Alert archive / North Dakota / Tornado Warnings in 1998

Tornado Warning 7, NWS Bismarck, ND

May 14, 1998Sheridan County, North Dakota

NWS Bismarck, ND issued this tornado warning at May 14, 1998, 5:27 PM CDT for Sheridan County, North Dakota. It was in force for 43 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: May 14, 1998, 5:27 PM CDT (22:27 UTC)
Expired: May 14, 1998, 6:10 PM CDT
In force: 43 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Sheridan County, ND

The radar

The Bismarck radar (KBIS), 95 km from the middle of the area, began a volume at 22:27 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
May 14, 5:55 PM CDT	Hail 1.75	Mcclusky, 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
May 14, 5:15 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.5 hours before the alert went out and 93 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: 635 J/kg
Mixed-layer CIN: -252 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

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

711 
WFUS1 KBIS 142230 RRA
TORBIS
NDC083-142310-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
527 PM CDT THU MAY 14 1998

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN SHERIDAN COUNTY IN CENTRAL NORTH DAKOTA

* UNTIL 610 PM CDT

* AT 520 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 49 MILES SOUTHEAST OF MINOT OR 8 MILES NORTH OF
  MCCLUSKY .. MOVING NORTHEAST 20 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  THE INTERSECTION OF HIGHWAY 14 AND SHEYENNE LAKE AT 600 PM CDT

IF YOU ARE IN A CAR...GO IN A NEARBY STURDY BUILDING AS A LAST
RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD.


REMEMBER... A TORNADO WATCH MEANS THAT TORNADOES ARE POSSIBLE IN
AND NEAR THE WATCH AREA. LARGE HAIL... DAMAGING WINDS... AND
TORRENTIAL RAINFALL MAY ALSO OCCUR. BE READY TO SEEK A PLACE OF
SAFETY IF A WARNING IS ISSUED FOR YOUR AREA.

LM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 7:20 PM CDT	Tornado Warning	BIS	Morton	45 min
May 13, 7:51 PM CDT	Severe Thunderstorm Warning	BIS	Oliver	64 min
May 13, 8:05 PM CDT	Tornado Warning	BIS	Morton	30 min
May 13, 8:31 PM CDT	Tornado Warning	BIS	Oliver	29 min
May 13, 8:48 PM CDT	Tornado Warning	BIS	Burleigh	47 min
May 13, 10:22 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer	48 min

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; radar from the NEXRAD Level II archive.