Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 166

February 5, 200820 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2008, 5:54 PM CST for 20 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Feb 5, 2008, 5:54 PM CST (23:54 UTC)
Expired: Feb 5, 2008, 7:30 PM CST
In force: 96 min
Issued by: the Storm Prediction Center

Counties Austin County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Montgomery County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 36 km from the middle of the area, began a volume at 23:56 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, 11.9 hours before the alert went out and 278 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: 847 J/kg
Mixed-layer CIN: -430 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 273 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 5, 2:00 AM CST	Mesoscale Discussion	SPC	Bandera, Blanco, Bosque, Brown, Burnet, Callahan and 40 more	3 hr
Feb 5, 2:28 AM CST	Severe Thunderstorm Watch	SPC	Bell, Bosque, Collin, Comanche, Cooke, Coryell and 36 more	6 hr
Feb 5, 5:03 AM CST	Mesoscale Discussion	SPC	Bosque, Collin, Cooke, Dallas, Delta, Denton and 17 more	117 min
Feb 5, 11:16 AM CST	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Gregg, Harrison and 14 more	89 min
Feb 5, 11:56 AM CST	Tornado Watch	SPC	Bowie, Camp, Cass, Delta, Fannin, Franklin and 11 more	7 hr
Feb 5, 2:15 PM CST	Mesoscale Discussion	SPC	Anderson, Bowie, Camp, Cass, Collin, Dallas and 23 more	90 min
Feb 5, 3:17 PM CST	Mesoscale Discussion	SPC	Bowie, Delta, Franklin, Hopkins, Lamar, Rains and 2 more	88 min
Feb 5, 3:59 PM CST	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Cherokee, Gregg, Harrison, Leon and 7 more	4 hr

Nearby

Mesoscale Discussions in Texas, 2008 Every mesoscale discussion 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.