Alert archive / Kansas / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 342

June 2, 201237 counties in Kansas; 8 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 2, 2012, 6:31 PM CDT for 37 counties in Kansas; 8 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 2, 2012, 6:31 PM CDT (23:31 UTC)
Expired
Jun 3, 2012, 1:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
65 kt
All 45 counties

Cheyenne County, KS, Clark County, KS, Comanche County, KS, Decatur County, KS, Edwards County, KS, Ellis County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Graham County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Kiowa County, KS, Lane County, KS, Logan County, KS, Meade County, KS, Morton County, KS, Ness County, KS, Norton County, KS, Pawnee County, KS, Rawlins County, KS, Rush County, KS, Scott County, KS, Seward County, KS, Sheridan County, KS, Sherman County, KS, Stanton County, KS, Stevens County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Chase County, NE, Deuel County, NE, Dundy County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 47 km from the middle of the area, began a volume at 23:32 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 2, 6:41 PM CDTSevere Thunderstorm WarningDDCHamilton49 min
Jun 2, 6:51 PM CDTSevere Thunderstorm WarningGLDGreeley, Wallace54 min
Jun 2, 6:59 PM CDTTornado WarningGLDGreeley, Wallace27 min
Jun 2, 7:09 PM CDTSevere Thunderstorm WarningGLDSherman66 min
Jun 2, 7:35 PM CDTSevere Thunderstorm WarningGLDGreeley55 min
Jun 2, 7:41 PM CDTSevere Thunderstorm WarningGLDWallace64 min
Jun 2, 7:54 PM CDTSevere Thunderstorm WarningDDCGrant, Morton, Stanton, Stevens51 min
Jun 2, 7:54 PM CDTSevere Thunderstorm WarningGLDCheyenne51 min
Jun 2, 8:05 PM CDTSevere Thunderstorm WarningGLDCheyenne55 min
Jun 2, 8:23 PM CDTSevere Thunderstorm WarningGLDDecatur, Gove, Logan, Rawlins, Sheridan, Thomas67 min
Jun 2, 9:01 PM CDTSevere Thunderstorm WarningGLDHitchcock, Red Willow59 min
Jun 2, 9:09 PM CDTSevere Thunderstorm WarningGLDDecatur, Graham, Norton, Rawlins, Sheridan53 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.5 hours before the alert went out and 183 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2012-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2012-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1766 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

498 
WWUS20 KWNS 022334
SEL2
SPC WW 022334
KSZ000-NEZ000-030600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 342
NWS STORM PREDICTION CENTER NORMAN OK
635 PM CDT SAT JUN 2 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

       WESTERN KANSAS
       SOUTHWEST NEBRASKA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 635 PM
UNTIL 100 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH
NORTHEAST OF IMPERIAL NEBRASKA TO 40 MILES EAST OF LIBERAL
KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 340...WW 341...

DISCUSSION...TSTM COMPLEX IN ERN CO EXPECTED TO CONTINUE MAINLY EWD
THROUGH LATER THIS EVE...WITH A CONTINUED RISK MAINLY FOR DMGG WIND
GIVEN LARGE TEMP-DEW POINT SPREADS...STRENGTH/BREADTH OF EXISTING
COLD POOL...AND 30+ KT WNWLY DEEP SHEAR.  THE MOST ACTIVE PART OF
THE CONVECTIVE SYSTEM MAY TURN SOMEWHAT S OF E LATER THIS EVE AS
STORM MERGERS CONSOLIDATE OVER W CNTRL KS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 28025.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 2, 2:38 PM CDTMesoscale DiscussionSPCBaca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more97 min
Jun 2, 3:33 PM CDTSevere Thunderstorm WatchSPCArapahoe, Baca, Bent, Cheyenne, Crowley, Elbert and 12 more7 hr
Jun 2, 5:57 PM CDTMesoscale DiscussionSPCBaca, Bent, Cheyenne, Kiowa, Kit Carson, Logan and 5 more2 hr

Nearby

Severe Thunderstorm Watches in Kansas, 2012Severe Thunderstorm Watches in Nebraska, 2012Every severe thunderstorm watch 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.