FPCN39 CWLW 171352
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 17 MARCH 1998 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 SPOK 39 6 750 6 80 11 1500 8
KAMLOOPS SPOK 67 9 1300 8 100 12 2500 10
OKANAGAN SPOK 39 8 850 7 100 12 2500 10
CASTLEGAR SPOK 27 5 800 7 90 9 1950 10
CRANBROOK SPOK 58 4 1650 9 100 8 3950 11
REVELSTOKE SPOK 31 6 800 7 79 9 1750 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 VR 5 NE 19 E 31
CRANBROOK NE 19 NE 54
TODAY'S VENTING: FAIR BECOMING GOOD BY AFTERNOON.
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. 9 1 950 10 42 6 1350 10
PR. GEORGE P.G. 9 0 700 5 55 6 1450 7
SMITHERS P.G. 11 -1 650 2 31 4 1050 5
WELLS GRAY P.G. 9 1 1000 10 64 7 2500 6
FT NLSN F.N. 9 1 400 1 58 8 2150 4
FT STJOHN F.N. 9 1 700 0 17 4 1550 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 TUESDAY AFTERNOON (WINDS IN KM/H):
900M 1800M 2700M
PR. GEORGE VR 5 VR 5
SMITHERS SE 19 S 5
TODAY'S VENTING: FAIR
VENTING FOR WEDNESDAY: POOR.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI TMP MXG HT WND VI TMP MXG HT WND
(MASL) (KT) (MASL) (KT)
VANCOUVER QUIL 22 7 250 8 88 13 1800 8
FRASER VLY QUIL 34 8 400 8 87 13 1750 8
SRN VRISL QUIL 15 7 250 3 80 13 1650 7
CNTRL VRISL QUIL 15 7 250 3 71 12 1450 6
NRN VRISL HRDY 26 7 550 4 58 10 1050 8
TERRACE ANT 9 3 250 6 80 7 1300 10
STEWART ANT 11 5 200 1 40 7 750 5
*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 N 13 NE 19 NE 19
PORT HARDY VR 5 SE 9 NW 9
SANDSPIT S 44 S 44 S 41
TODAY'S VENTING: GOOD
VENTING FOR WEDNESDAY: FAIR
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
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