Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 511
The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2012, 5:40 PM CDT for 20 counties in Kansas; 10 counties in Missouri. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2012, 5:40 PM CDT (22:40 UTC)
- Expired
- Apr 13, 2012, 6:45 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 30 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Johnson County, KS, Labette County, KS, Linn County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Osage County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Cass County, MO, Cedar County, MO, Dade County, MO, Henry County, MO, Jasper County, MO, Lawrence County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Pleasant Hill radar (KEAX), 114 km from the middle of the area, began a volume at 22:41 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
Topeka, KS (KTOP), launched 12:00Z, 10.7 hours before the alert went out and 136 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 602 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 525 m²/s²
- 0-3 km storm-relative helicity
- 689 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
243
ACUS11 KWNS 132240
SWOMCD
SPC MCD 132240
MOZ000-KSZ000-132345-
MESOSCALE DISCUSSION 0511
NWS STORM PREDICTION CENTER NORMAN OK
0540 PM CDT FRI APR 13 2012
AREAS AFFECTED...SE KS AND PORTIONS OF SW AND W CNTRL MO
CONCERNING...SEVERE THUNDERSTORM WATCH 161...
VALID 132240Z - 132345Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 161
CONTINUES.
TORNADO POTENTIAL IS INCREASING LATE THIS AFTERNOON ACROSS ERN
PORTIONS OF WW 161 MAY NEED AN UPGRADE TO A TORNADO WATCH.
CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED.
AS LOW LEVEL SHEAR INCREASES ACROSS SERN KS INTO SW/W-CNTRL
MO...SUPERCELL THUNDERSTORMS HAVE SHOWN SIGNS OF STRONGER ROTATION
OVER THE LAST HALF HOUR OR SO. IN FACT...WSR-88D VAD WIND PROFILES
FROM KINX SHOW LARGE LOW LEVEL HODOGRAPHS FAVORABLE FOR LOW LEVEL
ROTATION. AS THE LLJ CONTINUES TO STRENGTHEN THIS EVENING ACROSS THE
MOIST/UNSTABLE WARM SECTOR...THE TORNADO THREAT MAY INCREASE FOR
SEVERAL HOURS INTO THE MID EVENING HOURS. THIS AREA WILL CONTINUE TO
BE MONITORED.
..LEITMAN.. 04/13/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TOP...ICT...
LAT...LON 37089705 38659585 38899503 38919445 38819393 38299367
37459371 37029375 37009455 37089705SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 7:53 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Gove, Lane, Logan, Rawlins and 6 more | 97 min |
| Apr 12, 8:38 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Gove, Graham, Greeley, Lane and 9 more | 4 hr |
| Apr 12, 11:24 PM CDT | Mesoscale Discussion | SPC | Decatur, Gove, Graham, Norton, Phillips, Sheridan and 1 more | 96 min |
| Apr 13, 2:37 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 9 more | 113 min |
| Apr 13, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 19 more | 6 hr |
Nearby
Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Missouri, 2012Every mesoscale discussion in 2012
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.