Alert archive / Indiana / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 782
The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2003, 11:45 PM EST for 17 counties in Indiana; 16 counties in Michigan; 4 counties in Ohio. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2003, 11:45 PM EST (04:45 UTC)
- Expired
- Jul 21, 2003, 5:00 AM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Allen County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Saint Joseph County, MI, Van Buren County, MI, Defiance County, OH, Paulding County, OH, Van Wert County, OH, Williams County, OH
The radar
The Grand Rapids radar (KGRR), 84 km from the middle of the area, began a volume at 04:48 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 11:48 PM EST | Severe Thunderstorm Warning | IWX | Elkhart | 57 min |
| Jul 20, 11:58 PM EST | Severe Thunderstorm Warning | IWX | Kosciusko, Noble | 47 min |
| Jul 21, 12:18 AM EST | Severe Thunderstorm Warning | GRR | Barry, Eaton | 57 min |
| Jul 21, 12:38 AM EST | Severe Thunderstorm Warning | IWX | Allen, DeKalb, Whitley | 67 min |
| Jul 21, 12:50 AM EST | Severe Thunderstorm Warning | GRR | Jackson | 25 min |
| Jul 21, 1:14 AM EST | Severe Thunderstorm Warning | IWX | Fulton | 31 min |
| Jul 21, 1:30 AM EST | Severe Thunderstorm Warning | IWX | Kosciusko | 45 min |
| Jul 21, 1:36 AM EST | Severe Thunderstorm Warning | GRR | Ingham, Jackson | 54 min |
| Jul 21, 1:38 AM EST | Severe Thunderstorm Warning | IWX | Pulaski, Starke | 52 min |
| Jul 21, 2:45 AM EST | Flash Flood Warning | LOT | Jasper, Lake, Newton, Porter | 3 hr |
| Jul 21, 3:39 AM EST | Severe Thunderstorm Warning | IWX | Wabash | 51 min |
| Jul 21, 4:30 AM EST | Flash Flood Warning | IWX | Allen | 3 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
Detroit, MI (KDTX), launched 00:00Z, 4.8 hours before the alert went out and 177 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.
- Mixed-layer CAPE
- 1227 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 788 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 9:39 PM EST | Mesoscale Discussion | SPC | Elkhart, Kosciusko, LaGrange, LaPorte, Marshall, Noble and 3 more | 66 min |
| Jul 20, 9:48 PM EST | Mesoscale Discussion | SPC | Lake, Newton | 117 min |
| Jul 20, 10:15 PM EST | Severe Thunderstorm Watch | SPC | Lake, Porter | 7 hr |
| Jul 21, 1:56 AM EST | Mesoscale Discussion | SPC | Bartholomew, Benton, Boone, Brown, Clay, Clinton and 20 more | 2 hr |
| Jul 21, 3:15 AM EST | Severe Thunderstorm Watch | SPC | Adams, Allen, Benton, Blackford, Boone, Carroll and 47 more | 6 hr |
| Jul 21, 4:12 AM EST | Mesoscale Discussion | SPC | Gibson, Knox, Posey, Sullivan, Vanderburgh | 2 hr |
| Jul 21, 5:03 AM EST | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 17 more | 117 min |
| Jul 21, 5:10 AM EST | Severe Thunderstorm Watch | SPC | Dearborn, Decatur, Fayette, Franklin, Jay, Jefferson and 9 more | 6 hr |
| Jul 21, 10:27 AM EST | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 29 more | 2 hr |
| Jul 21, 3:26 PM EST | Mesoscale Discussion | SPC | Allen, DeKalb, Elkhart, Fulton, Jasper, Kosciusko and 12 more | 94 min |
| Jul 21, 9:59 AM EST | Mesoscale Discussion | SPC | Allegan, Barry, Bay, Clare, Clinton, Eaton and 21 more | 2 hr |
| Jul 21, 1:11 AM EST | Mesoscale Discussion | SPC | Allen, Ashland, Crawford, Cuyahoga, Erie, Geauga and 24 more | 2 hr |
| Jul 21, 6:39 AM EST | Mesoscale Discussion | SPC | Adams, Athens, Brown, Carroll, Coshocton, Delaware and 29 more | 96 min |
| Jul 21, 7:40 AM EST | Severe Thunderstorm Watch | SPC | Athens, Belmont, Carroll, Columbiana, Gallia, Guernsey and 17 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Indiana, 2003Severe Thunderstorm Watches in Michigan, 2003Severe Thunderstorm Watches in Ohio, 2003Every severe thunderstorm 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.