Alert archive / Iowa / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 10, NWS Sioux Falls, SD

June 7, 1995Lyon County, Sioux County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 7, 1995, 1:48 AM CDT for Lyon County, Sioux County, Iowa. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jun 7, 1995, 1:48 AM CDT (06:48 UTC)
Expired
Jun 7, 1995, 2:30 AM CDT
In force
42 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Lyon County, IA, Sioux County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.8 hours before the alert went out and 213 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 1995-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2589 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 1995-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
2589 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1343 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFSD 070649 RRA
SVRFSD
IAC119-167-070730-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
148 AM CDT WED JUN 7 1995
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  230 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST IOWA
 
   ...EASTERN LYON COUNTY...NORTHEASTERN SIOUX COUNTY
 
AT 145 AM CDT RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS TO 25 MILES
SOUTHEAST OF SIOUX FALLS NEAR ROCK RAPIDS TO 40 MILES SOUTHEAST OF SIOUX
FALLS NEAR SIOUX CENTER IOWA. THE LINE WAS MOVING EAST AT 40 MPH.
 
THESE THUNDERSTORMS WILL MOVE THROUGH GEORGE...LITTLE ROCK AND BOYDEN
IOWA BEFORE 230 AM CDT.
 
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS
OF 60 MPH...HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING...AND HEAVY
RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA.
 
BL.OOM

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, Jun 6, 8:15 PM CDT, 5 hours 33 minutes before
SDZ045-048-080715-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
815 PM CDT TUE JUN 6 1995

TWO ISOLATED THUNDERSTORMS WITH VERY HEAVY RAIN...SMALL HAIL AND
GUSTY WINDS WERE LOCATED ON THE WHITE RIVER/10 MILES SOUTHWEST
OF MURDO AND 10 MILES SOUTHEAST OF DRAPER.

THESE TWO STORMS HAVE INDICATED LITTLE OR NO MOVEMENT OVER THE PAST
TWO HOURS.  PERSONS ALONG THE WHITE RIVER IN SOUTHERN JONES AND
SOUTHWEST LYMAN COUNTIES SHOULD BE ON THE ALERT FOR POSSIBLE FLASH
FLOODING OF LOW LYING AREAS.

PFEIFFER

IF YOU LIVE IN AN AREA PRONE TO FLOODING...BY PREPARED TO MOVE
TO HIGHER GROUND.  PLEASE STAY INFORMED BY LISTENING TO THE LATEST
STATEMENTS AND POSSIBLE WARNINGS ISSUED BY THE NATIONAL WEATHER
SERVICE.

...SOLOMON

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Special weather statement, Jun 6, 8:25 PM CDT, 5 hours 23 minutes before
SDZ045-048-080715-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
815 PM CDT TUE JUN 6 1995

TWO ISOLATED THUNDERSTORMS WITH VERY HEAVY RAIN...SMALL HAIL AND
GUSTY WINDS WERE LOCATED ON THE WHITE RIVER/10 MILES SOUTHWEST
OF MURDO AND 10 MILES SOUTHEAST OF DRAPER.

THESE TWO STORMS HAVE INDICATED LITTLE OR NO MOVEMENT OVER THE PAST
TWO HOURS.  PERSONS ALONG THE WHITE RIVER IN SOUTHERN JONES AND
SOUTHWEST LYMAN COUNTIES SHOULD BE ON THE ALERT FOR POSSIBLE FLASH
FLOODING OF LOW LYING AREAS.

PFEIFFER

IF YOU LIVE IN AN AREA PRONE TO FLOODING...BY PREPARED TO MOVE
TO HIGHER GROUND.  PLEASE STAY INFORMED BY LISTENING TO THE LATEST
STATEMENTS AND POSSIBLE WARNINGS ISSUED BY THE NATIONAL WEATHER
SERVICE.

...SOLOMON
Special weather statement, Jun 6, 8:28 PM CDT, 5 hours 20 minutes before
SDZ045-048-080715-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
815 PM CDT TUE JUN 6 1995

TWO ISOLATED THUNDERSTORMS WITH VERY HEAVY RAIN...SMALL HAIL AND
GUSTY WINDS WERE LOCATED ON THE WHITE RIVER/10 MILES SOUTHWEST
OF MURDO AND 10 MILES SOUTHEAST OF DRAPER.

THESE TWO STORMS HAVE INDICATED LITTLE OR NO MOVEMENT OVER THE PAST
TWO HOURS.  PERSONS ALONG THE WHITE RIVER IN SOUTHERN JONES AND
SOUTHWEST LYMAN COUNTIES SHOULD BE ON THE ALERT FOR POSSIBLE FLASH
FLOODING OF LOW LYING AREAS.

PFEIFFER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 1:10 AM CDTSevere Thunderstorm WarningFSDLyon, Sioux35 min
Jun 7, 2:15 AM CDTSevere Thunderstorm WarningFSDOsceola60 min
Jun 7, 2:50 AM CDTSevere Thunderstorm WarningFSDDickinson40 min
Jun 7, 5:44 AM CDTSevere Thunderstorm WarningFSDWoodbury31 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.