Alert archive / Texas / Flash Flood Warnings in 1989

Flash Flood Warning 2, NWS Houston/Galveston, TX

May 17, 1989Harris County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at May 17, 1989, 11:27 PM CDT for Harris County, Texas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 17, 1989, 11:27 PM CDT (04:27 UTC)
Expired
May 18, 1989, 1:30 AM CDT
In force
2 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Harris County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.5 hours before the alert went out and 213 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, Lake Charles Mun, LA at 00:00Z on 1989-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1462 joules per kilogram.LCLLFCEL10008507005003002001001 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, Lake Charles Mun, LA at 00:00Z on 1989-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 square meters per square second.19395878Sfc1 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
1462 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
740 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
2.3
Supercell composite
15.1

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 flash flood 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, May 17, 5:43 PM CDT, 5 hours 44 minutes before
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Special weather statement, May 17, 6:43 PM CDT, 4 hours 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>

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 7:00 PM CDTSevere Thunderstorm WarningHGXPolk60 min
May 17, 7:16 PM CDTTornado WarningHGXGrimes, Waller59 min
May 17, 7:19 PM CDTSevere Thunderstorm WarningHGXColorado56 min
May 17, 7:33 PM CDTSevere Thunderstorm WarningHGXMontgomery42 min
May 17, 7:45 PM CDTSevere Thunderstorm WarningHGXWharton60 min
May 17, 8:01 PM CDTSevere Thunderstorm WarningHGXHarris29 min
May 17, 8:10 PM CDTFlash Flood WarningHGXMontgomery, Polk, San Jacinto, Trinity, Walker4 hr
May 17, 8:11 PM CDTSevere Thunderstorm WarningHGXMontgomery64 min
May 17, 8:27 PM CDTSevere Thunderstorm WarningHGXFort Bend48 min
May 17, 8:48 PM CDTSevere Thunderstorm WarningHGXHarris57 min
May 17, 9:38 PM CDTSevere Thunderstorm WarningHGXLiberty67 min
May 18, 1:12 AM CDTSevere Thunderstorm WarningHGXHarris48 min
May 18, 1:35 AM CDTFlash Flood WarningHGXHarris3 hr
May 18, 1:47 AM CDTFlash Flood WarningHGXLiberty4 hr
May 18, 5:57 AM CDTFlash Flood WarningHGXLiberty2 hr
May 18, 7:25 AM CDTFlash Flood WarningHGXHarris3 hr
May 18, 7:43 AM CDTFlash Flood WarningHGXMontgomery3 hr
May 18, 7:52 AM CDTFlash Flood WarningHGXLiberty3 hr
May 18, 8:05 AM CDTSevere Thunderstorm WarningHGXMontgomery55 min
May 18, 10:04 AM CDTFlash Flood WarningHGXHarris, Liberty, Montgomery4 hr
May 18, 10:13 AM CDTTornado WarningHGXHarris32 min
May 18, 12:39 PM CDTFlash Flood WarningHGXFort Bend2 hr
May 18, 1:58 PM CDTFlash Flood WarningHGXHarris, Liberty, Montgomery3 hr
May 18, 1:58 PM CDTFlash Flood WarningHGXFort Bend3 hr
May 18, 2:15 PM CDTSevere Thunderstorm WarningHGXHarris45 min

Nearby

Flash Flood Warnings in Texas, 1989Every flash flood warning in 1989

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.