Alert archive / Iowa / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 178, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 6, 1996, 9:43 PM CDT for O'Brien County, Osceola County, Iowa. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 6, 1996, 9:43 PM CDT (02:43 UTC)
- Expired
- Aug 6, 1996, 10:15 PM CDT
- In force
- 32 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties O'Brien County, IA, Osceola County, IA
The radar
The Sioux Falls radar (KFSD), 98 km from the middle of the area, began a volume at 02:45 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 2.7 hours before the alert went out and 221 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
- 2729 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1384 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 070244 SVRFSD IAC141-143-070315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 943 PM CDT TUE AUG 6 1996 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS SD HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWEST IOWA ...NORTHERN O'BRIEN COUNTY ...OSCEOLA COUNTY AT 941 PM CDT...A LINE OF SEVERE THUNDERSTORMS WITH DAMAGING WIND WAS INDICATED BY SIOUX FALLS DOPPLER RADAR FROM NEAR SIBLEY TO 15 MILES SOUTHWEST OF SIBLEY OR NEAR RITTER MOVING EAST AT 35 MPH. THIS STORM CAN BE EXPECTED IN THE VICINITY OF... ASHTON AROUND 945 PM CDT CLOVERDALE AROUND 950 PM CDT SANBORN AROUND 955 PM CDT MELVIN AROUND 1000 PM CDT SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OFTEN DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. jCHAPMAN
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 8:57 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 33 min |
| Aug 6, 9:29 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 31 min |
| Aug 6, 10:00 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 45 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.