Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 533
The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2011, 5:06 AM CDT for 7 counties in Arkansas; 14 counties in Missouri; 9 counties in Oklahoma. It was in force for 24 min.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2011, 5:06 AM CDT (10:06 UTC)
- Expired
- Apr 23, 2011, 5:30 AM CDT
- In force
- 24 min
- Issued by
- the Storm Prediction Center
All 30 counties
Benton County, AR, Boone County, AR, Carroll County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Washington County, AR, Barry County, MO, Christian County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Ottawa County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK
The radar
The Springfield radar (KSGF), 90 km from the middle of the area, began a volume at 10:09 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, 10.1 hours before the alert went out and 49 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.
273
ACUS11 KWNS 231006
SWOMCD
SPC MCD 231006
MOZ000-ARZ000-OKZ000-KSZ000-231030-
MESOSCALE DISCUSSION 0533
NWS STORM PREDICTION CENTER NORMAN OK
0506 AM CDT SAT APR 23 2011
AREAS AFFECTED...NERN OK...SWRN MO...NWRN AR
CONCERNING...SEVERE THUNDERSTORM WATCH 183...
VALID 231006Z - 231030Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 183
CONTINUES.
DEPENDING ON CONVECTIVE TRENDS NEXT 30 MIN OR SO...SEVERE
THUNDERSTORM WATCH 183 MAY NEED TO BE REPLACED BY ANOTHER WW BEFORE
ITS EXPIRATION TIME OF 11Z. SOME THREAT FOR ISOLATED LARGE HAIL AND
POSSIBLY DAMAGING WIND MAY CONTINUE FROM NERN OK...NWRN AR INTO SRN
MO.
A 40-50 KT SWLY LLJ WILL MAINTAIN ISENTROPIC LIFT NORTH OF STALLED
BOUNDARY FOR ELEVATED STORMS TO INCREASE FROM NERN OK SPREADING EWD
THROUGH NWRN AR AND SRN MO. STORMS DEVELOPING OVER NERN OK ARE IN
CLOSER PROXIMITY TO STRONGER INSTABILITY AND FEED OF HIGHER THETA-E
AIR...WHILE INSTABILITY DECREASES WITH ERN EXTENT INTO SRN MO AND
NWRN AR BASED ON LATEST OBJECTIVE ANALYSIS. THE PRIMARY THREAT IS
EXPECTED TO BE ISOLATED LARGE HAIL...BUT IF STORMS GROW UPSCALE THE
THREAT FOR DAMAGING WIND COULD ALSO INCREASE.
..DIAL.. 04/23/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...SGF...TSA...
LAT...LON 35909311 35679470 35779595 36629595 37369381 37699166
36819132 35909311SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:29 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Clay, Fulton, Greene, Izard and 7 more | 91 min |
| Apr 22, 8:09 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Madison, Washington | 96 min |
| Apr 22, 9:39 PM CDT | Mesoscale Discussion | SPC | Carroll, Crawford, Franklin, Madison, Sebastian, Washington | 66 min |
| Apr 22, 11:04 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Madison, Marion and 3 more | 7 hr |
| Apr 22, 11:10 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Crawford, Franklin and 4 more | 2 hr |
| Apr 23, 2:33 AM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Madison, Marion, Washington | 87 min |
| Apr 23, 1:04 PM CDT | Mesoscale Discussion | SPC | Clay, Craighead, Mississippi | 86 min |
| Apr 23, 5:02 PM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Crawford and 21 more | 58 min |
| Apr 23, 5:09 PM CDT | Mesoscale Discussion | SPC | Baxter, Clay, Fulton, Randolph | 2 hr |
| Apr 23, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 30 more | 6 hr |
| Apr 22, 9:20 PM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Iron, Jefferson, Madison, Mississippi and 9 more | 55 min |
| Apr 23, 1:04 AM CDT | Tornado Watch | SPC | Bollinger, Butler, Cape Girardeau, Carter, Crawford, Iron and 11 more | 4 hr |
| Apr 23, 3:41 AM CDT | Mesoscale Discussion | SPC | Bollinger, Cape Girardeau, Madison, Mississippi, Perry, Sainte Genevieve and 3 more | 94 min |
| Apr 22, 11:35 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Carter, Cleveland, Coal, Comanche, Cotton and 19 more | 4 hr |
| Apr 23, 2:08 AM CDT | Mesoscale Discussion | SPC | Latimer, LeFlore, Pittsburg, Pushmataha | 67 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 |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Arkansas, 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.