735
FXCN01 CWHF 200909
KEY FORECAST POINTS:
- LIGHT NORTHEAST WINDS AND FAIR WEATHER TODAY
- STRONG EAST TO NORTHEAST WINDS AND HEAVY SNOW TONIGHT
- SNOW MIXED WITH ICE PELLETS SATURDAY MORNING TAPERING OFF TO
FLURRIES IN THE AFTERNOON
SHORT RANGE DISCUSSION FOR OPS AREA ALPHA AND THE ECHOES, CFB HALIFAX
PROPERTIES AND 12 WING SHEARWATER
PERIOD OF COVERAGE: 0600Z 20 DEC TO 0400Z 22 DEC.
MODEL DISCUSSION: USED RDPS/HRDPS.
CONFIDENCE: MODERATE TO HIGH.
COMMENTS/IMPACTS: A LOW PRESSURE SYSTEM FORECAST TO INTENSIFY OFF THE
EAST COAST OF THE UNITED STATES TODAY IS EXPECTED TO TRACK
NORTHWARD TOWARD EASTERN NOVA SCOTIA TONIGHT AND SATURDAY. THIS
SYSTEM IS FORECAST TO BRING HEAVY SNOW AND STRONG GUSTY NORTHEAST
WINDS TO THE HALIFAX AREA TONIGHT.
SNOW IS FORECAST TO BEGIN THIS EVENING AND ALTHOUGH IT MAY BE
MIXED WITH RAIN AT TIMES AT ONSET THAT WILL LIKELY BE SHORT LIVED.
BY MIDNIGHT THE SNOW IS EXPECTED TO BE HEAVY AT TIMES WITH THE
HIGHEST SNOWFALL RATES OVERNIGHT. BY ABOUT 0400 LOCAL SATURDAY 15
TO 20 CM ARE FORECAST. AT THAT TIME SNOW IS EXPECTED TO BEGIN
MIXING WITH ICE PELLETS AND THE SNOW AND ICE PELLETS MIX CONTINUES
SATURDAY MORNING BEFORE BEGINNING TO EASE EARLY SATURDAY AFTERNOON.
A FURTHER 5 CM OF SNOW AND ICE PELLETS ARE FORECAST ON SATURDAY.
SNOWFALL AMOUNTS MAY BE REDUCED SOMEWHAT IF THE CHANGE TO ICE
PELLETS BECOMES MORE SIGNIFICANT EARLY SATURDAY.
STRONG EASTERLY WINDS ARE FORECAST TO DEVELOP THIS EVENING AHEAD
OF THE LOW. AS THE LOW CONTINUES APPROACHING FROM THE SOUTH DURING
THE NIGHT WINDS BACK TO MORE NORTHEAST AND FURTHER INCREASE TO
GUSTING GALE FORCE OVERNIGHT. AS THE LOW PASSES BY TO THE EAST OF
HALIFAX ON SATURDAY WINDS BACK TO THE NORTH THEN NORTHWEST WITH
GUSTS EASING SLIGHTLY. GUSTY WINDS CONTINUE UNTIL SATURDAY EVENING
WHEN THE LOW LEAVES THE REGION. THE ABOVE STRONG WINDS MAY PRODUCE
REDUCED VISIBILITIES AT TIMES IN BLOWING SNOW.
LONG RANGE DISCUSSION FOR OPS AREA ALPHA AND THE ECHOES, CFB HALIFAX
PROPERTIES AND 12 WING SHEARWATER
PERIOD OF COVERAGE: 0400Z 22 DEC TO 0400Z 25 DEC.
MODEL DISCUSSION: USED GDPS.
CONFIDENCE: MODERATE TO HIGH.
COMMENTS/IMPACTS: IN THE WAKE OF THE EARLY WEEKEND STORM SYSTEM A
LIGHT TO MODERATE NORTHWEST FLOW IS FORECAST FOR SUNDAY.
TEMPERATURES FALL DURING THE DAY AS COLD AIR MOVES IN BEHIND THE
SYSTEM AND THE UNSTABLE AIRMASS LEADS TO CLOUD AND A FEW FLURRIES.
MONDAY SEES A RIDGE APPROACHING FROM THE WEST ALLOWING THE LIGHT
TO MODERATE NORTHERLY FLOW AHEAD OF IT TO EASE LATER IN THE DAY.
COLD AIR TEMPERATURES CONTINUE.
A WEAK TROUGH IS FORECAST TO APPROACH FROM THE WEST ON TUESDAY.
WINDS BECOME A LIGHT TO MODERATE SOUTHWEST AND TEMPERATURES
RECOVER BACK UP TO NEAR ZERO. FLURRIES OR LIGHT SNOW LOOKS TO
ACCOMPANY THE TROUGH. THE GFS SOLUTION IS FAIRLY SIMILAR TO THE
GDPS.
END/METOC-HFX
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page