Alert archive / Kansas / Mesoscale Discussions in 2012
Mesoscale Discussion 2113
The Storm Prediction Center issued this mesoscale discussion at Nov 10, 2012, 7:31 PM CST for 36 counties in Kansas; 32 counties in Nebraska. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Nov 10, 2012, 7:31 PM CST (01:31 UTC)
- Expired
- Nov 10, 2012, 8:30 PM CST
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 68 counties
Barber County, KS, Barton County, KS, Clay County, KS, Cloud County, KS, Comanche County, KS, Dickinson County, KS, Edwards County, KS, Ellsworth County, KS, Geary County, KS, Harper County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Kiowa County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Pottawatomie County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Smith County, KS, Stafford County, KS, Sumner County, KS, Washington County, KS, Adams County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Webster County, NE, York County, NE
The radar
The Grand Island radar (KUEX), 85 km from the middle of the area, began a volume at 01:32 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
Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 132 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
- 567 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 1120 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
460
ACUS11 KWNS 110132
SWOMCD
SPC MCD 110131
IAZ000-NEZ000-KSZ000-OKZ000-110230-
MESOSCALE DISCUSSION 2113
NWS STORM PREDICTION CENTER NORMAN OK
0731 PM CST SAT NOV 10 2012
AREAS AFFECTED...ERN NEB/CENTRAL KS
CONCERNING...SEVERE THUNDERSTORM WATCH 675...
VALID 110131Z - 110230Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 675
CONTINUES.
SUMMARY...THE THREAT OF SVR TSTMS CONTINUES ACROSS WW WITH BOTH
SEMI-DISCRETE STORMS AND LINES/BOWING SEGMENTS EXPECTED THROUGH 05Z.
DAMAGING WINDS ARE LIKELY...ALONG WITH LARGE HAIL. A TORNADO OR TWO
REMAINS POSSIBLE...ESPECIALLY WITH THE MORE PRONOUNCED BOWING
SEGMENTS.
DISCUSSION...SEVERAL AREAS OF SVR TSTMS ARE IN PROGRESS ACROSS WW
EARLY THIS EVENING. 00Z MESOANALYSIS PLACED A COLD FRONT FROM JUST E
OF KOFK SWWD TO KHSI AND THEN INTO WEST-CENTRAL KS. A DRYLINE
EXTENDED SWD FROM A LOW PRESSURE CENTER OVER NORTH-CENTRAL KS TO
JUST E OF KDDC. THE ENVIRONMENT IN ADVANCE OF THESE FEATURES OVER
THE WW AREA IS CHARACTERIZED BY 500 TO LOCALLY 1000 J/KG OF MLCAPE
AND 45 TO 55 KTS OF DEEP-LAYER SHEAR...STRONGEST OVER SRN PORTIONS
OF WW. THE TENDENCY HAS BEEN FOR STORMS TO FORM INTO LINES/BOWING
SEGMENTS PRODUCING DAMAGING WINDS...SOME SIGNIFICANT...AND SEVERAL
REPORTS OF LARGE HAIL. THIS TREND IS EXPECTED TO CONTINUE THROUGH
THE REMAINING VALID PERIOD OF THE WW AS STRONG FORCING CONTINUES TO
OVERSPREAD THE AREA...AND COLDER AIR ALOFT OFFSETS DIURNAL COOLING
MAINTAINING AN AXIS OF MODEST INSTABILITY. LOW-LEVEL SHEAR REMAINS
QUITE STRONG /0-1 KM SRH 250-300 M2/S2 FROM KTOP AND KOAX 00Z
SOUNDINGS...AND A COUPLE TORNADOES REMAIN POSSIBLE WITH THE MORE
PRONOUNCED BOWING SEGMENTS AND WITH ANY DISCRETE STORM THAT FORMS.
..BUNTING/MEAD.. 11/11/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FSD...OAX...TOP...ICT...OUN...GID...DDC...
LAT...LON 41239819 41739781 42179710 42309674 42159630 41119580
39989609 36989720 36999955 39209910 41239819SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 10, 10:05 PM CST | Mesoscale Discussion | SPC | Barber, Clay, Dickinson, Geary, Harper, Harvey and 15 more | 55 min |
| Nov 11, 5:49 AM CST | Mesoscale Discussion | SPC | Allen, Bourbon, Cherokee, Crawford, Johnson, Labette and 4 more | 86 min |
Nearby
Mesoscale Discussions in Kansas, 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.