Alert archive / Minnesota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 21, NWS Grand Forks, ND

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

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 27, 1993, 7:28 PM CDT for Koochiching County, Lake of the Woods County, Minnesota. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1993, 7:28 PM CDT (00:28 UTC)
Expired
Jul 27, 1993, 8:30 PM CDT
In force
62 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

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

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.5 hours before the alert went out and 77 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 280028
SVRINL
MNC071-077-280130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN
728 PM CDT TUE JUL 27 1993
 
THE NATIONAL WEATHER SERVICE IN INTERNATIONAL FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  830 PM CDT
FOR PERSONS IN THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL MINNESOTA
 
   ...KOOCHICHING COUNTY...SOUTHERN LAKE OF THE WOODS COUNTY
 
AT 725 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
EXTENDING FROM WARROAD...SOUTHEAST TO UPPER RED LAKE...OR 60 MILES
NORTH OF BEMIDJI.
 
THESE THUNDERSTORMS ARE MOVING NORTHEAST AT 35 MILES AN HOUR AND
ARE EXPECTED TO AFFECT THE TOWNS OF CLEMENTSON...BAUDETTE...PITT
AND BORDER BY 800 PM CDT.
 
ANOTHER SEVERE THUNDERSTORM INDICATED BY RADAR...WAS APPROXIMATELY
10 MILES SOUTHWEST OF THE TOWN OF RAY...OR 20 MILES SOUTH-SOUTHEAST
OF INTERNATIONAL FALLS...AND WILL AFFECT RAY BY 800 PM. THIS
THUNDERSTORM WAS ALSO MOVING NORTHEAST AT 35 MILES AN HOUR.
 
WINDS IN EXCESS OF 75 MPH..MAKE THIS A DANGEROUS STORM. YOU SHOULD
PREPARE FOR STRONG WINDS..LARGE HAIL..DEADLY LIGHTNING AND HEAVY RAIN
BY MOVING TO SHELTER IN A STRONG BUILDING. REMEMBER SEVERE
THUNDERSTORMS CAN AND DO PRODUCE TORNADOES WITH LITTLE OR NO WARNING.
 
PACKINGHAM
 
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 7:05 PM CDTTornado WarningFGFLake of the Woods, Roseau40 min
Jul 27, 8:48 PM CDTTornado WarningFGFBeltrami, Clearwater42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1993Every severe thunderstorm warning 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.