FPCN39 CWLW 241430
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 24 May 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 13 200 2 70 17 1700 6
KAMLOOPS KEL 62 15 1600 6 89 20 3350 5
OKANAGAN KEL 57 14 1200 7 79 18 2400 5
CASTLEGAR SPOK 31 13 1000 5 82 17 2250 7
CRANBROOK SPOK 34 10 1300 8 93 14 2750 8
REVELSTOKE KEL 52 13 1200 7 74 16 2150 6
*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 NW 9 N 19 N 28
CRANBROOK E 15 E 43
INVERSION HT BREAKTHRU TEMP
KELOWNA NO INVERSION
SPOKANE 1050 m 12 C
TODAY'S VENTING: GOOD THIS AFTERNOON.
VENTING FOR SUNDAY: GOOD
VENTING OUTLOOK MONDAY THROUGH WEDNESDAY: GOOD MONDAY AND TUESDAY
AFTERNOONS. FAIR WEDNESDAY AFTERNOON.
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. 17 12 1050 8 100 18 3950 7
PR. GEORGE P.G. 16 9 750 9 100 18 3700 8
SMITHERS P.G. 22 12 800 5 100 21 3500 7
WELLS GRAY P.G. 9 12 1000 8 100 19 4000 7
FT NLSN F.N. 40 13 700 11 66 20 1100 11
FT STJOHN F.N. 13 11 750 11 55 16 1050 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
PR. GEORGE NW 11 VR 5
SMITHERS W 17 W 5
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 1100 m 17 C
FT. NELSON 1280 m 23 C
TODAY'S VENTING: GOOD THIS AFTERNOON EXCEPT LOCALLY FAIR OVER THE
NORTHEAST.
VENTING FOR SUNDAY: GOOD
VENTING OUTLOOK MONDAY THROUGH WEDNESDAY: GOOD MONDAY AFTERNOON.
FAIR TO GOOD TUESDAY AFTERNOON. FAIR WEDNESDAY AFTERNOON.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 46 13 850 6 83 18 2450 5
FRASER VLY QUIL 45 13 800 6 97 21 3050 5
SRN VRISL QUIL 32 13 700 4 75 18 2300 4
CNTRL VRISL QUIL 59 15 1300 5 91 20 2850 5
NRN VRISL HRDY 16 12 500 2 41 17 800 5
TERRACE ANT 17 15 750 2 40 23 1900 2
STEWART ANT 16 15 650 1 24 23 1400 1
*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 W 20 NW 19 N 17
PORT HARDY NW 20 NW 19 N 19
SANDSPIT NW 20 W 20 NW 22
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 275 m 13 C
PORT HARDY 700 m 15 C
ANNETTE 915 m 20 C
TODAY'S VENTING: GOOD VENTING THIS AFTERNOON OVER THE SOUTH. FAIR IN
THE NORTH.
VENTING FOR SUNDAY: GOOD
VENTING OUTLOOK MONDAY THROUGH WEDNESDAY: FAIR IN THE AFTERNOONS.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/PLJ