Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 207
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2018, 1:55 PM CDT for Little River County, Arkansas; Choctaw County, McCurtain County, Oklahoma; 53 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2018, 1:55 PM CDT (18:55 UTC)
- Expired
- Apr 3, 2018, 3:30 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 56 counties
Little River County, AR, Choctaw County, OK, McCurtain County, OK, Anderson County, TX, Bell County, TX, Bosque County, TX, Bowie County, TX, Burnet County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Hamilton County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, Marion County, TX, McLennan County, TX, Milam County, TX, Morris County, TX, Nacogdoches County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Titus County, TX, Trinity County, TX, Upshur County, TX, Van Zandt County, TX, Williamson County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 95 km from the middle of the area, began a volume at 18:55 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 12:00Z, 6.9 hours before the alert went out and 111 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
- 1112 J/kg
- Mixed-layer CIN
- -284 J/kg
- Mixed-layer LCL
- 607 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 448 m²/s²
- 0-3 km storm-relative helicity
- 477 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 10:26 AM CDT | Severe Thunderstorm Watch | SPC | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more | 8 hr |
| Apr 3, 12:57 PM CDT | Mesoscale Discussion | SPC | Baxter, Clark, Clay, Cleburne, Conway, Craighead and 39 more | 2 hr |
| Apr 3, 1:33 PM CDT | Tornado Watch | SPC | Arkansas, Baxter, Boone, Bradley, Calhoun, Clark and 51 more | 7 hr |
| Apr 3, 3:34 PM CDT | Mesoscale Discussion | SPC | Arkansas, Clark, Clay, Cleburne, Cleveland, Conway and 39 more | 86 min |
| Apr 3, 4:33 PM CDT | Mesoscale Discussion | SPC | Ashley, Chicot, Union | 57 min |
| Apr 3, 4:51 PM CDT | Severe Thunderstorm Watch | SPC | Ashley, Chicot, Union | 5 hr |
| Apr 3, 9:49 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bell, Brazos, Burleson, Burnet and 40 more | 116 min |
| Apr 3, 5:19 PM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Bastrop, Bell, Bexar, Blanco and 42 more | 86 min |
| Apr 3, 5:51 PM CDT | Severe Thunderstorm Watch | SPC | Austin, Bastrop, Bexar, Blanco, Brazos, Burleson and 34 more | 6 hr |
Nearby
Mesoscale Discussions in Texas, 2018Mesoscale Discussions in Oklahoma, 2018Mesoscale Discussions in Arkansas, 2018Every mesoscale discussion in 2018
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.