Alert archive / Oklahoma / Mesoscale Discussions in 2015
Mesoscale Discussion 706
The Storm Prediction Center issued this mesoscale discussion at May 20, 2015, 1:10 AM CDT for 12 counties in Oklahoma; 9 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- May 20, 2015, 1:10 AM CDT (06:10 UTC)
- Expired
- May 20, 2015, 2:45 AM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 21 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Cotton County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Foard County, TX, Knox County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 88 km from the middle of the area, began a volume at 06:12 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, 6.2 hours before the alert went out and 150 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
- 1306 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 267 m²/s²
- 0-3 km storm-relative helicity
- 427 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 26.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:15 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Cotton, Garvin, Jefferson, Love and 6 more | 90 min |
| May 19, 8:58 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Carter, Coal, Comanche, Cotton and 13 more | 5 hr |
| May 19, 9:18 PM CDT | Mesoscale Discussion | SPC | Love | 87 min |
| May 19, 11:15 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Coal, Comanche, Cotton and 14 more | 90 min |
| May 20, 1:35 PM CDT | Mesoscale Discussion | SPC | Crane, Pecos, Terrell, Upton | 2 hr |
| May 20, 5:07 PM CDT | Mesoscale Discussion | SPC | Brewster, Crockett, Edwards, Kerr, Kimble, Kinney and 7 more | 53 min |
| May 20, 5:29 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Concho, Crane, Crockett, Edwards, Irion and 13 more | 6 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015
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.