Alert archive / Indiana / Tornado Watches in 2003

Tornado Watch 932

September 26, 20034 states

The Storm Prediction Center issued this tornado watch at Sep 26, 2003, 8:20 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Sep 26, 2003, 8:20 PM CDT (01:20 UTC)
Expired
Sep 27, 2003, 2:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 100 counties

Clark County, IL, Crawford County, IL, Edwards County, IL, Lawrence County, IL, Wabash County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Dubois County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Gibson County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Ohio County, IN, Orange County, IN, Owen County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Switzerland County, IN, Union County, IN, Vanderburgh County, IN, Vigo County, IN, Warrick County, IN, Washington County, IN, Wayne County, IN, Boone County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Henderson County, KY, Kenton County, KY, Oldham County, KY, Trimble County, KY, Union County, KY, Allen County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Highland County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Pickaway County, OH, Preble County, OH, Ross County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Warren County, OH, Wyandot County, OH

The radar

The Indianapolis radar (KIND), 45 km from the middle of the area, began a volume at 01:24 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

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

IssuedProductOfficeCountiesLasted
Sep 27, 1:45 AM CDTFlash Flood WarningLMKJefferson, Oldham2 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 1.3 hours before the alert went out and 178 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, Cncnati-Daytn, OH at 00:00Z on 2003-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 780 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, Cncnati-Daytn, OH at 00:00Z on 2003-09-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 368 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
780 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
699 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
368 m²/s²
0-3 km storm-relative helicity
432 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.5

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 270121
SEL2  
SPC WW 270120
ILZ000-INZ000-KYZ000-OHZ000-LEZ000-270700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 932 CORR 1
NWS STORM PREDICTION CENTER NORMAN OK 
820 PM EST FRI SEP 26 2003

CORRECTED FOR TIME ZONE

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

  SOUTHEAST ILLINOIS    
  SOUTHERN AND CENTRAL INDIANA      
  NORTHERN KENTUCKY   
  WESTERN AND CENTRAL OHIO   
  LAKE ERIE   

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 820 PM UNTIL
200 AM EST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 40 MILES NORTHWEST OF EVANSVILLE INDIANA TO
35 MILES NORTH NORTHEAST OF COLUMBUS OHIO.

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 930. WATCH NUMBER 930 WILL NOT BE IN EFFECT AFTER 820
PM EST. CONTINUE...WW 931...WW 932...


DISCUSSION...LINE OF SEVERE/SUPERCELL STORMS...AS WELL AS ISOLATED
STORMS AHEAD OF LINE...CONTINUE TO AFFECT PARTS OF EASTERN
IL/CENTRAL IND/NORTHWEST OH.  LOW LEVEL VERTICAL SHEAR PROFILES WILL
STRENGTHEN DURING THE NEXT FEW HOURS...SUGGESTING THAT POTENTIAL FOR
ISOLATED TORNADOES WILL PERSIST.  OTHERWISE...DAMAGING WINDS WILL BE
LIKELY WITH BOW/LEWP STRUCTURES ALONG THE SQUALL LINE.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 26035.


...HART

392,0880 412,0823 392,0823 372,0880 

WWUS20 KWNS 270121
SEL2  
SPC WW 270120
ILZ000-INZ000-KYZ000-OHZ000-LEZ000-270700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 932 CORR 1
NWS STORM PREDICTION CENTER NORMAN OK 
820 PM EST FRI SEP 26 2003

CORRECTED FOR TIME ZONE

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

  SOUTHEAST ILLINOIS    
  SOUTHERN AND CENTRAL INDIANA      
  NORTHERN KENTUCKY   
  WESTERN AND CENTRAL OHIO   
  LAKE ERIE   

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 820 PM UNTIL
200 AM EST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 40 MILES NORTHWEST OF EVANSVILLE INDIANA TO
35 MILES NORTH NORTHEAST OF COLUMBUS OHIO.

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 930. WATCH NUMBER 930 WILL NOT BE IN EFFECT AFTER 820
PM EST. CONTINUE...WW 931...WW 932...


DISCUSSION...LINE OF SEVERE/SUPERCELL STORMS...AS WELL AS ISOLATED
STORMS AHEAD OF LINE...CONTINUE TO AFFECT PARTS OF EASTERN
IL/CENTRAL IND/NORTHWEST OH.  LOW LEVEL VERTICAL SHEAR PROFILES WILL
STRENGTHEN DURING THE NEXT FEW HOURS...SUGGESTING THAT POTENTIAL FOR
ISOLATED TORNADOES WILL PERSIST.  OTHERWISE...DAMAGING WINDS WILL BE
LIKELY WITH BOW/LEWP STRUCTURES ALONG THE SQUALL LINE.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 26035.


...HART

392,0880 412,0823 392,0823 372,0880

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 26, 7:56 PM CDTMesoscale DiscussionSPCLawrence, Wabash94 min
Sep 26, 9:21 PM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 12 more54 min
Sep 26, 11:06 PM CDTMesoscale DiscussionSPCClark, Crawford, Lawrence84 min
Sep 26, 11:40 PM CDTTornado WatchSPCAnderson, Bath, Boone, Bourbon, Bracken, Bullitt and 35 more5 hr
Sep 27, 2:12 AM CDTMesoscale DiscussionSPCAdair, Allen, Barren, Butler, Calloway, Casey and 21 more93 min
Sep 27, 2:37 AM CDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Bracken, Bullitt, Campbell and 36 more113 min
Sep 27, 4:15 AM CDTMesoscale DiscussionSPCBath, Bourbon, Carter, Clark, Elliott, Estill and 18 more60 min
Sep 27, 10:42 AM CDTMesoscale DiscussionSPCBell, Harlan, Knox, Leslie, Letcher108 min

Nearby

Tornado Watches in Indiana, 2003Tornado Watches in Ohio, 2003Tornado Watches in Kentucky, 2003Every tornado watch in 2003

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.