Alert archive / Indiana / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 807
The Storm Prediction Center issued this severe thunderstorm watch at Jul 27, 2003, 11:30 AM CDT for 16 counties in Illinois; 35 counties in Indiana; Berrien County, Michigan. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2003, 11:30 AM CDT (16:30 UTC)
- Expired
- Jul 27, 2003, 5:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Bureau County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, McLean County, IL, Putnam County, IL, Tazewell County, IL, Will County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI
The radar
The Chicago radar (KLOT), 49 km from the middle of the area, began a volume at 16:33 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 27, 11:33 AM CDT | Severe Thunderstorm Warning | DVN | Bureau | 42 min |
| Jul 27, 11:36 AM CDT | Severe Thunderstorm Warning | LOT | Lee | 39 min |
| Jul 27, 12:01 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 44 min |
| Jul 27, 12:14 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee | 46 min |
| Jul 27, 12:20 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 25 min |
| Jul 27, 12:32 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall | 43 min |
| Jul 27, 12:43 PM CDT | Flash Flood Warning | LOT | Cook, Will | 3 hr |
| Jul 27, 12:51 PM CDT | Severe Thunderstorm Warning | LOT | Will | 54 min |
| Jul 27, 1:00 PM CDT | Flash Flood Warning | LOT | Lake, Porter | 3 hr |
| Jul 27, 1:17 PM CDT | Flash Flood Warning | LOT | DeKalb, Kendall, LaSalle | 3 hr |
| Jul 27, 1:31 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee | 44 min |
| Jul 27, 1:53 PM CDT | Severe Thunderstorm Warning | LOT | Benton, Jasper | 37 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 4.5 hours before the alert went out and 139 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
- 868 J/kg
- Mixed-layer CIN
- -250 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 10:44 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 19 more | 91 min |
| Jul 27, 2:29 PM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 7 more | 91 min |
| Jul 26, 7:46 PM CDT | Mesoscale Discussion | SPC | Baraga, Delta, Dickinson, Gogebic, Houghton, Iron and 3 more | 89 min |
| Jul 26, 9:07 PM CDT | Mesoscale Discussion | SPC | Alger, Baraga, Delta, Dickinson, Iron, Marquette | 53 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2003Severe Thunderstorm Watches in Illinois, 2003Severe Thunderstorm Watches in Michigan, 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.