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 041432 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 SATURDAY 4 MAY 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 65 11 1400 6 100 16 3200 6 KAMLOOPS KEL 46 9 1200 5 100 16 3350 6 OKANAGAN KEL 71 10 1600 7 93 14 2600 7 CASTLEGAR GEG 54 9 1750 8 100 13 3500 13 CRANBROOK GEG 55 5 2000 5 100 7 2950 16 REVELSTOKE KEL 10 6 500 1 83 11 2050 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 SATURDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PENTICTON VR 5 NW 11 NW 15 CRANBROOK VR 5 W 11 INVERSION HT BREAKTHRU TEMP KELOWNA SFC SPOKANE 945 m 4 C TODAY'S VENTING: MORNING INVERSION IN THE EAST GIVING POOR VENTING THEN GOOD VENTING ONCE IT BREAKS DOWN. BREAKDOWN TIME LIKELY CLOSE TO 11 A.M. GOOD ALL DAY IN THE WEST. VENTING FOR SUNDAY: GOOD VENTING OUTLOOK MONDAY THRU WEDNESDAY: PATTERN SHOWS UPPER TROUGH OVER AREA WITH VERY COLD AIR FOR THIS TIME OF YEAR FEEDING FROM THE NORTH. STRONG SURFACE INVERSIONS BUILD WHERE SKIES CLEAR GIVING POOR VENTING WHILE OVERCAST LOCATIONS MAINTAINING FAIR TO GOOD VENTING FOR THE MORNINGS. INSTABILITY IN TROGH GIVES GOOD VENTING EACH AFTERNOON. 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. 40 6 1400 8 100 12 3950 11 PR. GEORGE P.G. 23 5 800 11 100 13 3700 11 SMITHERS ANN 9 6 500 10 100 14 3500 11 WELLS GRAY P.G. 75 6 2000 10 100 14 4000 11 FT NLSN F.N. 70 2 1350 10 100 7 1750 18 FT STJOHN F.N. 70 4 1800 9 100 7 2750 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 SATURDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m PR. GEORGE W 26 W 35 SMITHERS W 24 NW 35 INVERSION HT BREAKTHRU TEMP PR. GEORGE 1060 m 8 C FT. NELSON SFC TODAY'S VENTING: IN THE CENTRAL INTERIOR POOR VENTING IN MORNING DUE TO NEAR ISOTHERMAL LAPSE RATE AND LIGHT WINDS. EXCEPTION IS WELLS GRAY AREA BECAUSE OF IT ELEVATION. GOOD VENTING IN THE AFTERNOON BUT ONLY NEAR PEAK HEATING TIME. IN THE NORTHEAST VENTING HAS IMPROVED AS INVERSION IS NOW ELEVATED WITH A BASE NEAR 1250 METRES AND TOP NEAR 1520 METRES. WITH ARCTIC FRONT FOREVAST TO CROSS AREA WINDS WILL PICK UP. VENTING FOR SUNDAY: GOOD VENTING OUTLOOK MONDAY THRU WEDNESDAY: PATTERN SHOWS UPPER TROUGH OVER SOUTHERN INTERIOR DRAWING A CONTINUED FEED OF COLD AIR FROM NORTH. VENTING POOR IN THE MORNING BECOMING GOOD IN THE LATE AFTERNOON. COAST UPPER ***** MORNING ****** ***** AFTERNOON **** AIR VI Tmp MXG HT Wnd VI Tmp MXG HT Wnd (mASL) (kt) (mASL) (kt) VANCOUVER QUIL 44 9 850 5 77 13 1800 6 FRASER VLY QUIL 19 8 300 5 85 14 2250 6 SRN VRISL QUIL 19 8 250 5 75 13 1750 6 CNTRL VRISL QUIL 34 9 600 5 75 13 1750 6 NRN VRISL HRDY 9 8 200 0 11 11 700 0 TERRACE ANN 10 9 250 9 100 17 3200 11 STEWART ANN 12 10 50 5 100 17 3000 10 *SUBTRACT 20 FROM THE VENTILATION INDEX IN VALLEYS IF THE MIXING HEIGHT IS BELOW THE HEIGHT OF THE LOCAL HILLS. FORECAST UPPER WINDS FOR SATURDAY AFTERNOON (WINDS IN KM/H): 900m 1800m 2700m VANCOUVER W 19 W 20 NW 19 PORT HARDY NW 26 NW 30 NW 28 SANDSPIT NW 30 NW 30 NW 30 INVERSION HT BREAKTHRU TEMP QUILLAYUTE 250 m 8 C PORT HARDY 610 m 10 C ANNETTE 180 m 12 C TODAY'S VENTING: POOR IN THE MORNING DUE TO SURFACE INVERSIONS BUT GOOD IN THE AFTERNOON AS THE INVERSION BREAKS. VENTING FOR SUNDAY: GOOD VENTING OUTLOOK MONDAY THRU WEDNESDAY: UPPER TROUGH OVER THE SOUTHERN PART OF THE PROVINCE WILL CONTINUE TO DRAW COLD AIR FROM THE NORTH. VENTING PATTERN REAMINS THE SAME WITH POOR VENTING IN THE MORNING BECOMING GOOD IN THE AFTERNOON. VENTILATION GUIDELINES: 0-33.....POOR 34-54.....FAIR 55-100.....GOOD. VENTILATION INDICES NORMALLY DROP TO POOR AFTER SUNSET. END/PJS -------------------------------------------------- Special Industry Related Information -------------------------------------------------- 1 - Smoke Forecast, Coast 2 - Smoke Forecast, Interior Q - Return to Previous menu -------------------------------------------------- l Previous usage time: 20:11:20 This session: 00:01:23 --------Total Usage time: 20:12:43 Today's usage time: 00:05:38 This month's usage time: 00:26:18 ----This account expires: 12/31/96 NO CARRIER