Alert archive / North Dakota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 9, NWS Grand Forks, ND

May 11, 2004Ransom County, Richland County, Sargent County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 11, 2004, 5:05 PM CDT for Ransom County, Richland County, Sargent County, North Dakota. It was in force for 40 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: May 11, 2004, 5:05 PM CDT (22:05 UTC)
Expired: May 11, 2004, 5:45 PM CDT
In force: 40 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Ransom County, ND, Richland County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 123 km from the middle of the area, began a volume at 22:07 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
May 11, 3:55 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.1 hours before the alert went out and 173 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: 48 J/kg
Mixed-layer CIN: -312 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 355 m²/s²
0-3 km storm-relative helicity: 454 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

471 
WUUS53 KFGF 112205
SVRFGF
NDC073-077-081-112245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
505 PM CDT TUE MAY 11 2004

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHEASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA
  NORTHERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA
  NORTHEASTERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 545 PM CDT.

* AT 500 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES WEST OF CAYUGA...OR ABOUT 42 MILES WEST
  OF WAHPETON...MOVEMENT WAS TO THE NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  HAMLIN AT 515 PM...
  DE LAMERE AT 520 PM...
  WYNDMERE AT 525 PM AND
  BARNEY AT 535 PM.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4610 9760 4600 9738 4642 9676 4659 9710

$$

DK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 5:07 PM CDT	Severe Thunderstorm Warning	FGF	Traill	38 min
May 11, 5:10 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	50 min
May 11, 5:40 PM CDT	Tornado Warning	FGF	Ransom, Richland	50 min
May 11, 6:24 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Steele	36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.