Alert archive / North Dakota / Tornado Warnings in 1998

Tornado Warning 4, NWS Grand Forks, ND

June 10, 1998Sargent County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jun 10, 1998, 7:27 PM CDT for Sargent County, North Dakota. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 10, 1998, 7:27 PM CDT (00:27 UTC)
Expired: Jun 10, 1998, 8:00 PM CDT
In force: 33 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Sargent County, ND

The radar

The Aberdeen radar (KABR), 95 km from the middle of the area, began a volume at 00:31 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 10, 7:30 PM CDT	Tornado F0	Cogswell, ND
Jun 10, 8:00 PM CDT	Hail 1.75	Gwinner, 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 10, 5:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.5 hours before the alert went out and 147 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: 263 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1180 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

959 
WFUS1 KFAR 110028 RRA
TORFAR
NDC081-110100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
727 PM CDT WED JUN 10 1998

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN SARGENT COUNTY IN SOUTHEASTERN NORTH DAKOTA

* UNTIL 800 PM CDT

* AT 725 THE PUBLIC REPORTED TWO TORNADOES NORTH OF COGSWELL... OR 55
  MILES WEST FO WAHPETON. THE STORM WAS MOVING NORTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  GWINNER

THIS IS A DANGEROUS STORM.  IF YOU ARE IN THE PATH OF THIS TORNADO
ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING.

KENNEDY
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 7:17 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	28 min
Jun 10, 7:23 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	32 min
Jun 10, 7:49 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	31 min
Jun 10, 7:54 PM CDT	Severe Thunderstorm Warning	FGF	Richland	31 min
Jun 10, 7:56 PM CDT	Severe Thunderstorm Warning	FGF	Cass	29 min
Jun 10, 8:08 PM CDT	Severe Thunderstorm Warning	FGF	Traill	32 min
Jun 10, 8:24 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	31 min
Jun 10, 8:52 PM CDT	Tornado Warning	FGF	Barnes	33 min
Jun 10, 8:57 PM CDT	Tornado Warning	FGF	Cass	33 min
Jun 10, 9:34 PM CDT	Severe Thunderstorm Warning	FGF	Cass	31 min

Nearby

Tornado Warnings in North Dakota, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.