Alert archive / Oklahoma / Mesoscale Discussions in 2011
Mesoscale Discussion 529
The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2011, 2:08 AM CDT for 4 counties in Oklahoma. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2011, 2:08 AM CDT (07:08 UTC)
- Expired
- Apr 23, 2011, 3:15 AM CDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
Counties Latimer County, OK, LeFlore County, OK, Pittsburg County, OK, Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 108 km from the middle of the area, began a volume at 07:08 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
Springfield, MO (KSGF), launched 00:00Z, 7.1 hours before the alert went out and 278 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
- 2835 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 640 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 254 m²/s²
- Significant tornado parameter
- 4.7
- Supercell composite
- 18.1
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 22, 8:09 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Carter, Cherokee, Coal and 25 more | 96 min |
| Apr 22, 9:39 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Carter, Choctaw, Coal and 16 more | 66 min |
| Apr 22, 11:04 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Cherokee, Craig, Delaware, Mayes, Nowata and 3 more | 7 hr |
| Apr 22, 11:10 PM CDT | Mesoscale Discussion | SPC | Adair, Alfalfa, Blaine, Caddo, Canadian, Cherokee and 46 more | 2 hr |
| Apr 22, 11:35 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Carter, Cleveland, Coal, Comanche, Cotton and 19 more | 4 hr |
| Apr 23, 2:33 AM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 3 more | 87 min |
| Apr 23, 5:06 AM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Delaware, Mayes, Ottawa and 3 more | 24 min |
| Apr 23, 12:56 PM CDT | Mesoscale Discussion | SPC | Bryan, Carter, Choctaw, Jefferson, Johnston, Love and 2 more | 64 min |
| Apr 23, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Cotton and 11 more | 9 hr |
| Apr 23, 5:02 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Choctaw, Haskell, Latimer, LeFlore and 4 more | 58 min |
Nearby
Mesoscale Discussions in Oklahoma, 2011Every mesoscale discussion in 2011
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.