Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 2298
The Storm Prediction Center issued this mesoscale discussion at Nov 8, 2011, 1:17 AM CST for 22 counties in Arkansas; 45 counties in Missouri; 13 counties in Oklahoma. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Nov 8, 2011, 1:17 AM CST (07:17 UTC)
- Expired
- Nov 8, 2011, 3:15 AM CST
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 80 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Fulton County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, Yell County, AR, Audrain County, MO, Barry County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Christian County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Louis County, MO, Shannon County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Atoka County, OK, Cherokee County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK
The radar
The Springfield radar (KSGF), 46 km from the middle of the area, began a volume at 07:21 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, 7.3 hours before the alert went out and 45 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
- 337 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 664 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 271 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.1
The text
As transmitted, in the capitals the NWS used until 2016.
799
ACUS11 KWNS 080718
SWOMCD
SPC MCD 080717
ILZ000-MOZ000-ARZ000-OKZ000-080915-
MESOSCALE DISCUSSION 2298
NWS STORM PREDICTION CENTER NORMAN OK
0117 AM CST TUE NOV 08 2011
AREAS AFFECTED...PARTS OF ERN OK...NWRN AR...AND SWRN THRU E CNTRL
MO
CONCERNING...SEVERE THUNDERSTORM WATCH 871...873...
VALID 080717Z - 080915Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
871...873...CONTINUES.
ADDITIONAL WWS EASTWARD ACROSS PARTS OF THE OZARK PLATEAU AND MIDDLE
MISSISSIPPI VALLEY OVERNIGHT ARE NOT ANTICIPATED. BUT THE SEVERE
WEATHER THREAT...MAINLY IN THE FORM OF LOCALLY STRONG WIND
GUSTS...MAY NOT BE COMPLETELY NEGLIGIBLE.
THE PRE-FRONTAL SQUALL LINE CONTINUES TO SPREAD OUT OF THE SOUTH
CENTRAL PLAINS...TOWARD THE MIDDLE MISSISSIPPI VALLEY...AS WEAK WAVE
MIGRATES NORTHEASTWARD ALONG THE FRONT ACROSS SOUTHEASTERN KANSAS
TOWARD THE MISSOURI OZARKS. RECENT TRENDS IN SATELLITE...RADAR AND
LIGHTNING DATA HAVE INDICATED SUBSTANTIAL WEAKENING OF
CONVECTION...AND THERE IS LITTLE TO SUGGEST A SUBSTANTIVE
RE-INTENSIFICATION WILL OCCUR OVERNIGHT...WITH FURTHER
DESTABILIZATION REMAINING VERY WEAK. HOWEVER...A FAIRLY STRONG
SOUTHERLY LOW-LEVEL JET IS EXPECTED TO CONTINUE SHIFTING NORTHWARD
INTO THE MIDDLE MISSISSIPPI VALLEY THROUGH 12Z...GENERALLY
COINCIDENT WITH THE LINGERING BAND OF CONVECTION. WITH AMBIENT WIND
FIELDS AS STRONG AS 40-50 KT BELOW 850 MB...SOME OF THIS MOMENTUM
MAY CONTINUE TO MIX DOWN TO THE SURFACE WITHIN OR NEAR HEAVIER RAIN
CORES...PERHAPS CONTRIBUTING TO OCCASIONAL ISOLATED STRONG WIND
GUSTS APPROACHING OR BRIEFLY EXCEEDING SEVERE LIMITS.
..KERR.. 11/08/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PAH...LSX...LZK...SGF...SHV...EAX...TSA...OUN...
LAT...LON 38349323 39309229 39239089 38659011 36919111 35959203
35169292 34249472 33979605 34479689 36059517 37149396
37819357 38349323SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 8, 9:38 AM CST | Mesoscale Discussion | SPC | Crawford, Franklin, Sebastian | 67 min |
| Nov 8, 10:31 AM CST | Mesoscale Discussion | SPC | Baxter, Clark, Cleburne, Columbia, Conway, Dallas and 31 more | 29 min |
| Nov 8, 10:49 AM CST | Tornado Watch | SPC | Clark, Cleburne, Columbia, Conway, Dallas, Faulkner and 25 more | 7 hr |
| Nov 8, 1:03 PM CST | Mesoscale Discussion | SPC | Calhoun, Clark, Columbia, Conway, Dallas, Faulkner and 22 more | 57 min |
| Nov 8, 3:48 PM CST | Mesoscale Discussion | SPC | Clark, Cleburne, Columbia, Conway, Faulkner, Garland and 18 more | 87 min |
| Nov 8, 5:09 PM CST | Mesoscale Discussion | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 7 more | 66 min |
| Nov 8, 5:30 PM CST | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 17 more | 7 hr |
| Nov 7, 7:43 PM CST | Mesoscale Discussion | SPC | Caddo, Canadian, Cleveland, Comanche, Cotton, Creek and 22 more | 62 min |
| Nov 7, 8:28 PM CST | Tornado Watch | SPC | Adair, Caddo, Canadian, Carter, Cherokee, Cleveland and 36 more | 8 hr |
| Nov 7, 11:20 PM CST | Mesoscale Discussion | SPC | Carter, Cherokee, Cleveland, Cotton, Craig, Creek and 22 more | 85 min |
| Nov 8, 2:12 AM CST | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Coal, Jefferson, Johnston and 4 more | 93 min |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Arkansas, 2011Mesoscale 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.