Alert archive / Minnesota / Tornado Warnings in 1986

Tornado Warning 13, NWS Grand Forks, ND

July 27, 1986Polk County, Minnesota; Grand Forks County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 27, 1986, 7:51 PM CDT for Polk County, Minnesota; Grand Forks County, North Dakota. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1986, 7:51 PM CDT (00:51 UTC)
Expired
Jul 27, 1986, 8:50 PM CDT
In force
59 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Polk County, MN, Grand Forks County, ND

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

International Fa, MN (KINL), launched 00:00Z, 0.9 hours before the alert went out and 281 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 1986-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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 1986-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
22 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1566 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
10 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 KFAR 280051
TORFAR
NDC035-MNC119-280150-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE FARGO ND
751 PM CDT SUN JUL 27 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 850 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTHEAST NORTH DAKOTA...EASTERN GRAND FORKS AND THE CITY OF GRAND 
 FORKS
NORTHWEST MINNESOTA...POLK AND THE CITY OF CROOKSTON

AT 745 PM CDT A TORNADO WAS REPORTED BY THIEF RIVER FALLS WARNING
POINT ON THE GROUND AT MALLORY MINNESOTA.

THIS WARNING ALSO INCLUDES THE CITY OF EAST GRAND FORKS MINNESOTA.

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 HOMES.

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

SPIES

Nearby

Tornado Warnings in Minnesota, 1986Tornado Warnings in North Dakota, 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.