Alert archive / North Dakota / Tornado Warnings in 2002

Tornado Warning 8, NWS Bismarck, ND

August 11, 2002Stutsman County, North Dakota

NWS Bismarck, ND issued this tornado warning at Aug 11, 2002, 3:53 PM CDT for Stutsman County, North Dakota. It was in force for 52 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 11, 2002, 3:53 PM CDT (20:53 UTC)
Expired: Aug 11, 2002, 4:45 PM CDT
In force: 52 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

County Stutsman County, ND

The radar

The Bismarck radar (KBIS), 126 km from the middle of the area, began a volume at 20:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 4:00 PM CDT	Tornado F4	Medina, ND
Aug 11, 4:20 PM CDT	Hail 1	Cleveland, 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
Aug 11, 1:55 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.9 hours before the alert went out and 121 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: 194 J/kg
Mixed-layer CIN: -368 J/kg
Mixed-layer LCL: 1960 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 423 m²/s²
0-3 km storm-relative helicity: 466 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

456 
WFUS53 KBIS 112053
TORBIS
NDC093-112145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
353 PM CDT SUN AUG 11 2002

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL STUTSMAN COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 445 PM CDT

* AT 353 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  POSSIBLE TORNADO FORMING 7 MILES NORTHWEST OF CLEVELAND...OR ABOUT 
  26 MILES WEST OF JAMESTOWN...MOVING NORTHEAST AT 20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  RURAL CENTRAL STUTSMAN COUNTY AT 410 PM CDT
  RURAL NORTHERN STUTSMAN COUNTY AT 440 PM CDT

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY
EVENING FOR EASTERN NORTH DAKOTA.

LAT...LON 4699 9938 4686 9919 4698 9878 4720 9898

RSL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 3:02 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	58 min
Aug 11, 3:41 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	64 min
Aug 11, 4:02 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	58 min
Aug 11, 4:50 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	55 min

Nearby

Tornado Warnings in North Dakota, 2002 Every tornado warning in 2002 Tornadoes in 2002

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; radar from the NEXRAD Level II archive.