Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 149, NWS Bismarck, ND

August 31, 1997Kidder County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 31, 1997, 4:43 PM CDT for Kidder County, North Dakota. It was in force for 62 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 31, 1997, 4:43 PM CDT (21:43 UTC)
Expired: Aug 31, 1997, 5:45 PM CDT
In force: 62 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Kidder County, ND

The radar

The Bismarck radar (KBIS), 78 km from the middle of the area, began a volume at 21:46 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 31, 4:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.7 hours before the alert went out and 74 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 312143 RRA
SVRBIS
NDC043-312245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
443 PM CDT SUN AUG 31 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL NORTH DAKOTA
 
   ...KIDDER COUNTY
 
AT 443 PM CDT BISMARCK DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM 45 MILES WEST OF JAMESTOWN...NEAR TAPPEN...TO 55
MILES NORTHWEST OF JAMESTOWN...NEAR ROBINSON...MOVING NORTHEAST
AT 25 MPH.
 
TOWNS IN THE PATH OF THE STORMS ARE CRYSTAL SPRINGS...PETTIBONE...AND
LAKE WILLIAMS.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
RL/TSW

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, 4:51 PM CDT	Tornado Warning	BIS	Stutsman	39 min
Aug 31, 5:27 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	63 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.