Alert archive / Texas / Mesoscale Discussions in 2018
Mesoscale Discussion 666
The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2018, 4:44 PM CDT for 28 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2018, 4:44 PM CDT (21:44 UTC)
- Expired
- Jun 7, 2018, 6:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 28 counties
Camp County, TX, Collin County, TX, Dallas County, TX, Ellis County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Marion County, TX, Morris County, TX, Navarro County, TX, Panola County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 81 km from the middle of the area, began a volume at 21:47 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 (KBAD), launched 12:00Z, 9.7 hours before the alert went out and 252 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
- 162 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1454 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 10 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 |
|---|---|---|---|---|
| Jun 7, 8:42 AM CDT | Mesoscale Discussion | SPC | Cooke, Grayson | 2 hr |
| Jun 7, 3:10 PM CDT | Mesoscale Discussion | SPC | Briscoe, Childress, Collingsworth, Cottle, Dickens, Donley and 11 more | 95 min |
| Jun 7, 3:28 PM CDT | Severe Thunderstorm Watch | SPC | Baylor, Childress, Collingsworth, Cottle, Dickens, Donley and 13 more | 5 hr |
| Jun 7, 6:17 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Childress, Collingsworth, Cottle and 28 more | 118 min |
Nearby
Mesoscale Discussions in Texas, 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.