Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 166, NWS Twin Cities, MN

August 7, 1994Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 7, 1994, 5:17 PM CDT for Yellow Medicine County, Minnesota. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
Aug 7, 1994, 5:17 PM CDT (22:17 UTC)
Expired
Aug 7, 1994, 6:00 PM CDT
In force
43 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Yellow Medicine County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 10.3 hours before the alert went out and 180 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, Minneapolis, MN at 12:00Z on 1994-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Minneapolis, MN at 12:00Z on 1994-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1220 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
171 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 KSTC 072217 RRA
SVRSTC
MNC173-072300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
517 PM CDT SUN AUG 7 1994
 
THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA  HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL MINNESOTA
 
   ...SOUTHEASTERN YELLOW MEDICINE COUNTY
 
AT 510 PM RADAR SHOWED A SEVERE THUNDERSTORM LOCATED 5 MILES SOUTH
OF GRANITE FALLS OR 25 MILES NORTHWEST OF REDWOOD FALLS MOVING
SOUTHEAST AT 20 MPH. THIS STORM WILL AFFECT THE CITIES OF WOOD LAKE...
AND ECHO BY 545 PM.
 
 
 
YOU SHOULD MOVE INSIDE A STRONG BUILDING.  DO NOT STAND BY WINDOWS.
DON'lT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY
UNTIL THE STORM HAS PASSED.
 
 
 
NNNN

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 4:44 PM CDTSevere Thunderstorm WarningMPXMille Lacs61 min
Aug 7, 5:12 PM CDTSevere Thunderstorm WarningMPXMeeker63 min
Aug 7, 5:27 PM CDTSevere Thunderstorm WarningMPXRedwood48 min
Aug 7, 5:40 PM CDTTornado WarningMPXKandiyohi35 min
Aug 7, 5:47 PM CDTTornado WarningMPXRenville28 min
Aug 7, 6:22 PM CDTSevere Thunderstorm WarningMPXRenville38 min
Aug 7, 6:35 PM CDTSevere Thunderstorm WarningMPXRedwood25 min
Aug 7, 6:44 PM CDTSevere Thunderstorm WarningMPXBrown, Nicollet31 min
Aug 7, 6:54 PM CDTSevere Thunderstorm WarningMPXScott, Sibley36 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.