FPCN39 CWLW 151331
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 MONDAY 15 SEPTEMBER 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 15 200 2 97 17 1550 20
KAMLOOPS KEL 12 15 500 2 94 18 1550 13
OKANAGAN KEL 12 15 500 2 95 18 1500 13
CASTLEGAR SPOK 34 14 1050 5 82 17 2000 8
CRANBROOK SPOK 83 13 2050 10 99 16 2550 10
REVELSTOKE KEL 9 13 450 2 11 15 550 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
PENTICTON VR 5 SW 17 SW 28
CRANBROOK W 13 W 33
INVERSION HT BREAKTHRU TEMP
KELOWNA 800 m 17 C
SPOKANE none
TODAY'S VENTING: generally good.
VENTING FOR TUESDAY: good.
VENTING OUTLOOK WEDNESDAY THRU FRIDAY: decreasing to 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. 38 10 1300 9 91 12 2100 12
PR. GEORGE P.G. 9 5 700 2 91 10 2100 12
SMITHERS P.G. 9 8 500 1 91 10 2100 12
WELLS GRAY P.G. 27 9 1200 9 84 11 2000 12
FT NLSN F.N. 95 6 1500 14 95 9 1500 14
FT STJOHN F.N. 42 3 1050 11 84 6 1500 15
*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 SW 22 W 22
SMITHERS W 13 W 22
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 1200 m 13 C
FT. NELSON none
TODAY'S VENTING: good.
VENTING FOR TUESDAY: good.
VENTING OUTLOOK WEDNESDAY THRU FRIDAY: decreasing to fair.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER HRDY 72 16 1100 9 81 18 1700 7
FRASER VLY HRDY 75 17 1300 8 94 20 2150 7
SRN VRISL HRDY 64 16 900 8 84 19 1800 7
CNTRL VRISL HRDY 53 15 650 8 77 18 1550 7
NRN VRISL HRDY 30 13 350 8 64 16 900 8
TERRACE ANT 9 12 200 5 64 16 900 8
STEWART ANT 10 13 50 1 64 16 900 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
VANCOUVER S 13 SW 19 SW 17
PORT HARDY SW 17 W 19 W 19
SANDSPIT NW 22 NW 30 NW 30
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE missing
PORT HARDY 1600 m 16 C
ANNETTE 300 m 19 C
TODAY'S VENTING: good.
VENTING FOR TUESDAY: good.
VENTING OUTLOOK WEDNESDAY THRU FRIDAY: decreasing to poor.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
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