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FPCN39 CWLW 131432
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 PDT SUNDAY 13 APRIL 1997 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 11 200 13 100 16 2700 15
KAMLOOPS KEL 100 12 1900 12 100 16 3350 17
OKANAGAN KEL 81 11 1400 11 100 15 2850 16
CASTLEGAR SPOK 9 8 850 0 83 14 1900 8
CRANBROOK SPOK 9 6 950 11 100 12 3950 16
REVELSTOKE KEL 9 5 450 13 76 10 1400 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 SUNDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON SW 13 W 26 W 43
CRANBROOK W 20 W 54
TODAY'S VENTING: GOOD THIS AFTERNOON DUE TO THE PASSAGE OF A COLD
FRONT.
VENTING FOR MONDAY: 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. 10 6 1000 10 80 9 3700 10
PR. GEORGE P.G. 9 7 700 2 50 9 2700 2
SMITHERS P.G. 14 5 750 2 35 9 1100 4
WELLS GRAY P.G. 10 6 1100 8 80 7 4000 10
FT NLSN F.N. 15 -3 500 12 60 1 1250 12
FT STJOHN F.N. 92 3 2100 10 95 5 2450 9
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE W 17 W 28
SMITHERS VR 5 SW 28
TODAY'S VENTING: GOOD THIS AFTERNOON EXCEPT ONLY OVER NORTHERN
SECTIONS OF THE CENTRAL INTERIOR.
VENTING FOR MONDAY: GOOD
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 100 11 850 46 100 13 1350 44
FRASER VLY QUIL 100 11 800 39 100 13 1300 40
SRN VRISL QUIL 83 10 450 27 100 13 1200 36
CNTRL VRISL QUIL ## ## ### ## 100 12 1000 36
NRN VRISL HRDY 27 7 400 5 100 11 1700 13
TERRACE ANT 9 6 200 10 92 9 1500 11
STEWART ANT 10 6 50 4 45 9 600 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 SUNDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SW 28 SW 37 W 46
PORT HARDY S 48 SW 54 SW 52
SANDSPIT E 17 NE 15 E 19
TODAY'S VENTING: GOOD TODAY DUE TO AN UNSTABLE AIRMASS.
VENTING FOR MONDAY: 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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