16 Dec 2014 - A broad trough and weak frontal system extending out of a 981 Gulf of Alaska low is moving onto the BC coast this morning. This weak system will produce rain and Gale Force southeasterlies around the west coast and northern Vancouver Island today. Overcast skies and intermittent showers will dominate the inner south coast throughout the day with more organized rain tonight. A 1022 mb high remains lodged over the BC interior and continues to produce outflow conditions through the mainland inlets and Juan de Fuca Strait. The northeast and easterly offshore flow should gradually ease today as the trough moves over the coastal area. Enough of an outflow will remain this morning to provide dry surface air, further weakening the advancing trough. The Polar jet remains split with the stronger stream pushing through California. This means the first of three advancing frontal systems will likely split and deliver cloud with intermittent showers again on Wednesday, preceded by a short period of clearing. By Thursday the jet will have moved more northward and become consolidated opening the door to a strong frontal system by late Thursday and an even stronger system by Saturday afternoon, overnight into Sunday. Timing is a little unsure at this time but it is looking like both systems are picking up sub-tropical moisture which will energize them to deep low storms. There is a possible game changer brewing in the tropics identified on the Pacific Water Vapour satellite image. Sustained winds speeds in knots (km/h in brackets) - West coast Vancouver Island winds strong ESE shifting NW this evening and easing to light. Winds becoming moderate SE late Wednesday. Showers becoming rain tonight ending before Wednesday morning. - Northwest Vancouver Island winds SE Gale Force to 35 (65) veering to moderate S this afternoon, backing SE by midday Wednesday. Seas to 4 meters. Showers. - Queen Charlotte Sound winds SE Gale Force to 40 (74) easing to strong this afternoon and to moderate overnight. Winds becoming strong SE on Wednesday morning. NE outflows through the mainland inlets will fall below Gale Force this afternoon. Showers. - Queen Charlotte Strait winds SE Gale Force to 40 (74) easing to strong this morning and to moderate this afternoon. Winds will strengthen on Wednesday evening. Intermittent showers. - Johnstone Strait winds moderate to strong SE. Intermittent showers. - Georgia Strait winds light to moderate SE, light to moderate E in the southern basin veering SE late tonight. Intermittent showers. - Haro Strait winds light to moderate NE. Intermittent showers. -Victoria waterfront winds strong E easing to light to moderate this morning. Intermittent showers becoming rain tonight. - Juan de Fuca Strait, Race Rocks to J Buoy, winds light to moderate E. Intermittent showers becoming rain tonight. Daily wisdom: An optimist is a fellow who believes a housefly is looking for a way to get out. - George Jean Nathan
Posted on: Tue, 16 Dec 2014 15:28:42 +0000
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