Please wait...checking for disk quotas [H[2J" The Government of Canada expressly disclaims any warranties or representations with respect to the Environment Canada Electronic Weather Bulletin Board Service, either expressed or implied, including but not limited to, the implied warranties of fitness for the purpose of accessing meteorological, climatological or other data. In no event will the Government of Canada have any obligation arising from contract or tort, or for loss of revenue or profit, or for indirect, special, incidental or consequential damages arising from the use of this information." If you observe SEVERE weather, or have technical problems with one of our services, such as WeatherBoard, WeatherFax, etc., please call 664-9028. *** NEWS: Samples of GOES-90 satellite images and RAVOS remote photographs are now downloadable from Basic User Menu/New Sample Menu. Welcome to Environment Canada's WeatherBoard Service... If you are not a subscriber yet, enter basic when asked to login. 2 FPCN39 CWLW 011434 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 THURSDAY 1 MAY 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 87 12 1550 10 100 16 2750 10 KAMLOOPS KEL 77 10 1350 10 100 16 3350 11 OKANAGAN KEL 77 10 1350 10 100 15 2950 11 CASTLEGAR SPOK 100 10 1800 17 100 15 3500 16 CRANBROOK SPOK 100 8 2500 17 100 14 3950 15 REVELSTOKE KEL 72 9 1350 10 100 15 3450 11 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON W 9 W 17 NW 19 CRANBROOK VR 5 W 9 INVERSION HT BREAKTHRU TEMP KELOWNA 700 m 8 C SPOKANE 1400 m 8 C TODAY'S VENTING: An unstable airmass remains over the province today. As a result venting will be good over all areas. VENTING FOR FRIDAY: Good. VENTING OUTLOOK SATURDAY THRU MONDAY: The airmass will remain unstable through Monday as an upper low approaches the coast. 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. 46 7 1400 10 100 12 3950 7 PR. GEORGE P.G. 23 7 950 6 100 13 3700 7 SMITHERS P.G. 10 5 600 1 100 13 3500 6 WELLS GRAY P.G. 40 5 1550 8 100 14 4000 7 FT NLSN F.N. 17 5 500 8 53 8 1250 6 FT STJOHN F.N. 53 6 1650 6 100 11 3700 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 THURSDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE NW 15 N 9 SMITHERS W 9 SW 9 INVERSION HT BREAKTHRU TEMP PR. GEORGE 1300 m 12 C FT. NELSON 600 m 8 C TODAY'S VENTING: An unstable airmass remains over most of the BC interior, so with daytime heating venting will become good for this afternoon. The exception will be in the far northeast where the mixing height won't be as high. VENTING FOR FRIDAY: Good. VENTING OUTLOOK SATURDAY THRU MONDAY: The airmass will remain unstable through Monday as an upper low approaches the coast. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 100 10 1650 16 100 13 2500 16 FRASER VLY QUIL 95 9 1100 15 100 14 2700 16 SRN VRISL QUIL 64 9 750 10 100 12 2050 14 CNTRL VRISL QUIL 9 7 100 0 100 13 2350 15 NRN VRISL HRDY 62 8 700 10 100 12 2200 12 TERRACE ANT 48 7 950 7 86 13 2600 5 STEWART ANT 46 9 900 5 76 13 2050 5 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR THURSDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER W 17 W 15 VR 5 PORT HARDY NW 17 VR 5 VR 5 SANDSPIT W 13 VR 5 VR 5 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 150 m 7 C PORT HARDY 150 m 7 C ANNETTE 100 m 7 C TODAY'S VENTING: An unstable airmass remains over the province today. As a result venting will be good over all areas. VENTING FOR FRIDAY: Fair to good. VENTING OUTLOOK SATURDAY THRU MONDAY: The airmass will be unstable through Monday as an upper low approaches the coast. 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 --------------------------------------------------