Alert archive / Kansas / Tornado Watches in 2007

Tornado Watch 172

April 24, 200747 counties in Kansas

The Storm Prediction Center issued this tornado watch at Apr 24, 2007, 10:48 AM CDT for 47 counties in Kansas. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2007, 10:48 AM CDT (15:48 UTC)
Expired
Apr 24, 2007, 9:00 PM CDT
In force
10 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 47 counties

Barber County, KS, Barton County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Clay County, KS, Cloud County, KS, Cowley County, KS, Decatur County, KS, Dickinson County, KS, Edwards County, KS, Elk County, KS, Ellis County, KS, Ellsworth County, KS, Geary County, KS, Graham County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Jewell County, KS, Kingman County, KS, Lincoln County, KS, Marion County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Phillips County, KS, Pratt County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Sedgwick County, KS, Sheridan County, KS, Smith County, KS, Stafford County, KS, Sumner County, KS, Trego County, KS, Washington County, KS

The radar

The Dodge City radar (KDDC), 164 km from the middle of the area, began a volume at 15:51 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
90%
One or more EF2 to EF5 tornadoes
40%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
95%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 24, 1:33 PM CDTSevere Thunderstorm WarningGIDJewell42 min
Apr 24, 3:16 PM CDTSevere Thunderstorm WarningTOPMarshall, Riley, Washington59 min
Apr 24, 5:16 PM CDTSevere Thunderstorm WarningICTEllsworth, Rice59 min
Apr 24, 5:43 PM CDTTornado WarningICTEllsworth, Rice35 min
Apr 24, 6:55 PM CDTTornado WarningICTReno, Rice50 min
Apr 24, 7:40 PM CDTTornado WarningICTRice50 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, 3.8 hours before the alert went out and 159 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 2007-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1339 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 2007-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 square meters per square second.1939587897Sfc1 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
1339 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
650 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
1.3
Supercell composite
7.8

Open this sounding in Storm Lab

The text

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

000
WWUS20 KWNS 241553
SEL2  
SPC WW 241553
KSZ000-250000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 172
NWS STORM PREDICTION CENTER NORMAN OK
1050 AM CDT TUE APR 24 2007

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

       A LARGE PART OF KANSAS

EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1050 AM UNTIL 700
PM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHEAST OF HILL
CITY KANSAS TO 45 MILES SOUTH OF WICHITA KANSAS.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU2).

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.

DISCUSSION...SFC-BASED TSTMS EXPECTED TO FORM IN THE NEXT HOUR OR
TWO ALONG MERGING PACIFIC COLD FRONT/DRY LINE NOW IN CNTRL KS. 
STORMS SHOULD QUICKLY BECOME SUPERCELLULAR...LIKELY EVOLVING INTO
SHORT NNE/SSW ORIENTED BANDS GIVEN CURRENT WIND PROFILES SHOWING
BACK-VEER PATTERNS IN THE VERTICAL.  GIVEN QUALITY OF MOISTURE
INFLOW...INCREASING SFC HEATING AND STRENGTHENING DEEP SHEAR...AN
ATTENDANT THREAT WILL EXIST FOR TORNADOES AND LARGE HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 21035.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 8:54 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Cheyenne, Clark, Comanche and 55 more2 hr
Apr 23, 9:53 PM CDTSevere Thunderstorm WatchSPCJewell, Mitchell, Osborne, Phillips, Rooks, Smith8 hr
Apr 23, 10:41 PM CDTTornado WatchSPCCheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more5 hr
Apr 24, 1:37 AM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more83 min
Apr 24, 5:03 AM CDTMesoscale DiscussionSPCGraham, Jewell, Lincoln, Mitchell, Norton, Osborne and 3 more87 min
Apr 24, 10:04 AM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 40 more116 min
Apr 24, 2:03 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 26 more87 min
Apr 24, 2:48 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Logan, Rawlins, Sheridan and 3 more117 min
Apr 24, 3:24 PM CDTTornado WatchSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 24 more5 hr
Apr 24, 3:37 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Chautauqua, Clay and 33 more83 min
Apr 24, 6:13 PM CDTMesoscale DiscussionSPCButler, Chase, Chautauqua, Clay, Cloud, Cowley and 17 more62 min

Nearby

Tornado Watches in Kansas, 2007Every tornado watch in 2007

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.