Alert archive / North Dakota / Tornado Warnings in 2003

Tornado Warning 21, NWS Grand Forks, ND

July 19, 2003Cavalier County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 19, 2003, 6:01 PM CDT for Cavalier County, North Dakota. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 19, 2003, 6:01 PM CDT (23:01 UTC)
Expired: Jul 19, 2003, 6:45 PM CDT
In force: 44 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Cavalier County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 179 km from the middle of the area, began a volume at 23:02 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.

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 19, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 296 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: 1376 J/kg
Mixed-layer CIN: -250 J/kg
Mixed-layer LCL: 1364 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 65 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.

286 
WFUS53 KFGF 192301
TORFGF
NDC019-192345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
601 PM CDT SAT JUL 19 2003

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...

  CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 645 PM CDT.

THIS IS AN UPGRADE TO THE SEVERE THUNDERSTORM WARNING.

* AT 557 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 3 MILES NORTH OF WALES...
  OR ABOUT 17 MILES NORTHWEST OF LANGDON...MOVEMENT WAS TO THE
  SOUTHEAST AT 55 MPH.

* THE TORNADO WILL BE NEAR...

  MOUNT CARMEL AT 605 PM...
  DRESDEN AT 610 PM...
  LANGDON AT 615 PM AND
  OSNABROCK AT 625 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 4922 9817 4913 9902 4860 9883 4863 9802

$$

DONAVON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 2:55 AM CDT	Severe Thunderstorm Warning	FGF	Benson	65 min
Jul 19, 5:11 AM CDT	Severe Thunderstorm Warning	FGF	Steele	49 min
Jul 19, 5:39 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	51 min
Jul 19, 6:46 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Ramsey, Walsh	44 min

Nearby

Tornado Warnings in North Dakota, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.