Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 66, NWS Bismarck, ND

July 10, 1997Billings County, Golden Valley County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 10, 1997, 4:13 PM MDT for Billings County, Golden Valley County, North Dakota. It was in force for 62 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: Jul 10, 1997, 4:13 PM MDT (22:13 UTC)
Expired: Jul 10, 1997, 5:15 PM MDT
In force: 62 min
Issued by: NWS Bismarck, ND
Area: Whole counties

Counties Billings County, ND, Golden Valley County, ND

The radar

The Bismarck radar (KBIS), 218 km from the middle of the area, began a volume at 22:15 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
Jul 10, 4:38 PM MDT	Hail 2	Medora, 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.2 hours before the alert went out and 223 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: 930 J/kg
Mixed-layer CIN: -333 J/kg
Mixed-layer LCL: 1194 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 79 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.

000 
TTAA00 KBIS 102213 RRA
SVRBIS
NDC007-033-102315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
513 PM CDT (413 PM MDT) THU JUL 10 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  615 PM CDT (515 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL NORTH DAKOTA
 
   ...SOUTHERN BILLINGS COUNTY...SOUTHERN GOLDEN VALLEY COUNTY
 
AT 410 PM MDT RADAR INDICATED 2 SEVERE THUNDERSTORMS IN SOUTHWESTERN
NORTH DAKOTA. THE FIRST STORM WAS 40 MILES WEST OF DICKINSON OR 10 MILES
SOUTHWEST OF MEDORA.
 
THE SECOND STORM WAS 45 MILES SOUTHWEST OF DICKINSON OR 20 MILES
SOUTHWEST OF MEDORA.
 
BOTH STORMS WERE MOVING NORTHEAST AT 10 MPH.
 
MEDORA IS IN THE PATH OF THESE STORMS.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 N
HINTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 5:15 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Slope	45 min
Jul 10, 5:31 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie	59 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; radar from the NEXRAD Level II archive.