FPCN39 CWLW 051434
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 Saturday 5 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 12 22 500 1 89 30 3400 15
KAMLOOPS KEL 17 23 750 2 80 30 3600 11
OKANAGAN KEL 15 22 650 2 80 30 3600 11
CASTLEGAR SPOK 20 21 900 3 85 30 3450 11
CRANBROOK SPOK 9 20 950 7 87 27 3050 11
REVELSTOKE KEL 10 19 500 1 90 27 3350 11
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON VR 5 SW 17 SW 30
CRANBROOK VR 5 S 17
INVERSION HT BREAKTHRU TEMP
KELOWNA 1700 m 29 C
SPOKANE 1500 m 29 C
TODAY'S VENTING: POOR BECOMING GOOD LATE AFTERNOON.
VENTING FOR SUNDAY: GOOD.
VENTING OUTLOOK MONDAY THRU WEDNESDAY: 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. 9 19 950 6 100 26 3950 9
PR. GEORGE P.G. 11 18 800 2 85 25 1450 11
SMITHERS P.G. 13 19 800 2 90 25 1100 12
WELLS GRAY P.G. 9 19 1000 6 100 27 4000 8
FT NLSN F.N. 29 19 750 6 68 25 1700 11
FT STJOHN F.N. 34 20 1100 7 100 27 3700 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 SATURDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE S 26 S 28
SMITHERS SW 20 SW 28
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 1200 m 26 C
FT. NELSON 900 m 22 C
TODAY'S VENTING: POOR BECOMING GOOD LATE IN THE AFTERNOON.
VENTING FOR SUNDAY: GOOD.
VENTING OUTLOOK MONDAY THRU WEDNESDAY: GOOD.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 46 19 850 6 73 22 1950 9
FRASER VLY QUIL 47 19 850 6 78 24 2050 9
SRN VRISL QUIL 45 19 800 5 72 22 1950 9
CNTRL VRISL QUIL 46 20 850 5 78 25 2150 9
NRN VRISL HRDY 14 14 200 3 82 17 2300 9
TERRACE ANT 11 20 450 1 87 23 2000 9
STEWART ANT 11 17 100 3 88 23 1700 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 SATURDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SW 19 SW 22 SW 31
PORT HARDY SW 17 S 28 S 35
SANDSPIT SW 15 S 22 S 30
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 1500 m 28 C
PORT HARDY 1500 m 24 C
ANNETTE 300 m 20 C
TODAY'S VENTING: FAIR BECOMING GOOD IN THE AFTERNOON.
VENTING FOR SUNDAY: GOOD.
VENTING OUTLOOK MONDAY THRU WEDNESDAY: GOOD.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/JMS