FPCN39 CWLW 021432
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 Wednesday 2 July 1997 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 69 19 1150 9 100 24 2300 15
KAMLOOPS KEL 82 19 1800 8 100 25 3350 7
OKANAGAN KEL 73 18 1400 9 100 24 2850 7
CASTLEGAR KEL 65 16 1200 11 100 21 3300 8
CRANBROOK KEL 65 16 2250 6 100 22 3950 6
REVELSTOKE KEL 15 16 600 2 100 22 3450 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 WEDNESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PENTICTON VR 5 VR 5 W 9
CRANBROOK VR 5 NW 13
INVERSION HT BREAKTHRU TEMP
KELOWNA 550 m 16 C
SPOKANE MISSING ## C
TODAY'S VENTING: BECOMING GOOD BY AFTERNOON DUE TO AN UNSTABLE
AIRMASS.
VENTING FOR THURSDAY: FAIR TO GOOD.
VENTING OUTLOOK FRIDAY THRU SUNDAY: FAIR TO GOOD FRIDAY AND
SATURDAY. GOOD ON SUNDAY.
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. 90 15 2050 12 100 22 3950 10
PR. GEORGE P.G. 86 16 1700 13 100 22 3700 10
SMITHERS P.G. 25 14 800 6 100 21 3500 9
WELLS GRAY P.G. 99 16 2750 10 100 22 4000 10
FT NLSN F.N. 9 16 400 3 82 22 2600 5
FT STJOHN F.N. 19 15 950 4 100 21 3700 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 WEDNESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
PR. GEORGE VR 5 W 11
SMITHERS VR 5 VR 11
INVERSION HT BREAKTHRU TEMP
PR. GEORGE 800 m 14 C
FT. NELSON 650 m 18 C
TODAY'S VENTING: BECOMING GOOD BY AFTERNOON DUE TO AN UNSTABLE
AIRMASS.
VENTING FOR THURSDAY: GOOD.
VENTING OUTLOOK FRIDAY THRU SUNDAY: FAIR TO GOOD FRIDAY. GOOD ON
THE WEEKEND.
COAST
UPPER ***** MORNING ****** ***** AFTERNOON ****
AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd
(mASL) (kt) (mASL) (kt)
VANCOUVER QUIL 46 17 1050 5 50 21 1350 4
FRASER VLY QUIL 45 17 950 5 54 23 1450 4
SRN VRISL QUIL 29 15 550 4 50 21 1350 4
CNTRL VRISL QUIL 42 17 900 4 50 21 1350 4
NRN VRISL HRDY 29 14 250 9 61 17 1100 6
TERRACE ANT 100 15 1350 16 100 19 2200 16
STEWART ANT 76 15 900 11 100 19 1900 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 WEDNESDAY AFTERNOON (WINDS IN KM/H):
900m 1800m 2700m
VANCOUVER W 9 SW 9 SW 15
PORT HARDY SW 9 S 22 S 26
SANDSPIT S 24 SE 26 SE 26
INVERSION HT BREAKTHRU TEMP
QUILLAYUTE 1800 m 25 C
PORT HARDY 200 m 14 C
ANNETTE NONE ## C
TODAY'S VENTING: FAIR ON THE SOUTH COAST DUE TO A RIDGE OF HIGH
PRESSURE. GOOD FURTHER NORTH MAINLY DUE TO WINDS ASOCIATED WITH
A WEAK FRONTAL SYSTEM.
VENTING FOR THURSDAY: FAIR.
VENTING OUTLOOK FRIDAY THRU SUNDAY: FAIR FRIDAY. BECOMING GOOD
ON THE WEEKEND.
VENTILATION GUIDELINES:
0-33.....POOR
34-54.....FAIR
55-100.....GOOD.
VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET.
END/JDG