Alert archive / Texas / Mesoscale Discussions in 2005
Mesoscale Discussion 268
The Storm Prediction Center issued this mesoscale discussion at Mar 7, 2005, 3:39 PM CST for 5 parishes in Louisiana; 31 counties in Texas. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Mar 7, 2005, 3:39 PM CST (21:39 UTC)
- Expired
- Mar 7, 2005, 5:15 PM CST
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 36 counties
Beauregard Parish, LA, Calcasieu Parish, LA, Natchitoches Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Angelina County, TX, Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 88 km from the middle of the area, began a volume at 21:40 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, 9.7 hours before the alert went out and 380 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.
- Mixed-layer CAPE
- 572 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 11:50 AM CST | Severe Thunderstorm Watch | SPC | Beauregard, Calcasieu, Cameron, Natchitoches, Sabine, Vernon | 6 hr |
| Mar 7, 12:00 PM CST | Mesoscale Discussion | SPC | Bossier, Caddo, Claiborne, Webster | 2 hr |
| Mar 7, 12:50 PM CST | Severe Thunderstorm Watch | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 3 more | 5 hr |
| Mar 7, 3:31 PM CST | Mesoscale Discussion | SPC | Bossier, Caddo, Claiborne, Union, Webster | 89 min |
| Mar 7, 9:08 AM CST | Mesoscale Discussion | SPC | Angelina, Aransas, Atascosa, Austin, Bastrop, Bee and 53 more | 97 min |
Nearby
Mesoscale Discussions in Texas, 2005Mesoscale Discussions in Louisiana, 2005Every mesoscale discussion in 2005
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.