Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 812
The Storm Prediction Center issued this mesoscale discussion at May 15, 2007, 5:28 PM CDT for 8 counties in Arkansas; Bossier Parish, Caddo Parish, Webster Parish, Louisiana; 26 counties in Texas. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2007, 5:28 PM CDT (22:28 UTC)
- Expired
- May 15, 2007, 6:30 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 37 counties
Clark County, AR, Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Bossier Parish, LA, Caddo Parish, LA, Webster Parish, LA, Bosque County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Marion County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 121 km from the middle of the area, began a volume at 22:30 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
Shreveport, LA (KSHV), launched 12:00Z, 10.5 hours before the alert went out and 127 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
- 880 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 83 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 |
|---|---|---|---|---|
| May 15, 11:30 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Franklin and 12 more | 90 min |
| May 15, 12:37 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 11 more | 83 min |
| May 15, 4:58 PM CDT | Mesoscale Discussion | SPC | Craighead, Crittenden, Cross, Greene, Mississippi, Poinsett and 2 more | 62 min |
| May 15, 2:25 PM CDT | Mesoscale Discussion | SPC | Culberson, El Paso, Hudspeth, Jeff Davis, Presidio | 65 min |
Nearby
Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Arkansas, 2007Mesoscale Discussions in Louisiana, 2007Every mesoscale discussion in 2007
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.