Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 153, NWS Twin Cities, MN

August 6, 1996Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 6, 1996, 6:59 PM CDT for Yellow Medicine County, Minnesota. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 6, 1996, 6:59 PM CDT (23:59 UTC)
Expired
Aug 6, 1996, 8:00 PM CDT
In force
61 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 143 km from the middle of the area, began a volume at 00:11 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

Minneapolis, MN (KMPX), launched 12:00Z, 12.0 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 1996-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1662 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, Minneapolis, MN at 12:00Z on 1996-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 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
1662 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
653 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 070002 RRA
SVRMSP
MNC173-070100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
659 PM CDT TUE AUG 6 1996

* SEVERE THUNDERSTORM WARNING FOR
  EASTERN YELLOW MEDICINE COUNTY - SOUTHWEST MINNESOTA

* UNTIL 800 PM CDT
 
* SOME LOCATIONS AFFECTED
    GRANITE FALLS
    HAZEL RUN
    HANLEY FALLS
    WOOD LAKE

* AT 658 PM CDT DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 30
  MILES SOUTH OF MONTEVIDEO MOVING EAST AT 15 MPH..

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! A TORNADO
WATCH IS IN EFFECT.  SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES.

RICHARDSON
 
IN OPEN AREAS...GO TO A LOW PLACE SUCH AS A RAVINE OR VALLEY.
6

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, Aug 6, 2:10 PM CDT, 4 hours 49 minutes before
MNZ004>096-070200-

SPECIAL WEATHER STATEMENT...MINNESOTA SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
200 PM CDT TUE AUG 6 1996

...SEVERE WEATHER EXPECTED TO DEVELOP ACROSS MINNESOTA LATE THIS
AFTERNOON AND THIS EVENING...

THE STORM PREDICTION CENTER INDICATES THAT THERE IS A SIGNIFICANT RISK
OF SEVERE THUNDERSTORMS ACROSS SOUTHERN MINNESOTA LATE THIS AFTERNOON
LASTING INTO THIS EVENING.

A STRONG COLD FRONT WAS MOVING INTO WESTERN PORTIONS OF MINNESOTA
EARLY THIS AFTERNOON. THIS FRONT WILL MOVE SLOWLY EASTWARD DURING THE
EVENING...BUMPING INTO THE HOT AND VERY HUMID AIRMASS OVER THE STATE.
THUNDERSTORMS SHOULD DEVELOP RAPIDLY AFTER 4 PM FROM NORTH CENTRAL TO
SOUTHWEST MINNESOTA. THE LINE OF STORMS WILL THEN SHIFT EASTWARD AND
AFFECT EASTERN PORTIONS OF THE STATE THROUGH THE EVENING HOURS.
<
THE MAIN THREAT FROM THE STORMS WILL BE STRONG WINDS...HAIL...AND
HEAVY DOWNPOURS. A FEW STORMS DURING THE EVENING MAY HAVE THE POTENTIAL
TO PRODUCE TORNADOES ACROSS WEST CENTRAL AND SOUTHWEST MINNESOTA.

PERSONS IN MINNESOTA ARE URGED TO STAY TUNED TO NOAA WEATHER RADIO FOR
ANY WATCHES OR WARNINGS ISSUED BY THE NATIONAL WEATHER SERVICE.
SEVERE STORM SPOTTER ACTIVATION MAY BE REQUIRED AS WELL.
DWE/JPR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 5:17 PM CDTSevere Thunderstorm WarningMPXSwift63 min
Aug 6, 6:13 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope47 min
Aug 6, 6:53 PM CDTSevere Thunderstorm WarningMPXChippewa67 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996

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.