Alert archive / Texas / Mesoscale Discussions in 2009
Mesoscale Discussion 154
The Storm Prediction Center issued this mesoscale discussion at Feb 26, 2009, 8:29 PM CST for 5 counties in Arkansas; Bossier Parish, Louisiana; 18 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 26, 2009, 8:29 PM CST (02:29 UTC)
- Expired
- Feb 26, 2009, 10:30 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 24 counties
Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Bossier Parish, LA, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 147 km from the middle of the area, began a volume at 02:30 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
Fort Worth, TX (KFWD), launched 00:00Z, 2.5 hours before the alert went out and 191 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
- 1161 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 1925 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 138 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 |
|---|---|---|---|---|
| Feb 26, 6:12 PM CST | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Clark, Cleburne and 40 more | 8 hr |
| Feb 26, 7:42 PM CST | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Clark, Clay, Cleburne and 41 more | 93 min |
| Feb 26, 9:09 PM CST | Mesoscale Discussion | SPC | Arkansas, Clay, Craighead, Crittenden, Cross, Grant and 12 more | 96 min |
| Feb 26, 9:40 PM CST | Severe Thunderstorm Watch | SPC | Arkansas, Bradley, Calhoun, Clay, Cleveland, Craighead and 20 more | 5 hr |
| Feb 26, 10:36 PM CST | Mesoscale Discussion | SPC | Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 46 more | 114 min |
| Feb 27, 1:45 AM CST | Mesoscale Discussion | SPC | Arkansas, Cleveland, Craighead, Crittenden, Cross, Dallas and 18 more | 30 min |
| Feb 27, 8:29 AM CST | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more | 31 min |
| Feb 27, 8:40 AM CST | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Columbia and 7 more | 6 hr |
| Feb 27, 10:15 AM CST | Mesoscale Discussion | SPC | Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 10 more | 90 min |
| Feb 27, 12:16 PM CST | Mesoscale Discussion | SPC | Chicot | 89 min |
| Feb 27, 12:38 PM CST | Tornado Watch | SPC | Ashley, Chicot | 7 hr |
| Feb 27, 2:40 PM CST | Mesoscale Discussion | SPC | Arkansas, Clark, Cleveland, Conway, Dallas, Desha and 21 more | 65 min |
Nearby
Mesoscale Discussions in Texas, 2009Mesoscale Discussions in Arkansas, 2009Mesoscale Discussions in Louisiana, 2009Every mesoscale discussion in 2009
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.