Alert archive / Missouri / Mesoscale Discussions in 2011
Mesoscale Discussion 2014
The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2011, 11:46 PM CDT for 4 states. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2011, 11:46 PM CDT (04:46 UTC)
- Expired
- Aug 19, 2011, 12:45 AM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 94 counties
Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Washington County, AR, Allen County, KS, Anderson County, KS, Atchison County, KS, Bourbon County, KS, Brown County, KS, Chase County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Crawford County, KS, Doniphan County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Labette County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marshall County, KS, Miami County, KS, Montgomery County, KS, Nemaha County, KS, Neosho County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Buchanan County, MO, Caldwell County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Christian County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Livingston County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Newton County, MO, Ozark County, MO, Pettis County, MO, Platte County, MO, Polk County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Webster County, MO, Wright County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Ottawa County, OK, Washington County, OK
The radar
The Pleasant Hill radar (KEAX), 69 km from the middle of the area, began a volume at 04:48 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 4.8 hours before the alert went out and 137 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
- 3749 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1481 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 17.9
The text
As transmitted, in the capitals the NWS used until 2016.
812
ACUS11 KWNS 190446
SWOMCD
SPC MCD 190446
ARZ000-MOZ000-OKZ000-KSZ000-190545-
MESOSCALE DISCUSSION 2014
NWS STORM PREDICTION CENTER NORMAN OK
1146 PM CDT THU AUG 18 2011
AREAS AFFECTED...ERN KS...WRN MO...NERN OK AND FAR NWRN AR
CONCERNING...SEVERE THUNDERSTORM WATCH 788...
VALID 190446Z - 190545Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 788
CONTINUES.
A NEW WW MAY BE NEEDED SOON SOUTH OF WW 788 INTO SERN KS/SWRN MO TO
NERN OK/NWRN AR...GIVEN ONGOING SEVERE WEATHER THREAT /MAINLY
DAMAGING WINDS/ WITH THE BOW ECHO SYSTEM CURRENTLY LOCATED OVER NERN
KS/NWRN MO.
AT 0430Z...REGIONAL RADAR IMAGERY SHOWED A WELL DEFINED BOW ECHO
SYSTEM EXTENDING FROM CALDWELL COUNTY MO SWWD TO THE BOW APEX IN
JOHNSON COUNTY KS AND THEN NWWD TO POTTAWATOMIE COUNTY KS...WITH
THIS BOW MOVING SSEWD AT 35 KT. RECENT REPORTS HAVE INDICATED
SEVERE WIND GUSTS FROM TOP THROUGH THE KANSAS CITY METRO AREA
INCLUDING DAMAGING WIND GUSTS AND HAIL AROUND 1 INCH IN DIAMETER.
IR SATELLITE IMAGERY INDICATED CLOUD TOPS REMAIN COLD WITH NO SIGN
OF WARMING. MEANWHILE...A 40 KT SWLY LLJ PER TOP WSR-88D VAD IS
RESULTING IN STRONG LOW LEVEL WAA INTO NERN KS/NWRN MO WHICH WILL
CONTINUE TO SUPPORT NEW TSTM DEVELOPMENT. VEERING OF THE LLJ
OVERNIGHT SUGGESTS THIS FORWARD PROPAGATING MCS WILL CONTINUE TO
TRACK SWD INTO A MODERATELY UNSTABLE AIR MASS.
..PETERS.. 08/19/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LSX...LZK...SGF...EAX...TSA...TOP...ICT...
LAT...LON 37869233 36279205 35909296 35929432 36149528 37079649
37559668 38649658 39469665 39989649 39949553 39689474
39939346 39689274 39369247 37869233SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 12:02 AM CDT | Severe Thunderstorm Watch | SPC | Baxter, Benton, Boone, Carroll, Fulton, Izard and 6 more | 5 hr |
| Aug 19, 1:38 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Fulton, Madison and 5 more | 67 min |
| Aug 19, 4:08 AM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Fulton, Madison and 3 more | 67 min |
| Aug 18, 8:09 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Atchison, Brown, Coffey, Doniphan, Douglas and 18 more | 7 hr |
| Aug 18, 9:52 PM CDT | Mesoscale Discussion | SPC | Brown, Doniphan | 53 min |
| Aug 19, 3:42 PM CDT | Mesoscale Discussion | SPC | Barton, Clark, Comanche, Edwards, Ellis, Finney and 26 more | 63 min |
| Aug 18, 8:29 PM CDT | Mesoscale Discussion | SPC | Andrew, Atchison, DeKalb, Gentry, Holt, Nodaway and 1 more | 61 min |
| Aug 19, 1:08 AM CDT | Severe Thunderstorm Watch | SPC | Cole, Crawford, Franklin, Gasconade, Iron, Madison and 5 more | 4 hr |
Nearby
Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Kansas, 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.