Alert archive / Minnesota / Tornado Warnings in 1993

Tornado Warning 6, NWS Grand Forks, ND

July 27, 1993Roseau County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 27, 1993, 4:56 PM CDT for Roseau County, Minnesota. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1993, 4:56 PM CDT (21:56 UTC)
Expired
Jul 27, 1993, 6:00 PM CDT
In force
64 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Roseau County, MN

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 9.9 hours before the alert went out and 186 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 12:00Z on 1993-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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 12:00Z on 1993-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
3 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
540 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
128 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 KINL 272200 COR
TORINL
MNC135-272300-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE INTERNATIONAL FALLS MN
456 PM CDT TUE JUL 27 1993

THE NATIONAL WEATHER SERVICE IN INTERNATIONAL FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PERSONS IN THE FOLLOWING LOCATION...

IN NORTHWEST MINNESOTA

   ...WESTERN ROSEAU COUNTY

AT 450 PM CDT A RADAR INDICATED SEVERE THUNDERSTORM WITH SEVERAL REPORTS
OF TORNADOS IN NORTH CENTRAL MARSHALL COUNTY OR 46 MILES SOUTHWEST OF 
WARROAD. THESE STORMS ARE MOVING NORTHEAST AT 30 MPH INTO WESTERN ROSEAU
COUNTY.

THE TOWNS OF GREENBUSH...STRATHCONA...BADGER...HAUG AND ROSEAU.

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.



NNNN

What forecasters said that day

The local office's own words before this tornado 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, Jul 27, 2:50 PM CDT, 2 hours 6 minutes before
NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-272045-

SPECIAL WEATHER STATEMENT FOR COLD AIR FUNNELS
NATIONAL WEATHER SERVICE FARGO ND
245 PM CDT TUE JULY 27 1993

...COLD AIR FUNNELS REPORTED OVER JUST NORTHWEST OF LAKOTA IN NELSON
COUNTY AND IN THE MCCANNA AREA OF WESTERN GRAND FORKS COUNTY...

AT 230 PM CDT  REPORTS OF COLD AIR FUNNELS WERE RECEIVED AT THE
NATIONAL WEATHER SERVICE OFFICE IN FARGO NORTH DAKOTA.  THESE COLD
AIR FUNNELS WERE REPORTED BY THE LOCAL LAW ENFORCEMENT AGENCIES.
THEY ARE CURRENTLY WATCHING THESE COLD AIR FUNNELS AND WARNINGS WILL
BE ISSUED IF NECESSARY.

COLD AIR FUNNELS ARE NOT ASSOCIATED WITH SEVERE THUNDERSTORMS AS
ARE THE TYPE OF FUNNEL CLOUD THAT PRODUCES A TORNADO.  COLD AIR
FUNNELS ARE FORMED BY THUNDERSTORMS AND RAINSHOWERS WHEN UNIQUE
METEOROLOGICAL CIRCUMSTANCES ARE MET.
BENNETT
Local storm report, Jul 27, 3:44 PM CDT, 1 hour 12 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
340 PM CDT TUE JUL 27 1993

TIME      EVENT
335PM     TORNADO TOUCHDOWN JUST EAST OF MINTO ND...ABOUT 30 MILES NORTH
OF GRAND FORKS. REPORTED BY WALSH COUNPTY SHERIFF.  NO DAMAGE ESTIMATE
REPORTED.
BENNETT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 3:53 PM CDTTornado WarningFGFKittson, Marshall67 min
Jul 27, 4:40 PM CDTSevere Thunderstorm WarningFGFBeltrami65 min
Jul 27, 4:44 PM CDTSevere Thunderstorm WarningFGFBeltrami61 min
Jul 27, 4:58 PM CDTTornado WarningFGFKittson, Marshall62 min
Jul 27, 5:45 PM CDTTornado WarningFGFRoseau60 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.