Alert archive / North Dakota / Tornado Warnings in 1986

Tornado Warning 9, NWS Bismarck, ND

July 29, 1986Oliver County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 29, 1986, 6:10 PM MDT for Oliver County, North Dakota. It was in force for 20 min. 1 report 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: Jul 29, 1986, 6:10 PM MDT (00:10 UTC)
Expired: Jul 29, 1986, 6:30 PM MDT
In force: 20 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Oliver County, ND

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

Time	Report	Where	Remark
Jul 29, 6:29 PM MDT	Hail 1.75	Oliver, ND

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

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.2 hours before the alert went out and 62 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1008 J/kg
Mixed-layer CIN: -191 J/kg
Mixed-layer LCL: 2590 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 300010
TORBIS
NDC065-300030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
710 PM CDT TUE JUL 29 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF


CENTRAL NORTH DAKOTA...OLIVER

AT 705 PM CDT RADAR AND HAM RADIO REPORTS INDICATED A ROTATING
CLOUD OVER THE CITY OF CENTER. PERSONS IN CENTER SHOULD TAKE
SHELTER IMMEDIATELY. THE STORM WAS MOVING TO THE EAST AT 15
MILES AN HOUR.
.
.

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.

KAS 0009Z

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 6:26 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh	49 min
Jul 29, 6:32 PM MDT	Severe Thunderstorm Warning	BIS	Rolette	43 min
Jul 29, 6:47 PM MDT	Severe Thunderstorm Warning	BIS	Morton	28 min
Jul 29, 7:14 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	46 min
Jul 29, 7:49 PM MDT	Severe Thunderstorm Warning	BIS	Benson, Eddy	26 min
Jul 29, 7:49 PM MDT	Severe Thunderstorm Warning	BIS	Ramsey, Towner	26 min
Jul 29, 8:01 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh	44 min
Jul 29, 8:28 PM MDT	Severe Thunderstorm Warning	BIS	Ramsey	32 min
Jul 29, 8:33 PM MDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	42 min

Nearby

Tornado Warnings in North Dakota, 1986 Every tornado warning in 1986 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.