Alert archive / Nebraska / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 683
The Storm Prediction Center issued this severe thunderstorm watch at Aug 14, 1997, 8:15 PM CDT for 9 counties in Iowa; 45 counties in Nebraska; Union County, South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 14, 1997, 8:15 PM CDT (01:15 UTC)
- Expired
- Aug 15, 1997, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 55 counties
Buena Vista County, IA, Cherokee County, IA, Crawford County, IA, Harrison County, IA, Ida County, IA, Monona County, IA, Plymouth County, IA, Pottawattamie County, IA, Woodbury County, IA, Adams County, NE, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE, Union County, SD
The radar
The Omaha radar (KOAX), 90 km from the middle of the area, began a volume at 01:18 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
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 8:43 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 32 min |
| Aug 14, 8:51 PM CDT | Severe Thunderstorm Warning | OAX | Madison, Wayne | 59 min |
| Aug 14, 8:52 PM CDT | Severe Thunderstorm Warning | FSD | Dixon | 43 min |
| Aug 14, 9:06 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Stanton | 64 min |
| Aug 14, 9:06 PM CDT | Severe Thunderstorm Warning | OAX | Thurston | 64 min |
| Aug 14, 9:11 PM CDT | Severe Thunderstorm Warning | FSD | Dakota | 49 min |
| Aug 14, 9:12 PM CDT | Severe Thunderstorm Warning | OAX | Pierce | 33 min |
| Aug 14, 9:31 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 44 min |
| Aug 14, 11:00 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 35 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.3 hours before the alert went out and 90 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
- 1810 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 837 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
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 |
|---|---|---|---|---|
| Aug 15, 12:15 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Davis, Henry, Jefferson, Keokuk, Lee and 10 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Nebraska, 1997Severe Thunderstorm Watches in Iowa, 1997Severe Thunderstorm Watches in South Dakota, 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.