Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 608
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2012, 6:07 PM CDT for 4 states. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2012, 6:07 PM CDT (23:07 UTC)
- Expired
- Apr 27, 2012, 8:00 PM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 56 counties
Allen County, KS, Anderson County, KS, Atchison County, KS, Bourbon County, KS, Brown County, KS, Cherokee County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Crawford County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell 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, Morris County, KS, Nemaha County, KS, Neosho County, KS, Osage County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Barton County, MO, Bates County, MO, Buchanan County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Clinton County, MO, Jackson County, MO, Jasper County, MO, Platte County, MO, Vernon County, MO, Jefferson County, NE, Nuckolls County, NE, Pawnee County, NE, Richardson County, NE, Thayer County, NE, Craig County, OK, Ottawa County, OK
The radar
The Topeka radar (KTWX), 57 km from the middle of the area, began a volume at 23:10 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 12:00Z, 11.1 hours before the alert went out and 46 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
- 1420 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 272 m²/s²
- 0-3 km storm-relative helicity
- 417 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
671
ACUS11 KWNS 272307
SWOMCD
SPC MCD 272307
MOZ000-OKZ000-KSZ000-NEZ000-280100-
MESOSCALE DISCUSSION 0608
NWS STORM PREDICTION CENTER NORMAN OK
0607 PM CDT FRI APR 27 2012
AREAS AFFECTED...ERN KS...SERN NEB...WRN MO...FAR NERN OK
CONCERNING...TORNADO WATCH 194...
VALID 272307Z - 280100Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 194 CONTINUES.
A BAND OF SEVERE THUNDERSTORMS CONTINUES TO RAPIDLY MOVE NEWD ACROSS
KS AND INTO SERN NEB. SURFACE ANALYSIS SHOWS THAT MOST OF THE
ACTIVITY IS NOW ALONG OR N OF THE WARM FRONT...WITH ONLY A VERY
NARROW WARM SECTOR REMAINING OVER SERN KS AS THE DRYLINE ADVANCES
EWD.
VISIBLE IMAGERY SHOWS A SHALLOW CU FIELD OVER SERN KS WITH BILLOW
CLOUDS OVER SWRN MO AND ERN OK. HERE..CAPPING IS HAMPERING
DEVELOPMENT...AND VERY DRY AIR AND SUBSIDENCE EXISTS ALOFT.
HOWEVER...SATELLITE IMAGERY SHOWS EITHER SLIGHT LIFT OR AN END TO
THE MIDLEVEL SUBSIDENCE NOW MOVING EWD ACROSS NRN OK. AS THIS
FEATURE ROTATES ENEWD ACROSS THE NARROW WARM SECTOR AND WARM
FRONT...SOME ENHANCEMENT TO LIFT MAY OCCUR. BUT...IT MAY COME TOO
LATE FOR SURFACE BASED DEVELOPMENT...RESULTING IN A FEW ELEVATED
HAIL STORMS INTO WRN MO. CONDITIONALLY...SHEAR PROFILES ARE VERY
FAVORABLE FOR SUPERCELLS IN THESE AREAS.
..JEWELL.. 04/27/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TSA...OAX...TOP...ICT...GID...
LAT...LON 37879377 37209398 36969434 36599473 36679537 37249582
37999614 38609659 38979710 39209768 39519826 39949876
40179853 40229668 40209576 39919471 39519418 38929396
37879377SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 9:41 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Grant, Greeley, Hamilton, Kearny, Logan and 7 more | 2 hr |
| Apr 26, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Grant, Greeley, Hamilton, Kearny, Logan and 8 more | 7 hr |
| Apr 27, 2:24 AM CDT | Mesoscale Discussion | SPC | Cheyenne, Grant, Greeley, Hamilton, Kearny, Morton and 5 more | 2 hr |
| Apr 27, 4:43 AM CDT | Mesoscale Discussion | SPC | Cheyenne, Grant, Greeley, Hamilton, Haskell, Kearny and 8 more | 32 min |
| Apr 27, 6:16 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Coffey and 22 more | 59 min |
| Apr 27, 10:15 AM CDT | Mesoscale Discussion | SPC | Barber, Barton, Butler, Cowley, Dickinson, Ellis and 21 more | 2 hr |
| Apr 27, 1:29 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 34 more | 91 min |
| Apr 27, 2:11 PM CDT | Tornado Watch | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 46 more | 7 hr |
| Apr 27, 3:44 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Clay and 22 more | 61 min |
Nearby
Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Missouri, 2012Mesoscale Discussions in Nebraska, 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.