Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 109, NWS Sioux Falls, SD

August 28, 1995Sioux County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 1995, 6:39 PM CDT for Sioux County, Iowa. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Aug 28, 1995, 6:39 PM CDT (23:39 UTC)
Expired
Aug 28, 1995, 7:25 PM CDT
In force
46 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 23:42 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.7 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 12:00Z on 1995-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1741 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 12:00Z on 1995-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.1939Sfc1 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
1741 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1451 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 4:19 PM CDTTornado WarningFSDMcCook31 min
Aug 28, 4:51 PM CDTSevere Thunderstorm WarningFSDMcCook34 min
Aug 28, 5:16 PM CDTSevere Thunderstorm WarningFSDYankton34 min
Aug 28, 5:22 PM CDTSevere Thunderstorm WarningFSDLincoln33 min
Aug 28, 5:36 PM CDTTornado WarningFSDLincoln34 min
Aug 28, 6:19 PM CDTSevere Thunderstorm WarningFSDLincoln, Union31 min
Aug 28, 6:05 PM CDTSevere Thunderstorm WarningFSDSioux35 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1995Every severe thunderstorm warning in 1995

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.