
Apr 26, 6:07 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar	63 min
Apr 26, 7:56 AM CDT	Severe Thunderstorm Warning	EWX	Bandera	34 min
Apr 26, 10:54 AM CDT	Severe Thunderstorm Warning	EWX	Karnes	56 min

Nearby

Severe Thunderstorm Warnings in Texas, 1999 Every severe thunderstorm warning in 1999

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.