Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 340, NWS Grand Forks, ND

September 1, 2002Beltrami County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 1, 2002, 1:50 AM CDT for Beltrami County, Minnesota. 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: Sep 1, 2002, 1:50 AM CDT (06:50 UTC)
Expired: Sep 1, 2002, 2:30 AM CDT
In force: 40 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Beltrami County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 183 km from the middle of the area, began a volume at 06:51 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 nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 6.8 hours before the alert went out and 138 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: 2440 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

713 
WUUS53 KFGF 010650
SVRFAR
MNC007-010730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
149 AM CDT SUN SEP 1 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHERN BELTRAMI COUNTY IN NORTH CENTRAL MINNESOTA.

* UNTIL 230 AM CDT.

* AT 146 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTH OF THORHULT...OR ABOUT 41 MILES
  EAST OF THIEF RIVER FALLS...MOVEMENT WAS TO THE NORTHEAST AT 25
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  THORHULT AT 155 AM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM SUNDAY
MORNING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4821 9549 4805 9538 4816 9450 4835 9456


BERG

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 8:53 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	52 min
Aug 31, 11:46 PM CDT	Severe Thunderstorm Warning	FGF	Clay	44 min
Sep 1, 12:02 AM CDT	Severe Thunderstorm Warning	FGF	Marshall	43 min
Sep 1, 12:20 AM CDT	Severe Thunderstorm Warning	FGF	Polk	40 min
Sep 1, 12:24 AM CDT	Severe Thunderstorm Warning	FGF	Pennington, Red Lake	51 min
Sep 1, 12:52 AM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	38 min
Sep 1, 1:16 AM CDT	Severe Thunderstorm Warning	FGF	Roseau	29 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; radar from the NEXRAD Level II archive.