Alert archive / North Dakota / Tornado Warnings in 1998

Tornado Warning 18, NWS Bismarck, ND

July 5, 1998Burke County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 5, 1998, 6:55 PM CDT for Burke County, North Dakota. It was in force for 50 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 5, 1998, 6:55 PM CDT (23:55 UTC)
Expired: Jul 5, 1998, 7:45 PM CDT
In force: 50 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Burke County, ND

What was reported inside it

Time	Report	Where	Remark
Jul 5, 7:00 PM CDT	Tornado F0	Portal, ND	Tornado formed in Canada and moved south into the US. multiple funnels were reported.

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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.9 hours before the alert went out and 263 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: 154 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: -2 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.

766 
WFUS1 KBIS 052356 RRA
TORBIS
NDC013-060045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
655 PM CDT SUN JUL 5 1998

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  BURKE COUNTY IN NORTHWESTERN NORTH DAKOTA

* UNTIL 745 PM CDT

* AT 648 PM CDT... AREA LAW ENFORCEMENT INDICATED A TORNADO 75 MILES
  NORTHWEST OF MINOT...ON THE US BORDER AT PORTAL.... MOVING
  SOUTHEAST AT 15 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  PORTAL THROUGH 710 PM
  NORTHGATE AT 730 PM

A TORNADO IS ON THE GROUND GO TO THE BASEMENT IF A BASEMENT IS
NOT AVAILABLE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

WAA


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 10:50 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	60 min
Jul 4, 11:56 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	59 min
Jul 5, 1:15 AM CDT	Flash Flood Warning	BIS	Williams	3 hr
Jul 5, 1:30 AM CDT	Flash Flood Warning	BIS	Mountrail	3 hr

Nearby

Tornado Warnings in North Dakota, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.