FPCN39 CWLW 231434
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 23 August 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 63 22 1550 15 76 26 2150 15
KAMLOOPS KEL 15 22 800 1 61 27 2300 5
OKANAGAN KEL 12 21 650 1 60 28 2450 5
CASTLEGAR SPOK 25 21 750 7 59 29 2400 5
CRANBROOK SPOK 9 19 950 4 70 27 3950 9
REVELSTOKE KEL 9 17 500 1 68 22 2250 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 SATURDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON VR 5 SW 17 SW 30
CRANBROOK SW 13 SW 33
INVERSION HT BREAKTHRU TEMP
KELOWNA 1200 m 24 C
SPOKANE 1500 m 28 C
TODAY'S VENTING: GOOD
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. 80 17 1850 12 80 23 3950 10
PR. GEORGE P.G. 51 16 1100 12 80 22 3700 10
SMITHERS P.G. 37 16 900 8 90 21 2800 11
WELLS GRAY P.G. 88 17 2250 11 83 24 4000 10
FT NLSN F.N. 9 15 400 13 77 20 2000 10
FT STJOHN F.N. 16 15 750 10 75 19 2250 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 SATURDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE S 24 S 33
SMITHERS S 30 S 33
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 1200 m 19 C
FT. NELSON 1400 m 23 C
TODAY'S VENTING: GOOD
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 81 19 750 17 50 22 1650 12
FRASER VLY QUIL 89 20 850 17 50 23 2000 10
SRN VRISL QUIL 24 18 550 3 45 22 1400 12
CNTRL VRISL QUIL 18 17 350 3 50 23 1800 10
NRN VRISL HRDY 9 15 150 0 69 19 1650 12
TERRACE ANT 100 16 800 36 80 19 2600 15
STEWART ANT 43 15 250 16 80 19 2050 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 SATURDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER S 17 S 24 SW 41
PORT HARDY S 50 S 59 S 57
SANDSPIT S 80 S 82 S 83
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 800 m 19 C
PORT HARDY 400 m 16 C
ANNETTE 700 m 15 C
TODAY'S VENTING: FAIR TO GOOD.
VENTING FOR SUNDAY: FAIR TO 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