Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 50, NWS Bismarck, ND

June 29, 1997McHenry County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 29, 1997, 12:33 AM CDT for McHenry County, North Dakota. It was in force for 57 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: Jun 29, 1997, 12:33 AM CDT (05:33 UTC)
Expired: Jun 29, 1997, 1:30 AM CDT
In force: 57 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County McHenry County, ND

What was reported inside it

Time	Report	Where	Remark
Jun 29, 1:05 AM CDT	Hail 1	Towner, 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
Jun 28, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.6 hours before the alert went out and 163 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: 547 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 2546 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 25 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

771 
WUUS1 KBIS 290532 RRA
SVRBIS
NDC049-290630-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
1233 AM CDT SUN JUN 29 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  130 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL NORTH DAKOTA
 
   ...EASTERN MCHENRY COUNTY
 
AT 1230 AM CDT WEATHER SERVICE RADARS INDICATED A CLUSTER OF SEVERE
THUNDERSTORMS CENTERED 35 MILES NORTHEAST OF MINOT OR 10 MILES NORTHWEST
OF TOWNER.
 
MOVEMENT WAS SOUTHEAST 10 TO 15 MPH.
 
TOWNER AND DENBIGH ARE IN THE PATH OF THESE STORMS. YOU CAN EXPECT
FLOODING OF LOW LYING AREAS...LARGE HAIL AND STRONG DAMAGING WINDS.
 
THIS SEVERE THUNDERSTORM WARNING REPLACES THE TORNADO WARNING THAT WAS
IN EFFECT FOR CENTRAL MCHENRY COUNTY.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
TWH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 9:32 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	43 min
Jun 28, 10:07 PM CDT	Tornado Warning	BIS	Bottineau, McHenry	53 min
Jun 28, 11:06 PM CDT	Severe Thunderstorm Warning	BIS	McHenry	69 min
Jun 28, 11:17 PM CDT	Tornado Warning	BIS	McHenry	28 min
Jun 28, 11:46 PM CDT	Tornado Warning	BIS	McHenry	44 min
Jun 29, 12:16 AM CDT	Severe Thunderstorm Warning	BIS	Stark	59 min
Jun 29, 12:32 AM CDT	Severe Thunderstorm Warning	BIS	McKenzie	58 min
Jun 29, 2:06 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	69 min
Jun 29, 4:45 PM CDT	Severe Thunderstorm Warning	BIS	Williams	60 min
Jun 29, 6:04 PM CDT	Severe Thunderstorm Warning	BIS	Williams	56 min
Jun 29, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Williams	64 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1997 Every severe thunderstorm warning in 1997

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.