Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 72, NWS Bismarck, ND

July 10, 1997Grant County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 10, 1997, 7:25 PM MDT for Grant County, Sioux County, North Dakota. It was in force for 65 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 10, 1997, 7:25 PM MDT (01:25 UTC)
Expired
Jul 10, 1997, 8:30 PM MDT
In force
65 min
Issued by
NWS Bismarck, ND
Area
Whole counties

Counties Grant County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 74 km from the middle of the area, began a volume at 01:27 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.

IssuedProductOfficeLasted
Jul 10, 6:45 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.4 hours before the alert went out and 77 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1997-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4434 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 1997-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
4434 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1269 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
176 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 110125 RRA
SVRBIS
NDC037-085-110230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
825 PM CDT (725 PM MDT) THU JUL 10 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 PM CDT (830 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL NORTH DAKOTA
 
   ...GRANT COUNTY...WESTERN SIOUX COUNTY
 
AT 820 PM CDT (720 PM MDT) RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM 55 MILES SOUTHWEST OF BISMARCK TO 70 MILES SOUTHWEST
OF BISMARCK NEAR THE TOWN OF MORRISTOWN SOUTH DAKOTA. THE LINE IS
MOVING NORTHEAST AT 20 MPH.
 
TOWNS IN OR NEAR THE PATH OF THIS LINE ARE ELGIN...NEW LEIPZIG...HEIL ANLEITH.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
HINTZ

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 6:11 PM MDTSevere Thunderstorm WarningBISDunn64 min
Jul 10, 6:45 PM MDTSevere Thunderstorm WarningBISBurke, Mountrail60 min
Jul 10, 7:00 PM MDTSevere Thunderstorm WarningBISMcLean, Mercer60 min
Jul 10, 7:41 PM MDTTornado WarningBISMercer34 min
Jul 10, 7:51 PM MDTSevere Thunderstorm WarningBISMorton54 min
Jul 10, 7:52 PM MDTSevere Thunderstorm WarningBISMountrail, Ward68 min
Jul 10, 8:09 PM MDTSevere Thunderstorm WarningBISBottineau, Renville66 min
Jul 10, 8:15 PM MDTTornado WarningBISWard30 min
Jul 10, 8:25 PM MDTSevere Thunderstorm WarningBISBurleigh, Morton65 min
Jul 10, 8:49 PM MDTSevere Thunderstorm WarningBISBottineau, McHenry56 min
Jul 10, 8:51 PM MDTSevere Thunderstorm WarningBISMcLean, Mercer69 min
Jul 10, 8:57 PM MDTTornado WarningBISMcHenry33 min
Jul 10, 9:10 PM MDTSevere Thunderstorm WarningBISSioux50 min
Jul 10, 9:50 PM MDTSevere Thunderstorm WarningBISMcHenry, Pierce40 min
Jul 10, 9:50 PM MDTSevere Thunderstorm WarningBISEmmons40 min
Jul 10, 10:29 PM MDTSevere Thunderstorm WarningBISPierce, Rolette46 min
Jul 10, 11:01 PM MDTSevere Thunderstorm WarningBISStutsman44 min
Jul 11, 3:31 PM MDTSevere Thunderstorm WarningBISRenville, Ward44 min
Jul 11, 3:54 PM MDTSevere Thunderstorm WarningBISBurke66 min
Jul 11, 5:23 PM MDTSevere Thunderstorm WarningBISMcLean, Oliver67 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1997Every 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.