Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 70, NWS Houston/Galveston, TX

April 27, 1997Trinity County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 27, 1997, 2:00 AM CDT for Trinity County, Texas. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 27, 1997, 2:00 AM CDT (07:00 UTC)
Expired
Apr 27, 1997, 2:45 AM CDT
In force
45 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Trinity County, TX

The radar

The Houston radar (KHGX), 180 km from the middle of the area, began a volume at 07:02 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.

What was reported inside it

TimeReportWhereRemark
Apr 27, 2:30 AM CDTThunderstorm WindTrinity, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 27, 12:15 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 7.0 hours before the alert went out and 203 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, Shreveport, LA at 00:00Z on 1997-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Shreveport, LA at 00:00Z on 1997-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 274 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
478 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
274 m²/s²
0-3 km storm-relative helicity
311 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 26, 7:53 PM CDT, 6 hours 7 minutes earlier.

Area forecast discussion, Apr 26, 7:53 PM CDT, 6 hours 7 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>

In the hours before

Special weather statement, Apr 27, 12:15 AM CDT, 1 hour 45 minutes before
TXZ211-237-210-227-198-213-163-200-511-236-199-179-178-164-177-
212-197-226-196-195-214-238-235-176-271115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1217 AM CDT SUN APR 27 1997

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR
ALL OF SOUTHEAST TEXAS UNTIL 600 AM THIS SUNDAY MORNING. THIS WATCH
INCLUDES AUSTIN...BRAZORIA...BRAZOSCHAMBERS...COLOTADO...FORT BEND...
GALVESTON...GRIMES...HARRIS...HOUSTON...MONTGOMERY...POLK...SAN JACINTO.
TRINITY...WALKER...WALLER...WASTHIGTON...WHARTON...JACKSON...
MATAGORDA COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN
AND NEAR THE WATCH AREA.
Special weather statement, Apr 27, 12:17 AM CDT, 1 hour 43 minutes before
TXZ211-237-210-227-198-213-163-200-511-236-199-179-178-164-177-
212-197-226-196-195-214-238-235-176-271115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1217 AM CDT SUN APR 27 1997

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR
ALL OF SOUTHEAST TEXAS UNTIL 600 AM THIS SUNDAY MORNING. THIS WATCH
INCLUDES AUSTIN...BRAZORIA...BRAZOSCHAMBERS...COLOTADO...FORT BEND...
GALVESTON...GRIMES...HARRIS...HOUSTON...MONTGOMERY...POLK...SAN JACINTO.
TRINITY...WALKER...WALLER...WASTHIGTON...WHARTON...JACKSON...
MATAGORDA COUNTIES.

A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN
AND NEAR THE WATCH AREA.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 11:03 PM CDTSevere Thunderstorm WarningHGXAustin, Colorado57 min
Apr 26, 11:31 PM CDTSevere Thunderstorm WarningHGXWashington59 min
Apr 26, 11:52 PM CDTSevere Thunderstorm WarningHGXWaller38 min
Apr 27, 12:02 AM CDTSevere Thunderstorm WarningHGXGrimes, Montgomery58 min
Apr 27, 12:45 AM CDTSevere Thunderstorm WarningHGXWalker60 min
Apr 27, 1:03 AM CDTSevere Thunderstorm WarningHGXSan Jacinto57 min
Apr 27, 1:20 AM CDTSevere Thunderstorm WarningHGXPolk55 min
Apr 27, 3:50 AM CDTSevere Thunderstorm WarningHGXBrazoria25 min
Apr 27, 4:09 AM CDTSevere Thunderstorm WarningHGXGalveston66 min
Apr 27, 4:21 AM CDTSevere Thunderstorm WarningHGXHarris54 min
Apr 27, 5:06 AM CDTSevere Thunderstorm WarningHGXLiberty69 min
Apr 27, 5:37 AM CDTSevere Thunderstorm WarningHGXBrazoria53 min
Apr 27, 8:16 AM CDTSevere Thunderstorm WarningHGXBrazoria64 min
Apr 27, 8:49 AM CDTSevere Thunderstorm WarningHGXHarris56 min
Apr 27, 9:17 AM CDTSevere Thunderstorm WarningHGXHarris, Liberty58 min

Nearby

Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.