Severe Thunderstorm Warning 277, NWS Grand Forks, ND

Issued

Aug 27, 2002, 10:05 AM CDT (15:05 UTC)

Expired

Aug 27, 2002, 11:00 AM CDT

In force

55 min

Issued by

NWS Grand Forks, ND

Area

Counties, with a storm outline in the text

County Cavalier County, ND

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.

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.

962 
WUUS53 KFGF 271505
SVRFAR
NDC019-271600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1005 AM CDT TUE AUG 27 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 1100 AM CDT.

* AT 1002 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTHWEST OF ALSEN...OR ABOUT 22 MILES
  SOUTHWEST OF LANGDON...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  ALSEN AT 1015 AM AND
  LANGDON AT 1040 AM

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

LAT...LON 4861 9898 4857 9867 4878 9825 4896 9851


DTR

NNNN

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 27, 3:37 AM CDT, 6 hours 28 minutes earlier.

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
337 AM CDT TUE AUG 27 2002

.SHORT TERM...
UPPER LEVEL LOW IS LOCATED OVER SOUTHEAST SASKATCHEWAN ON WATER
VAPOR. UPPER LOW IS FORECAST TO SLOWLY MOVE INTO SOUTHERN MANITOBA
BY 12Z THURSDAY. WATER VAPOR LOOP ALSO SHOWS UPPER LEVEL RIDGE
MOVING INTO SD AND NEB EAST OF ANOTHER UPPER TROUGH OVER THE PACIFIC
NW. SHORT WAVE TROUGH WAS OVER UTAH AND WAS ROTATING NORTHEAST.
MODELS KEEP VORTICITY TO THE SOUTH. UPPER LEVEL JET OVER THE
NORTHERN PLAINS IS WEAK WITH 30KTS OR LESS WIND THROUGH 60 HOURS.
500MB TEMPERATURES RELATIVELY COOL. WITH 850MB THETA-E REMAINING
HIGH AT 330K AND SOUTHERLY 850MB FLOW STEEP LOW LEVEL LAPSE RATES
WILL CONTINUE. AFTERNOON HEATING TO OCCUR IN THE WESTERN DAKOTAS AND
SPREAD NORTHEAST IN THE AFTERNOON. WILL KEEP CHANCE OF THUNDERSTORMS
THROUGH THE PERIOD WITH EMPHASIS FOR DIURNAL LATE AFTERNOON THROUGH
EARLY MORNING. MODELS APPEAR CONSERVATIVE WITH AFTERNOON HIGH TEMPS
WILL BUMP THEM UP.

.LONG TERM...
NO CHANGES.

.FGF...NONE.
HOPPES

In the hours before

MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-271400-

SPECIAL WEATHER STATEMENT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
700 AM CDT TUE AUG 27 2002

...SEVERE THUNDERSTORMS ARE EXPECTED ACROSS PARTS OF EASTERN NORTH
DAKOTA AND NORTHWEST MINNESOTA THIS AFTERNOON AND EVENING...

SYNOPSIS...MOIST UNSTABLE AIR WILL REMAIN ACROSS THE NORTHERN
PLAINS. COOL TEMPERATURES ALOFT AND AFTERNOON HEATING WILL PRODUCE
SCATTERED THUNDERSTORMS BEGINNING THIS AFTERNOON.

AREA OF CONCERN...A SLIGHT RISK OF SEVERE THUNDERSTORMS IS EXPECTED
ACROSS NORTHEAST NORTH DAKOTA AND NORTHWEST MINNESOTA NORTH OF A
LINE FROM VALLEY CITY TO FARGO TO PARK RAPIDS MINNESOTA LINE.

TIME...START AFTER 3 PM AND DIMINISH AFTER 2 AM WEDNESDAY MORNING.

TYPE OF HAZARD...MAINLY LARGE HAIL. ISOLATED DAMAGING WINDS. ALSO
SLOW MOVING THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAINFALL.

HOPPES

NNNN

Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002

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.