Alert archive / Texas / Flash Flood Warnings in 2023

Flash Flood Warning 17, NWS Houston/Galveston, TX

November 30, 2023Chambers County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Nov 30, 2023, 7:13 PM CST for Chambers County, Texas. It was in force for 2 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: Nov 30, 2023, 7:13 PM CST (01:13 UTC)
Expired: Nov 30, 2023, 9:15 PM CST
In force: 2 hr
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Flood severity: None

County Chambers County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.2 hours before the alert went out and 149 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Nov 30, 5:33 PM CST, 1 hour 40 minutes earlier.

Area forecast discussion, Nov 30, 5:33 PM CST, 1 hour 40 minutes before

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In the hours before

Local storm report, Nov 30, 2:02 PM CST, 5 hours 11 minutes before

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Special weather statement, Nov 30, 4:25 PM CST, 2 hours 48 minutes before

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Special weather statement, Nov 30, 5:07 PM CST, 2 hours 6 minutes before

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<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.
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        Please try again in a few minutes.
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        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
Nov 30, 6:17 PM CST	Areal Flood Advisory	HGX	Chambers	58 min
Nov 30, 6:48 PM CST	Special Marine Warning	HGX		42 min
Nov 30, 7:41 PM CST	Special Marine Warning	HGX		34 min
Dec 1, 2:02 AM CST	Dense Fog Advisory	HGX	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 12 more	8 hr
Dec 1, 3:07 PM CST	Special Weather Statement	HGX	Matagorda	23 min
Dec 1, 3:27 PM CST	Special Weather Statement	HGX	Brazoria	33 min
Dec 1, 3:41 PM CST	Marine Dense Fog Advisory	HGX		20 hr
Dec 1, 3:50 PM CST	Special Marine Warning	HGX		25 min
Dec 1, 3:55 PM CST	Special Marine Warning	HGX		35 min
Dec 1, 4:01 PM CST	Special Marine Warning	HGX		59 min
Dec 1, 4:16 PM CST	Special Marine Warning	HGX		44 min
Dec 1, 4:58 PM CST	Special Marine Warning	HGX		62 min
Dec 1, 5:28 PM CST	Special Weather Statement	HGX	Brazoria, Matagorda	62 min

Nearby

Flash Flood Warnings in Texas, 2023 Every flash flood warning in 2023

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.