Alert archive / Kansas / Tornado Watches in 2015

Tornado Watch 102

April 24, 201542 counties in Kansas

The Storm Prediction Center issued this tornado watch at Apr 24, 2015, 3:41 PM CDT for 42 counties in Kansas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2015, 3:41 PM CDT (20:41 UTC)
Expired
Apr 24, 2015, 9:52 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 42 counties

Barber County, KS, Barton County, KS, Clay County, KS, Cloud County, KS, Decatur County, KS, Dickinson County, KS, Ellis County, KS, Ellsworth County, KS, Gove County, KS, Graham County, KS, Harper County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Lincoln County, KS, Logan County, KS, Marion County, KS, McPherson County, KS, Mitchell County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Phillips County, KS, Pratt County, KS, Rawlins County, KS, Reno County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Stafford County, KS, Sumner County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS

The radar

The Dodge City radar (KDDC), 115 km from the middle of the area, began a volume at 20:45 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 24, 3:51 PM CDTSevere Thunderstorm WarningGLDWallace39 min
Apr 24, 3:52 PM CDTSevere Thunderstorm WarningDDCEllis53 min
Apr 24, 4:16 PM CDTTornado WarningDDCEllis29 min
Apr 24, 4:28 PM CDTSevere Thunderstorm WarningGIDRooks32 min
Apr 24, 4:28 PM CDTSevere Thunderstorm WarningGLDWallace47 min
Apr 24, 4:46 PM CDTSevere Thunderstorm WarningDDCEllis44 min
Apr 24, 4:48 PM CDTTornado WarningDDCEllis27 min
Apr 24, 4:49 PM CDTSevere Thunderstorm WarningGLDWallace41 min
Apr 24, 4:55 PM CDTSevere Thunderstorm WarningGIDRooks35 min
Apr 24, 4:55 PM CDTSevere Thunderstorm WarningGIDOsborne, Rooks35 min
Apr 24, 5:03 PM CDTTornado Warning Tornado observedICTRussell57 min
Apr 24, 5:17 PM CDTSevere Thunderstorm WarningDDCEllis13 min
Apr 24, 5:25 PM CDTSevere Thunderstorm WarningGLDWallace38 min
Apr 24, 5:29 PM CDTSevere Thunderstorm WarningGIDOsborne31 min
Apr 24, 5:36 PM CDTSevere Thunderstorm WarningGIDPhillips, Rooks24 min
Apr 24, 5:38 PM CDTTornado WarningICTRussell67 min
Apr 24, 6:13 PM CDTSevere Thunderstorm WarningGLDGove62 min
Apr 24, 6:22 PM CDTSevere Thunderstorm WarningDDCEllis, Trego22 min
Apr 24, 6:25 PM CDTSevere Thunderstorm WarningICTLincoln65 min
Apr 24, 6:36 PM CDTTornado WarningICTLincoln54 min
Apr 24, 6:39 PM CDTSevere Thunderstorm WarningDDCTrego51 min
Apr 24, 6:40 PM CDTSevere Thunderstorm WarningGLDGove50 min
Apr 24, 6:42 PM CDTSevere Thunderstorm WarningICTRussell33 min
Apr 24, 7:06 PM CDTSevere Thunderstorm WarningGLDGove54 min
Apr 24, 7:21 PM CDTSevere Thunderstorm WarningDDCTrego36 min
Apr 24, 7:23 PM CDTSevere Thunderstorm WarningICTEllsworth, Lincoln, Saline52 min
Apr 24, 7:39 PM CDTSevere Thunderstorm WarningTOPOttawa51 min
Apr 24, 8:02 PM CDTSevere Thunderstorm WarningTOPClay, Washington31 min
Apr 24, 8:05 PM CDTSevere Thunderstorm WarningICTEllsworth, Saline38 min
Apr 24, 9:01 PM CDTSevere Thunderstorm WarningGLDRawlins44 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

Dodge City, (KDDC), launched 12:00Z, 8.7 hours before the alert went out and 113 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, Dodge City, at 12:00Z on 2015-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 411 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2015-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.1939587897117136Sfc1 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
411 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
608 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

940 
WWUS20 KWNS 242040
SEL2  
SPC WW 242040
KSZ000-250400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 102
NWS STORM PREDICTION CENTER NORMAN OK
340 PM CDT FRI APR 24 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  NORTHWEST AND CENTRAL KANSAS

* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 340 PM UNTIL
  1100 PM CDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
    TO 3 INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...SCATTERED SEVERE STORMS SHOULD DEVELOP FROM NORTHWEST TO
CENTRAL KANSAS THIS EVENING.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF HILL CITY
KANSAS TO 25 MILES SOUTHEAST OF MEDICINE LODGE KANSAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 99...WW 100...WW 101...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25025.


...GRAMS/MEAD

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 2:14 PM CDTMesoscale DiscussionSPCBarber, Barton, Comanche, Edwards, Ellis, Ellsworth and 21 more91 min

Nearby

Tornado Watches in Kansas, 2015Every tornado watch in 2015

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.