Alert archive / Oklahoma / Mesoscale Discussions in 2015
Mesoscale Discussion 244
The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2015, 7:45 PM CDT for 13 counties in Kansas; 28 counties in Oklahoma. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2015, 7:45 PM CDT (00:45 UTC)
- Expired
- Apr 8, 2015, 9:15 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 41 counties
Barber County, KS, Butler County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, McPherson County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 55 km from the middle of the area, began a volume at 00:47 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
Norman, OK (KOUN), launched 00:00Z, 0.8 hours before the alert went out and 143 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
- 427 J/kg
- Mixed-layer CIN
- -258 J/kg
- Mixed-layer LCL
- 1139 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 251 m²/s²
- 0-3 km storm-relative helicity
- 302 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 |
|---|---|---|---|---|
| Apr 9, 1:32 PM CDT | Mesoscale Discussion | SPC | Ottawa | 118 min |
| Apr 9, 2:15 PM CDT | Mesoscale Discussion | SPC | McCurtain | 2 hr |
| Apr 9, 2:32 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Delaware and 8 more | 7 hr |
| Apr 9, 3:17 PM CDT | Severe Thunderstorm Watch | SPC | McCurtain | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Kansas, 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.