Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 253, NWS Grand Forks, ND

August 26, 2002Polk County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 26, 2002, 3:08 PM CDT for Polk County, Minnesota. It was in force for 42 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: Aug 26, 2002, 3:08 PM CDT (20:08 UTC)
Expired: Aug 26, 2002, 3:50 PM CDT
In force: 42 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 66 km from the middle of the area, began a volume at 20:07 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
Aug 26, 3:45 PM CDT	Hail 1	Euclid, MN

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, 8.1 hours before the alert went out and 263 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: 42 J/kg
Mixed-layer CIN: -300 J/kg
Mixed-layer LCL: 1460 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 86 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.

959 
WUUS53 KFGF 262008
SVRFAR
MNC119-262050-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
307 PM CDT MON AUG 26 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 350 PM CDT.

* AT 301 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER KEY WEST...OR ABOUT 15 MILES EAST OF GRAND
  FORKS...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  EUCLID AT 310 PM AND
  ANGUS AT 325 PM.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MONDAY
EVENING FOR EASTERN NORTH DAKOTA.

LAT...LON 4793 9692 4783 9669 4796 9651 4812 9659
          4813 9686


8
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 3:41 PM CDT	Tornado Warning	FGF	Polk	49 min
Aug 26, 3:46 PM CDT	Severe Thunderstorm Warning	FGF	Pennington, Red Lake	44 min
Aug 26, 3:51 PM CDT	Tornado Warning	FGF	Pennington, Red Lake	39 min
Aug 26, 4:30 PM CDT	Tornado Warning	FGF	Polk, Red Lake	45 min
Aug 26, 4:31 PM CDT	Severe Thunderstorm Warning	FGF	Pennington	44 min
Aug 26, 4:33 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	42 min
Aug 26, 4:50 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	40 min
Aug 26, 5:04 PM CDT	Flash Flood Warning	FGF	Red Lake	4 hr
Aug 26, 5:16 PM CDT	Tornado Warning	FGF	Polk	44 min
Aug 26, 5:17 PM CDT	Severe Thunderstorm Warning	FGF	Red Lake	43 min
Aug 26, 5:50 PM CDT	Severe Thunderstorm Warning	FGF	Mahnomen, Norman	55 min
Aug 26, 5:59 PM CDT	Severe Thunderstorm Warning	FGF	Polk	46 min
Aug 26, 6:26 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	49 min
Aug 26, 6:44 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Mahnomen, Norman	61 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.