FPCN39 CWLW 141431
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 Monday 14 July 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 26 23 750 3 76 27 1850 6
KAMLOOPS KEL 21 21 750 3 82 26 2050 7
OKANAGAN KEL 18 20 650 3 82 26 2050 7
CASTLEGAR SPOK 23 20 800 5 37 26 1150 5
CRANBROOK SPOK 9 18 950 8 69 24 2050 8
REVELSTOKE KEL 9 16 450 3 25 22 900 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 VR 5 SW 15 W 24
CRANBROOK SW 9 W 22
INVERSION HT BREAKTHRU TEMP
KELOWNA 1000 m 24 C
SPOKANE 1000 m 23 C
TODAY'S VENTING: fair to good.
VENTING FOR TUESDAY: good.
VENTING OUTLOOK WEDNESDAY THRU FRIDAY: generally 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. 92 17 1850 17 100 21 3950 17
PR. GEORGE P.G. 39 17 1200 7 100 21 3700 15
SMITHERS P.G. 23 16 800 6 72 20 1500 9
WELLS GRAY P.G. 98 17 2000 17 100 22 4000 17
FT NLSN F.N. 9 18 400 18 76 21 900 19
FT STJOHN F.N. 100 19 1400 25 100 24 3700 31
*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 20 W 28
SMITHERS W 20 W 28
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 1100 m 18 C
FT. NELSON 900 m 22 C
TODAY'S VENTING: good.
VENTING FOR TUESDAY: good.
VENTING OUTLOOK WEDNESDAY THRU FRIDAY: good.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 52 19 800 7 71 22 1250 8
FRASER VLY QUIL 50 19 800 7 78 24 1450 8
SRN VRISL QUIL 36 17 600 5 66 22 1200 7
CNTRL VRISL QUIL 54 20 900 6 80 25 1550 7
NRN VRISL HRDY 9 16 0 3 56 19 1200 7
TERRACE ANT 45 17 1300 4 71 21 2100 5
STEWART ANT 39 17 950 4 63 21 1650 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
VANCOUVER SW 11 SW 15 W 26
PORT HARDY W 13 SW 17 SW 19
SANDSPIT W 19 SW 19 SW 24
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE none
PORT HARDY 2000 m 19 C
ANNETTE none
TODAY'S VENTING: good.
VENTING FOR TUESDAY: good.
VENTING OUTLOOK WEDNESDAY THRU FRIDAY: good.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/dsl