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FPCN39 CWLW 111530
SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE
NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF
ENVIRONMENT CANADA AT 8:00 AM PST WEDNESDAY 11 DECEMBER 1996 FOR
TODAY.
VENTILATION INDICES (TEMPERATURE) AND MIXING HEIGHTS.
MIXING HEIGHTS IN METRES ABOVE SEA LEVEL.
AVERAGE WINDS IN KNOTS.
SPOT INDICES ARE DETERMINED BY THE ASPECT AND ELEVATION OF THE SITES.
COMPARE WINDS, TEMPERATURES AND ELEVATION WITH THE SITES HERE
TO DETERMINE THE INDEX IN ANY OTHER AREA.
SOUTHERN INTERIOR
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
FRSR CANYN KEL 9 3 200 2 16 5 500 2
KAMLOOPS KEL 9 2 350 2 13 4 550 2
OKANAGAN KEL 9 -1 350 2 9 2 350 2
CASTLEGAR SPOK 40 2 800 12 51 3 900 12
CRANBROOK SPOK 44 0 1100 28 65 1 1200 28
REVELSTOKE KEL 9 -1 450 2 9 -1 450 2
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON SE 9 S 15 SW 31
CRANBROOK W 15 W 43
TODAY'S VENTING: FAIR TO GOOD AT HIGH ELEVATION SITES AND POOR AT
LOW ELEVATIONS.
VENTING FOR THURSDAY: POOR.
CENTRAL INTERIOR/NORTHEAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
WILLIAMS L P.G. 10 -2 950 15 69 0 1600 12
PR. GEORGE P.G. 9 -3 700 0 9 -1 700 0
SMITHERS P.G. 9 -6 550 0 23 -2 1000 3
WELLS GRAY P.G. 69 1 1700 12 10 -1 1000 15
FT NLSN F.N. 9 -14 400 5 9 -14 400 5
FT STJOHN F.N. 10 -16 700 14 63 -12 1200 14
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE SW 43 SW 44
SMITHERS S 43 SW 44
TODAY'S VENTING: FAIR TO GOOD AT HIGH ELEVATION SITES AN POOR AT
LOWER ELEVATIONS.
VENTING FOR THURSDAY: POOR
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 9 5 100 18 55 7 1675 18
FRASER VLY QUIL 9 5 50 18 57 7 1600 18
SRN VRISL QUIL 15 4 150 5 56 8 1675 12
CNTRL VRISL QUIL 9 2 50 5 62 4 2450 5
NRN VRISL HRDY 14 4 150 4 63 6 2250 4
TERRACE ANT 18 0 200 3 64 1 2300 8
STEWART ANT 15 2 100 2 55 1 1700 7
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR WEDNESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SE 33 S 35 S 43
PORT HARDY S 44 S 56 S 56
SANDSPIT S 43 S 46 S 50
TODAY'S VENTING: GOOD
VENTING FOR THURSDAY: GOOD
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/MWSO
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2 - Smoke Forecast, Interior
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