Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 97, NWS Grand Forks, ND

June 25, 2002Ransom County, Sargent County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 25, 2002, 3:54 PM CDT for Ransom County, Sargent County, North Dakota. It was in force for 51 min. 1 report 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: Jun 25, 2002, 3:54 PM CDT (20:54 UTC)
Expired: Jun 25, 2002, 4:45 PM CDT
In force: 51 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Ransom County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 122 km from the middle of the area, began a volume at 20:54 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
Jun 25, 4:20 PM CDT	Hail 0.88	Milnor, ND

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 25, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 8.9 hours before the alert went out and 175 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: 529 J/kg
Mixed-layer CIN: -324 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 252054
SVRFAR
NDC073-081-252145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
354 PM CDT TUE JUN 25 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHEASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA AND
  NORTHEASTERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA.

* UNTIL 445 PM CDT.

* AT 348 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTH OF MILNOR...OR ABOUT 42 MILES
  WEST OF WAHPETON...MOVEMENT WAS TO THE EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  MILNOR AT 355 PM...
  MCLEOD AT 400 PM...
  DE LAMERE AT 405 PM AND
  HAMLIN AT 415 PM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM TUESDAY
EVENING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4646 9757 4622 9767 4616 9729 4640 9730

77
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 1:14 PM CDT	Severe Thunderstorm Warning	FGF	Steele	46 min
Jun 25, 1:21 PM CDT	Tornado Warning	FGF	Griggs, Steele	24 min
Jun 25, 1:45 PM CDT	Tornado Warning	FGF	Steele	30 min
Jun 25, 2:07 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	38 min
Jun 25, 2:45 PM CDT	Severe Thunderstorm Warning	FGF	Cass	45 min
Jun 25, 3:50 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	55 min
Jun 25, 4:08 PM CDT	Severe Thunderstorm Warning	FGF	Richland	52 min
Jun 25, 5:10 PM CDT	Severe Thunderstorm Warning	FGF	Richland	35 min
Jun 25, 5:21 PM CDT	Severe Thunderstorm Warning	FGF	Sargent	24 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.