Alert archive / Minnesota / Tornado Warnings in 2004

Tornado Warning 58, NWS Grand Forks, ND

August 29, 2004Polk County, Minnesota; Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Aug 29, 2004, 5:12 PM CDT for Polk County, Minnesota; Traill County, North Dakota. It was in force for 48 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: Aug 29, 2004, 5:12 PM CDT (22:12 UTC)
Expired: Aug 29, 2004, 6:00 PM CDT
In force: 48 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Polk County, MN, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 38 km from the middle of the area, began a volume at 22:13 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
Aug 29, 5:20 PM CDT	HAIL 1	8 Se Buxton, ND
Aug 29, 5:30 PM CDT	HAIL 1.25	2 N Nielsville, MN	MAJOR CROP DAMAGE REPORTED AS HAIL STRIPPED BARLEY, WHEAT AND CORN. HAIL FELL IN 2 MILE LONG PATH.

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

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 10.2 hours before the alert went out and 283 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: 10 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 718 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 68 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.

000 
WFUS53 KFGF 292212
TORFGF
MNC119-NDC097-292300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
512 PM CDT SUN AUG 29 2004

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...

  SOUTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA
  NORTHEASTERN TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 600 PM CDT.

* AT 507 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 4 MILES NORTHWEST OF
  NIELSVILLE...OR ABOUT 26 MILES SOUTH OF GRAND FORKS...MOVING TO THE
  EAST AT 20 MPH. SPOTTER ARE WATCHING THIS STORM AND IT SHOWS
  ROTATION.

* THE TORNADO WILL BE NEAR...

  NIELSVILLE AT 515 PM AND
  GREENVIEW AT 550 PM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN THE PATH OF THIS TORNADO
ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING.

LAT...LON 4765 9699 4747 9699 4753 9657 4769 9658

$$

55

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 4:18 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	42 min
Aug 29, 4:30 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	45 min
Aug 29, 4:58 PM CDT	Tornado Warning	FGF	Marshall	47 min
Aug 29, 5:05 PM CDT	Severe Thunderstorm Warning	FGF	Polk	40 min
Aug 29, 5:15 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	45 min
Aug 29, 5:32 PM CDT	Severe Thunderstorm Warning	FGF	Norman	43 min
Aug 29, 5:53 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	37 min
Aug 29, 5:55 PM CDT	Severe Thunderstorm Warning	FGF	Clay	50 min
Aug 29, 6:24 PM CDT	Severe Thunderstorm Warning	FGF	Wilkin	51 min
Aug 29, 6:33 PM CDT	Severe Thunderstorm Warning	FGF	Norman	27 min
Aug 29, 6:37 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	38 min
Aug 29, 6:44 PM CDT	Severe Thunderstorm Warning	FGF	Clay	46 min
Aug 29, 2:48 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	42 min
Aug 29, 4:06 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	24 min
Aug 29, 4:31 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	29 min
Aug 29, 4:38 PM CDT	Severe Thunderstorm Warning	FGF	Traill	52 min
Aug 29, 6:07 PM CDT	Severe Thunderstorm Warning	FGF	Cass	23 min

Nearby

Tornado Warnings in Minnesota, 2004 Tornado Warnings in North Dakota, 2004 Every tornado warning in 2004 Tornadoes 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.