Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 170, NWS Bismarck, ND

September 15, 1997McLean County, Ward County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Sep 15, 1997, 11:36 PM CDT for McLean County, Ward County, North Dakota. It was in force for 69 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: Sep 15, 1997, 11:36 PM CDT (04:36 UTC)
Expired: Sep 16, 1997, 12:45 AM CDT
In force: 69 min
Issued by: NWS Bismarck, ND
Area: Whole counties

Counties McLean County, ND, Ward County, ND

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 15, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.6 hours before the alert went out and 139 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: 353 J/kg
Mixed-layer CIN: -297 J/kg
Mixed-layer LCL: 1197 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 282 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 160436 RRA
SVRBIS
NDC055-101-160545-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
1136 PM CDT MON SEP 15 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL NORTH DAKOTA
 
   ...MCLEAN COUNTY
 
IN NORTH CENTRAL NORTH DAKOTA
 
   ...WARD COUNTY
 
AT 1130 PM CDT DOPPLER WEATHER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS WITH DAMAGING WINDS FROM 55 MILES SOUTHWEST OF MINOT TO
40 MILES WEST OF MINOT MOVING NORTHEAST AT 35 MPH.
 
TOWNS NEAR THE PATH OF THESE THUNDERSTORMS INCLUDE BERTHOLD...DE LACS
MAX...GARRISON...RIVERDATLE...UNDERWOOD AND MINOT.
 
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

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 10:34 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	41 min
Sep 16, 12:13 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	47 min
Sep 16, 12:46 AM CDT	Severe Thunderstorm Warning	BIS	Sheridan	29 min
Sep 16, 12:54 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	66 min
Sep 16, 1:14 AM CDT	Severe Thunderstorm Warning	BIS	Pierce, Wells	46 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.