Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 94, NWS Bismarck, ND

July 18, 1997Adams County, Hettinger County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 18, 1997, 12:24 AM MDT for Adams County, Hettinger County, North Dakota. It was in force for 51 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: Jul 18, 1997, 12:24 AM MDT (06:24 UTC)
Expired: Jul 18, 1997, 1:15 AM MDT
In force: 51 min
Issued by: NWS Bismarck, ND
Area: Whole counties

Counties Adams County, ND, Hettinger County, ND

The radar

The Bismarck radar (KBIS), 144 km from the middle of the area, began a volume at 06:25 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
Jul 17, 11:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 6.4 hours before the alert went out and 148 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: 1566 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1879 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 180625 RRA
SVRBIS
NDC001-041-180715-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
124 AM CDT (1224 AM MDT) FRI JUL 18 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  215 AM CDT (115 AM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST NORTH DAKOTA
 
   ...EASTERN ADAMS COUNTY...EASTERN HETTINGER COUNTY
 
AT 1225 AM MDT A SEVERE THUNDERSTORM WAS LOCATED 40 MILES SOUTHEAST OF
DICKINSON JUST SOUTHWEST OF MOTT BUT ENCOMPASSED PORTIONS OF ADAMS AND
HETTINGER COUNTIES. THE STORM WAS MOVING NORTHEAST AT 30 MPH. TOWNS IN
THE PATH INCLUDE MOTT...BURT...AND BENTLEY.
 
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
DON'T DRIVE IHNTO AREAS WHERE WATER COVERS THE ROAD.
 
VINING/VAN ESS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 11:19 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie	56 min
Jul 17, 11:23 PM MDT	Severe Thunderstorm Warning	BIS	Golden Valley	52 min
Jul 17, 11:45 PM MDT	Severe Thunderstorm Warning	BIS	Billings	60 min
Jul 18, 1:05 AM MDT	Severe Thunderstorm Warning	BIS	Stark	55 min
Jul 18, 1:28 AM MDT	Severe Thunderstorm Warning	BIS	Hettinger	62 min
Jul 18, 2:02 AM MDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	58 min
Jul 18, 3:20 AM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	55 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.