Alert archive / Iowa / Tornado Warnings in 1995

Tornado Warning 6, NWS Sioux Falls, SD

July 23, 1995Plymouth County, Iowa

NWS Sioux Falls, SD issued this tornado warning at Jul 23, 1995, 6:34 PM CDT for Plymouth County, Iowa. It was in force for 23 min.

The area

The counties it named.

The facts

Issued
Jul 23, 1995, 6:34 PM CDT (23:34 UTC)
Expired
Jul 23, 1995, 6:57 PM CDT
In force
23 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Plymouth County, IA

The radar

The Sioux Falls radar (KFSD), 103 km from the middle of the area, began a volume at 23:37 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, 11.6 hours before the alert went out and 158 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 1995-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 334 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 1995-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 square meters per square second.19395878Sfc1 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
334 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1045 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
26 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 232336
TORFSD
IAC149-240010-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
634 PM CDT SUN JUL 23 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 710 PM CDT (610 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWEST IOWA

   ...SOUTH CENTRAL PLYMOUTH COUNTY
 
AT 633 PM CDT...A TORNADO WAS DETECTED BY SIOUX FALLS DOPPLER RADAR
11 MILES NORTHEAST OF SIOUX CITY OR NEAR NEPTUNE MOVING EAST AT 30
MPH.

AT PRESENT MOVEMENT THE TORNADO WILL BE AROUND...
KINGSLEY                 BY 658 PM CDT
 
DO NOT USE YOUR CAR TO OUTRUN A TORNADO.  CARS ARE EASILY TOSSED
AROUND BY TORNADIC WINDS.  IF YOU ARE CAUGHT IN VTHE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG REINFORCED BUILDING.  IF
NO STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

MED

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 3:26 PM CDTSevere Thunderstorm WarningFSDLyon44 min
Jul 23, 5:03 PM CDTSevere Thunderstorm WarningFSDSioux62 min
Jul 23, 5:31 PM CDTSevere Thunderstorm WarningFSDPlymouth64 min
Jul 23, 6:20 PM CDTSevere Thunderstorm WarningFSDWoodbury50 min

Nearby

Tornado Warnings in Iowa, 1995Every tornado warning in 1995Tornadoes 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.