Alert archive / North Dakota / Tornado Warnings in 2004

Tornado Warning 40, NWS Grand Forks, ND

July 18, 2004Grand Forks County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 18, 2004, 6:30 PM CDT for Grand Forks 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: Jul 18, 2004, 6:30 PM CDT (23:30 UTC)
Expired: Jul 18, 2004, 7:15 PM CDT
In force: 45 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Grand Forks County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 53 km from the middle of the area, began a volume at 23:29 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, 6:48 PM CDT	HAIL 1.75	5 E Emerado, ND
Jul 18, 6:48 PM CDT	HAIL 1.75	5 E Emerado, 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.5 hours before the alert went out and 282 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: 471 J/kg
Mixed-layer CIN: -397 J/kg
Mixed-layer LCL: 1450 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 233 m²/s²
0-3 km storm-relative helicity: 294 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFGF 182330
TORFGF
NDC035-190015-

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...

  CENTRAL GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA

* UNTIL 715 PM CDT.

* AT 625 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 2 MILES SOUTH OF
  HONEYFORD...OR ABOUT 19 MILES WEST OF GRAND FORKS...MOVING TO THE
  SOUTHEAST AT 10 MPH.

* THE TORNADO WILL BE NEAR...

  ARVILLA AT 635 PM...
  MEKINOCK AT 640 PM...
  GRAND FORKS AFB AT 645 PM AND
  EMERADO AT 655 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 4812 9746 4799 9764 4781 9739 4797 9720

$$

HOPPES

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.