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Article #926

Re: Coastal BC -

#926
From: bc rail
Date: Fri, 29 Dec 1995 00:00
227 lines
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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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References: <P951128.172011.9382@vanbc.wimsey.com> <P951128.202013.17886@vanbc.wimsey.com>

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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>
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references: <P951128.172011.9382@vanbc.wimsey.com> <P951128.202013.17886@vanbc.wimsey.com>
organization: MIND LINK! - British Columbia, Canada
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