Alert archive / Minnesota / Tornado Warnings in 1988

Tornado Warning 3, NWS Grand Forks, ND

June 18, 1988Mahnomen County, Norman County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jun 18, 1988, 7:35 PM CDT for Mahnomen County, Norman County, Minnesota. It was in force for 55 min. 4 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 18, 1988, 7:35 PM CDT (00:35 UTC)
Expired
Jun 18, 1988, 8:30 PM CDT
In force
55 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Mahnomen County, MN, Norman County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Jun 18, 7:40 PM CDTHail 1.25Norman, MN
Jun 18, 7:50 PM CDTThunderstorm Wind 0Norman, MN
Jun 18, 7:57 PM CDTThunderstorm Wind 61Norman, MN
Jun 18, 8:15 PM CDTHail 2Norman, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.6 hours before the alert went out and 252 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 1988-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 882 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 1988-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
882 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1984 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 190035
TORFAR
MNC087-107-190130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE FARGO ND
735 PM CDT SAT JUN 18 1988

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTHWEST PART OF MINNESOTA
      MAHNOMEN...EASTERN NORMAN

AT 730 PM CDT...A FUNNEL CLOUD WAS REPORTED IN THE GARY MINNESOTA
AREA...35 MILES NORTH OF FARGO.

IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE TO BE IS IN
A BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...FIND SHELTER IN A CENTRAL INTERIOR
ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...
PILLOWS...OR CUSHIONS TO COVER YOUR BODY AND PROTECT YOUR HEAD.
AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES FOR A REINFORCED
BUILDING.

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO.  CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS.  IF YOU ARE CAUGHT IN THE PATH OF
A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING.  IF NO
STRUCTURE IS NEARBY...TAKE SHELTER IN A DITCH OR LOW SPOT.

IF YOU LIVE IN A HOME OR APARTMENT...FIND SHELTER IN THE INNERMOST
PORCTION OF THE BUILDING ON THE LOWEST FLOOR.  GET TO A BASEMENT IF
ONE IS AVAILABLE.  AVOID WINDOWS.  PROTECT YOURSELF FROM FLYING
DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.

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, Jun 18, 5:32 PM CDT, 2 hours 3 minutes before
SPECIAL WEATHER STATEMENT RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
535 PM CDT SAT JUN 18 1988

...SEVERE THUNDERSTORM WATCH FOR EASTERN NORTH DAKOTA...NORTHWEST AND
   WEST CENTRAL MINNESOTA UNTIL 1000PM CDT.

AT 525 PM CDT...AN ISOLATED STRONG THUNDERSTORM HAD DEVELOPED RAPIDLY
OVER EAST CENTRAL NORTH DAKOTA 50 MILES SOUTHWEST OF GRAND FORKS. THIS
STORM WILL MOVE THROUGH THE ANETA...SHARON/FINLEY AREAS BY 630 PM CDT.

THIS STORM COULD PRODUCE BRIEF HEAVY RAIN...DANGEROUS LIGHTNING AND
STRONG WINDS. MOVEMENT OF THIS STORM WAS EAST AT 45 MILES AN HOUR.

ELSEWHERE...SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH HEAVY RAIN
CONTINUED OVER NORTHEAST NORTH DAKOTA...NORTHWEST AND NORTH CENTRAL
MINNESOTA.

MOVEMENT WAS EAST AT 45 MILES AN HOUR.
VOELKER
Local storm report, Jun 18, 7:30 PM CDT, 5 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
710 PM CDT SAT JUN 18 1988

TIME      EVENT
540 PM     GOLFBALL SIZE HAIL REPORTED IN BINFORD NORTH DAKOTA...45
           MILES SOUTHWEST OF THE GRAND FORKS AIR FORCE BASE. REPORTED
           BY GRIGG COUNTY SHERIFF.
550 PM     GRIGGS COUNTY SHERIFF REPORTED PEA TO WALNUT SIZED HAIL AT
           COOPERSTOWN NORTH DAKOTA.
545 PM     GRIGGS COUNTY SHERIFF REPORTED 11/2 HAIL 5 NORTHEAST OF
           COOPERSTOWN.
600 PM     2 INCH DIAMETER HAIL REPORTED IN BINFORD AREA NORTH DAKOTA
           AND IN JESSIE AREA...50 MILES SOUTHWEST OF GRAND FORKS.
615 PM     AIR FORCE COOP ABSERVER 15 MILES SOUTHEAST OF COOPERSTOWN
           REPORTED TORNADO> ON THE GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:12 PM CDTSevere Thunderstorm WarningFGFMahnomen, Norman, Polk63 min
Jun 18, 7:45 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater60 min
Jun 18, 8:15 PM CDTSevere Thunderstorm WarningFGFMahnomen, Norman, Polk60 min
Jun 18, 9:24 PM CDTSevere Thunderstorm WarningFGFHubbard66 min

Nearby

Tornado Warnings in Minnesota, 1988Every tornado warning in 1988Tornadoes in 1988

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.