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Article #842

Coastal BC -

#842
From: weather
Date: Sun, 11 Feb 1996 00:00
225 lines
9964 bytes
554 
Fpcn11 cwvr 120230
forecasts for coastal British Columbia issued by the Pacific weather
centre of Environment Canada at 7 PM PST Sunday 11 February 1996 for
tonight Monday and Tuesday.
The next scheduled forecast will be issued at 5 AM Monday.

Synopsis for coastal BC.
   Temperatures across the south coast ranged from 9 to 13 degrees
this afternoon..about three to five degrees above normal February
values. Even on the north coast high temperatures broke the double
digit mark in a few locations. A strong ridge of high pressure 
over the interior of the province will give continued summer-like
weather to the south for several more days. Occasional bands of high
cloud will make it over the ridge but overall sunny mild weather is
expected across the south through Tuesday.
     The ridge is deflecting weak Pacific frontal systems onto the
Alaska panhandle. The north coast is being brushed by cloud and some
showers or flurries from these systems. The precipitation is heaviest
in the extreme northern part of the coast where inland local
snowfall totals could approach 10 centimetres before the snow changes
to rain. As the ridge continues to strengthen it will push the fronts
slightly farther to the north resulting in decreased precipitation.

Freezing level..south..near 2900 metres.  North..1500 metres coast
rising to 2200 metres Monday.  Near freezing layers surface to 800
metres inland.

Greater Vancouver.
Tonight..high clouds. Low minus 1 to plus 3.
Monday..sunny with high clouds. High 8 to 12.
Tuesday..sunny with occasional high cloudiness. Low minus 1 to
 plus 3. High 9 to 13.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

Greater Victoria.
Tonight..high clouds. Low minus 1 to plus 4.
Monday..sunny with high clouds. Locally gusty wind in the morning.
 High 9 to 14.
Tuesday..occasional high cloudiness. Patchy fog. Low minus 2 to
 plus 3. High 9 to 13.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

Lower Fraser Valley.
Tonight..high clouds. Locally gusty outflow wind. Low minus 1
 to plus 4.
Monday..sunny with high clouds. Locally gusty outflow wind. High 10
 to 14.
Tuesday..sunny with occasional high cloudiness. Locally windy.
 Low zero to plus 4. High 9 to 13.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

Whistler.
Tonight..high clouds. Low minus 3.
Monday..sunny with high clouds. High 8.
Tuesday..sunny with occasional high cloudiness. Low minus 3. High 8.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

Howe Sound.
Tonight..high clouds. Outflow wind locally 50 km/h overnight.
 Low zero to 6.
Monday..sunny with high clouds. Outflow wind locally 60 km/h in the
 morning. High 14.
Tuesday..sunny with occasional high cloudiness. Low zero to plus 4. 
 High 9 to 13.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

Sunshine Coast
east Vancouver Island.
Tonight..high clouds. Low minus 4 to plus 2.
Monday..sunny with high clouds. Morning fog patches. High 9 to 14
 inland.
Tuesday..sunny with cloudy periods. Patchy fog. Low minus 2 to
 plus 2. High 9 to 13.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

West Vancouver Island.
Tonight..cloudy periods. Low minus 1 to plus 4.
Monday..sunny with high clouds. Morning fog patches. High 8 to 13.
Tuesday..sunny with cloudy periods. Patchy fog. Low minus 2 to
 plus 3. High 8 to 12.
Probability of precipitation in percent zero tonight. Zero Monday and
 zero Tuesday.

North Vancouver Island.
Tonight..mainly cloudy. Locally windy exposed areas. Low minus 2 to
 plus 3.
Monday..cloudy with sunny periods. High 8 to 13 inland.
Tuesday..sunny with cloudy periods. Low near 1. High 8 to 12 inland.
Probability of precipitation in percent 20 tonight. 10 Monday and
 10 Tuesday.

Central coast.
Tonight..mainly cloudy. Low 5 coast to minus 4 inland.
Monday..cloudy with sunny periods. High near 8.
Tuesday..a mix of sun and cloud . Low 3 coast to minus 4 inland.
 High near 8.
Probability of precipitation in percent 20 tonight. 20 Monday and
 20 Tuesday.

North coast - coastal sections.
Tonight..cloudy with a few showers. Low 5.
Monday..mainly cloudy with showers northern sections. Chance of
 showers southern sections. High 11.
Tuesday..mainly cloudy. Chance of showers. Low 4. High 10.
Probability of precipitation in percent 80 tonight. 80 Monday and
 60 Tuesday.

North coast - inland sections.
Tonight..cloudy with flurries or showers. Local snowfall
 accumulations 6 to 10 cm northern sections. Low minus 2.
Monday..mainly cloudy. Flurries or showers with risk of freezing rain
 north. Chance of showers south. High 3.
Tuesday..mainly cloudy. Showers or wet flurries north.  Chance of
 showers south. Low minus 1. High near 4.
Probability of precipitation in percent 80 tonight. 80 Monday and
 80 Tuesday.

Queen Charlottes.
Tonight..periods of rain. Locally windy. Low 5.
Monday..cloudy with showers. Locally windy. High 9.
Tuesday..cloudy. Showers likely. Locally windy. Low 6. High 10.
Probability of precipitation in percent 90 tonight. 80 Monday and
 70 Tuesday.

End/bdr


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: 1996/02/11
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