Alert archive / Minnesota / Tornado Warnings in 1986

Tornado Warning 11, NWS Grand Forks, ND

July 26, 1986Stevens County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 26, 1986, 11:33 PM CDT for Stevens County, Minnesota. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jul 26, 1986, 11:33 PM CDT (04:33 UTC)
Expired
Jul 27, 1986, 12:15 AM CDT
In force
42 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Stevens County, MN

The radar

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

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 4.6 hours before the alert went out and 203 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, Aberdeen, SD at 00:00Z on 1986-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1680 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, Aberdeen, SD at 00:00Z on 1986-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
1680 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1819 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 270433
TORFAR
MNC149-270515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE FARGO ND
1133 PM CDT SAT JUL 26 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

WEST CENTRAL MINNESOTA...STEVENS

AT 1127 AM CDT A TORNADO WAS REPORTED BY LAW ENFORCEMENT
OFFICIALS 5 MILES WEST OF CHOKIO MINNESOTA. THIS WARNING
ENCLUDES THE TOWNS OF CHOKIO AND MORRIS MINNESOTA.

THIS STORM IS ACCOMPANIED BY INTENSE LIGHTNING..LARGE HAIL..AND
DANGEROUS STRAIGHT LINE WINDS.

THIS STORM MAY ALSO CAUSE FLOODING OF SMALL STREAMS AND UNDERPASSES.

IF A TORNADO IS APPROACHING GET INTO A BASEMENT...IF NO BASEMENT
IS AVAILABLE...GET INTO THE INNERMOST HALLWAY...STAY AWAY FROM
WINDOWS.  IF CAUGHT OUTSIDE GET INTO A DITCH...GULLY...RAVINE...OR
EVEN A LOW LYING SPOT ON THE GROUND.  PROTECT YOUR HEAD.  ABANDON
CARS AND MOBILE HOMES.

IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY.

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

Local storm report, Jul 26, 6:45 PM CDT, 4 hours 48 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
645 PM CDT SAT JUL 26 1986

TIME      EVENT
555 PM    MCHENRY ND COOP OBSERVER RPTD 30 MPH WIND...VRY HVY RAIN AND
          NO HAIL.

620 PM    CAVALIER 7NW ND RPTD 1.4 INCHES RAIN SINCE 4PM AND STILL
          RAINING. 40 MPH WIND. NO HAIL.

640 PM    WALHALLA ND COOP OBSVR RPTD 2.75 INCHES RAIN IN ONE HOUR.
          HEAVIEST RAIN FELL AROUND 6PM.
Special weather statement, Jul 26, 7:40 PM CDT, 3 hours 53 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
730 PM CDT SAT JUL 26 1986

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 11 PM CDT FOR MUCH OF
EASTERN NORTH DAKOTA AND A SMALL PORTION OF NORTHWEST MINNESOTA..AND
UNTIL MIDNIGHT FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA...

AT 630 PM CDT...SCATTERED THUNDERSTORMS..A FEW WITH VERY HEAVY RAIN
..EXTENDED FROM NORTHWEST MINNESOTA ACROSS PORTIONS OF NORTHEAST..
CENTRAL AND EAST CENTRAL NORTH DAKOTA.  THE STRONGEST THUNDERSTORMS
WERE 30 MILES WEST OF JAMESTOWN NORTH DAKOTA. THESE STORMS WERE MOVING
EAST AT 20 MILES AN HOUR AND SHOULD MOVE INTO NORTHCENTRAL LA MOURE
COUNTY OF SOUTHEAST NORTH DAKOTA BY 815 PM. IN ADDITION TO THE VERY
HEAVY RAIN THIS STORM COULD PRODUCE BRIEF GUSTY WIND AND HAIL. OTHER
THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM JUST NORTHWEST OF GRAND
FORKS NORTH DAKOTA TO THE SOUTHWEST OF JAMESTOWN NORTH DAKOTA. THESE
STORMS WERE ALSO MOVING EAST AT 20 MILES AN HOUR.

MOVEMENT OF THE AREA OF SHOWERS AND THUNDERSTORMS WAS EAST AT 20
MILES AN HOUR.

IF YOU LIVE WITHIN EITHER OF THE WATCH AREAS YOU SHOULD BE ALERT FOR
THREATENING WEATHWR CONDITIONS.. AND STAY TUNED TO RADIO..T.V.X AS WELL
AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
BENNETT
Special weather statement, Jul 26, 7:42 PM CDT, 3 hours 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION FOR TIME
NATIONAL WEATHER SERVICE FARGO ND
730 PM CDT SAT JUL 26 1986

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 11 PM CDT FOR MUCH OF
EASTERN NORTH DAKOTA AND A SMALL PORTION OF NORTHWEST MINNESOTA..AND
UNTIL MIDNIGHT FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA...

AT 727 PM CDT...SCATTERED THUNDERSTORMS..A FEW WITH VERY HEAVY RAIN
..EXTENDED FROM NORTHWEST MINNESOTA ACROSS PORTIONS OF NORTHEAST..
CENTRAL AND EAST CENTRAL NORTH DAKOTA.  THE STRONGEST THUNDERSTORMS
WERE 30 MILES WEST OF JAMESTOWN NORTH DAKOTA. THESE STORMS WERE MOVING
EAST AT 20 MILES AN HOUR AND SHOULD MOVE INTO NORTHCENTRAL LA MOURE
COUNTY OF SOUTHEAST NORTH DAKOTA BY 815 PM. IN ADDITION TO THE VERY
HEAVY RAIN THIS STORM COULD PRODUCE BRIEF GUSTY WIND AND HAIL. OTHER
THUNDERSTORMS WITH HEAVY RAIN EXTENDED FROM JUST NORTHWEST OF GRAND
FORKS NORTH DAKOTA TO THE SOUTHWEST OF JAMESTOWN NORTH DAKOTA. THESE
STORMS WERE ALSO MOVING EAST AT 20 MILES AN HOUR.

MOVEMENT OF THE AREA OF SHOWERS AND THUNDERSTORMS WAS EAST AT 20
MILES AN HOUR.

IF YOU LIVE WITHIN EITHER OF THE WATCH AREAS YOU SHOULD BE ALERT FOR
THREATENING WEATHWR CONDITIONS.. ANDY STAY TUNED TO RADIO..T.V. AS WELL
AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
BENNETT
Local storm report, Jul 26, 8:27 PM CDT, 3 hours 6 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
825 PM CDT SAT JUL 26 1986

TIME      EVENT
720 PM    VRY HVY RAIN AND 40 MPH WIND AT WIMBLEDON ND.

815 PM    RAINFALL AMOUNTS FROM HAM RADIO OPERATORS..{GRAFTON ND 1.4...
          MINTO ND .50...COOPERSTOWN ND 1.6(FELL BETWEEN 715-800PM)...
          LAKOTA ND 1.3...DEVILS LAKE ND 3.25.
Special weather statement, Jul 26, 8:45 PM CDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
835 PM CDT SAT JUL 26 1986

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 11 PM CDT FOR MUCH OF
EASTERN NORTH DAKOTA AND A SMALL PORTION OF NORTHWEST MINNESOTA..AND
UNTIL MIDNIGHT FOR WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA...

AT 825 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 55 MILES NORTHWEST
OF FARGO NORTH DAKOTA..IN THE COLGATE/HOPE AREA OF EAST CENTRAL NORTH
DAKOTA. THIS STORM WAS MOVING SOUTHEAST AT 15 MILES AN HOUR AND SHOULD
MOVE INTO THE HUNTER/ARTHUR AREA OF NORTH CENTRAL CASS COUNTY OF NORTH
DAKOTA BY 915 PM. THIS STORM HAD ONLY PRODUCED VERY HEAVY RAIN.

OTHER SHOWERS AND THUNDERSTORMS..A FEW WITH VERY HEAVY RAIN..EXTENDED
FROM THE SOUTH DAKOTA LINE SOUTHWEST OF JAMESTOWN NORTH DAKOTA NORTHEAST
THROUGH CENTRAL AND NORTHEAST NORTH DAKOTA INTO NORTHWEST MINNESOTA.

THESE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST AT 15 MILES AN HOUR.

IF YOU LIVE WITHIN EITHER OF THE WATCH AREAS YOU SHOULD BE ALERT FOR
THREATENING WEATHER CONDITIONS.. AND STAY TUNED TO RADIO..T.V. AS WELL
AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
BENNETT
Local storm report, Jul 26, 10:26 PM CDT, 1 hour 7 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1020 PM CDT SAT JUL 26 1986

TIME      EVENT
830 PM    CO-OPERATIVE OBSERVER AT HOPE NORTH DAKOTA..STEELE COUNTY..
          REPORTED VERY HEAVY RAIN..NO HAIL..WIND ESTIMATED AT 40 MPH.
835 PM    CO-OPERATIVE OBSERVER AT VALLEY CITY NORTH DAKOTA..BARNES
          COUNTY..REPORTED VERY HEAVY RAIN WITH WIND ESTIMATED AT 30 TO
          40 MPH WITH HIGHER GUST.
905 PM    CO-OPERATIVE OBSERVER AT LITCHVILLE NORTH DAKOTA..BARNES
          COUNTY..REPORTED VERY HEAVY RAIN..30 TO 40 MPH WIND AND PEA
          TO MARBLE SIZED HAIL WHICH LASTED 17 MINUTES.
943 PM    TRAIL COUNTY SHERIFF..10 MILES EAST OF GALESBURG NORTH DAKOTA
          ..TRAILL COUNTY..REPORTED VERY HEAVY RAIN..NO HAIL AND WINDS
          50 TO 60 MPH.
1000 PM   LITCHVILLE NORTH DAKOTA REPORTED 3.00 INCHES RAIN IN TOWN.
1005 PM   CO-OPERATIVE OBSERVER AT LITCHVILLE NORTH DAKOTA..BARNES
          COUNTY REPORTED 2.50 INCHES OF RAIN.
ANDERSEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 9:59 PM CDTSevere Thunderstorm WarningFGFClay, Norman46 min
Jul 27, 6:56 PM CDTTornado WarningFGFBecker54 min

Nearby

Tornado Warnings in Minnesota, 1986Every tornado warning in 1986Tornadoes in 1986

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.