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Article #926Re: Coastal BC -
From: bc rail
Date: Fri, 29 Dec 1995 00:00
Date: Fri, 29 Dec 1995 00:00
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10334 bytes
In article <P951128.202013.17886@vanbc.wimsey.com> weather@wimsey.com writes: >From: weather@wimsey.com >Subject: Coastal BC - >Date: 28 Dec 1995 20:20:31 -0800 >303 >Fpcn11 cwvr 290236 >forecasts for coastal British Columbia issued by the Pacific weather >centre of Environment Canada at 7 PM PST Thursday 28 December 1995 >for tonight Friday and Saturday. >The next scheduled forecast will be issued at 5 AM Friday. >Synopsis for coastal BC. > A frontal system is moving across the coast this evening bringing >rain and strong southeasterly winds to many areas. The strongest >winds so far have been reported along the northwest coast of >Vancouver Island where they have reached speeds of 120 km/h with >gusts to 146 km/h. Wind warnings remain in effect for the coastal >areas from central Vancouver Island northward with the exception of >the queen Charlottes where the winds have eased behind the front. >The winds will ease over the remainder of the coast tonight as the >front moves inland. However precipitation will continue as the >airmass remains quite moist and unstable behind the front. >Inland the precipitation will fall as snow over higher elevations and >a snowfall warning continues for the Whistler area. The risk of some >patchy freezing rain continues for inland sections of the coast. > A weak ridge of high pressure will build along the coast Friday >afternoon and showers will decrease. However another low and >associated frontal system will bring more rain Saturday. >Temperatures will continue mild. >Freezing level..south..from 2300 metres over southern Vancouver >Island to near 1300 metres over the mainland coast. Rising to 1800 >metres over the mainland coast this evening then dropping to 1500 >metres Friday morning. North..near 1300 metres coast to surface >inland dropping to 1000 metres along the coast Friday. >Greater Vancouver. >Tonight..rain with amounts to 25 mm. Windy. Low 5. >Friday..rain easing to showers in the morning. High 9. >Saturday..periods of rain. Windy. Low 2. High 8. >Probability of precipitation in percent 100 tonight. 90 Friday and > 100 Saturday. >Greater Victoria. >Tonight..periods of rain. Windy. Low 4. >Friday..rain easing to a few showers in the morning. Locally windy. > High 10. >Saturday..periods of rain. Windy. Low 3. High 8. >Probability of precipitation in percent 100 tonight. 90 Friday and > 100 Saturday. >Lower Fraser Valley. >Tonight..rain with local amounts to 20 mm. Windy. Low 2. >Friday..rain easing to showers in the afternoon. High 6 to 9. >Saturday..periods of rain. Locally windy. Low zero. High 6. >Probability of precipitation in percent 100 tonight. 100 Friday and > 100 Saturday. >Whistler. >Snowfall warning in effect. >Tonight..periods of snow at times heavy this evening. Low minus 3. >Friday..periods of snow ending in the afternoon. Total snowfall > accumulations of 15 to 25 centimetres. High plus 1. >Saturday..periods of snow changing to rain at lower elevation in the > afternoon. Low minus 3. High plus 1. >Probability of precipitation in percent 100 tonight. 80 Friday and > 100 Saturday. >Howe Sound. >Tonight..rain with amounts to 35 mm. Low 2. >Friday..rain easing to a few showers in the morning. High 6. >Saturday..periods of rain. Low 2. High 7. >Probability of precipitation in percent 100 tonight. 100 Friday and > 100 Saturday. >Sunshine Coast >east Vancouver Island. >Wind warning in effect. >Tonight..southeast wind 50 to 80 km/h over northern sections easing > after midnight. Periods of rain. Low 3 to 6. >Friday..rain tapering to showers in the morning. High 9. >Saturday..periods of rain. Low 4. High 8. >Probability of precipitation in percent 100 tonight. 90 Friday and > 100 Saturday. >West Vancouver Island. >Wind warning in effect. >Tonight..rain with amounts to 30 mm. Wind southeast 60 to 90 km/h > over northern sections easing overnight. Low 6. >Friday..cloudy with showers. High 11 and 9 inland. >Saturday..rain. Windy. Low 4. High 11 coast and 5 inland. >Probability of precipitation in percent 100 tonight. 80 Friday and > 100 Saturday. >North Vancouver Island. >Wind warning in effect. >Tonight..wind southeast 60 to 100 km/h with gusts to 120 km/h over > exposed outer coast. Wind easing after midnight. Rain. Low 6. >Friday..cloudy with showers. Windy. High 9. >Saturday..rain. Windy. Low 4. High 9. >Probability of precipitation in percent 100 tonight. 80 Friday and > 100 Saturday. >Central coast - coastal sections. >Wind warning in effect. >Tonight..rain. Southeast wind 60 to 90 km/h easing overnight. Low 6. >Friday..cloudy with showers. Locally windy. High 9. >Saturday..periods of rain. Windy. Low 4. High 9. >Probability of precipitation in percent 100 tonight. 100 Friday and > 100 Saturday. >Central coast - inland sections. >Tonight..periods of rain at times mixed with snow. Low 2. >Friday..cloudy with showers. High 6. >Saturday..periods of rain at times mixed with snow. Low zero. High 3. >Probability of precipitation in percent 100 tonight. 90 Friday and > 100 Saturday. >North coast - coastal sections. >Wind warning in effect. >Tonight..wind locally northeast 60 to 80 km/h easing overnight. > Periods of rain. Low 5. >Friday..cloudy with showers. Locally windy. High 8. >Saturday..periods of rain. Windy. Low 4. High 6. >Probability of precipitation in percent 90 tonight. 80 Friday and > 100 Saturday. >North coast - inland sections. >Tonight..periods of snow. Patchy freezing rain this evening. Gusty > outflow wind 40 to 60 km/h easing overnight. Low minus 3. >Friday..periods of snow becoming mixed with rain in the afternoon. > Risk of freezing rain. High plus 2. >Saturday..cloudy with a chance of flurries. Temperature lowering to > minus 3 in the afternoon. >Probability of precipitation in percent 100 tonight. 100 Friday and > 60 Saturday. >Queen Charlottes. >Tonight..wind southerly 40 to 60 km/h easing this evening. Cloudy > with showers. Low 7. >Friday..cloudy with showers. Windy. High 9. >Saturday..periods of rain. Windy. Low 4. High 6. >Probability of precipitation in percent 100 tonight. 80 Friday and > 100 Saturday. >End/db >646 >fpcn50 cwvr 281357 >mountain forecast guidance for coastal British Columbia issued by the >Pacific weather centre of Environment Canada in Vancouver at 4 AM PST >Thursday 28 December 1995 valid until midnight Friday. >The next scheduled guidance will be issued at 2 PM today. >Synopsis. > A series of active trowals will cross from the sw today and >Friday. The first will be the weakest..in a wnw-ese line near 50n >135w at 4 AM forecast to weaken in a split flow as it moves to a >ketchikan to Lytton line by 4 PM this afternoon. The second and >stronger one..showing signs of developing near 40n 139w will move to >a nw-se line 150 miles sw of Vancouver Island by 4 PM this afternoon >then into the okanagan by 4 AM Friday. This stronger system will >affect the southern central coast and south coast. Most significant >precipitation amounts will be over the south coast as a significant >vorticity maximum will follow the trowal to lie near tofino at 4 AM >Friday then to nw montana by 4 PM Friday. Strong southeast winds >will shift to south to southwest in the low levels after the passage >of this second trowal and vort max. This will scour out cooler air >in south coast mainland valleys by early Friday. > Generally light convective precipitation will occur over the coast >Friday in the wake of this second feature as 500 mb heights start to >slowly rise. However late Friday another and possibly warmer system >will approach from the southwest spreading another band of >precipitation to the south. >Freezing level.. >South coast..near 1600 metres rising to 2300 metres tonight and > dropping to 1900 metres Friday morning. >North coast..1300 metres coast to surface inland rising overnight to > 1900 metres coast with near freezing layers to 1000 metres inland. >Extended outlook. >All numerical models continue to indicate a continuation of the >systems crossing the coast Saturday. Then a 500 mb ridge is expected >to build along the BC coast late Saturday and Sunday. This coupled >with light surface flow will allow low levels to cool with >subsidence inversion aloft. Any precipitation will be suppressed. A >warm front will cross the ridge from the southwest Monday bringing a >return to precipitation. >South coast mountains. >Warnings..snowfall warning. >Light today becoming moderate tonight and easing to light convective >Friday morning. Becoming light to moderate late Friday. >Mountaintop winds..southerly 20 km/h rising to 40 this morning and >to 50 to 70 late this afternoon. Winds south 50 km/h Friday. >Central coast mountains. >Warnings..none. >Light today and tonight except briefly moderate overnight. Light >convective Friday. >Mountaintop winds..southeasterly 40 to 60 km/h becoming southwest 40 >overnight. >North coast mountains. >Warnings..none. >Light today and tonight. Light convective Friday. >Mountaintop winds..southeasterly 30 to 50 km/h rising to 70 km/h >this morning and shifting to south 50 overnight. >Confidence..fair. Fair to poor with timing of systems after Friday >morning. Rapidly moving systems will be almost impossible to time to >late Saturday. System to affect south tonight still has to get >organized but all computer models are consistent in how they treat >it. >This mountain weather forecast was produced for BC >ministry of >transportation and highways, snow avalanche programs and applies >specifically to those areas in the forecast. If further information >or other products are required for local operations, please call >664-9033. >End/dt
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 100886,b8ed3df5ae311b9b X-Google-Attributes: gid100886,public From: bc_rail@mindlink.bc.ca (bc rail) Subject: Re: Coastal BC - Date: 1995/12/29 Message-ID: <bc_rail.1.30E38DEE@mindlink.bc.ca> X-Deja-AN: 123113567 references: <P951128.172011.9382@vanbc.wimsey.com> <P951128.202013.17886@vanbc.wimsey.com> organization: MIND LINK! - British Columbia, Canada newsgroups: bc.weather