MCIR <3> 3
FPCN39 CWLW 231347
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 PST TUESDAY 23 FEBRUARY 1999 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 80 5 200 18 80 8 2350 19
KAMLOOPS KEL 87 5 950 8 60 9 2700 9
OKANAGAN KEL 33 4 500 8 60 8 2550 10
CASTLEGAR SPOK 9 2 500 8 56 5 2250 9
CRANBROOK SPOK 10 0 950 8 60 4 2050 8
REVELSTOKE KEL 9 2 450 8 75 4 2200 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 TUESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON W 11 W 24 W 43
CRANBROOK W 19 W 48
TODAY'S VENTING: GOOD.
VENTING FOR WEDNESDAY: FAIR.
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. 70 0 2350 8 80 4 3950 10
PR. GEORGE P.G. 70 2 2100 8 80 5 3700 10
SMITHERS P.G. 60 0 2500 6 80 4 2300 10
WELLS GRAY P.G. 70 2 2100 8 80 4 4000 10
FT NLSN F.N. 31 -6 700 8 37 -5 750 8
FT STJOHN F.N. 64 0 1250 12 89 3 1800 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 TUESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE W 35 W 50
SMITHERS SW 28 SW 50
TODAY'S VENTING: GOOD EXCEPT FAIR FORT NELSON REGION.
VENTING FOR WEDNESDAY: FAIR.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 62 6 550 8 80 9 1550 10
FRASER VLY QUIL 59 6 500 8 80 9 1450 10
SRN VRISL QUIL 48 6 400 10 80 9 1350 10
CNTRL VRISL QUIL 9 4 50 7 80 8 1150 10
NRN VRISL HRDY 27 4 250 8 80 6 1050 10
TERRACE ANT 10 2 200 10 82 3 1250 10
STEWART ANT 10 2 200 10 80 3 1220 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 TUESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER S 17 SW 22 W 30
PORT HARDY S 31 S 39 SW 37
SANDSPIT S 41 S 41 S 37
TODAY'S VENTING: GOOD.
VENTING FOR WEDNESDAY: GOOD.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/JMS