Alert archive / Illinois / Tornado Watches in 2002

Tornado Watch 195

May 1, 20024 states

The Storm Prediction Center issued this tornado watch at May 1, 2002, 2:30 PM CDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
May 1, 2002, 2:30 PM CDT (19:30 UTC)
Expired
May 1, 2002, 6:00 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 80 counties

Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Marion County, IL, Menard County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pope County, IL, Randolph County, IL, Richland County, IL, Saline County, IL, Sangamon County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Clay County, IN, Daviess County, IN, Dubois County, IN, Fountain County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Martin County, IN, Montgomery County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, Warrick County, IN, Butler County, KY, Crittenden County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Union County, KY, Webster County, KY, Cape Girardeau County, MO, Perry County, MO

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 1, 2:37 PM CDTTornado WarningILXRichland38 min
May 1, 2:42 PM CDTSevere Thunderstorm WarningILXSangamon48 min
May 1, 2:44 PM CDTTornado WarningPAHWayne46 min
May 1, 2:54 PM CDTTornado WarningLSXMacoupin, Montgomery21 min
May 1, 3:05 PM CDTTornado WarningILXLawrence40 min
May 1, 3:05 PM CDTTornado WarningPAHEdwards, Wabash40 min
May 1, 3:10 PM CDTTornado WarningILXChristian50 min
May 1, 3:17 PM CDTTornado WarningINDKnox28 min
May 1, 3:18 PM CDTSevere Thunderstorm WarningILXRichland42 min
May 1, 3:23 PM CDTTornado WarningPAHGibson52 min
May 1, 3:36 PM CDTTornado WarningILXShelby54 min
May 1, 3:43 PM CDTTornado WarningPAHWabash17 min
May 1, 3:45 PM CDTTornado WarningPAHPike60 min
May 1, 3:47 PM CDTSevere Thunderstorm WarningINDDaviess, Knox28 min
May 1, 4:00 PM CDTFlash Flood WarningILXShelby6 hr
May 1, 4:00 PM CDTSevere Thunderstorm WarningLMKDubois45 min
May 1, 4:20 PM CDTTornado WarningLMKDubois30 min
May 1, 4:21 PM CDTTornado WarningILXCumberland54 min
May 1, 4:32 PM CDTTornado WarningLMKPerry43 min
May 1, 4:34 PM CDTSevere Thunderstorm WarningPAHSpencer26 min
May 1, 5:04 PM CDTSevere Thunderstorm WarningILXCrawford56 min
May 1, 5:21 PM CDTSevere Thunderstorm WarningINDSullivan24 min
May 1, 5:35 PM CDTFlash Flood WarningINDGreene, Sullivan55 min
May 1, 5:36 PM CDTFlash Flood WarningINDGreene, Sullivan114 min
May 1, 5:36 PM CDTSevere Thunderstorm WarningINDGreene24 min
May 1, 5:51 PM CDTSevere Thunderstorm WarningINDDaviess, Knox, Martin24 min
May 1, 5:57 PM CDTSevere Thunderstorm WarningINDGreene, Lawrence33 min

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.5 hours before the alert went out and 111 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, Lincoln, IL at 12:00Z on 2002-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Lincoln, IL at 12:00Z on 2002-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1126 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
327 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.

000 
WWUS20 KWNS 011920
SEL5  
SPC WW 011914
ILZ000-INZ000-KYZ000-012300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 195
STORM PREDICTION CENTER NORMAN OK
214 PM CDT WED MAY 1 2002

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

   CENTRAL AND SOUTHERN ILLINOIS                           
   SOUTHWEST AND WEST CENTRAL INDIANA                            
   NORTHWEST KENTUCKY                           

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
600 PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 110 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 25 MILES NORTH OF SCOTT AFB BELLEVILLE
ILLINOIS TO 30 MILES SOUTH OF BLOOMINGTON INDIANA.

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 194...

DISCUSSION...TORNADO WATCH 195 WILL SUPERSEDE COUNTIES IN WW 194. 
ONGOING SUPERCELLS ARE OR ARE NEARLY SURFACE-BASED ATTM...AND
STRONG SURFACE PRESSURE FALLS COMBINED WITH VERY STRONG LOW LEVEL
SHEAR WILL INCREASE THE THREAT OF TORNADOES IN ADDITION TO VERY
LARGE HAIL.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 28035.


...EVANS

370,0863 371,0895 402,0895 401,0863

WWUS20 KWNS 011920
SEL5  
SPC WW 011914
ILZ000-INZ000-KYZ000-012300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 195
STORM PREDICTION CENTER NORMAN OK
214 PM CDT WED MAY 1 2002

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

   CENTRAL AND SOUTHERN ILLINOIS                           
   SOUTHWEST AND WEST CENTRAL INDIANA                            
   NORTHWEST KENTUCKY                           

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
600 PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 110 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 25 MILES NORTH OF SCOTT AFB BELLEVILLE
ILLINOIS TO 30 MILES SOUTH OF BLOOMINGTON INDIANA.

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 194...

DISCUSSION...TORNADO WATCH 195 WILL SUPERSEDE COUNTIES IN WW 194. 
ONGOING SUPERCELLS ARE OR ARE NEARLY SURFACE-BASED ATTM...AND
STRONG SURFACE PRESSURE FALLS COMBINED WITH VERY STRONG LOW LEVEL
SHEAR WILL INCREASE THE THREAT OF TORNADOES IN ADDITION TO VERY
LARGE HAIL.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 28035.


...EVANS

370,0863 371,0895 402,0895 401,0863

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 1, 9:45 AM CDTSevere Thunderstorm WatchSPCAlexander, Franklin, Jackson, Johnson, Massac, Perry and 6 more6 hr
May 1, 12:45 PM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Champaign and 50 more5 hr
May 1, 3:45 PM CDTTornado WatchSPCBartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 20 more5 hr

Nearby

Tornado Watches in Illinois, 2002Tornado Watches in Indiana, 2002Tornado Watches in Kentucky, 2002Every tornado watch in 2002

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.