Alert archive / Kansas / Mesoscale Discussions in 2012

Mesoscale Discussion 900

May 25, 201211 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2012, 8:29 PM CDT for 11 counties in Kansas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 25, 2012, 8:29 PM CDT (01:29 UTC)
Expired: May 25, 2012, 10:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Barton County, KS, Ellis County, KS, Ellsworth County, KS, Lincoln County, KS, Mitchell County, KS, Ness County, KS, Osborne County, KS, Pawnee County, KS, Rooks County, KS, Rush County, KS, Russell County, KS

The radar

The Dodge City radar (KDDC), 110 km from the middle of the area, began a volume at 01:30 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

Dodge City, (KDDC), launched 00:00Z, 1.5 hours before the alert went out and 106 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: 1736 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 2725 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.4

Open this sounding in Storm Lab

The text

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

216 
ACUS11 KWNS 260129
SWOMCD
SPC MCD 260129 
KSZ000-260330-

MESOSCALE DISCUSSION 0900
NWS STORM PREDICTION CENTER NORMAN OK
0829 PM CDT FRI MAY 25 2012

AREAS AFFECTED...W CENTRAL KS

CONCERNING...TORNADO WATCH 298...

VALID 260129Z - 260330Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 298 CONTINUES.

SUMMARY...THREAT FOR LARGE HAIL AND LOCALLY DAMAGING WINDS ALONG
WITH ISOLATED TORNADOES CONTINUES ACROSS W CENTRAL KS -- IN AND NEAR
TORNADO WATCH 298.

DISCUSSION...LATEST RADAR IMAGERY SHOWS A PERSISTENT CLUSTER OF
SUPERCELL STORMS ACROSS NESS/RUSH/ELLIS/RUSSELL COUNTIES IN W
CENTRAL KS...ALONG A SLOWLY NWD-MOVING WARM FRONT AND JUST EAST OF
THE RETREATING DRYLINE.  

WHILE THE EVENING DDC RAOB SHOWED A DEEP/WELL-MIXED BOUNDARY
LAYER...OBSERVED SURFACE TEMPERATURES ARE ROUGHLY 10 DEGREES F
COOLER AND DEWPOINTS ROUGHLY 10 DEGREES F HIGHER NEAR THIS CLUSTER
OF STORMS.  THIS COMBINED WITH FAVORABLY VEERING LOW-LEVEL FLOW WITH
HEIGHT SUGGESTS THAT ISOLATED TORNADO POTENTIAL WILL CONTINUE FOR AT
LEAST ANOTHER HOUR OR TWO BEFORE DIURNAL EFFECTS LIKELY BEGIN TO
RESULT IN A SLOW DECREASE IN STORM INTENSITY/SEVERE WEATHER
POTENTIAL.

..GOSS.. 05/26/2012

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

ATTN...WFO...TOP...ICT...GID...DDC...GLD...

LAT...LON   38059989 38419996 39329975 39549790 38179835 38059989

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 8:43 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Edwards, Ford, Kingman and 4 more	62 min
May 25, 9:17 PM CDT	Mesoscale Discussion	SPC	Phillips, Smith	88 min
May 25, 10:44 PM CDT	Mesoscale Discussion	SPC	Barton, Ellsworth, Lincoln, Pawnee, Rush, Russell	61 min
May 26, 2:46 PM CDT	Mesoscale Discussion	SPC	Finney, Grant, Gray, Hamilton, Haskell, Kearny and 5 more	119 min

Nearby

Mesoscale Discussions in Kansas, 2012 Every 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.