FPCN39 CWLW 311418
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 SATURDAY 31 OCTOBER 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 12 6 500 1 61 12 1300 6
KAMLOOPS KEL 11 6 550 1 71 12 1800 6
OKANAGAN KEL 10 4 450 1 71 12 1800 6
CASTLEGAR SPOK 13 5 900 1 51 11 1750 4
CRANBROOK SPOK 9 0 950 7 57 8 1950 6
REVELSTOKE KEL 10 5 550 1 19 6 650 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
PENTICTON S 9 S 22 SW 39
CRANBROOK SW 9 W 19
TODAY'S VENTING: GOOD IN THE WEST. POOR TO FAIR IN THE EAST.
VENTING FOR SATURDAY: GOOD
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. 45 4 1550 7 98 8 2500 11
PR. GEORGE P.G. 23 3 1100 4 42 6 1500 5
SMITHERS P.G. 9 2 550 1 36 4 1200 8
WELLS GRAY P.G. 47 4 1650 7 100 8 2650 11
FT NLSN F.N. 9 -5 400 21 47 -1 600 21
FT STJOHN F.N. 9 -4 700 21 70 0 1650 12
*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 S 44 S 41
SMITHERS S 54 S 41
TODAY'S VENTING: GOOD IN THE SOUTH. FAIR IN THE NORTH.
VENTING FOR SATURDAY: GOOD
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 18 8 200 9 32 11 350 10
FRASER VLY QUIL 16 6 150 9 29 11 300 9
SRN VRISL QUIL 18 6 150 8 29 11 250 9
CNTRL VRISL QUIL 22 9 200 9 29 11 300 9
NRN VRISL HRDY 9 8 0 19 60 10 400 19
TERRACE ANT 9 3 200 29 29 4 200 29
STEWART ANT 9 5 0 16 19 4 1000 16
*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 SE 31 S 50 S 52
PORT HARDY S 91 S 109 SW 98
SANDSPIT S 59 S 67 S 72
TODAY'S VENTING: GOOD IN EXPOSED COASTAL AREAS OTHERWISE POOR.
VENTING FOR SATURDAY: GOOD
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/MWSO