Alert archive / Nebraska / Tornado Watches in 1998
Tornado Watch 731
The Storm Prediction Center issued this tornado watch at Jul 6, 1998, 5:15 PM CDT for 16 counties in Iowa; 44 counties in Nebraska; Clay County, Union County, South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 1998, 5:15 PM CDT (22:15 UTC)
- Expired
- Jul 6, 1998, 11:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 62 counties
Buena Vista County, IA, Calhoun County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Monona County, IA, O'Brien County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Woodbury County, IA, Adams County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler 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, Franklin County, NE, Furnas County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE, Clay County, SD, Union County, SD
The radar
The Omaha radar (KOAX), 111 km from the middle of the area, began a volume at 22:17 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
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 5:18 PM CDT | Severe Thunderstorm Warning | GID | Buffalo, Dawson | 42 min |
| Jul 6, 5:19 PM CDT | Severe Thunderstorm Warning | OAX | Boone, Madison | 61 min |
| Jul 6, 5:19 PM CDT | Severe Thunderstorm Warning | OAX | Pierce, Wayne | 61 min |
| Jul 6, 5:24 PM CDT | Tornado Warning | FSD | Dixon | 46 min |
| Jul 6, 5:26 PM CDT | Severe Thunderstorm Warning | OAX | Stanton | 79 min |
| Jul 6, 5:33 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 32 min |
| Jul 6, 5:47 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 48 min |
| Jul 6, 5:57 PM CDT | Severe Thunderstorm Warning | GID | Phelps | 33 min |
| Jul 6, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Thurston | 67 min |
| Jul 6, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Thurston | 62 min |
| Jul 6, 6:11 PM CDT | Tornado Warning | OAX | Colfax, Platte | 64 min |
| Jul 6, 6:16 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 64 min |
| Jul 6, 6:25 PM CDT | Tornado Warning | FSD | Woodbury | 30 min |
| Jul 6, 6:34 PM CDT | Tornado Warning | OAX | Monona | 61 min |
| Jul 6, 6:37 PM CDT | Severe Thunderstorm Warning | OAX | Dodge | 63 min |
| Jul 6, 6:49 PM CDT | Tornado Warning | OAX | Harrison | 61 min |
| Jul 6, 6:53 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 32 min |
| Jul 6, 6:55 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 30 min |
| Jul 6, 6:59 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 61 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.3 hours before the alert went out and 111 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
- 1215 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 979 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -19 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 6, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | Lyon | 6 hr |
Nearby
Tornado Watches in Nebraska, 1998Tornado Watches in Iowa, 1998Tornado Watches in South Dakota, 1998Every tornado watch in 1998
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.