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Article #837

Coastal BC -

#837
From: weather
Date: Thu, 08 Feb 1996 00:00
217 lines
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628 
Fpcn11 cwvr 090234
forecasts for coastal British Columbia issued by the Pacific weather
centre of Environment Canada at 7 PM PST Thursday 8 February 1996 for
tonight Friday and Saturday.
The next scheduled forecast will be issued at 5 AM Friday.

Synopsis for coastal BC.
  It's almost over...the front that soaked the south coast today is
sliding into the interior.  Rain is now tapering to showers and gusty
winds will develop overnight marking a welcome transition to a much
drier weather pattern.
  The ridge of high pressure forecast to poke up across the coast
from the southwest will bring back the sunshine.  This ridge is of a
completely different nature than the last one which kept the coast in
frigid arctic air for about a week.  Fridays ridge will be much
warmer but not nearly as strong and will likely begin breaking down
by the end of the weekend.
  On the north coast cool unstable air May produce a few showers or
flurries tonight.  Offshore another frontal system will clip the
northern Charlottes and perhaps northernmost part of the mainland
Friday and Saturday.  But further south a mix of clouds and sun is
expected.

Freezing level..south..1700 metres lowering to 900 metres overnight. 
North..300 metres.

Greater Vancouver.
Tonight..evening showers then clear periods developing overnight.
 Gusty west wind developing. Low 2.
Friday..morning cloud then mainly sunny. High 9.
Saturday..sunny with cloudy periods. Low near zero. High 11.
Probability of precipitation in percent 80 tonight. 20 Friday and
 zero Saturday.

Greater Victoria.
Tonight..evening showers then clear periods developing overnight.
 Gusty west wind. Low 1.
Friday..sunny with morning cloudy periods. High 10.
Saturday..sunny with cloudy periods. Low zero. High 10.
Probability of precipitation in percent 90 tonight. 10 Friday and
 zero Saturday.

Lower Fraser Valley.
Tonight..rain tapering to a few showers early this evening.
 Gusty westerly wind developing. Low near 2.
Friday..cloudy with a chance of morning showers mainly eastern
 sections. Afternoon sunny periods. Breezy in the morning.
 High near 10.
Saturday..sunny with cloudy periods. Low minus 1. High near 10.
Probability of precipitation in percent 90 tonight. 40 Friday and
 zero Saturday.

Whistler.
Tonight..evening showers then clear periods developing. Chance of
 flurries overnight. Low minus 1.
Friday..cloudy with sunny periods. Slight chance of a morning flurry.
 Locally windy. High near 3.
Saturday..sunny with cloudy periods. Low near minus 5. High near 2.
Probability of precipitation in percent 90 tonight. 30 Friday and
 zero Saturday.

Howe Sound.
Tonight..evening showers then clear periods developing overnight.
 Gusty wind developing. Low near 1.
Friday..cloudy with sunny periods. Slight chance of a morning shower.
 Gusty south wind in the morning. High near 8.
Saturday..sunny with cloudy periods. Low near minus 2. High near 9.
Probability of precipitation in percent 80 tonight. 30 Friday and
 zero Saturday.

Sunshine Coast
east Vancouver Island.
Tonight..evening showers then clear periods developing overnight.
 Breezy. Low near 1.
Friday..sunny with cloudy periods. Wind diminishing. High near 10.
Saturday..sunny with cloudy periods. Low near minus 2. High near 10.
Probability of precipitation in percent 80 tonight. 10 Friday and
 zero Saturday.

West Vancouver Island.
Tonight..cloudy periods. Chance of an evening shower. Windy. Low 2.
Friday..sunny with cloudy periods. Windy in the morning. High near 8.
Saturday..cloudy with sunny periods. Low zero to 3. High near 8.
Probability of precipitation in percent 40 tonight. 10 Friday and
 zero Saturday.

North Vancouver Island.
Tonight..cloudy periods. Chance of a shower. Windy at times. Low 1.
Friday..cloudy with sunny periods. High near 8.
Saturday..cloudy with sunny periods. Low near 2. High near 8.
Probability of precipitation in percent 40 tonight. 20 Friday and
 10 Saturday.

Central coast.
Tonight..mainly cloudy. Chance of showers or flurries inland.
 Low near zero.
Friday..cloudy with sunny periods. High 4 to 7.
Saturday..cloudy with sunny periods. Windy. Low 2. High 5.
Probability of precipitation in percent 60 tonight. 20 Friday and
 20 Saturday.

North coast.
Tonight..mainly cloudy. A few showers or flurries. Chance of a
 thundershower and small hail near the coast. Windy. Low near zero.
Friday..mainly cloudy. Chance of showers or inland flurries northern
 sections. Southerly wind 30 km/h with gusts to 60 km/h developing
 along the coast. High 7 coast to 3 inland.
Saturday..mainly cloudy. Chance of rain north. Windy. Low near 2.
 High 5 to 9.
Probability of precipitation in percent 80 tonight. 60 Friday and
 60 Saturday.

Queen Charlottes.
Tonight..cloudy periods. Chance of showers or thundershowers and
 small hail. Breezy. Low 2.
Friday..mainly cloudy. Chance of a shower. Southerly wind 40 to
 60 km/h. High 7.
Saturday..rain north. Chance of rain south. Windy. Low near 5.
 High 9.
Probability of precipitation in percent 60 tonight. 40 Friday and
 90 Saturday.

End/dj


405 
fpcn50 cwvr 032130
mountain weather forecast for coastal British Columbia issued by the
Pacific weather centre of Environment Canada in Vancouver at 2:00 PM
PST Wednesday 3 January 1996 valid until midnight Thursday.  The next
scheduled forecast will be issued at 6:00 AM PST Thursday.

Precipitation intensity is forecast as an
hourly rate of snowfall water equivalent.
  Nil        light         moderate           heavy
no pcpn   up to 2.5 mm   2.5 to 7.5 mm   more than 7.5 mm

discussion.
A big upper ridge covers the gulf of Alaska with a northerly flow
over the coast. The ridge supports a 1040 mb arctic surface high
centered over the central yukon. This high centre will move to
north-central BC by Thursday afternoon. The arctic front extends
from near rosespit on the queen Charlottes to vicinty bella coola -
southeastwards. Overnight the central and southern portions will
push out to queen charlotte Sound on the central coast and strait of
georgia in the south. Cloud associated with the front May generate
some isolated light flurries over eastern slopes tonight. Otherwise
conditions will be mainly clear and cold with strong surface outflow
winds through the inlets and valleys.

Freezing level..surface central and north coasts. In the south near
1400 metres coast to 1000 metres inland lowering to 600 metres coast
and surface inland overnight and Thursday.

Extended outlook.
On Friday the surface high will move to central sask and the upper
high will drift eastward allowing overrunning cloud on the next
series of fronts to reach the coast in the evening and precipitation
to spread onto the coast overnight. On sat the upper high will move
inland bringing a mild southwest flow over the coast with rising
freezing levels and significant precipitation. The front will move
inland early sun leaving the coast under an unstable showery and
somewhat cooler pattern again.

South coast mountains.
Warnings.. None.
Occasional light flurries eastern slopes this evening then nil.
Mountaintop winds..northwest 20 km/h becoming northeast 20 km/h
overnight. Outflow winds 30 to 40 km/h at the surface.

Location        precip to 4am   precip 4am-4pm   min  max
                Thursday          Thursday
squamish        nil             nil              -3    -1
duffey lk       0-1             nil             -10    -7
allison pass    0-1             nil              -5    -3
Fraser canyon   nil             nil              -2     0

central coast mountains.
Warnings.. Artic outflow warning.
Occasional light flurries eastern slopes this evening then nil.
Mountaintop winds..northeast 30 to 40 km/h. Outflow winds 50 to 80
km/h at the surface.

Location        precip to 4am   precip 4am-4pm   min  max
                Thursday          Thursday
heckman pass    0-1             nil             -12    -9

north coast mountains.
Warnings.. Artic outflow warning.
Nil tonight and thurs.
Mountaintop winds..northeast 30 to 40 km/h becoming easterly 30 to
40 km/h overnight. Outflow winds 60 to 90 km/h at the surface.

Location        precip to 4am   precip 4am-4pm   min  max
                Thursday          Thursday
terrace tyee    nil             nil              -6    -2
bear pass       nil             nil             -11    -8
ningunsaw pass  nil             nil             -16   -11
telegraph crk   nil             nil             -17    -6

confidence..good. Fairly straightfoward dry arctic pattern in the
short term. Tempertures in the north might be a little colder.
Details of the breakdown fri night and sat still a little uncertain
but thickness pattern and advections indicate freezing levels near
1800 metres in the south and 1500 metres in the north for sat
afternoon.  In addition there's a good chance of some freezing rain
with this situation.

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/db
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From: weather@wimsey.com
Subject: Coastal BC -
Date: 1996/02/08
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