Alert archive / North Dakota / Tornado Warnings in 2004

Tornado Warning 42, NWS Grand Forks, ND

July 18, 2004Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 18, 2004, 7:32 PM CDT for Traill County, North Dakota. It was in force for 43 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: Jul 18, 2004, 7:32 PM CDT (00:32 UTC)
Expired: Jul 18, 2004, 8:15 PM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 8 km from the middle of the area, began a volume at 00:35 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
Jul 18, 7:48 PM CDT	TORNADO 3	6 Se Hatton, ND
Jul 18, 7:48 PM CDT	TORNADO 3	6 Se Hatton, ND

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 18, 6:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 310 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: 2541 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1628 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFGF 190032
TORFGF
NDC097-190115-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
731 PM CDT SUN JUL 18 2004

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...

  TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 815 PM CDT.

* AT 725 PM...THE TRAILL COUNTY SPOTTERS REPORTED A TORNADO 10 MILES
  NORTHWEST OF PORTLAND...OR ABOUT 29 MILES SOUTHWEST OF GRAND
  FORKS...MOVING TO THE SOUTHEAST AT 10 MPH.

* THE TORNADO WILL BE NEAR...

  PORTLAND AT 805 PM AND
  MAYVILLE AT 810 PM.

DO NOT OUTRUN A TORNADO IN YOUR CAR. LEAVE YOUR CAR AND GO TO A
STRONG BUILDING OR SEEK SHELTER IN A DITCH OR LOW SPOT.

LAT...LON 4767 9737 4762 9749 4740 9747 4760 9712

$$

HOPPES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:15 PM CDT	Tornado Warning	FGF	Grand Forks, Steele	45 min
Jul 18, 8:23 PM CDT	Tornado Warning	FGF	Barnes	52 min
Jul 18, 8:31 PM CDT	Tornado Warning	FGF	Cass, Steele	44 min
Jul 18, 9:14 PM CDT	Tornado Warning	FGF	Barnes, Cass	46 min
Jul 18, 10:00 PM CDT	Flash Flood Warning	FGF	Cass	8 hr
Jul 18, 10:01 PM CDT	Tornado Warning	FGF	Cass	29 min

Nearby

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.