Alert archive / North Dakota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 60, NWS Grand Forks, ND

June 6, 2004Nelson County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 6, 2004, 11:30 PM CDT for Nelson County, North Dakota. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 6, 2004, 11:30 PM CDT (04:30 UTC)
Expired: Jun 7, 2004, 12:15 AM CDT
In force: 45 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Nelson County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 82 km from the middle of the area, began a volume at 04:31 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.

What was reported inside it

Time	Report	Where	Remark
Jun 6, 11:35 PM CDT	HAIL 1.75	2 W Tolna, ND
Jun 6, 11:35 PM CDT	HAIL 1.75	2 W Tolna, ND

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 5 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 6, 8:50 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.5 hours before the alert went out and 221 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: 1945 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1573 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 9.1

Open this sounding in Storm Lab

The text

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

602 
WUUS53 KFGF 070430
SVRFGF
NDC063-070515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1129 PM CDT SUN JUN 6 2004

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NELSON COUNTY IN NORTHEAST NORTH DAKOTA

* UNTIL 1215 AM CDT.

* AT 1127 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES WEST OF TOLNA...OR ABOUT 25 MILES
  SOUTHEAST OF DEVILS LAKE...MOVING TO THE EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  TOLNA AT 1130 PM...
  PEKIN AT 1140 PM...
  MCVILLE AT 1150 PM AND
  KLOTEN AT MIDNIGHT.

DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL
POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED
BUILDING IMMEDIATELY.

LAT...LON 4801 9851 4770 9852 4769 9793 4803 9791

$$

JH/GV

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

Hazardous weather outlook, Jun 6, 6:34 AM CDT, 16 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
634 AM CDT SUN JUN 6 2004

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-061433-
BARNES-BENSON-CASS-CAVALIER-CLAY-EAST BECKER-EAST MARSHALL-
EAST OTTER TAIL-EAST POLK-EASTERN WALSH COUNTY-EDDY-GRAND FORKS-
GRANT-GRIGGS-HUBBARD-KITTSON-LAKE OF THE WOODS-MAHNOMEN-NELSON-
NORMAN-NORTH BELTRAMI-NORTH CLEARWATER-PEMBINA-PENNINGTON-RAMSEY-
RANSOM-RED LAKE-RICHLAND-ROSEAU-SARGENT-SOUTH BELTRAMI-
SOUTH CLEARWATER-STEELE-TOWNER-TRAILL-WADENA-WEST BECKER-
WEST MARSHALL-WEST OTTER TAIL-WEST POLK-WESTERN WALSH COUNTY-WILKIN-
634 AM CDT SUN JUN 6 2004

...A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF EASTERN NORTH
DAKOTA AND NORTHWEST MINNESOTA OVERNIGHT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NORTH DAKOTA...WEST
CENTRAL AND NORTHWEST MINNESOTA.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF
EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA DURING THE LATE EVENING
AND OVERNIGHT HOURS. LARGE HAIL AND DAMAGING WINDS ARE THE MAIN
THREAT. STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER WESTERN
NORTH DAKOTA LATE THIS AFTERNOON AND SHIFT EAST REACHING THE
DEVILS LAKE BASIN DURING THE MID TO LATE EVENING HOURS...THEN ACROSS
THE RED RIVER VALLEY INTO NORTHWEST MINNESOTA AFTER MIDNIGHT. THE
FAVORED AREA FOR SEVERE THUNDERSTORMS WILL BE ALONG AND NORTH OF A
LINE FROM COOPERSTOWN TO MAYVILLE AND BEMIDJI. IN ADDITION LOCALLY
HEAVY RAINFALL IS ALSO POSSIBLE...ESPECIALLY FROM THE NORTHERN RED
RIVER VALLEY INTO NORTHWEST MINNESOTA.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

STRONG THUNDERSTORMS ARE POSSIBLE ACROSS NORTHERN MINNESOTA MONDAY
MORNING BEFORE SHIFTING NORTHEAST IN SOUTHERN CANADA.  THUNDERSTORMS
MAY REDEVELOP MONDAY AFTERNOON ALONG AND EAST OF A LINE FROM ROSEAU
TO DETROIT LAKES AND ELBOW LAKE BEFORE SHIFTING EAST EARLY IN THE
EVENING.  THE NEXT CHANCE FOR STRONG THUNDERSTORMS WILL BE THURSDAY
AND THURSDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FROM THIS EVENING INTO MONDAY
MORNING.

VOELKER

In the hours before

Local storm report, Jun 6, 10:52 PM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1052 PM CDT SUN JUN 06 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

1045 PM     HAIL             5 N NEW ROCKFORD        47.75N 99.14W
06/06/2004  0.88 INCH        EDDY               ND   TRAINED SPOTTER

&&

WJB

Local storm report, Jun 6, 11:00 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1100 PM CDT SUN JUN 06 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

1052 PM     HAIL             2 S SHEYENNE            47.80N 99.12W
06/06/2004  2.50 INCH        EDDY               ND   EMERGENCY MNGR

&&

WJB

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 10:08 PM CDT	Severe Thunderstorm Warning	FGF	Benson	52 min
Jun 6, 10:43 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	47 min
Jun 6, 11:22 PM CDT	Severe Thunderstorm Warning	FGF	Towner	38 min
Jun 7, 1:00 AM CDT	Severe Thunderstorm Warning	FGF	Nelson, Ramsey	45 min
Jun 7, 1:10 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	50 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2004 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.