Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 197, NWS Grand Forks, ND

August 9, 2002Hubbard County, Wadena County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 9, 2002, 7:20 PM CDT for Hubbard County, Wadena County, Minnesota. It was in force for 40 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 9, 2002, 7:20 PM CDT (00:20 UTC)
Expired: Aug 9, 2002, 8:00 PM CDT
In force: 40 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Hubbard County, MN, Wadena County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 202 km from the middle of the area, began a volume at 00:22 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 9, 7:30 PM CDT	Hail 0.75	Sebeka, 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.

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

Minneapolis, MN (KMPX), launched 00:00Z, 0.3 hours before the alert went out and 232 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: 28 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1421 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

888 
WUUS53 KFGF 100020
SVRFAR
MNC057-159-100100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
720 PM CDT FRI AUG 9 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHERN WADENA COUNTY IN CENTRAL MINNESOTA AND
  SOUTHEASTERN HUBBARD COUNTY IN NORTH CENTRAL MINNESOTA.

* UNTIL 800 PM CDT.

* AT 717 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES EAST OF SEBEKA...OR ABOUT 43 MILES EAST
  OF DETROIT LAKES...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  NIMROD AT 725 PM...
  HUNTERSVILLE AT 745 PM AND
  BADOURA AT 800 PM.

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

LAT...LON 4659 9515 4650 9493 4691 9454 4703 9486


8

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 9, 3:15 PM CDT, 4 hours 5 minutes earlier.

Area forecast discussion, Aug 9, 3:15 PM CDT, 4 hours 5 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
315 PM CDT FRI AUG 9 2002

FORECAST CHALLENGE IS PRECIPITATION. LATEST SATELLITE IMAGERY SHOWS
A FEW PATCHES OF CLOUDS...WITH MUCH OF THE AREA SEEING PLENTY OF
SUN. CURRENT MSAS SURFACE ANALYSIS SHOWS TROF STILL HOLDING THROUGH
THE RED RIVER VALLEY. WHEN COMPARING MSAS DATA TO MODEL
INITIALIZATIONS...PREFER ETA SOLUTION. MID AND UPPER LEVEL TROFS
CATCH UP TO SURFACE TROF BETWEEN 00Z AND 06Z TONIGHT...ADDING MID
LEVEL LIFT TO UPPER LEVEL DYNAMICS OVER THE SURFACE BOUNDARY...WHICH
SHOULD PRODUCE ADDITIONAL THUNDERSTORMS DEVELOPMENT ALONG AND
AHEAD OF THE SURFACE TROF TONIGHT. WITH PRECIPITABLE WATERS STILL
OVER 1.5 INCHES AND POTENTIAL FOR TRAINING OF STORMS AS TROF INCHES
EWRD OVERNIGHT...WILL KEEP HEAVY RAIN WORDING IN ZONES...BUT WITH
FFG FOR MOST COUNTIES IN 2-3 INCH RANGE...WILL LET FLOOD WATCH
EXPIRE.

500 MB LOW AND COLD POOL LINGER MAINLY OVER MN SIDE OF AREA ON
SAT...WHICH WITH A LITTLE DAYTIME HEATING COULD PRODUCE ADDITIONAL
THUNDERSTORMS IN THE N RED RIVER VALLEY AND NW MN SAT AFTERNOON AND
EVENING. THEN...NEXT SURFACE LOW PRESSURE SYSTEM AND UPPER LEVEL
TROF APPROACH AREA ON SUN...BRINGING IN THE NEXT CHANCE FOR
THUNDERSTORMS FOR SUN AFTERNOON INTO MON.

.EXTENDED...NW FLOW REGIME EARLY IN THE PERIOD WILL SLOWLY FLATTEN
SOMEWHAT LATE...BUT NOT REALLY ENOUGH TO MAKE MUCH DIFFERENCE.
TIMING OF WAVES IN FAST FLOW WILL BE TOUGH...SO RATHER THAN KEEP
ENTIRE PERIOD WET WILL TRY TO GO WITH BEST CHANCES. APPEARS 500 MB
COLD POOL WILL DROP DOWN INTO AREA ON WED WITH A COLD FRONTAL
PASSAGE. LITTLE AVAILABLE MOISTURE...BUT MAY BE ENOUGH INSTABILITY
FOR SOME THUNDER. WILL KEEP SAME GOING FOR THU...THEN DRY FOR FRI AS
SFC RIDGE AXIS NOSES IN. TEMPS TO REMAIN BELOW NORMAL.

.FGF...NONE.

NG/GODON

In the hours before

Local storm report, Aug 9, 2:18 PM CDT, 5 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
218 PM CDT FRI AUG 9 2002

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

0615 PM    4 E BUXTON                ND   WIND DAMAGE
08/08/02   TRAILL                         60 MPH WINDS...TREE DAMAGE

0630 PM    CROOKSTON                 MN   WIND DAMAGE
08/08/02   POLK                           2 TO 3 INCH DIAMETER
                                          BRANCHES DOWN

0745 PM    1 SE FISHER               MN   WIND DAMAGE
08/08/02   POLK                           4 TO 5 INCH DIAMETER
                                          BRANCHES DOWN

0745 PM    2 SW PORTLAND             ND   .75 INCH HAIL
08/08/02   TRAILL

0745 PM    8 E REYNOLDS              ND   WIND DAMAGE
08/08/02   TRAILL                         4 TO 5 INCH DIAMETER
                                          BRANCHES DOWN

0745 PM    8 E REYNOLDS              ND   .88 INCH HAIL
08/08/02   TRAILL

0815 PM    9 E MAYVILLE              ND   WIND DAMAGE
08/08/02   TRAILL                         61 FOOT GRAIN AUGER BLOWN
                                          OVER

0830 PM    1 S ELDRED                MN   WIND DAMAGE
08/08/02   POLK                           10 TO 12 INCH DIAMETER
                                          TREE DOWN

0845 PM    MAYVILLE                  ND   FLASH FLOOD
08/08/02   TRAILL                         STREET FLOODING

1030 PM    5 NW STEPHEN              MN   WIND DAMAGE
08/08/02   MARSHALL                       2 TO 3 INCH DIAMETER TREES
                                          DOWN

1040 PM    7 NE STEPHEN              MN   WIND DAMAGE
08/08/02   MARSHALL                       4 INCH DIAMETER TREES DOWN

1055 PM    3 NW DONALDSON            MN   WIND DAMAGE
08/08/02   KITTSON                        60 MPH WINDS (EST)...MANY
                                          TREES DOWN

1115 PM    MADDOCK                   ND   WIND DAMAGE
08/08/02   BENSON                         TREES DOWN

1130 PM    4 W COOPERSTOWN           ND   WIND DAMAGE
08/08/02   GRIGGS                         3 TO 4 INCH DIAMETER
                                          BRANCHES DOWN

1201 AM    MINNEWAUKAN               ND   WIND DAMAGE
08/09/02   BENSON                         TREES DOWN

1220 AM    5 NW STARKWEATHER         ND   WIND DAMAGE
08/09/02   RAMSEY                         4 INCH DIAMETER BRANCHES
                                          DOWN

1230 AM    1 W CANDO                 ND   WIND DAMAGE
08/09/02   TOWNER                         60 MPH WINDS...TREES DOWN

1235 AM    1 E CALIO                 ND   WIND DAMAGE
08/09/02   CAVALIER                       2 TO 3 INCH DIAMETER
                                          BRANCHES DOWN

0100 AM    CAVALIER                  ND   WIND DAMAGE
08/09/02   PEMBINA                        2 INCH DIAMETER BRANCHES
                                          DOWN

0105 AM    12 E LANGDON              ND   WIND DAMAGE
08/09/02   CAVALIER                       60 MPH WINDS (EST)...CROP
                                          DAMAGE AND BRANCHES DOWN

0130 AM    1 NE KENNEDY              MN   FLASH FLOOD
08/09/02   KITTSON                        WATER OVER COUNTY ROADS

DPORTER

Local storm report, Aug 9, 5:41 PM CDT, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
541 PM CDT FRI AUG 9 2002

...DELAYED REPORTS FROM 8/8/02...

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

0530 PM    8 NW PORTLAND             ND   .75 INCH HAIL
08/08/02   TRAILL

1015 PM    12 E GRAFTON              ND   WIND DAMAGE
08/08/02   WALSH                          3 INCH DIAMETER TREE LIMBS
                                          DOWN

1140 PM    PEKIN                     ND   WIND DAMAGE
08/08/02   NELSON                         3 INCH DIAMETER TREE LIMBS
                                          DOWN

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.