Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 91, NWS Bismarck, ND

July 18, 1997McKenzie County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 18, 1997, 12:19 AM CDT for McKenzie County, North Dakota. It was in force for 56 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, 12:19 AM CDT (05:19 UTC)
Expired: Jul 18, 1997, 1:15 AM CDT
In force: 56 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County McKenzie County, ND

The radar

The Minot AFB radar (KMBX), 202 km from the middle of the area, began a volume at 05:22 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 18, 12:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.3 hours before the alert went out and 230 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 KISN 180520 RRA
SVRISN
NDC053-180615-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE WILLISTON ND
1219 AM CDT FRI JUL 18 1997
 
THE NATIONAL WEATHER SERVICE IN WILLISTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL NORTH DAKOTA
 
   ...MCKENZIE COUNTY
 
AT 1210 AM CDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED IN
SOUTHWEST MCKENZIE COUNTY. THIS STORM WAS MOVING TO THE NORTHEAST AT 30
MPH. THE PATH OF THE OF THIS STORM WILL TAKE IT INTO CENTRAL MCKENZIE
COUNTY BY 1 AM CDT. THIS STORM HAS A HISTORY OF STRONG WIND GUSTS. A
WEATHER SPOTTER NEAR GLENDIVE MT. REPORTED A WIND GUST TO 60 MPH.
 
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 INTO AREAS WHERE WATER COVERS THE ROAD.
 
 
DEAL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 12:23 AM CDT	Severe Thunderstorm Warning	BIS	Golden Valley	52 min
Jul 18, 12:45 AM CDT	Severe Thunderstorm Warning	BIS	Billings	60 min
Jul 18, 1:24 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	51 min
Jul 18, 2:05 AM CDT	Severe Thunderstorm Warning	BIS	Stark	55 min
Jul 18, 2:28 AM CDT	Severe Thunderstorm Warning	BIS	Hettinger	62 min
Jul 18, 3:02 AM CDT	Severe Thunderstorm Warning	BIS	Hettinger, Stark	58 min
Jul 18, 4:20 AM CDT	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.