Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 53, NWS Bismarck, ND

June 29, 1997Williams County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 29, 1997, 6:04 PM CDT for Williams County, North Dakota. It was in force for 56 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: Jun 29, 1997, 6:04 PM CDT (23:04 UTC)
Expired: Jun 29, 1997, 7:00 PM CDT
In force: 56 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Williams County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.1 hours before the alert went out and 272 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: 25 J/kg
Mixed-layer CIN: -326 J/kg
Mixed-layer LCL: 1908 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

407 
WUUS1 KISN 292306 RRA
SVRISN
NDC105-300000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILLISTON ND
604 PM CDT SUN JUN 29 1997
 
THE NATIONAL WEATHER SERVICE IN WILLISTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST NORTH DAKOTA
 
   ...WESTERN WILLIAMS COUNTY
 
AT 6 PM CDT WILLISTON WEATHER RADAR SHOWED AN AREA OF STRONG
THUNDERSTORMS MOVING TO THE EAST FROM OUT OF MONTANA. THESE STORMS HAVE
PRODUCED PENNY TO QUARTER SIZED HAIL AS THEY MOVED ACROSS EASTERN
MONTANA. MOVEMENT HAS BEEN AT A RATE OF 10 TO 15 MPH. TOWNS THAT WILL BE
IN THE PATH OF THIS STORM
INCLUDE...WILLISTON...MARMON...BONETRAIL...TRENTON AND BUFORD.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
 
CHAPMAN
 
&

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, 12:33 AM CDT	Severe Thunderstorm Warning	BIS	McHenry	57 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, 6:56 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; the sounding from the Mesonet's radiosonde archive.