Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 40, NWS Houston/Galveston, TX

May 26, 2018Chambers County, Liberty County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 26, 2018, 5:36 PM CDT for Chambers County, Liberty County, Texas. It was in force for 24 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: May 26, 2018, 5:36 PM CDT (22:36 UTC)
Expired: May 26, 2018, 6:00 PM CDT
In force: 24 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Chambers County, TX, Liberty County, TX

The radar

The Houston radar (KHGX), 60 km from the middle of the area, began a volume at 22:41 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.6 hours before the alert went out and 150 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: 1998 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 36 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 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 May 26, 3:53 PM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, May 26, 3:53 PM CDT, 1 hour 43 minutes before

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In the hours before

Special weather statement, May 26, 4:02 PM CDT, 1 hour 34 minutes before

Special Weather Statement
National Weather Service Houston/Galveston TX
402 PM CDT SAT MAY 26 2018

TXZ214-262145-
Chambers TX-
402 PM CDT SAT MAY 26 2018

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CHAMBERS COUNTY UNTIL 445
PM CDT...

At 401 PM CDT, Doppler radar was tracking a strong thunderstorm over
Stowell, or near Hamshire, moving west at 10 mph.

Winds in excess of 40 mph and small hail will be possible with this
storm.

Locations impacted include...
Winnie and Stowell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2957 9454 2958 9455 2957 9457 2987 9462
      2989 9443 2989 9442 2985 9436 2967 9436
TIME...MOT...LOC 2101Z 086DEG 8KT 2980 9438

Special weather statement, May 26, 5:30 PM CDT, 6 minutes before

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    <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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The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 4:02 PM CDT	Special Weather Statement	HGX	Chambers	43 min
May 26, 5:30 PM CDT	Special Weather Statement	HGX	Chambers	30 min
May 26, 6:00 PM CDT	Special Weather Statement	HGX	Harris	45 min
May 26, 6:38 PM CDT	Special Weather Statement	HGX	Brazoria	37 min
May 26, 6:53 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend	37 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

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.