904
FXCN01 CWHF 160812
FORECAST DISCUSSION FOR OPS AREA ALPHA AND THE ECHOES, CFB HALIFAX
PROPERTIES AND 12 WING SHEARWATER ISSUED BY AVIATION AND DEFENCE
SERVICES OF ENVIRONMENT AND CLIMATE CHANGE CANADA AT 0830Z ON
WEDNESDAY 16 SEP
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KEY FORECAST POINTS:
- PATCHY MIST OR FOG DISSIPATING THIS MORNING OTHERWISE SUNNY.
- BECOMING A MIX OF SUN AND CLOUD THIS AFTERNOON.
- PARTLY CLOUDY WITH LIGHT WINDS TONIGHT AND THURSDAY.
- SHOWERS ON FRIDAY WITH GUSTY NORTHWEST WINDS LATER IN THE DAY.
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SHORT RANGE DISCUSSION FOR 0600Z 16 SEP TO 0300Z 18 SEP.
MODEL DISCUSSION: USED RDPS/HRDPS.
CONFIDENCE: HIGH.
COMMENTS/IMPACTS: A RIDGE OF HIGH PRESSURE WILL LIE OVER NOVA SCOTIA
TODAY BEFORE WEAKENING AND MOVING SOUTH OF THE PROVINCE TONIGHT.
LIGHT WINDS ARE EXPECTED TO BECOME LIGHT TO MODERATE SOUTHWESTERLY
OVER THE APPROACHES THIS AFTERNOON BEFORE DIMINISHING TO LIGHT
AGAIN TONIGHT. ANY PATCHY MIST OR FOG THAT DEVELOPS EARLY THIS
MORNING DUE TO RADIATIVE COOLING WILL DISSIPATE QUICKLY AFTER
SUNRISE OTHERWISE SUNNY SKIES ARE FORECAST THIS MORNING. SOME
SCATTERED MID OR HIGH CLOUD IS POSSIBLE THIS AFTERNOON. LIGHT WINDS
AND PATCHY CLOUD ARE FORECAST FOR TONIGHT.
THE PRESSURE PATTERN REMAINS FAIRLY FLAT OVER THE MARITIMES AHEAD
OF WEAK TROUGHING APPROACHING FROM THE WEST. LIGHT WINDS ARE
FORECAST WITH CONTINUED PATCHY MID AND HIGH CLOUD OVER THE REGION
BECOMING A MORE EXTENSIVE DURING THE DAY.
LONG RANGE DISCUSSION FOR 0300Z 18 SEP TO 0300Z 21 SEP.
MODEL DISCUSSION: USED GDPS.
CONFIDENCE: HIGH.
COMMENTS/IMPACTS: THE TROUGH APPROACHING FROM THE WEST MOVES THROUGH
THE MARITIMES ON FRIDAY. MODERATE TO PERHAPS STRONG SOUTH TO
SOUTHWEST WINDS AHEAD OF THE TROUGH SHIFT TO STRONG AND GUSTY
NORTHWEST WINDS IN ITS WAKE. TONIGHTS RDPS RUN SHOWS THESE
NORTHWEST WIND GUSTS MAY BRIEFLY NEAR GALE FORCE. SHOWERS ARE
FORECAST FOR MUCH OF THE DAY BEFORE TAPERING OFF IN THE AFTERNOON
AND THEN SKIES FINALLY CLEARING UP LATE IN THE DAY.
SATURDAY SEES RIDGING MOVING IN FROM THE WEST BRINGING DIMINISHING
NORTHWEST TO NORTH WINDS AND MAINLY SUNNY SKIES. ON SUNDAY THE
RIDGE EXITS TO THE EAST AND LIGHT WINDS BECOME LIGHT TO MODERATE
SOUTHERLY IN BEHIND IT. GENERALLY CLOUDY SKIES ARE FORECAST AS THE
NEXT TROUGH APPROACHES AND SHOWERS ARE POSSIBLE LATER IN THE DAY.
END/METOC-HFX
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