Alert archive / Texas / Mesoscale Discussions in 2019
Mesoscale Discussion 494
The Storm Prediction Center issued this mesoscale discussion at May 1, 2019, 3:25 PM CDT for 17 counties in Oklahoma; 35 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 1, 2019, 3:25 PM CDT (20:25 UTC)
- Expired
- May 1, 2019, 5:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Cooke County, TX, Eastland County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Kent County, TX, Knox County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Reagan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 103 km from the middle of the area, began a volume at 20:29 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, 8.4 hours before the alert went out and 138 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
- 2939 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 632 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 242 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 11.1
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 30, 9:41 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 8 more | 94 min |
| Apr 30, 10:58 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Choctaw, Haskell, Latimer, LeFlore and 5 more | 4 hr |
| May 1, 12:00 AM CDT | Mesoscale Discussion | SPC | Caddo, Carter, Cleveland, Comanche, Cotton, Garvin and 8 more | 2 hr |
| May 1, 12:21 PM CDT | Mesoscale Discussion | SPC | Caddo, Carter, Cleveland, Comanche, Cotton, Garvin and 15 more | 114 min |
| May 1, 1:00 PM CDT | Severe Thunderstorm Watch | SPC | Carter, Cleveland, Comanche, Cotton, Garvin, Grady and 11 more | 9 hr |
| May 1, 4:49 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Coal, Johnston, Latimer and 4 more | 116 min |
| May 1, 5:29 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Choctaw, Coal, Hughes, Latimer and 4 more | 8 hr |
Nearby
Mesoscale Discussions in Texas, 2019Mesoscale Discussions in Oklahoma, 2019Every mesoscale discussion in 2019
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.