FPCN39 CWLW 221325
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 PDT THURSDAY 22 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 20 8 550 3 36 14 1150 3
KAMLOOPS KEL 18 7 700 3 29 11 1050 3
OKANAGAN KEL 25 8 900 3 31 12 1150 3
CASTLEGAR SPOK 9 7 500 4 23 12 850 4
CRANBROOK SPOK 9 4 950 2 39 11 950 7
REVELSTOKE KEL 10 5 450 3 23 8 950 3
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON VR 5 S 11 S 9
CRANBROOK VR 5 VR 5
TODAY'S VENTING: POOR TO FAIR
VENTING FOR FRIDAY: 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. 9 6 950 25 10 14 950 15
PR. GEORGE P.G. 18 6 850 7 50 14 1100 12
SMITHERS P.G. 9 6 750 0 52 14 1050 10
WELLS GRAY P.G. 9 6 1000 25 10 13 1000 15
FT NLSN F.N. 15 4 450 10 45 10 800 10
FT STJOHN F.N. 25 8 850 10 77 16 1700 10
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE SW 22 SW 39
SMITHERS S 30 SW 39
TODAY'S VENTING: FAIR TO POOR EXCEPT GOOD IN THE PEACE
VENTING FOR FRIDAY: FAIR
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 15 11 150 11 24 17 200 11
FRASER VLY QUIL 20 13 150 11 40 22 400 10
SRN VRISL QUIL 18 11 100 9 29 18 250 10
CNTRL VRISL QUIL 20 12 150 10 29 19 250 10
NRN VRISL HRDY 9 9 0 7 21 14 200 7
TERRACE ANT 9 6 200 27 10 11 250 27
STEWART ANT 9 7 50 0 11 11 100 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 THURSDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SE 15 S 19 SW 17
PORT HARDY S 37 S 41 S 46
SANDSPIT S 57 S 61 S 65
TODAY'S VENTING: POOR LOCALLY FAIR
VENTING FOR FRIDAY: FAIR
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/MWSO