Alert archive / Texas / Mesoscale Discussions in 2020
Mesoscale Discussion 470
The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2020, 3:20 PM CDT for Little River County, Polk County, Sevier County, Arkansas; 18 counties in Oklahoma; 33 counties in Texas. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2020, 3:20 PM CDT (20:20 UTC)
- Expired
- Apr 24, 2020, 5:15 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 54 counties
Little River County, AR, Polk County, AR, Sevier County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, McCurtain County, OK, McIntosh County, OK, Okfuskee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Anderson County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Collin County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Navarro County, TX, Panola County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 189 km from the middle of the area, began a volume at 20:22 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, 8.3 hours before the alert went out and 171 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2532 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 609 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 24, 3:44 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 6 hr |
| Apr 24, 4:49 PM CDT | Tornado Watch | SPC | Clark, Columbia, Garland, Hempstead, Hot Spring, Howard and 9 more | 7 hr |
| Apr 24, 6:40 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Conway, Crawford, Franklin, Johnson and 9 more | 2 hr |
| Apr 24, 1:07 PM CDT | Mesoscale Discussion | SPC | Cherokee, Craig, Creek, Delaware, Kay, Mayes and 9 more | 113 min |
Nearby
Mesoscale Discussions in Texas, 2020Mesoscale Discussions in Oklahoma, 2020Mesoscale Discussions in Arkansas, 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.