Alert archive / Indiana / Tornado Watches in 2003

Tornado Watch 670

July 7, 200334 counties in Indiana; Berrien County, Michigan; 19 counties in Ohio

The Storm Prediction Center issued this tornado watch at Jul 7, 2003, 5:30 PM EST for 34 counties in Indiana; Berrien County, Michigan; 19 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 7, 2003, 5:30 PM EST (22:30 UTC)
Expired
Jul 7, 2003, 11:00 PM EST
In force
6 hr
Issued by
the Storm Prediction Center
All 54 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Madison County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Randolph County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Allen County, OH, Auglaize County, OH, Champaign County, OH, Clark County, OH, Darke County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Mercer County, OH, Miami County, OH, Paulding County, OH, Putnam County, OH, Shelby County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Northern Indiana radar (KIWX), 34 km from the middle of the area, began a volume at 22:30 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.

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 12:00Z, 10.5 hours before the alert went out and 235 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 12:00Z on 2003-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 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 12:00Z on 2003-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
41 J/kg
Mixed-layer CIN
-219 J/kg
Mixed-layer LCL
1266 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 072228
SEL0  
SPC WW 072230
INZ000-OHZ000-LMZ000-080400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 670 
NWS STORM PREDICTION CENTER NORMAN OK 
530 PM EST MON JUL 7 2003

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

       NORTHERN AND CENTRAL INDIANA
       WESTERN OHIO
       LAKE MICHIGAN

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 530 PM UNTIL 1100
PM EST.

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 ALONG AND 65 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 45 MILES NORTH OF LAFAYETTE INDIANA TO 30
MILES SOUTH SOUTHEAST OF FINDLAY 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...CONTINUE...WW 667...WW 668...WW 669...


DISCUSSION...THUNDERSTORMS/SUPERCELLS EXPECTED TO DEVELOP INVOF
DIFFUSE OUTFLOW BOUNDARIES ORIENTED NW/SE ACROSS CNTRL AND NRN IND. 
IF SUSTAINED STORMS DO INDEED FORM...MODERATE /40 KT/ DEEP
SHEAR...STRONG DEGREE OF UPSTREAM INSTABILITY /MEAN MIXED CAPE AOA
3500 J/KG/ AND HIGH SURFACE DEWPOINTS SUGGEST THREAT FOR A TORNADO
OR TWO IN ADDITION TO LARGE HAIL AND EVENTUAL BOWING STRUCTURES WITH
HIGH WIND.

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 600.
MEAN STORM MOTION VECTOR 29030.


...CORFIDI

420,0865 413,0832 394,0832 400,0865 

WWUS20 KWNS 072228
SEL0  
SPC WW 072230
INZ000-OHZ000-LMZ000-080400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 670 
NWS STORM PREDICTION CENTER NORMAN OK 
530 PM EST MON JUL 7 2003

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

       NORTHERN AND CENTRAL INDIANA
       WESTERN OHIO
       LAKE MICHIGAN

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 530 PM UNTIL 1100
PM EST.

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 ALONG AND 65 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 45 MILES NORTH OF LAFAYETTE INDIANA TO 30
MILES SOUTH SOUTHEAST OF FINDLAY 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...CONTINUE...WW 667...WW 668...WW 669...


DISCUSSION...THUNDERSTORMS/SUPERCELLS EXPECTED TO DEVELOP INVOF
DIFFUSE OUTFLOW BOUNDARIES ORIENTED NW/SE ACROSS CNTRL AND NRN IND. 
IF SUSTAINED STORMS DO INDEED FORM...MODERATE /40 KT/ DEEP
SHEAR...STRONG DEGREE OF UPSTREAM INSTABILITY /MEAN MIXED CAPE AOA
3500 J/KG/ AND HIGH SURFACE DEWPOINTS SUGGEST THREAT FOR A TORNADO
OR TWO IN ADDITION TO LARGE HAIL AND EVENTUAL BOWING STRUCTURES WITH
HIGH WIND.

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 600.
MEAN STORM MOTION VECTOR 29030.


...CORFIDI

420,0865 413,0832 394,0832 400,0865

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 8:46 PM ESTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Carroll, Cass and 32 more59 min
Jul 6, 11:10 PM ESTSevere Thunderstorm WatchSPCBartholomew, Boone, Brown, Clinton, Dearborn, Decatur and 21 more3 hr
Jul 6, 11:51 PM ESTMesoscale DiscussionSPCBartholomew, Boone, Brown, Clinton, Dearborn, Decatur and 21 more114 min
Jul 7, 8:30 AM ESTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 39 more60 min
Jul 7, 8:45 AM ESTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Blackford, Carroll, Cass and 29 more4 hr
Jul 7, 10:14 AM ESTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 45 more61 min
Jul 7, 11:30 AM ESTSevere Thunderstorm WatchSPCFayette, Henry, Jay, Randolph, Rush, Union and 1 more6 hr
Jul 7, 12:14 PM ESTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 42 more61 min
Jul 7, 4:34 PM ESTMesoscale DiscussionSPCAllen, Benton, Blackford, Boone, Carroll, Cass and 44 more56 min
Jul 7, 12:54 PM ESTMesoscale DiscussionSPCDickinson, Iron66 min
Jul 7, 2:35 PM ESTMesoscale DiscussionSPCDelta, Dickinson, Marquette, Menominee115 min
Jul 7, 4:42 PM ESTMesoscale DiscussionSPCChippewa, Luce, Mackinac, Schoolcraft3 hr
Jul 7, 1:56 PM ESTMesoscale DiscussionSPCAshland, Belmont, Carroll, Champaign, Clark, Columbiana and 42 more94 min
Jul 7, 2:10 PM ESTSevere Thunderstorm WatchSPCAthens, Belmont, Carroll, Columbiana, Guernsey, Harrison and 12 more6 hr
Jul 7, 5:52 PM ESTMesoscale DiscussionSPCAthens, Belmont, Carroll, Columbiana, Gallia, Geauga and 15 more53 min

Nearby

Tornado Watches in Indiana, 2003Tornado Watches in Ohio, 2003Tornado Watches in Michigan, 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.