Alert archive / North Dakota / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 596

July 10, 199728 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 1997, 7:45 PM CDT for 28 counties in North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 10, 1997, 7:45 PM CDT (00:45 UTC)
Expired
Jul 11, 1997, 2:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 28 counties

Benson County, ND, Bottineau County, ND, Burleigh County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Stutsman County, ND, Towner County, ND, Ward County, ND, Wells County, ND

The radar

The Minot AFB radar (KMBX), 105 km from the middle of the area, began a volume at 00:45 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.

Warnings issued inside it

16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 10, 8:00 PM CDTSevere Thunderstorm WarningBISMcLean, Mercer60 min
Jul 10, 8:25 PM CDTSevere Thunderstorm WarningBISGrant, Sioux65 min
Jul 10, 8:41 PM CDTTornado WarningBISMercer34 min
Jul 10, 8:51 PM CDTSevere Thunderstorm WarningBISMorton54 min
Jul 10, 8:52 PM CDTSevere Thunderstorm WarningBISMountrail, Ward68 min
Jul 10, 9:09 PM CDTSevere Thunderstorm WarningBISBottineau, Renville66 min
Jul 10, 9:15 PM CDTTornado WarningBISWard30 min
Jul 10, 9:25 PM CDTSevere Thunderstorm WarningBISBurleigh, Morton65 min
Jul 10, 9:49 PM CDTSevere Thunderstorm WarningBISBottineau, McHenry56 min
Jul 10, 9:51 PM CDTSevere Thunderstorm WarningBISMcLean, Mercer69 min
Jul 10, 9:57 PM CDTTornado WarningBISMcHenry33 min
Jul 10, 10:10 PM CDTSevere Thunderstorm WarningBISSioux50 min
Jul 10, 10:50 PM CDTSevere Thunderstorm WarningBISMcHenry, Pierce40 min
Jul 10, 10:50 PM CDTSevere Thunderstorm WarningBISEmmons40 min
Jul 10, 11:29 PM CDTSevere Thunderstorm WarningBISPierce, Rolette46 min
Jul 11, 12:01 AM CDTSevere Thunderstorm WarningBISStutsman44 min

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.8 hours before the alert went out and 119 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.

679 
WWUS9 KMKC 110016
SEL6  
MKC WW 110016
NDZ000-110700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 596
STORM PREDICTION CENTER NORMAN OK
716 PM CDT THU JUL 10 1997

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CENTRAL NORTH DAKOTA                       

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 745 PM UNTIL
200 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 90 STATUTE MILES
EAST AND WEST OF A LINE FROM 60 MILES NORTHEAST OF MINOT NORTH
DAKOTA TO 65 MILES SOUTH SOUTHEAST OF BISMARCK NORTH DAKOTA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 593...WW 594...WW 595...

DISCUSSION...LINE OF SEVERE THUNDERSTORMS MOVING ALONG DRY LINE
INTO VERY UNSTABLE AIR WHERE CAPES ABOVE 4000 J/KG. 30 KT LOW LEVEL
JET WITH WEAKER FLOW AT MID LEVELS INDICATES POTENTIAL FOR LARGE
HAIL AND DAMAGING WET DOWNBURSTS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.  MEAN STORM
MOTION VECTOR 24030.


...ROGASH

485,0982 455,0982 455,1020 485,1022

Nearby

Severe Thunderstorm Watches in North Dakota, 1997Every severe thunderstorm watch 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.