Alert archive / North Dakota / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 461

June 23, 200212 counties in Minnesota; 16 counties in North Dakota; 7 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2002, 4:00 PM CDT for 12 counties in Minnesota; 16 counties in North Dakota; 7 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 23, 2002, 4:00 PM CDT (21:00 UTC)
Expired: Jun 23, 2002, 10:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 35 counties

Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Lac qui Parle County, MN, Otter Tail County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sheridan County, ND, Stutsman County, ND, Wells County, ND, Brown County, SD, Campbell County, SD, Day County, SD, Grant County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 125 km from the middle of the area, began a volume at 21:19 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

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

Issued	Product	Office	Counties	Lasted
Jun 23, 7:24 PM CDT	Severe Thunderstorm Warning	ABR	McPherson	51 min
Jun 23, 7:37 PM CDT	Tornado Warning	ABR	Brown, McPherson	38 min
Jun 23, 8:12 PM CDT	Tornado Warning	ABR	Brown	48 min
Jun 23, 8:29 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	61 min
Jun 23, 8:55 PM CDT	Tornado Warning	ABR	Brown	50 min
Jun 23, 9:35 PM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	55 min

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.0 hours before the alert went out and 180 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: 201 J/kg
Mixed-layer CIN: -305 J/kg
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 232047
SEL1  
SPC WW 232044
MNZ000-NDZ000-SDZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 461
STORM PREDICTION CENTER NORMAN OK
344 PM CDT SUN JUN 23 2002

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

   WEST CENTRAL MINNESOTA                          
   CENTRAL AND SOUTHEAST NORTH DAKOTA                       
   NORTHEAST SOUTH DAKOTA                       

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 1000
PM 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 75 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 80 MILES WEST OF JAMESTOWN NORTH
DAKOTA TO 15 MILES SOUTH SOUTHEAST OF ALEXANDRIA MINNESOTA.

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.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...  CONTINUE...WW 459...WW 460...

DISCUSSION...SEVERE THUNDERSTORMS EXPECTED TO RAPIDLY DEVELOP
WITHIN THE NEXT 1-2 HOURS NEAR STATIONARY FRONT EXTENDING SE-NW
ACROSS THE REGION.  STRONG INSTABILITY AND LOW LEVEL ELY WINDS
NORTH OF THE FRONT WILL BE SUPPORTIVE OF SUPERCELLS...HOWEVER
PRIMARY SEVERE THREAT WILL BE FROM LARGE HAIL AND DAMAGING WINDS.


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 500.  MEAN STORM
MOTION VECTOR 25025.


...EVANS

480,1002 464,0951 443,0951 454,1002

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 22, 7:15 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Golden Valley, Hettinger, McKenzie and 2 more	5 hr
Jun 22, 10:30 PM CDT	Severe Thunderstorm Watch	SPC	Burleigh, Dunn, Emmons, Grant, Kidder, Logan and 8 more	5 hr
Jun 23, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 19 more	6 hr

Nearby

Severe Thunderstorm Watches in North Dakota, 2002 Severe Thunderstorm Watches in Minnesota, 2002 Severe Thunderstorm Watches in South Dakota, 2002 Every severe thunderstorm watch in 2002

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.