Alert archive / Missouri / Tornado Watches in 2000

Tornado Watch 55

February 25, 200016 counties in Illinois; 22 counties in Missouri

The Storm Prediction Center issued this tornado watch at Feb 25, 2000, 2:15 PM CST for 16 counties in Illinois; 22 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Feb 25, 2000, 2:15 PM CST (20:15 UTC)
Expired: Feb 25, 2000, 8:00 PM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 38 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Woodford County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Cooper County, MO, Gasconade County, MO, Howard County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 119 km from the middle of the area, began a volume at 20:14 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

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

Issued	Product	Office	Counties	Lasted
Feb 25, 2:24 PM CST	Tornado Warning	SGF	Camden, Morgan	36 min
Feb 25, 2:59 PM CST	Severe Thunderstorm Warning	LSX	Moniteau	31 min
Feb 25, 3:19 PM CST	Severe Thunderstorm Warning	LSX	Boone, Cole	51 min
Feb 25, 3:31 PM CST	Tornado Warning	LSX	Boone	44 min
Feb 25, 3:49 PM CST	Tornado Warning	LSX	Audrain, Callaway	46 min
Feb 25, 4:30 PM CST	Tornado Warning	LSX	Ralls	50 min

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.3 hours before the alert went out and 289 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 926 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

082 
WWUS9 KMKC 252004
SEL5  

SEL5  
MKC WW 252004
ILZ000-MOZ000-260200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 55
STORM PREDICTION CENTER NORMAN OK
204 PM CST FRI FEB 25 2000

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

   WEST CENTRAL ILLINOIS                           
   CENTRAL AND NORTHEASTERN MISSOURI                           

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 215 PM UNTIL 800
PM CST.

TORNADOES...HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES SOUTHWEST OF JEFFERSON CITY MISSOURI TO 25
MILES WEST NORTHWEST OF PEORIA ILLINOIS.

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 54...

DISCUSSION...LINE OF THUNDERSTORMS SHOWING PERSISTENT ROTATION AS
THEY MOVE ALONG OUTFLOW BOUNDARY IN WEAKLY UNSTABLE AIR. STRONG
SHEAR INCLUDING 80 KT MID LEVEL FLOW AND 50 KT LOW LEVEL JET WILL
SUPPORT ISOLATED TORNADOES ALONG WITH DAMAGING WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 24040.


...ROGASH

404,0885 381,0913 381,0934 404,0911

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 25, 1:15 PM CST	Tornado Watch	SPC	Barry, Camden, Cedar, Christian, Dade, Dallas and 17 more	6 hr

Nearby

Tornado Watches in Missouri, 2000 Tornado Watches in Illinois, 2000 Every tornado watch in 2000

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.