Alert archive / Minnesota / Tornado Watches in 2004

Tornado Watch 190

May 11, 200410 counties in Minnesota; 7 counties in North Dakota

The Storm Prediction Center issued this tornado watch at May 11, 2004, 7:00 PM CDT for 10 counties in Minnesota; 7 counties in North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2004, 7:00 PM CDT (00:00 UTC)
Expired
May 12, 2004, 1:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Mahnomen County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Barnes County, ND, Cass County, ND, Grand Forks County, ND, Griggs County, ND, Ransom County, ND, Steele County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 36 km from the middle of the area, began a volume at 00:03 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

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

IssuedProductOfficeCountiesLasted
May 11, 7:09 PM CDTSevere Thunderstorm WarningFGFMarshall, Pennington51 min
May 11, 7:14 PM CDTTornado WarningFGFBecker, Otter Tail46 min
May 11, 7:31 PM CDTTornado WarningFGFClay, Wilkin44 min
May 11, 7:32 PM CDTSevere Thunderstorm WarningFGFRed Lake28 min
May 11, 7:44 PM CDTSevere Thunderstorm WarningFGFGriggs46 min
May 11, 7:59 PM CDTTornado WarningFGFBecker, Otter Tail46 min
May 11, 8:00 PM CDTSevere Thunderstorm WarningFGFMarshall, Pennington60 min
May 11, 8:02 PM CDTSevere Thunderstorm WarningFGFRed Lake58 min
May 11, 8:13 PM CDTSevere Thunderstorm WarningFGFBarnes47 min
May 11, 8:14 PM CDTSevere Thunderstorm WarningFGFPolk31 min
May 11, 8:16 PM CDTSevere Thunderstorm WarningFGFClay, Wilkin44 min
May 11, 8:19 PM CDTSevere Thunderstorm WarningFGFGrand Forks56 min
May 11, 8:32 PM CDTSevere Thunderstorm WarningFGFGriggs58 min
May 11, 8:45 PM CDTTornado WarningFGFBecker, Otter Tail45 min
May 11, 8:58 PM CDTSevere Thunderstorm WarningFGFMarshall, Pennington, Red Lake62 min
May 11, 9:04 PM CDTSevere Thunderstorm WarningFGFTraill41 min
May 11, 9:15 PM CDTSevere Thunderstorm WarningFGFGrand Forks45 min
May 11, 9:25 PM CDTSevere Thunderstorm WarningFGFPolk50 min
May 11, 9:29 PM CDTSevere Thunderstorm WarningFGFBecker, Hubbard46 min
May 11, 9:30 PM CDTSevere Thunderstorm WarningFGFSteele45 min
May 11, 9:38 PM CDTSevere Thunderstorm WarningFGFNorman52 min
May 11, 9:40 PM CDTSevere Thunderstorm WarningFGFBarnes, Ransom, Sargent35 min
May 11, 9:44 PM CDTSevere Thunderstorm WarningFGFTraill61 min
May 11, 9:57 PM CDTSevere Thunderstorm WarningFGFGrand Forks48 min
May 11, 10:31 PM CDTSevere Thunderstorm WarningFGFTraill44 min
May 11, 10:38 PM CDTSevere Thunderstorm WarningFGFCass37 min
May 11, 10:39 PM CDTSevere Thunderstorm WarningFGFPolk51 min
May 11, 10:44 PM CDTSevere Thunderstorm WarningFGFTraill61 min
May 11, 11:35 PM CDTSevere Thunderstorm WarningFGFNorman40 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.0 hours before the alert went out and 292 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 2004-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLEL10008507005003002001001 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 2004-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 square meters per square second.19395878Sfc1 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
10 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
500 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 112359
SEL0  
SPC WW 120000
MNZ000-NDZ000-120600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 190
NWS STORM PREDICTION CENTER NORMAN OK
700 PM CDT TUE MAY 11 2004

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

       NORTHWEST MINNESOTA
       EAST CENTRAL NORTH DAKOTA

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 700 PM
UNTIL 100 AM CDT.

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 60 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 75 MILES WEST OF FARGO NORTH DAKOTA TO 10
MILES EAST NORTHEAST OF BEMIDJI MINNESOTA.

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...CONTINUE...WW 185...WW 186...WW 187...WW
188...WW 189...

DISCUSSION...VERY STRONG BOUNDARY EXTENDS EAST-WEST ACROSS SERN ND
INTO W CENTRAL MN WITH A VERY STRONG THERMAL GRADIENT. VERY STRONG
LOW LEVEL JET EXTENDS NWD INTO THIS AREA COUPLED WITH WLY MID LEVEL
FLOW HAS CREATED FAVORABLE SHEAR.  AIR MASS SOUTH OF THE BOUNDARY IS
VERY UNSTABLE WITH CAPE TO 2500 J/KG...AND BRN SHEAR IS ABOVE 100
M2/S2 RIGHT OVER THE BOUNDARY SUPPORTING SUPERCELL STORMS.

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 500.
MEAN STORM MOTION VECTOR 22035.


...MCCARTHY

474,0982 482,0944 464,0944 460,0982

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 7:22 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Cass, Clearwater, Hubbard, Mahnomen113 min
May 11, 8:45 PM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Big Stone, Cass, Clay, Clearwater and 15 more5 hr
May 11, 10:08 PM CDTMesoscale DiscussionSPCBig Stone, Grant, Lac qui Parle, Lincoln, Lyon, Otter Tail and 6 more2 hr
May 12, 11:29 AM CDTMesoscale DiscussionSPCDakota, Dodge, Fillmore, Freeborn, Goodhue, Houston and 6 more2 hr
May 12, 12:20 PM CDTSevere Thunderstorm WatchSPCDodge, Fillmore, Freeborn, Goodhue, Houston, Mower and 4 more6 hr
May 12, 2:22 PM CDTMesoscale DiscussionSPCChisago, Dakota, Dodge, Fillmore, Freeborn, Goodhue and 9 more83 min
May 12, 3:37 PM CDTMesoscale DiscussionSPCDakota, Dodge, Fillmore, Freeborn, Goodhue, Houston and 7 more83 min

Nearby

Tornado Watches in Minnesota, 2004Tornado Watches in North Dakota, 2004Every tornado watch in 2004

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.