Alert archive / Iowa / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 25, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 19, 1996, 12:40 AM CDT for Osceola County, Iowa; Jackson County, Minnesota. It was in force for 30 min. 2 reports 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
- May 19, 1996, 12:40 AM CDT (05:40 UTC)
- Expired
- May 19, 1996, 1:10 AM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Osceola County, IA, Jackson County, MN
The radar
The Sioux Falls radar (KFSD), 108 km from the middle of the area, began a volume at 05:42 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 |
|---|---|---|---|
| May 19, 12:55 AM CDT | Thunderstorm Wind 67 | Jackson, MN | |
| May 19, 1:00 AM CDT | Thunderstorm Wind 85 | Alpha, MN |
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
Minneapolis, MN (KMPX), launched 00:00Z, 5.7 hours before the alert went out and 205 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
- 9 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 2274 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 190541 SVRFSD IAC143-MNC063-190610- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1240 AM CDT SUN MAY 19 1996 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 110 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHWEST MINNESOTA ...JACKSON COUNTY IN NORTHWEST IOWA ...OSCEOLA COUNTY AT 1235 AM CDT...A LINE OF SEVERE THUNDERSTORMS PRODUCING DAMAGING WINDS WAS DETECTED BY SIOUX FALLS DOPPLER RADAR FROM 15 MILES NORTHEAST OF WORTHINGTON NEAR DUNDEE...TO 10 MILES SOUTHEAST OF SIBLEY NEAR MELVIN...MOVING EAST AT 50 MPH. THESE STORMS CAN BE EXPECTED IN THE VICINITY OF... SPAFFORD AROUND 1240 AM CDT OCHEYEDAN AROUND 1240 AM CDT HARRIS AROUND 1240 AM CDT OKABENA AROUND 1245 AM CDT LAKEFIELD AROUND 1250 AM CDT JACKSON AROUND 100 AM CDT BERGEN AROUND 105 AM 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. SEVERE THUNDERSTORM CAN AND OFTEN DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A TORNADO WATCH REMAINS IN EFFECT IN SOUTHERN MINNESOTA THROUGH 2AM...AND NORTHWEST IOWA THROUGH 4AM. WINDS GUSTING TO 62 MILES AN HOUR WERE OBSERVED AT WORTHINGTON AT 1216 AM CDT. CHAPMAN
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, May 18, 11:00 PM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1100 PM CDT SAT MAY 18 1996
TIME CDT .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
830 PM CHAMBERLAIN SD 1.75 INCH HAIL
5/18/96 BRULE 60 MPH WINDS
900 PM CHAMBERLAIN SD 1.00 INCH HAIL
5/18/96 BRULE
908 PM KIMBALL SD PEA/SIZE HAIL
5/18/96 BRULE
920 PM WEST OF WHITE LAKE SD 0.5 INCH HAIL
5/18/96 AURORA
930 PM NORTHEAST OF HETLAND SD 0.5 INCH HAIL
5/18/96 KINGSBURY
930 PM 3S HOWARD SD TORNADO OVERTURNED
5/18/96 MINER CARS...DOWNED LARGE
TREES...CAUSED FIRES
955 PM 1S HOWARD SD 55 MPH WINDS
5/18/96 MINER
1038 PM 4SE BROOKINGS SD TORNADO REPORTED
5/18/96 BY PUBLIC
RSRSpecial weather statement, May 19, 12:29 AM CDT, 11 minutes before
SDZ008-011-018>023-035>045>071-MNZ097-098-190700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1230 AM CDT SUN MAY 19 1996 ...TORNADO WATCHES CANCELLED FOR SOUTH DAKOTA... THE PARTS OF TORNADO WATCHES NUMBER 394 AND 396 AFFECTING SOUTH DAKOTA HAVE BEEN CANCELLED. LINGERING SHOWERS AND THUNDERSTORMS ARE NOT EXPECTED TO PRODUCE ANY MORE SEVERE WEATHER. WILLIAMS
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 11:57 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 28 min |
| May 19, 12:18 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 27 min |
| May 18, 9:31 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 29 min |
| May 18, 11:16 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray, Pipestone | 29 min |
| May 18, 11:51 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 29 min |
| May 18, 11:57 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 28 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1996Severe Thunderstorm Warnings in Minnesota, 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.