FPCN39 CWLW 041351
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 MONDAY 4 JANUARY 1999 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 -1 200 4 9 1 200 4
KAMLOOPS KEL 9 -1 350 4 14 0 450 4
OKANAGAN KEL 14 0 450 4 40 1 850 7
CASTLEGAR SPOK 9 -1 800 0 9 0 850 0
CRANBROOK SPOK 9 -7 950 10 9 -5 950 10
REVELSTOKE KEL 9 -2 450 4 10 -1 450 4
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON W 11 W 33 NW 52
CRANBROOK W 17 NW 57
TODAY'S VENTING: POOR.
VENTING FOR TUESDAY: FAIR.
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. 9 0 950 25 9 1 950 25
PR. GEORGE P.G. 9 1 700 10 26 2 850 10
SMITHERS P.G. 9 1 500 0 9 1 500 0
WELLS GRAY P.G. 9 0 950 25 9 2 1000 25
FT NLSN F.N. 9 -16 750 0 19 -15 800 3
FT STJOHN F.N. 31 -7 1100 6 44 -1 1250 8
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE W 59 W 67
SMITHERS SW 61 W 67
TODAY'S VENTING: POOR.
VENTING FOR TUESDAY: FAIR.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 9 4 100 1 10 6 200 1
FRASER VLY QUIL 9 4 50 1 10 7 200 1
SRN VRISL QUIL 9 6 150 0 9 8 200 0
CNTRL VRISL QUIL 9 4 100 0 9 6 150 0
NRN VRISL HRDY 9 6 100 0 19 8 300 4
TERRACE ANT 9 2 200 15 9 2 200 15
STEWART ANT 9 2 0 2 9 2 0 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 MONDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SW 9 W 33 W 46
PORT HARDY SW 30 W 39 W 52
SANDSPIT SW 41 W 46 W 48
TODAY'S VENTING: POOR.
VENTING FOR TUESDAY: FAIR.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/MWSO