Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 936

May 24, 201117 counties in Kansas; Franklin County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 24, 2011, 5:03 PM CDT for 17 counties in Kansas; Franklin County, Nebraska. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 24, 2011, 5:03 PM CDT (22:03 UTC)
Expired: May 24, 2011, 6:00 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center

Counties Clay County, KS, Cloud County, KS, Dickinson County, KS, Geary County, KS, Jewell County, KS, Lincoln County, KS, Mitchell County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Rooks County, KS, Smith County, KS, Wabaunsee County, KS, Washington County, KS, Franklin County, NE

The radar

The Grand Island radar (KUEX), 120 km from the middle of the area, began a volume at 22:05 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.

Tornado Watch 362May 24, 5:20 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 10.1 hours before the alert went out and 185 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 226 J/kg
Mixed-layer CIN: -381 J/kg
Mixed-layer LCL: 1158 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

321 
ACUS11 KWNS 242203
SWOMCD
SPC MCD 242203 
KSZ000-NEZ000-242300-

MESOSCALE DISCUSSION 0936
NWS STORM PREDICTION CENTER NORMAN OK
0503 PM CDT TUE MAY 24 2011

AREAS AFFECTED...N-CNTRL THROUGH NERN KS INTO EXTREME SRN NEB

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 

VALID 242203Z - 242300Z

SUPERCELL STORMS WILL CONTINUE DEVELOPING NORTHWARD INTO NRN KS NEXT
FEW HOUR. ACTIVITY MAY EVENTUALLY SPREAD INTO EXTREME SRN NEB.
TORNADOES AND LARGE HAIL WILL BE THE PRIMARY THREATS.

EARLY THIS EVENING A LINE OF DISCRETE SUPERCELLS ARE LIFTING NWD
THROUGH CNTRL AND S-CNTRL KS. SOME OF THE STORMS ARE APPROACHING THE
NRN EDGE OF WW 360. A FRONT EXTENDS FROM NERN KS WWD THROUGH N-CNTRL
KS. BOUNDARY LAYER IS COOLER...AND INSTABILITY GRADUALLY DECREASES
WITH NWD EXTENT AWAY FROM THE FRONT...BUT THE THERMODYNAMIC
ENVIRONMENT IS SUFFICIENT FOR SURFACE BASED STORMS. LARGE 0-1 KM
HODOGRAPHS WILL REMAIN VERY FAVORABLE FOR LOW LEVEL MESOCYCLONES AND
TORNADOES AS THE LLJ INCREASES THIS EVENING.

..DIAL.. 05/24/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...OAX...TOP...ICT...GID...GLD...

LAT...LON   38689661 39259931 39939986 40249921 39899665 39069583
            38689661

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 2:24 AM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Gove, Graham, Hodgeman and 12 more	96 min
May 24, 2:42 AM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Ellis, Gove, Graham, Greeley and 15 more	4 hr
May 24, 6:21 AM CDT	Mesoscale Discussion	SPC	Barton, Chase, Clay, Cloud, Dickinson, Edwards and 25 more	54 min
May 24, 6:51 AM CDT	Severe Thunderstorm Watch	SPC	Barton, Brown, Butler, Chase, Clay, Cloud and 37 more	5 hr
May 24, 9:18 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Chase, Clay and 28 more	87 min
May 24, 10:37 AM CDT	Mesoscale Discussion	SPC	Cheyenne, Rawlins, Sherman, Thomas	83 min
May 24, 12:59 PM CDT	Mesoscale Discussion	SPC	Barton, Edwards, Ellis, Ellsworth, Finney, Ford and 26 more	91 min
May 24, 1:27 PM CDT	Tornado Watch	SPC	Barber, Clark, Comanche, Edwards, Ellis, Finney and 30 more	6 hr
May 24, 2:35 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chase, Chautauqua, Coffey and 27 more	85 min
May 24, 3:14 PM CDT	Tornado Watch PDS	SPC	Allen, Barton, Butler, Chase, Chautauqua, Cowley and 20 more	9 hr
May 24, 5:19 PM CDT	Tornado Watch	SPC	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 23 more	7 hr

Nearby

Mesoscale Discussions in Kansas, 2011 Mesoscale Discussions in Nebraska, 2011 Every 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.