FPCN39 CWLW 261337
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 FRIDAY 26 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 23 15 550 4 100 22 3200 6
KAMLOOPS KEL 70 17 1750 6 100 25 3350 6
OKANAGAN KEL 35 15 850 5 100 22 3350 6
CASTLEGAR SPOK 67 13 1000 15 100 19 3500 13
CRANBROOK SPOK 40 11 1100 20 100 17 3950 12
REVELSTOKE KEL 30 14 850 5 100 18 3450 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 FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON W 11 NW 26 NW 37
CRANBROOK NW 11 NW 35
INVERSION HT BREAKTHRU TEMP
KELOWNA NONE NONE
SPOKANE 1200 m 15 C
TODAY'S VENTING: GOOD
VENTING FOR SATURDAY: GOOD
VENTING OUTLOOK SUNDAY THRU TUESDAY: 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. 74 14 3950 3 74 21 3950 3
PR. GEORGE P.G. 20 14 1150 3 72 20 3700 3
SMITHERS P.G. 20 14 950 3 72 18 3500 3
WELLS GRAY P.G. 74 18 4000 3 74 28 4000 3
FT NLSN F.N. 100 14 1400 26 100 20 2550 21
FT STJOHN F.N. 100 13 1950 22 100 20 3700 18
*SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING
HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS.
FORECAST UPPER WINDS FOR FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE NW 13 NW 11
SMITHERS NW 20 NW 11
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 1100 m 15 C
FT. NELSON NONE NONE
TODAY'S VENTING: GOOD
VENTING FOR SATURDAY: GOOD
VENTING OUTLOOK SUNDAY THRU TUESDAY: GOOD
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 71 15 1350 7 99 20 2450 7
FRASER VLY QUIL 27 13 550 4 82 17 1600 7
SRN VRISL QUIL 19 13 400 3 81 18 1750 7
CNTRL VRISL QUIL 20 13 450 3 87 19 2000 7
NRN VRISL HRDY 56 14 700 9 85 18 1650 8
TERRACE ANT 30 15 800 4 92 22 2650 6
STEWART ANT 35 16 700 4 74 22 1900 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 FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER W 28 W 28 NW 26
PORT HARDY NW 22 NW 24 NW 24
SANDSPIT NW 20 NW 19 NW 19
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 230 m 12 C
PORT HARDY NONE NONE
ANNETTE 1200 m 20 C
TODAY'S VENTING: GOOD
VENTING FOR SATURDAY: GOOD
VENTING OUTLOOK SUNDAY THRU TUESDAY: GOOD
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
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