Alert archive / Minnesota / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 615

July 24, 200018 counties in Minnesota; 16 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 24, 2000, 4:00 PM CDT for 18 counties in Minnesota; 16 counties in North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 24, 2000, 4:00 PM CDT (21:00 UTC)
Expired: Jul 24, 2000, 10:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 34 counties

Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 42 km from the middle of the area, began a volume at 21:00 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 nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.0 hours before the alert went out and 269 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: 959 J/kg
Mixed-layer CIN: -282 J/kg
Mixed-layer LCL: 1002 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

302 
WWUS9 KMKC 242033
SEL5  

SEL5  
MKC WW 242028
MNZ000-NDZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 615
STORM PREDICTION CENTER NORMAN OK
328 PM CDT MON JUL 24 2000

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

   NORTHWESTERN MINNESOTA                          
   EASTERN NORTH DAKOTA                       

EFFECTIVE THIS MONDAY 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 95 STATUTE MILES
EAST AND WEST OF A LINE FROM 65 MILES SOUTH OF FARGO NORTH DAKOTA
TO 65 MILES NORTH NORTHWEST OF THIEF RIVER FALLS 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.


DISCUSSION...COLD FRONT AND UPPER SHORT WAVE APPROACHING
MOISTURE/INSTABILITY AXIS OVER WATCH AREA WITH CAPE VALUES
EXCEEDING 3000 J/KG. DESPITE SOME WEAKNESS IN MID LEVEL WIND
FLOW...VEERING WIND PROFILES WILL SUPPORT A FEW SUPERCELLS WITH
LARGE HAIL AND DAMAGING DOWNDRAFTS THE PRIMARY THREAT.

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 27035.

...ROGASH

485,0943 455,0945 455,0984 485,0984

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 5:30 PM CDT	Tornado Watch	SPC	Big Stone, Traverse	6 hr
Jul 23, 9:00 PM CDT	Severe Thunderstorm Watch	SPC	Billings, Burke, Divide, McKenzie, Mountrail, Williams	5 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2000 Severe Thunderstorm Watches in North Dakota, 2000 Every severe thunderstorm watch in 2000

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.