Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 1689

July 7, 200336 counties in Indiana; Berrien County, Michigan; 19 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2003, 9:13 PM EST for 36 counties in Indiana; Berrien County, Michigan; 19 counties in Ohio. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Jul 7, 2003, 9:13 PM EST (02:13 UTC)
Expired
Jul 7, 2003, 10:15 PM EST
In force
62 min
Issued by
the Storm Prediction Center
All 56 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Boone 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, Wayne 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, Hancock County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Mercer County, OH, Miami County, OH, Montgomery 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), 92 km from the middle of the area, began a volume at 02:14 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.2 hours before the alert went out and 193 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 2003-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2731 joules per kilogram.LCLEL10008507005003002001001 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 2003-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 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
2731 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
1.1
Supercell composite
11.1

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 7, 7:40 PM ESTSevere Thunderstorm WatchSPCJasper, Lake, Newton, Porter3 hr
Jul 7, 10:18 PM ESTMesoscale DiscussionSPCBenton, Jasper, Lake, Newton, Porter, White57 min
Jul 7, 11:00 PM ESTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 39 more5 hr
Jul 7, 11:50 PM ESTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 36 more85 min
Jul 8, 10:05 AM ESTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 43 more25 min
Jul 8, 10:25 AM ESTSevere Thunderstorm WatchSPCAdams, Allen, Cass, DeKalb, Elkhart, Fulton and 19 more6 hr
Jul 8, 12:04 PM ESTMesoscale DiscussionSPCAdams, Allen, Cass, DeKalb, Elkhart, Fulton and 19 more56 min
Jul 8, 12:25 PM ESTMesoscale DiscussionSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 42 more95 min
Jul 8, 1:25 PM ESTSevere Thunderstorm WatchSPCBartholomew, Benton, Blackford, Boone, Brown, Carroll and 54 more6 hr
Jul 8, 2:30 PM ESTMesoscale DiscussionSPCAdams, Allen, Cass, DeKalb, Elkhart, Fulton and 17 more30 min
Jul 8, 3:02 PM ESTMesoscale DiscussionSPCBartholomew, Benton, Blackford, Boone, Brown, Carroll and 54 more88 min
Jul 8, 3:20 PM ESTSevere Thunderstorm WatchSPCAdams, Allen, DeKalb, Elkhart, Fulton, Huntington and 17 more4 hr
Jul 8, 5:38 PM ESTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Benton, Blackford, Boone and 67 more37 min
Jul 8, 6:40 PM ESTSevere Thunderstorm WatchSPCBartholomew, Benton, Blackford, Boone, Brown, Carroll and 50 more5 hr
Jul 7, 11:57 PM ESTMesoscale DiscussionSPCMonroe63 min
Jul 8, 2:20 AM ESTSevere Thunderstorm WatchSPCMonroe6 hr
Jul 7, 8:30 PM ESTMesoscale DiscussionSPCAdams, Ashland, Athens, Carroll, Coshocton, Crawford and 36 more60 min
Jul 7, 8:55 PM ESTSevere Thunderstorm WatchSPCAshland, Ashtabula, Athens, Belmont, Carroll, Columbiana and 50 more3 hr
Jul 8, 1:57 AM ESTMesoscale DiscussionSPCAshland, Athens, Belmont, Carroll, Champaign, Clark and 44 more63 min
Jul 8, 5:06 AM ESTMesoscale DiscussionSPCAthens, Belmont, Carroll, Columbiana, Coshocton, Cuyahoga and 21 more114 min
Jul 8, 2:02 PM ESTMesoscale DiscussionSPCAshland, Ashtabula, Athens, Belmont, Carroll, Columbiana and 36 more28 min
Jul 8, 2:15 PM ESTSevere Thunderstorm WatchSPCAshland, Ashtabula, Athens, Belmont, Carroll, Columbiana and 35 more5 hr
Jul 8, 4:05 PM ESTMesoscale DiscussionSPCAshland, Athens, Belmont, Carroll, Columbiana, Coshocton and 34 more115 min

Nearby

Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Ohio, 2003Mesoscale Discussions in Michigan, 2003Every mesoscale discussion 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.