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If you are not a subscriber yet, enter basic when asked to login. 2 FPCN39 CWLW 291430 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 SUNDAY 29 SEPTEMBER 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 18 19 600 2 50 23 1250 5 KAMLOOPS KEL 12 17 600 1 50 23 1250 5 OKANAGAN KEL 12 17 600 1 50 23 1250 5 CASTLEGAR GEG 19 16 750 4 27 22 900 5 CRANBROOK GEG 9 14 950 10 36 21 1250 10 REVELSTOKE KEL 10 14 550 1 13 18 650 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 SUNDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON VR 5 W 15 W 31 CRANBROOK W 15 W 37 INVERSION HT BREAKTHRU TEMP KELOWNA 1450 m 24 C SPOKANE 1450 m 26 C TODAY'S VENTING: Poor to fair as a ridge of high pressure persists over southern BC. VENTING FOR MONDAY: Fair. VENTING OUTLOOK TUESDAY THRU THURSDAY: Fair to good on Tuesday in the wake of a weak cold front, otherwise venting will be poor to 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. 100 13 3950 22 100 17 3950 22 PR. GEORGE P.G. 100 11 2000 18 100 17 3700 20 SMITHERS ANN 89 8 1300 17 100 14 3500 16 WELLS GRAY P.G. 100 12 4000 22 100 18 4000 22 FT NLSN F.N. 19 2 850 2 42 6 1950 2 FT STJOHN F.N. 39 3 1950 3 50 5 2450 3 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE W 20 W 37 SMITHERS W 19 NW 37 INVERSION HT BREAKTHRU TEMP PR. GEORGE 750 m 12 C FT. NELSON A gradual warming with height. TODAY'S VENTING: The airmass has become more unstable at low levels so good venting is expected this afternoon. VENTING FOR MONDAY: Good. VENTING OUTLOOK TUESDAY THRU THURSDAY: Generally good venting is expected to continue. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 9 13 400 0 40 17 600 8 FRASER VLY QUIL 9 13 350 0 40 18 650 8 SRN VRISL QUIL 9 12 150 0 40 18 600 8 CNTRL VRISL QUIL 9 14 500 0 40 18 600 8 NRN VRISL HRDY 67 12 500 17 82 14 650 18 TERRACE ANN 86 9 950 17 100 15 2550 15 STEWART ANN 14 8 150 4 100 15 1900 13 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR SUNDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER W 11 NW 26 NW 37 PORT HARDY N 26 NW 28 W 39 SANDSPIT NW 26 NW 33 NW 50 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 2000 m 32 C PORT HARDY 2400 m 30 C ANNETTE 150 m 8 C TODAY'S VENTING: A cold front stretches across northern Vancouver Island. North of this front venting will be good, whereas south of the front venting will continue poor to fair. VENTING FOR MONDAY: Fair to good. VENTING OUTLOOK TUESDAY THRU THURSDAY: Poor to fair in the south and fair to good in the north. VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/JDG -------------------------------------------------- Special Industry Related Information -------------------------------------------------- 1 - Smoke Forecast, Coast 2 - Smoke Forecast, Interior Q - Return to Previous menu -------------------------------------------------- l Previous usage time: 33:39:54 This session: 00:01:18 --------Total Usage time: 33:41:12 Today's usage time: 00:05:25 This month's usage time: 02:17:11 ----This account expires: 12/31/96