Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 46, NWS Sioux Falls, SD

July 23, 1995Lyon County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 23, 1995, 3:26 PM CDT for Lyon County, Iowa. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Jul 23, 1995, 3:26 PM CDT (20:26 UTC)
Expired
Jul 23, 1995, 4:10 PM CDT
In force
44 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Lyon County, IA

The radar

The Sioux Falls radar (KFSD), 48 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 230 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 232027
SVRFSD
IAC119-232110-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
326 PM CDT SUN JUL 23 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 410 PM CDT (310 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWEST IOWA

   ...LYON COUNTY
 
AT 322 PM CDT...A LINE OF SEVERE THUNDERSTORM WAS DETECTED BY SIOUX
FALLS DOPPLER RADAR FROM HILLS MINNESOTA TO NEAR KLONDIKE IOWA OR
ABOUT 15 MILES EAST OF SIOUX FALLS TO ABOUT 20 MILES SOUTH OF
SIOUX FALLS MOVING SOUTHEAST AT 35 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
LARCHWOOD                BY 323 PM CDT
LESTER                   BY 330 PM CDT
LOSTER                   BY 333 PM CDT
ALVORD                   BY 338 PM CDT
ROCK RAPIDS              BY 346 PM CDT
LAKEWOOD                 BY 350 PM CDT
EDNA                     BY 355 PM CDT
GEORGE                   BY 403 PM CDT
GEORGE SUDENGA ARPT      BY 406 PM CDT

 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLTOOR OF YOUR
HOME OR BUSINESS.


MED

The office that day

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

IssuedProductOfficeCountiesLasted
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
Jul 23, 6:34 PM CDTTornado WarningFSDPlymouth23 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.