Alert archive / Iowa / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 600
The Storm Prediction Center issued this severe thunderstorm watch at Jul 13, 1997, 6:45 PM CDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 1997, 6:45 PM CDT (23:45 UTC)
- Expired
- Jul 13, 1997, 11:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Guthrie County, IA, Jasper County, IA, Madison County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Doniphan County, KS, Jackson County, KS, Jefferson County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Gentry County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE
The radar
The Topeka radar (KTWX), 142 km from the middle of the area, began a volume at 23:46 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 6:47 PM CDT | Tornado Warning | OAX | Mills, Montgomery | 33 min |
| Jul 13, 6:50 PM CDT | Severe Thunderstorm Warning | TOP | Clay | 60 min |
| Jul 13, 6:54 PM CDT | Severe Thunderstorm Warning | TOP | Marshall | 61 min |
| Jul 13, 7:40 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Geary, Riley | 45 min |
| Jul 13, 7:50 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Nemaha | 60 min |
| Jul 13, 8:11 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson, Geary, Riley | 64 min |
| Jul 13, 8:35 PM CDT | Severe Thunderstorm Warning | EAX | Atchison | 40 min |
| Jul 13, 8:35 PM CDT | Severe Thunderstorm Warning | EAX | Atchison | 40 min |
| Jul 13, 8:50 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Nemaha | 45 min |
| Jul 13, 9:32 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Shawnee | 48 min |
| Jul 13, 9:55 PM CDT | Severe Thunderstorm Warning | TOP | Jefferson | 45 min |
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 11.8 hours before the alert went out and 131 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
- 1724 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 17 more | 6 hr |
| Jul 12, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Cherry, Sheridan | 5 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 1997Severe Thunderstorm Watches in Kansas, 1997Severe Thunderstorm Watches in Missouri, 1997Every severe thunderstorm watch in 1997
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.