Alert archive / South Dakota / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 92, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 20, 1996, 8:57 PM CDT for Union County, South Dakota; Dixon County, Nebraska. It was in force for 33 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
- Jun 20, 1996, 8:57 PM CDT (01:57 UTC)
- Expired
- Jun 20, 1996, 9:30 PM CDT
- In force
- 33 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Dixon County, NE, Union County, SD
The radar
The Sioux Falls radar (KFSD), 103 km from the middle of the area, began a volume at 02:01 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 |
|---|---|---|---|
| Jun 20, 9:05 PM CDT | Hail 1.75 | Newcastle, NE |
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 nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.0 hours before the alert went out and 153 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
- 2363 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1424 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 19.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 210157 SVRFSD NEC051-SDC127-210230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 857 PM CDT THU JUN 20 1996 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS SD HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST SOUTH DAKOTA ...SOUTHERN UNION COUNTY IN NORTHEAST NEBRASKA ...NORTHERN DIXON COUNTY AT 855 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY SIOUX FALLS DOPPLER RADAR 25 MILES WEST OF SIOUX CITY OR 8 MILES WEST OF PONCA MOVING EAST AT 30 MPH. THIS STORM CAN BE EXPECTED IN THE VICINITY OF... PONCA AROUND 910 PM CDT ELK POINT AROUND 920 PM CDT SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. HEITKAMP
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:08 PM CDT | Severe Thunderstorm Warning | FSD | Miner, Sanborn | 32 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1996Severe Thunderstorm Warnings in Nebraska, 1996Every severe thunderstorm warning in 1996
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.