FPCN39 CWLW 131434
SMOKE CONTROL FORECAST FOR COASTAL BC AND THE INTERIOR INCLUDING THE
NORTHEAST ISSUED BY THE MOUNTAIN WEATHER SERVICE OFFICE OF
ENVIRONMENT CANADA AT 7:00 AM PST FRIDAY 13 NOVEMBER 1998 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 8 200 0 40 11 500 15
KAMLOOPS KEL 9 6 350 0 34 10 500 12
OKANAGAN KEL 9 7 350 0 9 10 500 0
CASTLEGAR SPOK 9 6 500 15 9 9 500 15
CRANBROOK SPOK 9 4 950 10 9 7 950 10
REVELSTOKE KEL 9 6 450 0 9 8 450 0
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON SW 15 W 43 W 93
CRANBROOK W 31 W 93
TODAY'S VENTING: POOR EXCEPT IMPROVING TO FAIR AT KAMLOOPS AND OVER
THE FRASER CANYON.
VENTING FOR SATURDAY: 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. 15 3 1700 4 92 5 2200 12
PR. GEORGE P.G. 9 1 700 1 41 3 1150 8
SMITHERS P.G. 9 0 500 1 12 3 850 1
WELLS GRAY P.G. 73 2 1650 15 95 5 2350 12
FT NLSN F.N. 9 -13 400 8 10 -11 400 8
FT STJOHN F.N. 15 -7 800 2 20 -5 850 5
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE NW 20 NW 22
SMITHERS VR 5 NW 22
TODAY'S VENTING: POOR EXCEPT INCREASING TO FAIR THIS AFTERNOON AT
PRINCE GEORGE AND GOOD AT WILLIAMS LAKE AND WELLS GRAY.
VENTING FOR SATURDAY: POOR
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 9 11 100 22 9 12 100 22
FRASER VLY QUIL 9 10 50 22 9 12 50 22
SRN VRISL QUIL 9 11 0 20 9 12 0 20
CNTRL VRISL QUIL 9 11 50 20 9 12 50 20
NRN VRISL HRDY 26 8 200 10 40 11 900 12
TERRACE ANT 9 1 200 12 10 4 250 12
STEWART ANT 21 5 200 6 13 4 50 6
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SW 33 W 50 W 65
PORT HARDY NW 11 NW 17 W 33
SANDSPIT N 20 N 13 N 9
TODAY'S VENTING: POOR EXCEPT INCREASING TO FAIR OVER NORTHERN
VANCOUVER ISLAND.
VENTING FOR SATURDAY: POOR
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/