Alert archive / Minnesota / Tornado Warnings in 1993

Tornado Warning 9, NWS Grand Forks, ND

July 27, 1993Lake of the Woods County, Roseau County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 27, 1993, 7:05 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1993, 7:05 PM CDT (00:05 UTC)
Expired
Jul 27, 1993, 7:45 PM CDT
In force
40 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Lake of the Woods County, MN, Roseau County, MN

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.1 hours before the alert went out and 153 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, International Fa, MN at 00:00Z on 1993-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1026 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, International Fa, MN at 00:00Z on 1993-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.1939587897Sfc1 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
1026 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.8
Supercell composite
3.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KINL 280005
TORINL
MNC077-135-280045-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN
705 PM CDT TUE JUL 27 1993
 
THE NATIONAL WEATHER SERVICE IN INTERNATIONAL FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PERSONS IN THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL MINNESOTA
 
   ...NORTHERN LAKE OF THE WOODS COUNTY
 
IN NORTHWEST MINNESOTA
 
   ...EASTERN ROSEAU COUNTY
 
AT 700 PM CDT...THE ROSEAU COUNTY LAW ENFORCEMENT CENTER REPORTED
TORNADOES ABOUT 10 MILES SOUTH OF WARROAD...NEAR CLEAR RIVER...AND
ABOUT 5 MILES SOUTHEAST OF WARROAD...NEAR SWIFT.
 
THE THUNDERSTORMS PRODUCING THE TORNADOES WERE MOVING NORTHEAST AT
35 MILES AN HOUR.
 
COMMUNITIES IN THE PATH OF THESE TORNADOES INCLUDE WARROAD...THE
RESORT AREAS OF LAKE OF THE WOODS AND THE NORTHWEST ANGLE. PERSONS
IN THESE AREAS SHOULD MOVE TO IMMEDIATE SHELTER!!
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
PACKINGHAM
 
NNNN

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 27, 7:28 PM CDTSevere Thunderstorm WarningFGFKoochiching, Lake of the Woods62 min
Jul 27, 8:48 PM CDTTornado WarningFGFBeltrami, Clearwater42 min

Nearby

Tornado Warnings in Minnesota, 1993Every tornado warning in 1993Tornadoes in 1993

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.