Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 214, NWS Grand Forks, ND

August 14, 2002Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 14, 2002, 9:00 PM CDT for Lake of the Woods County, Minnesota. It was in force for 30 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: Aug 14, 2002, 9:00 PM CDT (02:00 UTC)
Expired: Aug 14, 2002, 9:30 PM CDT
In force: 30 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Lake of the Woods County, MN

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.0 hours before the alert went out and 105 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: 612 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

353 
WUUS53 KFGF 150200
SVRFAR
MNC077-150230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
901 PM CDT WED AUG 14 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  CENTRAL LAKE OF THE WOODS COUNTY IN NORTH CENTRAL MINNESOTA.

* UNTIL 930 PM CDT.

* AT 859 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER GRACETON...OR ABOUT 43 MILES EAST OF
  ROSEAU...MOVEMENT WAS TO THE EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  PITT AT 905 PM...
  WHEELERS POINT AT 910 PM AND
  BAUDETTE AT 915 PM.

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

LAT...LON 4883 9497 4866 9491 4874 9424 4896 9432

DTR

NNNN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 14, 8:45 PM CDT, 15 minutes earlier.

Area forecast discussion, Aug 14, 8:45 PM CDT, 15 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
845 PM CDT WED AUG 14 2002

FCST CONCERNS IS THUNDRESTORM POTENTIAL OVERNIGHT.

LOW MOVING INTO NW ONTARIO WITH COLD FRONT FROM ROSEAU TO GRAND
FORKS TO BETWEEN JAMESTOWN AND FARGO.  THE FRONT HAS NOT MOVED MUCH
SINCE 22Z AWAITING ARRIVAL OF THE NEXT 50H VORT MOVING THRU MONTANA.
ISOLD SVR CELLS DEVELOPED ALONG FRONT IN NW MN WITH LOW 50 VILS
PRODUCING UP TO 2 INCH HAIL.

ANOTHER AREA OF LOW PRESSURE WAS OVER EAST CENTRAL SOUTH DAKOTA WITH
WARM FRONT INTO SRN MINNESOTA.  AS ADVERTISED BY 12Z MODEL
RUNS...LATEST RUC AND SWOMCD 40-50KT 85H JET WILL DEVELOP OVERNIGHT
AND PROVIDE ENOUGH ELEVATED INSTABILITY IN COMBINATION WITH STRONG
50H WINDS ASSOCIATED WITH 50H VORT TO GENERATE ELEVATED TSRA
OVERNIGHT...WITH BEST CHANCE OVER CNTRL MN...CLIPPING OUR FAR SE
CWFA.  STILL TO EARLY TO TELL HOW WIDESPREAD THIS EVENT WILL BE.

MEANWHILE...MORE GENERAL SHOWERS AND ISOLD -TSRA WILL SPREAD THRU
CWFA OVERNIGHT AS WAVE PASSES THRU.

WILL CHECK OVER THE FCST TO SEE IF ANY FINE TUNING IS NEEDED.

.FGF...NONE.
RIDDLE

In the hours before

Local storm report, Aug 14, 8:06 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
806 PM CDT WED AUG 14 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0750 PM    3 NE STRATHCONA           MN   2.00 INCH HAIL
08/14/02   ROSEAU

Local storm report, Aug 14, 8:35 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
835 PM CDT WED AUG 14 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0755 PM    8 NW GATZKE               MN   .88 INCH HAIL
08/14/02   MARSHALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 7:23 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	52 min
Aug 14, 7:51 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	39 min
Aug 14, 8:06 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	39 min
Aug 14, 9:10 PM CDT	Severe Thunderstorm Warning	FGF	Grant	35 min
Aug 14, 9:44 PM CDT	Severe Thunderstorm Warning	FGF	Grant	31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive.