Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 101, NWS Sioux Falls, SD

July 18, 1994Lincoln County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 18, 1994, 2:22 PM CDT for Lincoln County, Minnesota. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Jul 18, 1994, 2:22 PM CDT (19:22 UTC)
Expired
Jul 18, 1994, 2:54 PM CDT
In force
32 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Lincoln County, MN

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 7.4 hours before the alert went out and 177 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, Aberdeen, SD at 12:00Z on 1994-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1907 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, Aberdeen, SD at 12:00Z on 1994-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 159 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
1907 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1147 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
159 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 181923 RRA
SVRFSD
MNC081-083-182000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
222 PM CDT MON JUL 18 1994
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST MINNESOTA
 
   ...NORTHEASTERN LINCOLN COUNTY...NORTHWESTERN LYON COUNTY
 
AT 220 PM CDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM 5 MILES SOUTH OF PORTER...OR 25 MILES NORTHWEST OF MARSHALL 
THIS STORM WAS MOVING SOUTHEAST AT 20 MPH AND WILL AFFECT THE TOWNS OF
TAUNTON BY 240 PM AND MINNEOTA BY 250 PM 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.
 
HEITKAMP

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

Local storm report, Jul 18, 2:09 PM CDT, 13 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
230 PM CDT MON JUL 18 1994

STORM DATA FOR JUL 18 1994
TIME           COUNTY...LOCATION            CHARACTER OF STORM...DAMAGE
625 AM CDT     HYDE CO...2 SE SPRING LAKE   GOLF BALL SIZE HAIL

630 AM CDT     HYDE CO...1 N LAKE MITCHELL  3/4 INCH SIZE HAIL

635 AM CDT     HYDE CO...16 N HIGHMORE      2 INCH SIZE HAIL

730 AM CDT     HYDE CO...HIGHMORE           GOLF BALL SIZE HAIL

752 AM CDT     HYDE CO...HIGHMORE & 25N     GOLF BALL SIZE HAIL

755 AM CDT     HAND CO...1/2 S REE HEIGHTS  GOLF BALL SIZE HAIL

825 AM CDT     HAND CO...10 S MILLER        GOLF BALL SIZE HAIL
MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 2:22 PM CDTSevere Thunderstorm WarningFSDLyon38 min
Jul 18, 2:58 PM CDTSevere Thunderstorm WarningFSDLyon, Murray47 min
Jul 18, 3:13 PM CDTSevere Thunderstorm WarningFSDLincoln32 min
Jul 18, 3:48 PM CDTSevere Thunderstorm WarningFSDCottonwood, Murray42 min
Jul 18, 3:52 PM CDTSevere Thunderstorm WarningFSDLincoln48 min
Jul 18, 4:31 PM CDTSevere Thunderstorm WarningFSDJackson44 min
Jul 18, 4:34 PM CDTSevere Thunderstorm WarningFSDMurray, Pipestone41 min
Jul 18, 5:07 PM CDTTornado WarningFSDJackson38 min
Jul 18, 5:16 PM CDTSevere Thunderstorm WarningFSDMurray, Pipestone29 min
Jul 18, 5:18 PM CDTSevere Thunderstorm WarningFSDNobles42 min
Jul 18, 5:48 PM CDTSevere Thunderstorm WarningFSDMurray21 min
Jul 18, 5:54 PM CDTSevere Thunderstorm WarningFSDJackson28 min
Jul 18, 6:02 PM CDTSevere Thunderstorm WarningFSDNobles43 min
Jul 18, 6:46 PM CDTSevere Thunderstorm WarningFSDNobles29 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994Every severe thunderstorm warning in 1994

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.