Alert archive / Oklahoma / Tornado Watches in 2006

Tornado Watch 124

April 1, 200612 counties in Kansas; 31 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Apr 1, 2006, 6:24 PM CST for 12 counties in Kansas; 31 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 1, 2006, 6:24 PM CST (00:24 UTC)
Expired
Apr 2, 2006, 12:23 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 43 counties

Butler County, KS, Chase County, KS, Cowley County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Marion County, KS, McPherson County, KS, Reno County, KS, Saline County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK

The radar

The Vance AFB radar (KVNX), 29 km from the middle of the area, began a volume at 00:24 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 1, 6:55 PM CSTSevere Thunderstorm WarningOUNComanche, Greer, Harmon, Jackson, Kiowa, Tillman50 min
Apr 1, 8:09 PM CSTSevere Thunderstorm WarningOUNComanche, Kiowa51 min
Apr 1, 8:23 PM CSTTornado WarningICTKingman37 min
Apr 1, 8:40 PM CSTSevere Thunderstorm WarningOUNCaddo35 min
Apr 1, 8:42 PM CSTSevere Thunderstorm WarningICTReno48 min
Apr 1, 8:53 PM CSTSevere Thunderstorm WarningOUNCanadian52 min
Apr 1, 8:54 PM CSTSevere Thunderstorm WarningOUNComanche51 min
Apr 1, 8:56 PM CSTSevere Thunderstorm WarningOUNGrady49 min
Apr 1, 9:13 PM CSTSevere Thunderstorm WarningOUNOklahoma47 min
Apr 1, 9:28 PM CSTTornado WarningICTReno35 min
Apr 1, 9:30 PM CSTSevere Thunderstorm WarningOUNMcClain45 min
Apr 1, 9:40 PM CSTSevere Thunderstorm WarningOUNCleveland50 min
Apr 1, 10:14 PM CSTSevere Thunderstorm WarningICTCowley61 min
Apr 1, 10:29 PM CSTSevere Thunderstorm WarningICTButler39 min
Apr 1, 10:29 PM CSTSevere Thunderstorm WarningTSAOsage, Pawnee61 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

Lamont, OK (KLMN), launched 00:00Z, 0.4 hours before the alert went out and 44 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, Lamont, OK at 00:00Z on 2006-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1075 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, Lamont, OK at 00:00Z on 2006-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.19395878Sfc1 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
1075 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1405 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 020023
SEL4  
SPC WW 020023
KSZ000-OKZ000-020800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 124
NWS STORM PREDICTION CENTER NORMAN OK
625 PM CST SAT APR 1 2006

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

       SOUTH CENTRAL KANSAS
       CENTRAL OKLAHOMA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 625 PM UNTIL
200 AM CST.

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 65 STATUTE MILES
EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF
HUTCHINSON KANSAS TO 40 MILES EAST OF WICHITA FALLS TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

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 121...WW 122...WW 123...

DISCUSSION...CLUSTERS OF SUPERCELL THUNDERSTORMS OVER WESTERN OK
WILL SPREAD EASTWARD ACROSS CENTRAL OK AND SOUTH CENTRAL KS DURING
THE NEXT SEVERAL HOURS.  LOW LEVEL WIND FIELDS ARE EXPECTED TO
STRENGTHEN SIGNIFICANTLY...ALONG WITH SLOWLY INCREASING MOISTURE. 
THUS...POTENTIAL FOR VERY LARGE HAIL...DAMAGING WINDS...AND ISOLATED
TORNADOES WILL CONTINUE.

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 24035.


...HART

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 1, 7:38 PM CSTMesoscale DiscussionSPCClay, Dickinson, Geary, Marshall, Morris, Nemaha and 7 more97 min
Apr 1, 7:52 PM CSTSevere Thunderstorm WatchSPCClay, Cloud, Dickinson, Geary, Marshall, Morris and 6 more4 hr
Apr 1, 10:35 PM CSTSevere Thunderstorm WatchSPCAllen, Chautauqua, Elk, Greenwood, Labette, Montgomery and 3 more2 hr
Apr 1, 11:36 PM CSTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford4 hr
Apr 2, 12:44 AM CSTMesoscale DiscussionSPCBourbon, Johnson, Leavenworth, Linn, Miami, Wyandotte2 hr
Apr 2, 9:41 AM CDTMesoscale DiscussionSPCAnderson, Atchison, Bourbon, Brown, Clay, Cloud and 18 more2 hr
Apr 2, 1:13 PM CDTSevere Thunderstorm WatchSPCAtchison, Doniphan, Leavenworth, Wyandotte4 hr
Apr 1, 6:30 PM CSTMesoscale DiscussionSPCAdair90 min
Apr 1, 8:17 PM CSTMesoscale DiscussionSPCCanadian, Cleveland, Comanche, Cotton, Garfield, Garvin and 12 more88 min
Apr 1, 7:53 PM CSTMesoscale DiscussionSPCConcho, Crockett, Irion, Runnels, Schleicher, Tom Green97 min
Apr 2, 11:03 AM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Burnet, Camp, Cherokee and 31 more117 min
Apr 2, 11:34 AM CDTSevere Thunderstorm WatchSPCAnderson, Angelina, Bell, Camp, Cass, Cherokee and 27 more6 hr
Apr 2, 5:02 PM CDTMesoscale DiscussionSPCAnderson, Cherokee, Falls, Freestone, Gregg, Harrison and 11 more88 min

Nearby

Tornado Watches in Oklahoma, 2006Tornado Watches in Kansas, 2006Every tornado watch in 2006

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.