Alert archive / Texas / Mesoscale Discussions in 2017
Mesoscale Discussion 1455
The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2017, 3:11 PM CDT for 7 counties in Oklahoma; 61 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2017, 3:11 PM CDT (20:11 UTC)
- Expired
- Aug 6, 2017, 5:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 68 counties
Bryan County, OK, Carter County, OK, Cotton County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Stephens County, OK, Archer County, TX, Baylor County, TX, Borden County, TX, Brown County, TX, Callahan County, TX, Camp County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Fisher County, TX, Franklin County, TX, Glasscock County, TX, Grayson County, TX, Haskell County, TX, Henderson County, TX, Hood County, TX, Hopkins County, TX, Howard County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kaufman County, TX, Kent County, TX, Lamar County, TX, Midland County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Smith County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Upshur County, TX, Van Zandt County, TX, Wichita County, TX, Wise County, TX, Wood County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 80 km from the middle of the area, began a volume at 20:11 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 12:00Z, 8.2 hours before the alert went out and 113 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
- 1278 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1191 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 255 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
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 |
|---|---|---|---|---|
| Aug 5, 7:04 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Blaine, Cherokee, Craig, Creek, Custer and 17 more | 9 hr |
| Aug 5, 9:17 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Canadian, Custer, Dewey, Garfield and 14 more | 88 min |
| Aug 5, 11:46 PM CDT | Mesoscale Discussion | SPC | Blaine, Canadian, Craig, Creek, Custer, Kingfisher and 15 more | 59 min |
Nearby
Mesoscale Discussions in Texas, 2017Mesoscale Discussions in Oklahoma, 2017Every mesoscale discussion in 2017
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.