Alert archive / Texas / Mesoscale Discussions in 2009
Mesoscale Discussion 360
The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2009, 1:32 AM CDT for 5 counties in Arkansas; 5 parishes in Louisiana; 68 counties in Texas. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Apr 2, 2009, 1:32 AM CDT (06:32 UTC)
- Expired
- Apr 2, 2009, 2:30 AM CDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 78 counties
Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Red River Parish, LA, Webster Parish, LA, Anderson County, TX, Angelina County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Bowie County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Coryell County, TX, Falls County, TX, Franklin County, TX, Freestone County, TX, Gillespie County, TX, Gregg County, TX, Grimes County, TX, Hamilton County, TX, Harrison County, TX, Hays County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Kaufman County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, Marion County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Polk County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rusk County, TX, San Augustine County, TX, San Jacinto County, TX, San Saba County, TX, Shelby County, TX, Smith County, TX, Sutton County, TX, Titus County, TX, Travis County, TX, Trinity County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Washington County, TX, Williamson County, TX, Wood County, TX
The radar
The Ft Hood radar (KGRK), 121 km from the middle of the area, began a volume at 06:33 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 6.5 hours before the alert went out and 155 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3418 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Apr 2, 4:43 AM CDT | Severe Thunderstorm Watch | SPC | Columbia, Hempstead, Lafayette, Miller, Nevada, Union | 6 hr |
| Apr 2, 7:36 AM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Miller, Nevada, Ouachita and 1 more | 54 min |
| Apr 2, 8:01 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 24 more | 59 min |
| Apr 2, 9:24 AM CDT | Tornado Watch | SPC | Ashley, Chicot | 7 hr |
| Apr 2, 12:50 PM CDT | Mesoscale Discussion | SPC | Conway, Crawford, Faulkner, Franklin, Garland, Grant and 12 more | 85 min |
| Apr 2, 3:36 PM CDT | Mesoscale Discussion | SPC | Arkansas, Chicot, Desha, Lee, Monroe, Phillips | 54 min |
| Apr 2, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Chicot, Cross, Desha, Drew, Jefferson and 9 more | 4 hr |
| Apr 2, 5:36 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Crittenden, Cross, Greene, Jackson and 7 more | 84 min |
| Apr 2, 6:21 PM CDT | Tornado Watch | SPC | Crittenden, Mississippi | 3 hr |
| Apr 2, 5:57 AM CDT | Mesoscale Discussion | SPC | Plaquemines | 63 min |
| Apr 2, 11:51 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more | 84 min |
| Apr 2, 1:49 AM CDT | Severe Thunderstorm Watch | SPC | Anderson, Austin, Bastrop, Bell, Blanco, Bosque and 52 more | 7 hr |
| Apr 2, 4:42 AM CDT | Mesoscale Discussion | SPC | Anderson, Bastrop, Brazos, Burleson, Falls, Freestone and 19 more | 63 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.