Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 250, NWS Grand Forks, ND

August 23, 2002Pennington County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 23, 2002, 9:00 PM CDT for Pennington County, Minnesota. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 23, 2002, 9:00 PM CDT (02:00 UTC)
Expired: Aug 23, 2002, 9:45 PM CDT
In force: 45 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Pennington County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 113 km from the middle of the area, began a volume at 02:02 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, 2.0 hours before the alert went out and 210 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: 889 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1340 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 19 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.

448 
WUUS53 KFGF 240200
SVRFAR
MNC113-240245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
900 PM CDT FRI AUG 23 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  PENNINGTON COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 945 PM CDT.

* AT 857 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES EAST OF CARPENTERS CORNER...OR ABOUT 10
  MILES WEST OF THIEF RIVER FALLS...MOVEMENT WAS TO THE SOUTHEAST AT
  25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  DAKOTA JUNCTION AT 910 PM...
  THIEF RIVER FALLS AT 915 PM...
  ST. HILAIRE AT 925 PM AND
  HAZEL AT 930 PM.

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


23

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 23, 9:00 PM CDT, 0 minutes earlier.

Area forecast discussion, Aug 23, 9:00 PM CDT, 0 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
900 PM CDT FRI AUG 23 2002

FORECAST CHALLENGE FOR TONIGHT IS PRECIPITATION. LATEST SATELLITE
IMAGERY SHOWS CLOUDS ASSOCIATED WITH CONVECTION ALONG COLD FRONT.
CURRENT MSAS SURFACE ANALYSIS HAS COLD FRONT EXTENDING THROUGH AREA
ALONG A ROX-GFK-JMS LINE. SURFACE HIGH ALONG S SASK/MB BORDER INTO
LK YWG...WITH RIDGE AXIS EXTENDING IN W ND. WHEN COMPARING
ATMOSPHERIC CONDITIONS TO MODEL INITIALIZATIONS...ETA AND AVN BOTH
CLOSE...BUT PREFERRED AVN SOLUTION. COLD FRONT CONTINUES TRACKING S
THROUGH AREA OVERNIGHT. IN GENERAL...INTENSITY OF STORMS HAS BEEN
WEAKENING...WITH STILL HAVING THUNDER...BUT NOT AS MUCH SEVERE. ALL
IN ALL...CURRENT FORECAST IS STILL LOOKING PRETTY GOOD...WITH SOME
MINOR CHANGES NEEDED.

.FGF...NONE.

NG

In the hours before

Local storm report, Aug 23, 6:53 PM CDT, 2 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
653 PM CDT FRI AUG 23 2002

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

0600 PM    2 NE CONCRETE             ND   .88 INCH HAIL
08/23/02   PEMBINA                        REPORTED BY PUBLIC.

0615 PM    5 NW BISBEE               ND   .75 INCH HAIL
08/23/02   TOWNER                         HAIL FELL FOR 15 MINUTES

DPORTER

Local storm report, Aug 23, 6:56 PM CDT, 2 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
656 PM CDT FRI AUG 23 2002

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

0650 PM    2 NW CRYSTAL              ND   1.75 INCH HAIL
08/23/02   PEMBINA                        REPORTED BY CO-OP
                                          OBSERVER.

DPORTER

Local storm report, Aug 23, 7:08 PM CDT, 1 hour 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
708 PM CDT FRI AUG 23 2002

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

0702 PM    HOOPLE                    ND   .75 INCH HAIL
08/23/02   WALSH                          REPORTED BY FIRE
                                          DEPARTMENT.

DPORTER

Local storm report, Aug 23, 7:23 PM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
723 PM CDT FRI AUG 23 2002

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

0720 PM    HALLOCK                   MN   WIND DAMAGE
08/23/02   KITTSON                        3 INCH DIAMETER BRANCHES
                                          DOWN. SHINGLES BLOWN OFF
                                          COMMERCIAL BUILDINGS.
                                          ESTIMATED 60 MPH WINDS.
                                          REPORTED BY LAW
                                          ENFORCEMENT.

DPORTER

Local storm report, Aug 23, 7:50 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
750 PM CDT FRI AUG 23 2002

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

0721 PM    HALLOCK                   MN   WIND DAMAGE
08/23/02   KITTSON                        POWER POLES BUSTED...EIGHT
                                          INCH DIAMETER TREES
                                          DOWN...TWO ROOFS LIFTED.
                                          REPORTED BY LAW
                                          ENFORCEMENT.

DPORTER

Local storm report, Aug 23, 8:47 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
847 PM CDT FRI AUG 23 2002

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

0722 PM    HALLOCK                   MN   WIND DAMAGE
08/23/02   KITTSON                        80 MPH ESTIMATE
                                          WINDS...METAL ROOFS RIPPED
                                          OFF...18 INCH DIAMETER
                                          TREES DOWN...6 TO 8 INCH
                                          DIAMETER BRANCHES FELL ON
                                          POWER LINES...NEWLY LAID
                                          SOD BLOWN INTO STREETS.
                                          REPORTED BY LAW
                                          ENFORCEMENT.

DPORTER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 7:12 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	48 min
Aug 23, 7:28 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	47 min
Aug 23, 8:14 PM CDT	Severe Thunderstorm Warning	FGF	Polk	46 min
Aug 23, 8:49 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	26 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.