Alert archive / North Dakota / Tornado Warnings in 1986

Tornado Warning 10, NWS Grand Forks, ND

July 18, 1986LaMoure County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 18, 1986, 6:18 PM CDT for LaMoure County, North Dakota. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jul 18, 1986, 6:18 PM CDT (23:18 UTC)
Expired
Jul 18, 1986, 7:03 PM CDT
In force
45 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County LaMoure 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.3 hours before the alert went out and 169 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, Bismarck Municip, ND at 12:00Z on 1986-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Bismarck Municip, ND at 12:00Z on 1986-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2375 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
339 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 182320 RRA
TORBIS
NDC045-190003-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
 618 PM CDT FRI JUL 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL  703 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

SOUTHEAST NORTH DAKOTA..LA MOURE

AT 618 PM CDT A TORNADO WAS INDICATED 17 MILES NORTH OF
EDGELEY NORTH DAKOTA OR 22 MILES SOUTH OF JAMESTOWN
NORTH DAKOTA AND WAS MOVING EAST AT 32 MPH.

WHEN YOU ARE IN THE PATH OF A TORNADO..GO TO A BASEMENT
..IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON
THE LOWEST FLOOR. ABANDON CARS AND MOBILE HOMES..THEY OFFER
LITTLE PROTECTION FROM A TORNADO.

KS 2318Z

Nearby

Tornado 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.