Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 63, NWS Houston/Galveston, TX

May 14, 2008Liberty County, Polk County, San Jacinto County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 14, 2008, 11:20 AM CDT for Liberty County, Polk County, San Jacinto County, Texas. It was in force for 40 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 14, 2008, 11:20 AM CDT (16:20 UTC)
Expired: May 14, 2008, 12:00 PM CDT
In force: 40 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

Counties Liberty County, TX, Polk County, TX, San Jacinto County, TX

The radar

The Houston radar (KHGX), 116 km from the middle of the area, began a volume at 16:20 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 14, 7:50 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.3 hours before the alert went out and 172 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: 1534 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 316 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.5

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 14, 10:58 AM CDT, 22 minutes earlier.

Area forecast discussion, May 14, 10:58 AM CDT, 22 minutes before

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Hazardous weather outlook, May 14, 11:16 AM CDT, 4 minutes before

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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 14, 7:08 AM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Grimes, Madison	52 min
May 14, 7:58 AM CDT	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Grimes	47 min
May 14, 8:38 AM CDT	Severe Thunderstorm Warning	HGX	Grimes, Montgomery, Walker	52 min
May 14, 9:42 AM CDT	Tornado Warning	HGX	Washington	36 min
May 14, 10:03 AM CDT	Severe Thunderstorm Warning	HGX	Montgomery, Polk, San Jacinto, Walker	57 min
May 14, 10:13 AM CDT	Tornado Warning	HGX	Montgomery, Polk, San Jacinto, Walker	47 min
May 14, 10:29 AM CDT	Areal Flood Advisory	HGX	Washington	2 hr
May 14, 10:38 AM CDT	Tornado Warning	HGX	Montgomery, San Jacinto	52 min
May 14, 10:50 AM CDT	Tornado Warning	HGX	Polk, San Jacinto	55 min
May 14, 11:45 AM CDT	Severe Thunderstorm Warning	HGX	Polk	45 min
May 14, 12:03 PM CDT	Tornado Warning	HGX	Polk	27 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.