Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 607
The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2012, 3:44 PM CDT for 28 counties in Kansas. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2012, 3:44 PM CDT (20:44 UTC)
- Expired
- Apr 27, 2012, 4:45 PM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 28 counties
Allen County, KS, Anderson County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Elk County, KS, Geary County, KS, Greenwood County, KS, Lyon County, KS, Marion County, KS, Mitchell County, KS, Montgomery County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS
The radar
The Topeka radar (KTWX), 60 km from the middle of the area, began a volume at 20:48 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 nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 8.7 hours before the alert went out and 103 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.
114
ACUS11 KWNS 272045
SWOMCD
SPC MCD 272044
KSZ000-272145-
MESOSCALE DISCUSSION 0607
NWS STORM PREDICTION CENTER NORMAN OK
0344 PM CDT FRI APR 27 2012
AREAS AFFECTED...N-CNTRL/ERN KS
CONCERNING...TORNADO WATCH 194...
VALID 272044Z - 272145Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 194 CONTINUES.
LARGE HAIL THREAT CONTINUES AND TORNADIC POTENTIAL SHOULD INCREASE
/ESPECIALLY ALONG THE WARM FRONT NEAR THE I-70 CORRIDOR/...AS
SUPERCELL COVERAGE LIKELY INCREASES HERE IN THE NEXT FEW HOURS.
FARTHER S...SHOWERS HAVE STRUGGLED TO INTENSIFY ACROSS S-CNTRL KS
AND UNCERTAINTIES EXIST OVER THE SUSTAINABILITY OF SEVERE TSTMS WITH
SRN EXTENT.
20Z SURFACE ANALYSIS PLACED A 995 MB CYCLONE AROUND 40 N RSL WITH AN
ATTENDANT WARM FRONT EXTENDING SEWD TO NEAR EMP TO 20 E JLN...AND A
SURGING DRYLINE EXTENDING SWD NEAR ICT TO PNC. MOST PERSISTENT
CLUSTER OF TSTMS HAS PRODUCED SEVERE HAIL IN PORTIONS OF N-CNTRL
KS...ALONG AND JUST N OF THE SURFACE FRONT. RELATIVELY GREATER HAIL
AND TORNADO POTENTIAL WILL EXIST ALONG THE FRONT AS ADDITIONAL
SURFACE-BASED CELLS LIKELY PROPAGATE WITHIN THIS ZONE...BEFORE
BECOMING INCREASINGLY ELEVATED WITH NRN EXTENT.
DISCRETE CELLS ALONG THE DRYLINE IN S-CNTRL KS HAVE STRUGGLED TO
INTENSIFY AS FORCED ASCENT TIED TO THE COMPACT NWRN KS/SWRN NEB
IMPULSE HAS REMAINED FARTHER N. MODIFIED 18Z LMN RAOB SUGGESTS THAT
ALTHOUGH MLCIN IS MINIMAL...LOW RH AOA 3000 FT AGL IS LIKELY
RESULTING IN SUBSTANTIAL ENTRAINMENT OF DRY AIR WITH MIXED-LAYER
PARCELS. STILL...WITH STRONG LOW-LEVEL CONVERGENCE ALONG THE DRYLINE
AND A COUPLE MORE HOURS OF BOUNDARY LAYER HEATING...ALONG WITH
WEAKENING LARGE-SCALE DESCENT AS THE KS/NEB IMPULSE DAMPENS...A CELL
OR TWO COULD BECOME SUSTAINED INTO SERN KS BY EARLY EVENING.
..GRAMS.. 04/27/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TOP...ICT...GID...
LAT...LON 39769834 39859750 39589660 39099565 38089495 37489516
37219539 37119619 37489668 38419734 39509840 39769834SPC 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, 6:07 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Cherokee and 32 more | 113 min |
Nearby
Mesoscale Discussions in Kansas, 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.