Alert archive / North Dakota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 95, NWS Bismarck, ND

August 18, 1998Ward County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 18, 1998, 6:34 PM CDT for Ward County, North Dakota. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 18, 1998, 6:34 PM CDT (23:34 UTC)
Expired: Aug 18, 1998, 7:35 PM CDT
In force: 61 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Ward County, ND

The radar

The Minot AFB radar (KMBX), 54 km from the middle of the area, began a volume at 23:33 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.

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 18, 4:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.6 hours before the alert went out and 173 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: 1285 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 577 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 321 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

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

971 
WUUS1 KBIS 182337 RRA
SVRBIS
NDC009-075-101-190035-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
634 PM CDT TUE AUG 18 1998

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN BOTTINEAU COUNTY IN NORTH CENTRAL NORTH DAKOTA
  EXTREME SOUTHEASTERN RENVILLE COUNTY IN NORTH CENTRAL NORTH DAKOTA
  EASTERN WARD COUNTY IN NORTH CENTRAL NORTH DAKOTA

* UNTIL 735 PM CDT

* AT 630 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM FROM 45 MILES NORTH OF MINOT TO 10 MILES SOUTH
  OF MINOT... MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GLENBURN AT 640 PM CDT
  SURRY AT 640 PM CDT
  SAWYER AT 650 PM CDT
  MAXBASS AT 700 PM CDT

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS A TORNADO
WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

JP MARTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 4:04 AM CDT	Severe Thunderstorm Warning	BIS	Williams	46 min
Aug 18, 6:13 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau	47 min
Aug 18, 4:15 PM CDT	Severe Thunderstorm Warning	BIS	Morton	45 min
Aug 18, 5:00 PM CDT	Severe Thunderstorm Warning	BIS	Morton	35 min
Aug 18, 5:23 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail, Ward	47 min
Aug 18, 5:38 PM CDT	Tornado Warning	BIS	Mountrail	32 min
Aug 18, 5:49 PM CDT	Severe Thunderstorm Warning	BIS	Renville, Ward	41 min
Aug 18, 6:34 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Renville	61 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1998 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.