Alert archive / North Dakota / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 22, NWS Grand Forks, ND

June 6, 2003Cass County, North Dakota; Clay County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 6, 2003, 4:47 PM CDT for Cass County, North Dakota; Clay County, Minnesota. It was in force for 43 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: Jun 6, 2003, 4:47 PM CDT (21:47 UTC)
Expired: Jun 6, 2003, 5:30 PM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

Counties Clay County, MN, Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 87 km from the middle of the area, began a volume at 21:46 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.

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

Aberdeen, SD (KABR), launched 12:00Z, 9.8 hours before the alert went out and 251 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: 24 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 20 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.

000 
WUUS53 KFGF 062147
SVRFGF
MNC027-NDC017-062230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
446 PM CDT FRI JUN 6 2003

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  WEST CENTRAL CLAY COUNTY IN NORTHWEST MINNESOTA AND
  EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA.

* UNTIL 530 PM CDT.

* AT 441 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER REILES ACRES...OR ABOUT 3 MILES NORTH
  OF FARGO...MOVEMENT WAS NEARLY STATIONARY OVER THE F-M AREA.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  FARGO AT 450 PM
  MOORHEAD AT 450 PM 
  NORTH RIVER AT 450 PM AND
  REILES ACRES AT 455 PM.

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

LAT...LON 4675 9677 4682 9659 4701 9675 4690 9696

$$

DK/GUST

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 Jun 6, 2:02 PM CDT, 2 hours 45 minutes earlier.

Area forecast discussion, Jun 6, 2:02 PM CDT, 2 hours 45 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
202 PM CDT FRI JUN 6 2003

.CURRENT OBSERVATIONS...
SCATTERED SEVERE CONVECTION CURRENTLY ONGOING. MAIN FOCUSING
MECHANISM IS INVERTED TROUGH EXTENDING UP THE RED RIVER VALLEY.
ANOTHER AREA OF CONVECTION LOCATED ACROSS THE LAKE OF THE WOODS
REGION WHERE SFC DEWPOINTS AROUND 60 HAVE POOLED ALONG ONE OF MANY
BOUNDARIES. GOOD CONVERGENT FLOW CONTINUES OVER EASTERN NORTH DAKOTA
AS AREA REMAINS BETWEEN TWO UPPER LEVEL SYSTEMS WHICH WILL LIKELY
KEEP CONVECTION GOING LATE THIS EVENING.

.SHORT TERM(TONIGHT-MON)...
AREA WILL REMAIN UNSTABLE THROUGH SATURDAY EVENING AS INVERTED
TROUGH SLOWLY MOVES THROUGH THE FORECAST AREA. TONIGHT WILL BE
SIMILAR TO LAST NIGHT WITH CONVECTION BECOMING MORE SCATTERED AFTER
SUNSET WITH SOME LINGERING PRECIP THROUGHOUT THE NIGHT. AS MONTANA
UPPER LOW BEGINS TO SHIFT SOUTHEAST ON SATURDAY...ANOTHER WAVE WILL
MOVE OVER THE BOUNDARY AND WILL LIKELY SET OFF ANOTHER ROUND OF
CONVECTION. CONVECTION WILL BE SIMILAR TO THE PAST TWO DAYS WITH
MARGINALLY SEVERE STORMS POSSIBLE DURING THE AFTERNOON. SYSTEM PULLS
OUT OF THE REGION SUNDAY WITH MUCH OF THE REGION HAVING SUN BY THE
AFTERNOON. NEXT BOUNDARY MOVES THROUGH THE REGION MONDAY WHICH WILL
BRING THE NEXT CHANCE OF THUNDER.

.EXTENDED...
REGION TO TRANSITION FROM NW FLOW ALOFT INTO MORE ZONAL PATTERN
THROUGH EXTENDED PERIOD. OVERALL REASONABLE CONSISTENCY BETWEEN GFS
RUNS AND AGREEMENT WITH OTHER MODELS. MAIN CHALLENGE WILL BE TIMING
WITH WAVES AND THIS TO NOT TOO FAR OFF. INITIAL WAVE AND ASSOCIATED
SURFACE BOUNDARY MONDAY NIGHT/TUESDAY AND NEXT WAVE WED NIGHT
THURSDAY. AS WITH TIMING OF WAVES...TEMPERATURES WILL ALSO BE
CHALLENGE. WARMEST TEMPERATURES THIS PERIOD APPEAR MID WEEK PRIOR TO
STRONGER WAVE.

.FGF...NONE.

DONAVON/VOELKER

Hazardous weather outlook, Jun 6, 7:05 AM CDT, 9 hours 42 minutes before

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-061400-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
705 AM CDT FRI JUN 6 2003

...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS PARTS OF NORTHWEST AND
WEST CENTRAL MINNESOTA FOR TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NORTH DAKOTA...WEST
CENTRAL AND NORTHWEST MINNESOTA.

.DAY ONE...THIS AFTERNOON AND EVENING

ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND
EVENING EAST OF A LINE FROM ROSEAU TO FERGUS FALLS MINNESOTA.
THUNDERSTORMS WILL PRODUCE MAINLY LARGE HAIL. THE SEVERE
THUNDERSTORMS WILL DEVELOP AFTER THE NOON HOUR AND SHOULD DISSIPATE
AROUND 8 PM.

AFTERNOON HEATING AND RELATIVELY COLD AIR ALOFT WILL PRODUCE
UNSTABLE CONDITIONS AGAIN THIS AFTERNOON. LOW PRESSURE OVER NORTHWEST
MINNESOTA WILL MOVE INTO EASTERN MINNESOTA BY THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

HOPPES

In the hours before

Local storm report, Jun 6, 1:32 PM CDT, 3 hours 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
132 PM CDT FRI JUN 6 2003

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

0115 PM    8 W REYNOLDS              ND   .75 INCH HAIL
06/06/03   TRAILL                         REPORTED BY PUBLIC.

0115 PM    3 S HOLMES                ND   .75 INCH HAIL
06/06/03   GRAND FORKS                    REPORTED BY PUBLIC.

TG

Local storm report, Jun 6, 1:59 PM CDT, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
159 PM CDT FRI JUN 6 2003

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

0130 PM    4 SW WANNASKA             MN   .75 INCH HAIL
06/06/03   ROSEAU                         REPORTED BY PUBLIC.

TG

Local storm report, Jun 6, 2:26 PM CDT, 2 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
226 PM CDT FRI JUN 6 2003

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

0216 PM    7 W WALES                 ND   TORNADO
06/06/03   CAVALIER                       REPORTED BY LAW
                                          ENFORCEMENT.

TG

Local storm report, Jun 6, 4:42 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
442 PM CDT FRI JUN 6 2003

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

0408 PM    3 S GEORGETOWN            MN   .75 INCH HAIL
06/06/03   CLAY

0428 PM    6 NNE MCINTOSH            MN   .75 INCH HAIL
06/06/03   POLK                           REPORTED BY TRAINED
                                          SPOTTER.

DPORTER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 12:05 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier	40 min
Jun 6, 1:12 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill	48 min
Jun 6, 2:19 PM CDT	Tornado Warning	FGF	Cavalier	41 min
Jun 6, 5:14 PM CDT	Flash Flood Warning	FGF	Cass	4 hr
Jun 5, 7:28 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	62 min
Jun 6, 1:07 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	38 min
Jun 6, 3:58 PM CDT	Severe Thunderstorm Warning	FGF	Clay	47 min
Jun 6, 4:11 PM CDT	Severe Thunderstorm Warning	FGF	Polk	49 min
Jun 6, 4:35 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	40 min
Jun 6, 4:51 PM CDT	Tornado Warning	FGF	Becker	39 min
Jun 6, 5:07 PM CDT	Severe Thunderstorm Warning	FGF	Red Lake	38 min
Jun 6, 5:12 PM CDT	Severe Thunderstorm Warning	FGF	Norman	48 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2003 Severe Thunderstorm Warnings in Minnesota, 2003 Every severe thunderstorm warning in 2003

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.