169 WWCN16 CWWG 062133 SEVERE WEATHER BULLETIN ISSUED BY ENVIRONMENT CANADA AT 3:33 PM MDT SATURDAY 6 SEPTEMBER 2008. --------------------------------------------------------------------- WATCHES/WARNINGS IN EFFECT FOR NORTHERN ALBERTA... FROST WARNING FOR: =NEW= CITY OF EDMONTON - ST. ALBERT - SHERWOOD PARK =NEW= SPRUCE GROVE - MORINVILLE - MAYERTHORPE - EVANSBURG =NEW= FORT SASKATCHEWAN - VEGREVILLE - REDWATER - SMOKY LAKE =NEW= DRAYTON VALLEY - DEVON - RIMBEY - PIGEON LAKE =NEW= LEDUC - CAMROSE - WETASKIWIN - TOFIELD =NEW= WESTLOCK - BARRHEAD - ATHABASCA =NEW= LLOYDMINSTER - WAINWRIGHT - VERMILION - PROVOST =NEW= BONNYVILLE - ST. PAUL - COLD LAKE - LAC LA BICHE =NEW= SLAVE LAKE =NEW= WABASCA - PEERLESS LAKE - GIFT LAKE - CADOTTE LAKE =NEW= FORT MCMURRAY - FORT MACKAY. PATCHY FROST IS EXPECTED OVER MANY AREAS OF NORTHEASTERN ALBERTA TONIGHT. --------------------------------------------------------------------- ==DISCUSSION== A RIDGE OF HIGH PRESSURE BUILDING INTO ALBERTA FROM BC WILL CLEAR SKIES OVER MOST OF THE NORTHEASTERN HALF OF THE PROVINCE. THE CLEARING SKIES AND A COOL DRY AIRMASS WILL RESULT IN TEMPERATURES AT OR NEAR ZERO WITH FROST EXPECTED IN MANY LOCALITIES. PLEASE REFER TO THE LATEST PUBLIC FORECASTS FOR FURTHER DETAILS. END/LS