Alert archive / South Dakota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 190, NWS Sioux Falls, SD

October 16, 1996Clay County, Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Oct 16, 1996, 8:11 PM CDT for Clay County, Yankton County, South Dakota. It was in force for 29 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
Oct 16, 1996, 8:11 PM CDT (01:11 UTC)
Expired
Oct 16, 1996, 8:40 PM CDT
In force
29 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Clay County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 79 km from the middle of the area, began a volume at 01:11 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, 1.2 hours before the alert went out and 195 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 1996-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1552 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 1996-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
1552 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1255 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Oct 16, 4:12 PM CDT, 3 hours 59 minutes before
IAZ001>003-012>014-020>022-031-032-MNZ097-098-NEZ013-014-SDZ001>023-
027-030>071-170915-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
415 PM CDT WED OCT 16 1996

...BIG CHANGE IN THE WEATHER PATTERN EXPECTED...WINTER IS COMING...

A LOW PRESSURE SYSTEM IN THE CENTRAL PLAINS WILL HELP BRING
A SURGE OF COLDER WEATHER AND A CHANCE FOR SNOW TO SOUTH DAKOTA AND
NORTHWEST IOWA.  ALTHOUGH THE BLACK HILLS WILL RECEIVE MOST OF THE
SNOWFALL...RAIN IS EXPECTED TO CHANGE TO SNOW IN THE PLAINS OF
WESTERN SOUTH DAKOTA TONIGHT WITH ONE INCH OF SNOW ACCUMULATION
POSSIBLE.  AS THE COLDER AIR MOVES EAST ACROSS THE AREA RAIN IS
EXPECTED TO CHANGE INTO SNOW LATE TONIGHT IN CENTRAL SOUTH
DAKOTA...AND  POSSIBLY IN EASTERN SOUTH DAKOTA AND NORTHWEST IOWA LATE
THURSDAY AFTERNOON.

TEMPERATURES WILL BE COOLER THURSDAY...WITH DAILY HIGHS EXPECTED TO
BE REACHED DURING THE MORNING AND FALLING TEMPERATURES IN THE
AFTERNOON.  BRISK NORTHERLY WINDS RANGING FROM 20 TO 40 MPH CAN ALSO
BE EXPECTED ACROSS THE AREA THURSDAY AFTERNOON.

ALTHOUGH HEAVY SNOW IS NOT EXPECTED OUTSIDE THE BLACK
HILLS...MOTORISTS SHOULD PREPARE FOR SOME WINTER WEATHER TRAVELING
CONDITIONS ACROSS THE AREA TONIGHT THROUGH THURSDAY NIGHT.

RUBY

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 16, 7:29 PM CDTSevere Thunderstorm WarningFSDHanson, McCook31 min
Oct 16, 8:41 PM CDTSevere Thunderstorm WarningFSDClay29 min
Oct 16, 10:33 PM CDTSevere Thunderstorm WarningFSDO'Brien32 min
Oct 16, 11:01 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson29 min
Oct 17, 12:36 AM CDTSevere Thunderstorm WarningFSDLyon34 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.