Alert archive / Iowa / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 131, NWS Sioux Falls, SD

July 16, 1996Ida County, Woodbury County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 16, 1996, 11:36 PM CDT for Ida County, Woodbury County, Iowa. It was in force for 34 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
Jul 16, 1996, 11:36 PM CDT (04:36 UTC)
Expired
Jul 17, 1996, 12:10 AM CDT
In force
34 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Ida County, IA, Woodbury County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.6 hours before the alert went out and 128 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 1996-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1921 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 1996-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 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
1921 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.5

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, Jul 16, 10:42 PM CDT, 54 minutes before
TTAA00 KFSD DDHHMM
IAZ031-032-170600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1040 PM CDT TUE JUL 17 1996

...TORNADO WATCH 790 REPLACED BY SEVERE THUNDERSTORM WATCH 791...

THE TORNADO WATCH THAT WAS IN IN EFFECT UNTIL 1 AM FOR WOODBURY AND
IDA COUNTIES IN IOWA HAS BEEN REPLACED BY A SEVERE THUNDERSTORM WATCH
WHICH IS VALID UNTIL 4 AM CDT FOR MUCH OF SOUTHEAST SOUTH DAKOTA...
NORTHEAST NEBRASKA...AND NORTHWEST IOWA.

CHAPMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 10:04 PM CDTSevere Thunderstorm WarningFSDYankton31 min
Jul 16, 10:40 PM CDTSevere Thunderstorm WarningFSDYankton35 min
Jul 16, 7:17 PM CDTSevere Thunderstorm WarningFSDWoodbury43 min
Jul 16, 8:02 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury48 min
Jul 16, 10:24 PM CDTSevere Thunderstorm WarningFSDWoodbury31 min
Jul 16, 10:48 PM CDTFlash Flood WarningFSDWoodbury3 hr
Jul 16, 10:56 PM CDTSevere Thunderstorm WarningFSDWoodbury34 min
Jul 17, 1:28 AM CDTFlash Flood WarningFSDWoodbury3 hr

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; the sounding from the Mesonet's radiosonde archive.