Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 55, NWS Sioux Falls, SD

June 19, 1996Rock County, Minnesota; Lyon County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 19, 1996, 6:37 PM CDT for Rock County, Minnesota; Lyon County, Iowa. It was in force for 33 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: Jun 19, 1996, 6:37 PM CDT (23:37 UTC)
Expired: Jun 19, 1996, 7:10 PM CDT
In force: 33 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Lyon County, IA, Rock County, MN

The radar

The Sioux Falls radar (KFSD), 41 km from the middle of the area, began a volume at 23:39 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 19, 6:57 PM CDT	Hail 2.5	Little Rock, IA
Jun 19, 7:06 PM CDT	Hail 1	Little Rock, 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 nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.6 hours before the alert went out and 231 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 32 J/kg
Mixed-layer CIN: -542 J/kg
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFSD 192338
SVRFSD
IAC119-MNC133-200010-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
637 PM CDT WED JUN 19 1996

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS SD HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 710 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWEST MINNESOTA

   ...SOUTHEASTERN ROCK COUNTY

IN NORTHWEST IOWA

   ...NORTHEASTERN LYON COUNTY
 
AT 634 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY SIOUX FALLS
DOPPLER RADAR 21 MILES NORTHWEST OF SIBLEY  OR NEAR ASH CREEK
MOVING EAST SOUTHEAST AT 30 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
KANARANZI                AROUND 640 PM CDT
ROCK RAPIDS              AROUDN 645 PM CDT
LITTLE ROCK              AROUND 700 PM CDT

 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG...REINFORCED BUILDING.  DAMAGING WIND...LARGE HAIL...VERY
HEAVY RAIN AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE
THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS
PASSED.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OFTEN DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. A TORNADO WATCH REMAINS IN EFFECT
UNTIL 10PM 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

Special weather statement, Jun 19, 5:57 PM CDT, 40 minutes before

SDZ039-040-053>056-059>062-063>071-192350-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
600 PM CDT WED JUN 19 1996

...SEVERE THUNDERSTORM WATCH 640 CANCELED...

THE SEVERE THUNDERSTORM WATCH FOR A LARGE PART OF EAST CENTRAL AND
SOUTHEAST SOUTH DAKOTA HAS BEEN CANCELED AT 6 PM CDT. ALL SEVERE
WEATHER HAS MOVED TO THE EAST OF SOUTH DAKOTA BUT A FEW THUNDERSTORMS
MAY STILL LINGER UNTIL ABOUT 7 PM.

KOSCIELSKI

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 3:49 PM CDT	Tornado Warning	FSD	Pipestone	46 min
Jun 19, 4:30 PM CDT	Tornado Warning	FSD	Nobles, Rock	30 min
Jun 19, 5:05 PM CDT	Severe Thunderstorm Warning	FSD	Nobles, Rock	30 min
Jun 19, 5:36 PM CDT	Severe Thunderstorm Warning	FSD	Nobles	34 min
Jun 19, 6:00 PM CDT	Severe Thunderstorm Warning	FSD	Rock	35 min
Jun 19, 6:22 PM CDT	Tornado Warning	FSD	Osceola	33 min
Jun 19, 6:31 PM CDT	Severe Thunderstorm Warning	FSD	Dickinson	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996 Severe Thunderstorm Warnings in Iowa, 1996 Every 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.