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FPCN39 CWLW 011439
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 1 JUNE 1996 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 60 16 1200 7 100 21 2500 13
KAMLOOPS KEL 45 14 1000 7 100 20 2650 13
OKANAGAN KEL 76 15 1550 8 100 20 2600 13
CASTLEGAR GEG 49 11 900 12 100 16 1750 17
CRANBROOK GEG 55 10 1200 22 100 14 2200 20
REVELSTOKE KEL 9 10 450 1 80 13 1700 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 FRIDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON W 9 W 19 W 24
CRANBROOK W 17 W 28
INVERSION HT BREAKTHRU TEMP
KELOWNA 720 m 12 C
SPOKANE 1170 m 18 C
TODAY'S VENTING: GOOD.
VENTING FOR SUNDAY: FAIR TO GOOD.
VENTING OUTLOOK MONDAY THRU WEDNESDAY: FAIR TO GOOD AS WEAK UPPER
RIDGE OVER AREA AND WEAK UPPER WINDS WILL LIMIT VENTILATION.
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. 68 12 1650 12 100 17 3950 9
PR. GEORGE P.G. 67 13 1400 11 99 17 2500 9
SMITHERS ANN 88 15 2050 9 100 22 3500 10
WELLS GRAY P.G. 80 13 2150 10 100 18 4000 9
FT NLSN F.N. 9 10 400 0 68 21 3400 3
FT STJOHN F.N. 15 11 1000 2 33 14 1850 2
*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 SW 15 SW 16
SMITHERS VR 10 S 15
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 950 m 16 C
FT. NELSON 630 m 18 C
TODAY'S VENTING: GOOD IN THE INTERIOR. FAIR IN THE FORT NELSON AREA
AND POOR IN THE FT. ST. JOHN AREA.
VENTING FOR SUNDAY: FAIR TO GOOD.
VENTING OUTLOOK MONDAY THRU WEDNESDAY: FAIR. COMBINATION OF UPPER
RIDGING AND LIGHT UPPER WINDS WILL LIMIT VENTILATION.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 75 13 1150 9 96 18 1600 10
FRASER VLY QUIL 73 14 1300 8 91 18 1600 9
SRN VRISL QUIL 23 11 250 6 91 18 1550 9
CNTRL VRISL QUIL 23 11 250 6 93 19 1650 9
NRN VRISL HRDY 39 11 600 6 77 15 1450 7
TERRACE ANN 80 16 1450 9 100 22 3200 10
STEWART ANN 76 15 1100 9 100 22 2300 9
*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 SE 20 SW 20 SW 30
PORT HARDY SE 18 S 15 S 25
SANDSPIT SE 25 S 30 S 42
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 180 m 13 C
PORT HARDY 360 m 15 C
ANNETTE 150 m 13 C
TODAY'S VENTING: GOOD. AIRMASS IS UNSTABLE WITH GOOD WINDS.
VENTING FOR SUNDAY: GOOD
VENTING OUTLOOK MONDAY THRU WEDNESDAY: FAIR TO GOOD. EFFECTS OF
UPPER RIDGING AND SLACKENING UPPER WINDS WILL REDUCE VENTILATION.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/JEM
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2 - Smoke Forecast, Interior
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