Alert archive / Missouri / Tornado Watches in 2006
Tornado Watch 385
The Storm Prediction Center issued this tornado watch at May 24, 2006, 12:25 PM CDT for 5 counties in Illinois; 17 counties in Missouri. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2006, 12:25 PM CDT (17:25 UTC)
- Expired
- May 24, 2006, 7:30 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 22 counties
Adams County, IL, Brown County, IL, Calhoun County, IL, Greene County, IL, Pike County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Gasconade County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Shelby County, MO, Warren County, MO
The radar
The Pleasant Hill radar (KEAX), 148 km from the middle of the area, began a volume at 17:25 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
- 50%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 1:41 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Ralls | 49 min |
| May 24, 1:59 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 46 min |
| May 24, 2:59 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery | 46 min |
| May 24, 3:38 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey, Macoupin | 52 min |
| May 24, 3:46 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles, Warren | 44 min |
| May 24, 4:18 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey, Madison | 42 min |
| May 24, 4:22 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 38 min |
| May 24, 4:57 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway | 36 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
Topeka, KS (KTOP), launched 12:00Z, 5.4 hours before the alert went out and 261 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
- 1061 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 335 m²/s²
- 0-3 km storm-relative helicity
- 324 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 241726
SEL5
SPC WW 241726
ILZ000-MOZ000-250100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 385...RESENT
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM CDT WED MAY 24 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WEST CENTRAL ILLINOIS
CENTRAL AND NORTHEASTERN MISSOURI
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1225 PM UNTIL
800 PM CDT.
TORNADOES...HAIL TO 3 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 50 MILES WEST SOUTHWEST OF
JEFFERSON CITY MISSOURI TO 45 MILES NORTH OF QUINCY ILLINOIS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).
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...TAIL END OF SHORTWAVE TROUGH WILL CONTINUE INCREASING
THUNDERSTORMS ALONG AND AHEAD OF SURFACE TROUGH NOW MOVING INTO NWRN
MO. AIR MASS IS ALREADY VERY UNSTABLE WITH MLCAPE AROUND 2000 J/KG
AND WEAKLY CAPPED. SHEAR IS MARGINAL FOR SUPERCELLS ATTM...BUT DEEP
LAYER SHEAR SHOULD IMPROVE THROUGH THE DAY AS 40+ KT NWLY MID LEVEL
JET NOSES INTO NRN MO. LARGE HAIL...SOME OF WHICH COULD BECOME
QUITE LARGE...AND DAMAGING WINDS WILL BE PRIMARY SEVERE THREATS.
HOWEVER...LOW LEVEL SHEAR WILL ALSO SUPPORT A THREAT OF A FEW
TORNADOES WITH THE MORE PERSISTENT SUPERCELLS INTO THE EARLY
EVENING.
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 27030.
...EVANSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 11:27 AM CDT | Mesoscale Discussion | SPC | Adams, Hancock | 2 hr |
| May 24, 1:37 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside | 83 min |
| May 24, 2:23 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 37 more | 97 min |
| May 24, 2:46 PM CDT | Tornado Watch | SPC | Bond, Boone, Bureau, Carroll, Cass, Champaign and 63 more | 7 hr |
| May 24, 4:26 PM CDT | Mesoscale Discussion | SPC | Champaign, Christian, Clark, Clay, Coles, Cook and 24 more | 94 min |
| May 24, 4:42 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Iroquois, Kankakee, Will | 5 hr |
| May 24, 6:18 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more | 7 hr |
| May 24, 6:24 PM CDT | Mesoscale Discussion | SPC | McHenry | 96 min |
| May 24, 6:54 PM CDT | Severe Thunderstorm Watch | SPC | Kane, Lake, McHenry | 4 hr |
| May 23, 10:06 PM CDT | Mesoscale Discussion | SPC | Atchison | 114 min |
| May 24, 1:56 AM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Caldwell, Carroll, Cass, Clay and 15 more | 94 min |
| May 24, 1:29 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Benton, Camden, Carter, Cedar and 39 more | 2 hr |
| May 24, 5:45 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bollinger, Butler, Camden, Cape Girardeau and 36 more | 2 hr |
Nearby
Tornado Watches in Missouri, 2006Tornado Watches in Illinois, 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.