Alert archive / Texas / Tornado Warnings in 2010

Tornado Warning 19, NWS Houston/Galveston, TX

July 7, 2010Houston County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Jul 7, 2010, 2:17 PM CDT for Houston County, Texas. It was in force for 13 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: Jul 7, 2010, 2:17 PM CDT (19:17 UTC)
Expired: Jul 7, 2010, 2:30 PM CDT
In force: 13 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

County Houston County, TX

The radar

The Shreveport radar (KSHV), 195 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 251 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: 2156 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 476 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 7:01 PM CDT	Areal Flood Advisory	HGX	Fort Bend	59 min
Jul 7, 3:15 AM CDT	Small Craft Advisory	HGX		44 hr
Jul 7, 4:44 AM CDT	Flash Flood Watch	HGX	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more	42 hr
Jul 7, 10:19 AM CDT	Special Marine Warning	HGX		41 min
Jul 7, 11:21 AM CDT	Areal Flood Advisory	HGX	Galveston, Harris	114 min
Jul 7, 1:30 PM CDT	Areal Flood Advisory	HGX	Matagorda, Wharton	2 hr
Jul 7, 2:00 PM CDT	Coastal Flood Statement	HGX	Jackson, Matagorda	19 hr
Jul 7, 2:00 PM CDT	Coastal Flood Warning	HGX	Brazoria, Chambers, Galveston, Harris, Matagorda	47 hr
Jul 7, 2:00 PM CDT	Coastal Flood Advisory	HGX	Harris	18 hr
Jul 7, 5:14 PM CDT	Special Weather Statement	HGX	Harris	31 min
Jul 7, 5:39 PM CDT	Areal Flood Advisory	HGX	Harris	66 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.