Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 150, NWS Bismarck, ND

August 31, 1997Stutsman County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 31, 1997, 5:27 PM CDT for Stutsman County, North Dakota. It was in force for 63 min. 4 reports 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: Aug 31, 1997, 5:27 PM CDT (22:27 UTC)
Expired: Aug 31, 1997, 6:30 PM CDT
In force: 63 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Stutsman County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 138 km from the middle of the area, began a volume at 22:29 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
Aug 31, 5:35 PM CDT	Hail 4.5	Windsor, ND	property damage estimated
Aug 31, 5:50 PM CDT	Tornado F0	Eldridge, ND	brief touchdown
Aug 31, 6:20 PM CDT	Hail 4.5	Jamestown, ND	hail fell in Jamestown for 70 minutes, with hail ranging in size from marble to softball. Extensive damage done
Aug 31, 6:40 PM CDT	Tornado F0	Jamestown, ND	brief touchdown near the Buffalo mall

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
Aug 31, 4:30 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 134 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: 2 J/kg
Mixed-layer CIN: -416 J/kg
Mixed-layer LCL: 1991 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 333 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 312227 RRA
SVRBIS
NDC093-312330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
527 PM CDT SUN AUG 31 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL NORTH DAKOTA
 
   ...STUTSMAN COUNTY
 
AT 525 PM CDT A LARGE CLUSTER OF SEVERE THUNDERSTORMS WERE LOCATED FROM
35 MILES NORTH OF JAMESTOWN TO 25 MILES WEST OF JAMESTOWN NEAR WINDSOR.
THE STORMS ARE NOW MOVING EAST AT 25 MPH. TOWNS IN OR NEAR THE PATH
INCLUDE WINDSOR...BUCHANAN AND JAMESTOWN.
 
AT 505 PM CDT 2 INCH HAIL WAS REPORTED AT MEDINA.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
 
LEBLANG/HINTZ
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 4:35 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	55 min
Aug 31, 4:43 PM CDT	Severe Thunderstorm Warning	BIS	Kidder	62 min
Aug 31, 4:51 PM CDT	Tornado Warning	BIS	Stutsman	39 min
Aug 31, 5:43 PM CDT	Severe Thunderstorm Warning	BIS	Foster	47 min
Aug 31, 5:55 PM CDT	Tornado Warning	BIS	Stutsman	35 min
Aug 31, 6:28 PM CDT	Tornado Warning	BIS	Stutsman	32 min
Aug 31, 6:39 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	51 min
Aug 31, 6:58 PM CDT	Tornado Warning	BIS	Stutsman	17 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.