Alert archive / Nebraska / Tornado Warnings in 1998
Tornado Warning 48, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jul 6, 1998, 6:25 PM CDT for Dakota County, Nebraska; Woodbury County, Iowa. It was in force for 30 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 6, 1998, 6:25 PM CDT (23:25 UTC)
- Expired
- Jul 6, 1998, 6:55 PM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Woodbury County, IA, Dakota County, NE
The radar
The Omaha radar (KOAX), 119 km from the middle of the area, began a volume at 23:25 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 6:25 PM CDT | Thunderstorm Wind 61 | Sloan, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 6, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 6, 5:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.4 hours before the alert went out and 119 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
As transmitted, in the capitals the NWS used until 2016.
908 WFUS1 KFSD 062326 RRA TORFSD IAC193-NEC043-062355- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 625 PM CDT MON JUL 6 1998 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * TORNADO WARNING FOR... SOUTHWESTERN WOODBURY COUNTY IN NORTHWESTERN IOWA SOUTHEASTERN DAKOTA COUNTY IN NORTHEASTERN NEBRASKA * UNTIL 655 PM CDT * AT 622 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 11 MILES SOUTHWEST OF SIOUX CITY OR 7 MILES WEST OF SALIX MOVING EAST AT 40 MPH. * THE TORNADO IS EXPECTED TO BE NEAR... SALIX AROUND 630 PM CDT LUTON AROUND 640 PM CDT HORNICK AROUND 645 PM CDT CLIMBING HILL AROUND 650 PM CDT DO NOT USE YOUR CAR TO OUTRUN A TORNADO. CARS ARE EASILY TOSSED AROUND BY TORNADIC WINDS. IF YOU ARE CAUGHT IN THE PATH OF A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT. RUBY
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 5:24 PM CDT | Tornado Warning | FSD | Dixon | 46 min |
| Jul 6, 5:47 PM CDT | Severe Thunderstorm Warning | FSD | Dakota | 48 min |
| Jul 6, 6:55 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 30 min |
Nearby
Tornado Warnings in Nebraska, 1998Tornado Warnings in Iowa, 1998Every tornado warning in 1998Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.