Alert archive / Texas / Wind Advisories in 2008

Wind Advisory 19, NWS Houston/Galveston, TX

December 9, 200823 counties in Texas

NWS Houston/Galveston, TX issued this wind advisory at Dec 9, 2008, 3:23 PM CST for 23 counties in Texas. It took effect at Dec 9, 2008, 5:40 PM CST. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Dec 9, 2008, 3:23 PM CST (21:23 UTC)
In effect from: Dec 9, 2008, 5:40 PM CST
Expired: Dec 10, 2008, 10:00 AM CST
In force: 16 hr
Issued by: NWS Houston/Galveston, TX

All 23 counties

Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 21:23 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, 9.4 hours before the alert went out and 242 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: 1848 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 464 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 424 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 20.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind advisory 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 wind advisory went out at Dec 9, 2:52 PM CST, 31 minutes earlier.

Area forecast discussion, Dec 9, 2:52 PM CST, 31 minutes before

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Hazardous weather outlook, Dec 9, 7:12 AM CST, 8 hours 11 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
Dec 9, 2:30 PM CST	Severe Thunderstorm Warning	HGX	Harris, Liberty	45 min
Dec 9, 3:07 PM CST	Gale Warning	HGX		19 hr

Nearby

Wind Advisories in Texas, 2008 Every wind advisory 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.