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If you are not a subscriber yet, enter basic when asked to login. 2 FPCN39 CWLW 281430 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 28 APRIL 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 32 10 800 4 100 16 2000 15 KAMLOOPS KEL 24 8 750 4 80 16 2000 7 OKANAGAN KEL 20 7 650 4 80 17 2000 7 CASTLEGAR GEG 20 8 900 3 65 17 2500 4 CRANBROOK GEG 9 5 950 4 57 13 2950 3 REVELSTOKE KEL 17 6 650 4 75 14 2000 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 SUNDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON VR 5 SW 19 SW 28 CRANBROOK SW 11 W 20 INVERSION HT BREAKTHRU TEMP KELOWNA 1000 m 9 C SPOKANE 1500 m 11 C TODAY'S VENTING: Becoming good this afternoon with daytime heating. VENTING FOR MONDAY: Good. VENTING OUTLOOK TUESDAY THRU THURSDAY: Generally good as a region will remain under a moderate northwesterly flow. 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. 9 4 950 5 100 12 2400 17 PR. GEORGE P.G. 18 5 950 4 100 13 2400 14 SMITHERS ANN 20 5 600 10 100 11 2400 18 WELLS GRAY P.G. 100 6 2800 17 100 14 3000 17 FT NLSN F.N. 9 6 400 7 100 16 3400 18 FT STJOHN F.N. 100 7 3700 18 100 12 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 SUNDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE S 35 S 50 SMITHERS S 48 S 50 INVERSION HT BREAKTHRU TEMP PR. GEORGE 1200 m 8 C FT. NELSON 640 m 9 C TODAY'S VENTING: A developing southeasterly flow ahead of an approaching frontal system will give good venting today. VENTING FOR MONDAY: Good. VENTING OUTLOOK TUESDAY THRU THURSDAY: Generally good as a region will remain under a moderate northwesterly flow. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 9 9 100 7 60 14 1100 7 FRASER VLY QUIL 20 9 250 6 64 16 1150 7 SRN VRISL QUIL 21 9 250 6 64 14 1150 7 CNTRL VRISL QUIL 21 9 250 6 70 14 1150 10 NRN VRISL HRDY 21 9 300 4 74 12 1150 17 TERRACE ANN 11 6 250 27 100 10 1850 37 STEWART ANN 9 6 0 14 100 10 1200 29 *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 S 19 S 33 SW 43 PORT HARDY S 63 S 76 SW 74 SANDSPIT S 85 S 83 S 80 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 300 m 11 C PORT HARDY 600 m 12 C ANNETTE 100 m 10 C TODAY'S VENTING: Good venting is expected over all areas this afternoon due to mixing induced by a passing frontal system. VENTING FOR MONDAY: Good. VENTING OUTLOOK TUESDAY THRU THURSDAY: Generally fair venting is expected due to a ridge of high pressure along the coast, giving light winds and fairly stable conditions. 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: 19:32:41 This session: 00:01:22 --------Total Usage time: 19:34:03 Today's usage time: 00:05:25 This month's usage time: 02:05:01 ----This account expires: 12/31/96 NO CARRIER