Alert archive / Minnesota / Tornado Warnings in 2002

Tornado Warning 12, NWS Grand Forks, ND

July 25, 2002Mahnomen County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 25, 2002, 6:36 PM CDT for Mahnomen County, Minnesota. It was in force for 39 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 25, 2002, 6:36 PM CDT (23:36 UTC)
Expired: Jul 25, 2002, 7:15 PM CDT
In force: 39 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Mahnomen County, MN

What was reported inside it

Time	Report	Where	Remark
Jul 25, 6:55 PM CDT	Hail 0.88	Bejou, MN
Jul 25, 6:58 PM CDT	Tornado F1	Bejou, MN	Numerous trees were uprooted.

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 nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.6 hours before the alert went out and 226 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: 8 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 126 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.

034 
WFUS53 KFGF 252336
TORFAR
MNC087-260015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
635 PM CDT THU JUL 25 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...

  MAHNOMEN COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 715 PM CDT.

* AT 630 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION 6 MILES NORTHEAST OF
  BEJOU...OR ABOUT 44 MILES SOUTH OF THIEF RIVER FALLS...MOVEMENT WAS
  TO THE SOUTHEAST AT 10 MPH.

* THE TORNADO WILL BE NEAR...

  BEJOU AT 640 PM...
  ISLANDLAKE AT 710 PM AND
  BEAULIEU AT 715 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 4749 9570 4749 9604 4721 9588 4730 9557


55

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 1:09 AM CDT	Severe Thunderstorm Warning	FGF	Clay	51 min
Jul 25, 1:56 AM CDT	Severe Thunderstorm Warning	FGF	Becker	49 min
Jul 25, 2:41 AM CDT	Severe Thunderstorm Warning	FGF	Becker	49 min
Jul 25, 4:49 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	41 min
Jul 25, 5:55 PM CDT	Severe Thunderstorm Warning	FGF	Polk	35 min
Jul 25, 6:22 PM CDT	Tornado Warning	FGF	Polk	38 min
Jul 25, 6:39 PM CDT	Severe Thunderstorm Warning	FGF	Clay	51 min

Nearby

Tornado Warnings in Minnesota, 2002 Every tornado warning in 2002 Tornadoes 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.