Alert archive / Nebraska / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 201
The Storm Prediction Center issued this severe thunderstorm watch at Apr 12, 1998, 3:30 PM CDT for 19 counties in Iowa; 38 counties in Nebraska; 7 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 1998, 3:30 PM CDT (20:30 UTC)
- Expired
- Apr 12, 1998, 9:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 64 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Fremont County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Mills County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux 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, Hall County, NE, Hamilton County, NE, Howard County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Otoe 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, Thurston County, NE, Washington County, NE, Wayne County, NE, York County, NE, Bon Homme County, SD, Clay County, SD, Hutchinson County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 4:10 PM CDT | Severe Thunderstorm Warning | OAX | Cedar, Pierce | 45 min |
| Apr 12, 4:47 PM CDT | Severe Thunderstorm Warning | FSD | Dixon | 33 min |
| Apr 12, 5:13 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 32 min |
| Apr 12, 5:45 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 30 min |
| Apr 12, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Dodge | 32 min |
| Apr 12, 6:11 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 44 min |
| Apr 12, 6:15 PM CDT | Severe Thunderstorm Warning | OAX | Burt, Washington | 45 min |
| Apr 12, 6:31 PM CDT | Tornado Warning | OAX | Washington | 34 min |
| Apr 12, 6:32 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson | 28 min |
| Apr 12, 6:51 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 49 min |
| Apr 12, 7:37 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 48 min |
| Apr 12, 7:47 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 33 min |
| Apr 12, 8:22 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford | 48 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.5 hours before the alert went out and 71 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1568 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 487 m²/s²
- 0-3 km storm-relative helicity
- 522 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.
Nearby
Severe Thunderstorm Watches in Nebraska, 1998Severe Thunderstorm Watches in Iowa, 1998Severe Thunderstorm Watches in South Dakota, 1998Every severe thunderstorm 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.