FPCN39 CWLW 231328
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 PDT TUESDAY 23 JUNE 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 KEL 19 18 500 3 100 27 2500 8
KAMLOOPS KEL 21 19 600 5 100 26 2550 8
OKANAGAN KEL 16 18 600 3 100 26 2550 8
CASTLEGAR SPOK 35 18 850 8 75 24 1550 9
CRANBROOK SPOK 9 14 950 11 100 22 3950 8
REVELSTOKE KEL 13 17 550 3 74 22 1750 7
*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 9 W 17 W 22
CRANBROOK W 9 W 22
INVERSION HT BREAKTHRU TEMP
KELOWNA 640 m 18 C
SPOKANE 1200 m 20 C
TODAY'S VENTING: GOOD
VENTING FOR WEDNESDAY: GOOD
VENTING OUTLOOK THURSDAY THRU SATURDAY: FAIR BECOMING 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. 89 16 1800 16 100 22 3950 14
PR. GEORGE P.G. 51 15 1100 12 100 21 3700 14
SMITHERS P.G. 9 12 500 4 72 19 1300 11
WELLS GRAY P.G. 100 17 4000 14 100 23 4000 14
FT NLSN F.N. 45 17 550 29 100 23 3400 26
FT STJOHN F.N. 10 15 700 32 100 23 3700 25
*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 SW 28 SW 41
SMITHERS W 31 W 41
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 700 m 14 C
FT. NELSON 600 m 19 C
TODAY'S VENTING: GOOD
VENTING FOR WEDNESDAY: GOOD
VENTING OUTLOOK THURSDAY THRU SATURDAY: FAIR BECOMING GOOD
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 56 15 900 7 78 20 1550 7
FRASER VLY QUIL 59 16 1000 7 83 21 1750 7
SRN VRISL QUIL 32 15 850 3 45 20 1400 3
CNTRL VRISL QUIL 34 16 950 3 45 20 1450 3
NRN VRISL HRDY 9 12 0 3 55 15 850 7
TERRACE ANT 57 13 1100 7 70 19 1650 6
STEWART ANT 55 14 800 7 73 19 1500 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 TUESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER SW 17 W 17 W 22
PORT HARDY SW 17 W 24 W 39
SANDSPIT W 41 W 48 W 52
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 000 m 19 C
PORT HARDY 000 m 19 C
ANNETTE 000 m 19 C
TODAY'S VENTING: GOOD
VENTING FOR WEDNESDAY: GOOD
VENTING OUTLOOK THURSDAY THRU SATURDAY: GOOD
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
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