Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 951
The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2020, 6:56 AM CDT for Bryan County, Choctaw County, Oklahoma; 23 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 21, 2020, 6:56 AM CDT (11:56 UTC)
- Expired
- Jun 21, 2020, 9:00 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 289
All 25 counties
Bryan County, OK, Choctaw County, OK, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Montague County, TX, Parker County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Tarrant County, TX, Titus County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 127 km from the middle of the area, began a volume at 11:59 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 00:00Z, 11.9 hours before the alert went out and 110 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
- 1508 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1465 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.0
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 20, 11:13 PM CDT | Mesoscale Discussion | SPC | Harper | 92 min |
| Jun 21, 1:01 AM CDT | Mesoscale Discussion | SPC | Carter, Cotton, Jefferson, Love, Marshall, Stephens and 1 more | 119 min |
| Jun 21, 1:21 AM CDT | Severe Thunderstorm Watch | SPC | Bryan, Carter, Cotton, Jefferson, Johnston, Love and 3 more | 6 hr |
| Jun 21, 3:04 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Dewey, Ellis, Harmon, Harper and 4 more | 116 min |
| Jun 21, 5:50 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 40 more | 9 hr |
Nearby
Mesoscale Discussions in Texas, 2020Mesoscale Discussions in Oklahoma, 2020Every mesoscale discussion in 2020
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.