Alert archive / Indiana / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 757
The Storm Prediction Center issued this severe thunderstorm watch at Aug 17, 2004, 5:40 PM EST for 27 counties in Indiana; 4 counties in Michigan. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2004, 5:40 PM EST (22:40 UTC)
- Expired
- Aug 17, 2004, 10:00 PM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Adams County, IN, Allen County, IN, Benton County, IN, Carroll County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Jasper 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, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Saint Joseph County, MI
The radar
The Northern Indiana radar (KIWX), 64 km from the middle of the area, began a volume at 22:43 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 |
|---|---|---|---|---|
| Aug 17, 6:05 PM EST | Severe Thunderstorm Warning | LOT | Lake, Porter | 55 min |
| Aug 17, 6:15 PM EST | Severe Thunderstorm Warning | IWX | Saint Joseph | 60 min |
| Aug 17, 6:16 PM EST | Severe Thunderstorm Warning | IWX | Pulaski | 44 min |
| Aug 17, 6:22 PM EST | Severe Thunderstorm Warning | IWX | LaPorte | 53 min |
| Aug 17, 6:46 PM EST | Severe Thunderstorm Warning | IWX | Pulaski | 14 min |
| Aug 17, 7:06 PM EST | Severe Thunderstorm Warning | LOT | Lake | 39 min |
| Aug 17, 7:12 PM EST | Severe Thunderstorm Warning | IWX | Elkhart | 63 min |
| Aug 17, 7:16 PM EST | Severe Thunderstorm Warning | IWX | Elkhart | 59 min |
| Aug 17, 7:23 PM EST | Severe Thunderstorm Warning | LOT | Porter | 52 min |
| Aug 17, 8:35 PM EST | Severe Thunderstorm Warning | LOT | Lake | 25 min |
| Aug 17, 8:44 PM EST | Severe Thunderstorm Warning | LOT | Jasper | 61 min |
| Aug 17, 9:10 PM EST | Flash Flood Warning | LOT | Jasper | 4 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
Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 231 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
- 127 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 932 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 92 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 |
|---|---|---|---|---|
| Aug 17, 3:59 PM EST | Mesoscale Discussion | SPC | Benton, Carroll, Cass, Elkhart, Fulton, Jasper and 16 more | 61 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2004Severe Thunderstorm Watches in Michigan, 2004Every severe thunderstorm watch in 2004
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.