Alert archive / North Dakota / Tornado Warnings in 2001

Tornado Warning 5, NWS Bismarck, ND

July 5, 2001Williams County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 5, 2001, 10:58 PM CDT for Williams County, North Dakota. It was in force for 62 min. 3 reports 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, 2001, 10:58 PM CDT (03:58 UTC)
Expired: Jul 6, 2001, 12:00 AM CDT
In force: 62 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Williams County, ND

What was reported inside it

Time	Report	Where	Remark
Jul 5, 10:58 PM CDT	Tornado F0	Williston, ND	Briefly touched down in open country.
Jul 5, 10:58 PM CDT	Thunderstorm Wind 57 M	(Isn)Sloulin Fld Wil, ND
Jul 5, 11:35 PM CDT	Hail 0.75	(Isn)Sloulin Fld Wil, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 5, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.0 hours before the alert went out and 231 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: 2576 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 2345 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KBIS 060359
TORISN

NDC105-060500-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WILLISTON ND
1058 PM CDT THU JUL 5 2001

THE NATIONAL WEATHER SERVICE IN WILLISTON HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN WILLIAMS COUNTY IN NORTHWESTERN NORTH DAKOTA

* UNTIL MIDNIGHT CDT

* AT 1055 PM CDT... SPOTTERS INDICATED A TORNADO 5 MILES WEST OF
  WILLISTON... MOVING EAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  WILLISTON 1100 PM CDT

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!

THOMSON


&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 10:37 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	63 min
Jul 5, 11:27 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	63 min
Jul 5, 11:44 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	46 min
Jul 5, 11:50 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley	55 min

Nearby

Tornado Warnings in North Dakota, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.