Alert archive / Iowa / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 59, NWS Sioux Falls, SD

June 19, 1996Sioux County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 19, 1996, 8:16 PM CDT for Sioux County, Iowa. It was in force for 44 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 19, 1996, 8:16 PM CDT (01:16 UTC)
Expired
Jun 19, 1996, 9:00 PM CDT
In force
44 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Sioux County, IA

The radar

The Sioux Falls radar (KFSD), 72 km from the middle of the area, began a volume at 01:19 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

TimeReportWhereRemark
Jun 19, 8:25 PM CDTHail 2.5Sioux Center, 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

Omaha, NE (KOAX), launched 00:00Z, 1.3 hours before the alert went out and 197 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 1996-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3601 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 1996-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3601 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1562 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
1.4
Supercell composite
19.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 200117
SVRFSD
IAC167-200200-

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS SD HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 900 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWEST IOWA

   ...SIOUX COUNTY
 
AT 812 PM CDT...A SEVERE THUNDERSTORM WAS INDICATED BY SIOUX FALLS
DOPPLER RADAR 34 MILES SOUTHWEST OF SIBLEY  OR IN THE VICINITY OF
ROCK VALLEY AND LEBANON MOVING EAST AT 30 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
CARMEL                   AROUND 820 PM CDT
PERKINS                  AROUND 820 PM CDT
SIOUX CENTER             AROUND 820 PM CDT
HULL                     AROUND 825 PM CDT
ORANGE CITY              AROUND 830 PM CDT
ALTON                    AROUND 840 PM CDT
BOYDEN                   AROUND 840 PM CDT
NEWKIRK                  AROUND 845 PM CDT
GRANVILLE                AROUND 850 PM CDT
MATLOCK                  AROUND 850 PM CDT
HOSPERS                  AROUND 855 PM CDT

THIS WARNING EXTENDS THE PREVIOUS WARNING IN EFFECT FOR NORTHERN
SIOUX COUNTY UNTIL 815 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.

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, 2 hours 19 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.

IssuedProductOfficeCountiesLasted
Jun 19, 7:05 PM CDTSevere Thunderstorm WarningFSDOsceola45 min
Jun 19, 7:44 PM CDTSevere Thunderstorm WarningFSDSioux31 min
Jun 19, 9:00 PM CDTSevere Thunderstorm WarningFSDO'Brien, Sioux35 min
Jun 19, 9:18 PM CDTSevere Thunderstorm WarningFSDPlymouth32 min
Jun 19, 9:26 PM CDTSevere Thunderstorm WarningFSDCherokee44 min
Jun 19, 9:49 PM CDTSevere Thunderstorm WarningFSDWoodbury31 min
Jun 19, 9:50 PM CDTSevere Thunderstorm WarningFSDPlymouth35 min
Jun 19, 10:09 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida31 min
Jun 19, 10:22 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury33 min
Jun 19, 10:54 PM CDTSevere Thunderstorm WarningFSDIda31 min
Jun 19, 11:19 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury31 min
Jun 19, 11:50 PM CDTSevere Thunderstorm WarningFSDPlymouth30 min
Jun 20, 12:04 AM CDTSevere Thunderstorm WarningFSDWoodbury46 min
Jun 20, 12:20 AM CDTSevere Thunderstorm WarningFSDPlymouth15 min
Jun 20, 12:52 AM CDTSevere Thunderstorm WarningFSDWoodbury23 min
Jun 20, 1:26 AM CDTFlash Flood WarningFSDIda3 hr
Jun 20, 8:32 AM CDTFlash Flood WarningFSDIda5 hr
Jun 20, 2:13 PM CDTSevere Thunderstorm WarningFSDWoodbury32 min
Jun 20, 2:24 PM CDTSevere Thunderstorm WarningFSDDickinson46 min
Jun 20, 2:45 PM CDTSevere Thunderstorm WarningFSDWoodbury30 min
Jun 20, 3:04 PM CDTSevere Thunderstorm WarningFSDPlymouth46 min
Jun 20, 3:18 PM CDTSevere Thunderstorm WarningFSDWoodbury47 min
Jun 20, 3:51 PM CDTSevere Thunderstorm WarningFSDPlymouth34 min
Jun 20, 3:55 PM CDTSevere Thunderstorm WarningFSDCherokee35 min
Jun 20, 4:37 PM CDTSevere Thunderstorm WarningFSDWoodbury33 min
Jun 20, 6:09 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida31 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.