Alert archive / Oklahoma / Tornado Watches in 2007
Tornado Watch 243
The Storm Prediction Center issued this tornado watch at May 6, 2007, 9:19 AM CDT for 14 counties in Kansas; 43 counties in Oklahoma; 8 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 6, 2007, 9:19 AM CDT (14:19 UTC)
- Expired
- May 6, 2007, 2:01 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 65 counties
Allen County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Washington County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Vance AFB radar (KVNX), 83 km from the middle of the area, began a volume at 14:19 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 9:31 AM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey | 59 min |
| May 6, 9:59 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa | 16 min |
| May 6, 10:08 AM CDT | Severe Thunderstorm Warning | OUN | Major, Woods | 52 min |
| May 6, 10:40 AM CDT | Severe Thunderstorm Warning | ICT | Butler, Elk, Greenwood | 49 min |
| May 6, 10:53 AM CDT | Tornado Warning | ICT | Harper, Kingman, Sedgwick, Sumner | 38 min |
| May 6, 11:17 AM CDT | Flash Flood Warning | ICT | Harper, Kingman, Reno, Sedgwick, Sumner | 4 hr |
| May 6, 12:13 PM CDT | Flash Flood Warning | ICT | Harper, Kingman, Reno, Sedgwick, Sumner | 9 hr |
| May 6, 12:13 PM CDT | Flash Flood Warning | ICT | Harper, Harvey, Kingman, Reno, Sedgwick, Sumner | 9 hr |
| May 6, 1:42 PM CDT | Severe Thunderstorm Warning | OUN | Beckham | 33 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 12:00Z, 2.3 hours before the alert went out and 42 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.
- Mixed-layer CAPE
- 2828 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 674 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 2.7
- Supercell composite
- 11.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 061421
SEL3
SPC WW 061421
KSZ000-OKZ000-TXZ000-062300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 243
NWS STORM PREDICTION CENTER NORMAN OK
920 AM CDT SUN MAY 6 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF SOUTHEAST KANSAS
MUCH OF WESTERN AND NORTHERN OKLAHOMA
SMALL PART OF NORTHWEST TEXAS
EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 920 AM UNTIL 600
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 95 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST OF
CHANUTE KANSAS TO 50 MILES WEST SOUTHWEST OF WICHITA FALLS TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).
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...STRONG THUNDERSTORMS ACROSS SCENTRAL KS TO SWRN OK
CURRENTLY...WILL CONTINUE TO INTENSIFY AS THEY DEVELOP EWD INTO A
VERY UNSTABLE AND WEAKLY CAPPED AIRMASS. WITH MLCAPES TO 3000 J/KG
AND 25-30KT OF LOW LEVEL SHEAR.,.POTENTIAL FOR TORNADIC SUPERCELLS
WILL INCREASE AS THE STORMS CONTINUE EWD...PARTICULARLY BY MID
AFTERNOON.
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
550. MEAN STORM MOTION VECTOR 24025.
...HALESSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:22 PM CDT | Tornado Watch | SPC | Atchison, Doniphan | 9 hr |
| May 5, 8:18 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Butler, Chase, Coffey and 18 more | 57 min |
| May 5, 9:08 PM CDT | Tornado Watch | SPC | Anderson, Barber, Barton, Brown, Butler, Chase and 64 more | 7 hr |
| May 5, 11:24 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Cloud, Comanche, Edwards and 23 more | 66 min |
| May 6, 1:50 AM CDT | Mesoscale Discussion | SPC | Anderson, Atchison, Barber, Barton, Brown, Butler and 48 more | 85 min |
| May 6, 7:10 AM CDT | Mesoscale Discussion | SPC | Coffey, Franklin, Johnson, Wyandotte | 95 min |
| May 6, 11:41 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barber, Barton, Bourbon, Butler and 36 more | 94 min |
| May 6, 1:47 PM CDT | Mesoscale Discussion | SPC | Clark | 58 min |
| May 6, 1:59 PM CDT | Tornado Watch | SPC | Allen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 25 more | 8 hr |
| May 6, 5:38 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 28 more | 67 min |
| May 6, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Chase, Clay, Cloud, Coffey, Dickinson and 18 more | 7 hr |
| May 5, 9:16 PM CDT | Mesoscale Discussion | SPC | Atchison, Gentry, Harrison, Holt, Nodaway, Worth | 59 min |
| May 6, 4:08 AM CDT | Mesoscale Discussion | SPC | Adair, Buchanan, Caldwell, Carroll, Clay, Clinton and 18 more | 2 hr |
| May 6, 4:40 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Daviess, Grundy, Harrison, Mercer, Putnam and 2 more | 4 hr |
| May 5, 7:34 PM CDT | Mesoscale Discussion | SPC | Tillman | 56 min |
| May 5, 7:48 PM CDT | Tornado Watch | SPC | Comanche, Jackson, Tillman | 7 hr |
| May 5, 9:58 PM CDT | Tornado Watch | SPC | Alfalfa, Beaver, Beckham, Blaine, Custer, Dewey and 12 more | 7 hr |
| May 6, 3:37 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more | 53 min |
| May 6, 7:50 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Custer, Dewey, Greer, Harmon and 4 more | 85 min |
| May 6, 2:36 PM CDT | Tornado Watch | SPC | Brown, Callahan, Coke, Coleman, Concho, Crockett and 23 more | 7 hr |
Nearby
Tornado Watches in Oklahoma, 2007Tornado Watches in Kansas, 2007Tornado Watches in Texas, 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.