Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 978
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2020, 3:55 AM CDT for 24 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2020, 3:55 AM CDT (08:55 UTC)
- Expired
- Jun 23, 2020, 5:30 AM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 297
All 24 counties
Bosque County, TX, Brown County, TX, Collin County, TX, Comanche County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, McCulloch County, TX, McLennan County, TX, Mills County, TX, Parker County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 63 km from the middle of the area, began a volume at 08:54 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, 8.9 hours before the alert went out and 82 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
- 1546 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1516 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
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 22, 8:21 PM CDT | Mesoscale Discussion | SPC | Armstrong, Baylor, Briscoe, Carson, Castro, Childress and 26 more | 84 min |
| Jun 22, 9:06 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Bailey, Baylor, Borden, Briscoe, Childress and 41 more | 8 hr |
| Jun 22, 11:24 PM CDT | Mesoscale Discussion | SPC | Archer, Bailey, Baylor, Borden, Briscoe, Childress and 33 more | 2 hr |
| Jun 23, 1:16 AM CDT | Mesoscale Discussion | SPC | Archer, Borden, Brown, Callahan, Clay, Coke and 28 more | 89 min |
| Jun 23, 1:33 AM CDT | Severe Thunderstorm Watch | SPC | Bosque, Brown, Callahan, Coke, Coleman, Collin and 36 more | 6 hr |
Nearby
Mesoscale Discussions in Texas, 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.