Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 12, NWS Houston/Galveston, TX

April 3, 1999Polk County, San Jacinto County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Apr 3, 1999, 8:36 PM CST for Polk County, San Jacinto County, Texas. It was in force for 3 hr. 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 3, 1999, 8:36 PM CST (02:36 UTC)
Expired: Apr 3, 1999, 11:30 PM CST
In force: 3 hr
Issued by: NWS Houston/Galveston, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Polk County, TX, San Jacinto County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.6 hours before the alert went out and 184 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: 728 J/kg
Mixed-layer CIN: -290 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

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 flash flood 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 flash flood warning went out at Apr 3, 3:25 PM CST, 5 hours 11 minutes earlier.

Area forecast discussion, Apr 3, 3:25 PM CST, 5 hours 11 minutes before

SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
325 PM CST SAT APR 3 1999

RATHER IMPRESSIVE LOOKING CONVECTION STARTING TO FIRE UP OVER PARTS
OF THE FA THIS AFTERNOON.  APPEARS THE EARLIER QUESTIONS RELATED TO
CAP STRENGTH SEEM MOOT.  WILL KEEP RAIN CHANCE ON THE HIGH SIDE FOR
TONIGHT ALONG WITH THE MENTION OF SEVERE.  LOOKING AHEAD...THE COM-
PLICATED FORECASTS CONTINUE WITH GENERAL CONSENSUS OF NON AGREEMENT
AMONG THE MODELS (ESPECIALLY FOR THE EXTENDED FCSTS).  COMPOSITE OF
AVN/NGM PROG TRENDS SEEM MOST REASONABLE FOR THE SHORT TERM AS THEY
KEEP CLOUDS/POPS IN THRU MONDAY.  SUBTROPICAL FLOW EXPECTED TO STAY
ACTIVE WITH EMBEDDED S/W MOVING ACROSS WHILE ANOTHER UPPER LOW DIGS
OFF THE ROCKIES.  DEEP ONSHORE FETCH TO REDEVELOP TOMORROW, BUT THE
BRUNT OF THIS NEXT SYSTEM SHOULD AFFECT SE TX MONDAY AT THE LATEST.
ATTM...INDICATIONS ARE THAT THE AIRMASS WILL HAVE RECOVERED ENOUGH
BY THEN FOR THE POSSIBILITY OF SOME STRONG TSRA.  FOR TONIGHT THIS
LATEST SYSTEM TO EXIT BY MIDNITE WITH SOME PARTIAL CLEARING POSSI-
BLE...BUT THE PREVAILING CONDITIONS SHOULD BE MOSTLY CLOUDY ACROSS
THE BOARD.  NO REAL ARGUMENTS WITH GOING MOS TEMPS AS THEY SEEM TO
FOLLOW PERSISTENCE ANYWAY.  41/45/DEB

PRELIMS...
CLL ET 058/077 065/079 3345
IAH ET 063/078 068/080 6345
GLS ET 068/076 069/077 6445

.HGX...SCA FOR ALL UPPER TX COAST.

In the hours before

Special weather statement, Apr 3, 5:55 PM CST, 2 hours 41 minutes before

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Special weather statement, Apr 3, 5:55 PM CST, 2 hours 41 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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 12:30 AM CST	Flash Flood Warning	HGX	Polk, San Jacinto	3 hr
Apr 4, 3:50 PM CDT	Severe Thunderstorm Warning	HGX	Houston	40 min

Nearby

Flash Flood Warnings in Texas, 1999 Every flash flood 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.