Alert archive / Texas / Tornado Warnings in 2010

Tornado Warning 18, NWS Houston/Galveston, TX

June 30, 2010Galveston County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Jun 30, 2010, 6:22 PM CDT for Galveston County, Texas. It was in force for 11 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: Jun 30, 2010, 6:22 PM CDT (23:22 UTC)
Expired: Jun 30, 2010, 6:33 PM CDT
In force: 11 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

County Galveston County, TX

The radar

The Houston radar (KHGX), 32 km from the middle of the area, began a volume at 23:24 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

Corpus Christi, TX (KCRP), launched 12:00Z, 11.4 hours before the alert went out and 302 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: 16 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 629 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jun 30, 2:44 PM CDT, 3 hours 38 minutes earlier.

Area forecast discussion, Jun 30, 2:44 PM CDT, 3 hours 38 minutes before

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Hazardous weather outlook, Jun 30, 7:48 AM CDT, 10 hours 34 minutes before

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In the hours before

Special weather statement, Jun 30, 1:11 PM CDT, 5 hours 11 minutes before

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Special weather statement, Jun 30, 1:49 PM CDT, 4 hours 33 minutes before

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Local storm report, Jun 30, 2:10 PM CDT, 4 hours 12 minutes before

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Local storm report, Jun 30, 2:50 PM CDT, 3 hours 32 minutes before

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Special weather statement, Jun 30, 5:28 PM CDT, 54 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
Jun 29, 11:05 PM CDT	Coastal Flood Warning	HGX	Brazoria, Chambers, Galveston, Harris, Jackson, Matagorda	56 hr
Jun 30, 2:29 AM CDT	Special Marine Warning	HGX		61 min
Jun 30, 3:17 AM CDT	Special Marine Warning	HGX		58 min
Jun 30, 11:39 AM CDT	Special Weather Statement	HGX	Wharton	51 min
Jun 30, 11:59 AM CDT	Special Weather Statement	HGX	Brazoria	61 min
Jun 30, 12:33 PM CDT	Special Marine Warning	HGX		57 min
Jun 30, 1:11 PM CDT	Special Weather Statement	HGX	Galveston	34 min
Jun 30, 1:23 PM CDT	Special Marine Warning	HGX		67 min
Jun 30, 1:49 PM CDT	Special Weather Statement	HGX	Brazoria	56 min
Jun 30, 1:58 PM CDT	Tornado Warning	HGX	Brazoria, Matagorda	32 min
Jun 30, 4:15 PM CDT	Special Marine Warning	HGX		60 min
Jun 30, 5:31 PM CDT	Special Marine Warning	HGX		59 min

Nearby

Tornado Warnings in Texas, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.