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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 MONDAY 29 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 80 13 1000 20 100 18 3200 16 KAMLOOPS KEL 18 10 700 3 100 19 3350 16 OKANAGAN KEL 27 11 900 3 100 19 3350 16 CASTLEGAR GEG 24 12 800 5 100 18 2500 13 CRANBROOK GEG 100 11 2150 16 100 16 2800 20 REVELSTOKE KEL 24 10 900 3 100 15 3450 16 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON W 11 W 22 W 33 CRANBROOK W 15 W 35 INVERSION HT BREAKTHRU TEMP KELOWNA 1100 m 12 C SPOKANE 800 m 11 C TODAY'S VENTING: An unstable airmass at low levels and moderate southwest winds this afternoon will result in good venting for most of the day. VENTING FOR TUESDAY: Good. VENTING OUTLOOK WEDNESDAY THRU FRIDAY: Good venting through the period. 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. 20 4 1150 10 100 12 3400 15 PR. GEORGE P.G. 20 7 800 10 100 13 3200 15 SMITHERS ANN 100 7 1350 30 100 10 2000 29 WELLS GRAY P.G. 60 4 1800 10 100 10 3500 15 FT NLSN F.N. 9 5 400 4 100 13 2950 8 FT STJOHN F.N. 23 8 900 7 100 13 3700 8 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE W 39 W 44 SMITHERS SW 37 W 44 INVERSION HT BREAKTHRU TEMP PR. GEORGE 1000 m 8 C FT. NELSON 975 m 12 C TODAY'S VENTING: An unstable airmass at low levels and moderate southwest winds this afternoon will result in good venting for most of the day. VENTING FOR TUESDAY: Good. VENTING OUTLOOK WEDNESDAY THRU FRIDAY: Good venting through the period. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 29 10 400 7 78 14 1250 9 FRASER VLY QUIL 26 10 350 6 81 15 1450 8 SRN VRISL QUIL 21 10 250 5 68 14 1100 8 CNTRL VRISL QUIL 14 9 150 4 57 13 900 7 NRN VRISL HRDY 52 9 600 9 100 12 1900 14 TERRACE ANN 70 6 600 20 100 8 850 20 STEWART ANN 9 6 0 5 19 8 100 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 MONDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER SW 19 W 28 W 41 PORT HARDY W 19 W 26 W 37 SANDSPIT W 39 W 43 W 52 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 850 m 13 C PORT HARDY 250 m 8 C ANNETTE none ## C TODAY'S VENTING: Over northern areas venting will be good most of the day due to gusty winds and an unstable airmass. Over the south coast venting will be good only for the late afternoon after daytime heating. VENTING FOR TUESDAY: Fair to good. VENTING OUTLOOK WEDNESDAY THRU FRIDAY: Fair to good Wednesday becoming good Thursday and Friday. 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: 19:39:38 This session: 00:01:20 --------Total Usage time: 19:40:58 Today's usage time: 00:06:55 This month's usage time: 02:11:56 ----This account expires: 12/31/96 NO CARRIER