Alert archive / North Dakota / Tornado Watches in 2001

Tornado Watch 589

July 19, 2001Fallon County, Richland County, Wibaux County, Montana; 32 counties in North Dakota

The Storm Prediction Center issued this tornado watch at Jul 19, 2001, 5:00 PM MDT for Fallon County, Richland County, Wibaux County, Montana; 32 counties in North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 19, 2001, 5:00 PM MDT (23:00 UTC)
Expired
Jul 19, 2001, 11:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 35 counties

Fallon County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Benson County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Burleigh County, ND, Divide County, ND, Dunn County, ND, Emmons County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Towner County, ND, Ward County, ND, Wells County, ND, Williams County, ND

The radar

The Bismarck radar (KBIS), 154 km from the middle of the area, began a volume at 23:03 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

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

IssuedProductOfficeCountiesLasted
Jul 19, 5:00 PM MDTTornado WarningBISWard30 min
Jul 19, 6:41 PM MDTSevere Thunderstorm WarningBYZFallon64 min
Jul 19, 7:30 PM MDTTornado WarningBYZFallon30 min
Jul 19, 7:38 PM MDTTornado WarningGGWWibaux67 min
Jul 19, 7:59 PM MDTSevere Thunderstorm WarningBISAdams61 min
Jul 19, 8:08 PM MDTTornado WarningBISGolden Valley67 min
Jul 19, 9:00 PM MDTSevere Thunderstorm WarningBISGrant, Sioux60 min
Jul 19, 9:04 PM MDTSevere Thunderstorm WarningBISWilliams56 min
Jul 19, 9:16 PM MDTSevere Thunderstorm WarningBISMorton44 min
Jul 19, 9:23 PM MDTSevere Thunderstorm WarningBISWilliams57 min
Jul 19, 9:40 PM MDTSevere Thunderstorm WarningBISEmmons65 min
Jul 19, 9:41 PM MDTTornado WarningBISGrant, Morton34 min
Jul 19, 9:55 PM MDTSevere Thunderstorm WarningBISDunn65 min
Jul 19, 9:59 PM MDTSevere Thunderstorm WarningBISBurleigh, Morton, Oliver61 min
Jul 19, 10:02 PM MDTSevere Thunderstorm WarningBISBurke, Mountrail58 min
Jul 19, 10:26 PM MDTSevere Thunderstorm WarningBISKidder, Logan64 min
Jul 19, 10:42 PM MDTSevere Thunderstorm WarningBISMcKenzie58 min
Jul 19, 10:44 PM MDTSevere Thunderstorm WarningBISBurleigh, McLean46 min
Jul 19, 10:44 PM MDTSevere Thunderstorm WarningBISKidder46 min
Jul 19, 11:00 PM MDTSevere Thunderstorm WarningBISMountrail60 min

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 159 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 12:00Z on 2001-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 127 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 12:00Z on 2001-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 square meters per square second.193958Sfc1 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
127 J/kg
Mixed-layer CIN
-567 J/kg
Mixed-layer LCL
1721 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
-7 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.

961 
WWUS9 KMKC 192247
SEL9  
MKC WW 192241
MTZ000-NDZ000-200500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 589
STORM PREDICTION CENTER NORMAN OK
441 PM MDT THU JUL 19 2001

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   EASTERN MONTANA                            
   WESTERN AND CENTRAL NORTH DAKOTA                       

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
1100 PM MDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 125 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES WEST OF LEMMON SOUTH DAKOTA TO 50 MILES
NORTH OF MINOT NORTH DAKOTA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 587.  WATCH NUMBER 587 WILL NOT BE IN EFFECT AFTER 500 PM
MDT.

DISCUSSION...SUPERCELLS EXPECTED TO CONTINUE TO DEVELOP ALONG AND
E OF NNE/SSW CONFLUENCE ZONE OVER ERN MT/WRN ND THIS EVENING.  DEEP
SHEAR AND LARGE SCALE ASCENT MAY BE ENHANCED BY MID/HIGH LEVEL
SPEED MAX MOVING NE TOWARD REGION FROM NE WY.  ACTIVITY COULD 
CONSOLIDATE INTO A SQUALL LINE/BOW COMPLEX LATER TONIGHT...WITH
HIGH WINDS/LARGE HAIL.  

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 24035.

...CORFIDI

485,0983 455,1001 455,1052 485,1040

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 1:30 PM MDTTornado WatchSPCCarter, Custer, Dawson, Fallon, Powder River, Prairie and 3 more5 hr
Jul 18, 7:45 PM MDTSevere Thunderstorm WatchSPCAdams, Billings, Bowman, Burleigh, Grant, Hettinger and 6 more5 hr
Jul 18, 7:45 PM MDTSevere Thunderstorm WatchSPCAdams, Billings, Bowman, Burleigh, Grant, Hettinger and 6 more5 hr
Jul 18, 9:00 PM MDTSevere Thunderstorm WatchSPCBarnes, Cass, Dickey, Emmons, Kidder, LaMoure and 5 more5 hr
Jul 19, 2:00 AM MDTSevere Thunderstorm WatchSPCBarnes, Cass, Dickey, LaMoure, Logan, McIntosh and 3 more5 hr

Nearby

Tornado Watches in North Dakota, 2001Tornado Watches in Montana, 2001Every tornado watch in 2001

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.