598
FOCN45 CWWG 151200
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT WEDNESDAY
OCTOBER 15 2025.
ALERTS IN EFFECT...NONE.
SYNOPTIC OVERVIEW...ALOFT, UPPER AIR ANALYSIS SHOWING A DEEP UPPER
LOW OVER NORTHERN QUEBEC, WITH UPPER RIDGING OVER THE SOUTHEASTERN
PRAIRIES, AND AN UPPER TROUGH OVER THE WESTERN USA. UPPER LOW OVER
THE HIGH ARCTIC.
LATEST SURFACE ANALYSIS SHOWING A 1001 MB LOW OVER BAFFIN ISLAND.
RIDGE OF HIGH PRESSURE OVER THE SOUTHERN PRAIRIES. 994 MB LOW OVER
THE MACKENZIE VALLEY.
DISCUSSION...
AB...FOG COULD DEVELOP TONIGHT OVER PARTS OF EASTERN ALBERTA.
OTHERWISE NO SIGNIFICANT WEATHER IS EXPECTED.
SK/MB...NIL SIG WX TODAY. SYSTEM APPROACHING FROM THE SOUTH WILL
SPREAD RAIN THROUGH SE SK/SRN MB, WITH UP TO 10-20 MM POSSIBLE.
NT...LOW PRESSURE CURRENTLY SITUATED NEAR TULITA WILL PUSH EASTWARD
ACROSS THE TERRITORY TODAY, BRINGING MIXED PRECIPITATION AND STRONG
WINDS. OVER POPULATED AREAS, PRECIPITATION WILL GENERALLY FALL AS
RAIN WITH 5-10 MM EXPECTED FOR REGIONS NORTH OF GREAT SLAVE LAKE AND
WEST OF GREAT BEAR LAKE. AS COOLER AIR MOVES IN BEHIND THE LOW, RAIN
WILL CHANGE OVER TO A QUICK SHOT OF SNOW, THOUGH NO SIGNIFICANT
ACCUMULATIONS ARE CURRENTLY EXPECTED.
THIS LOW WILL BRING VERY STRONG WINDS TO REGIONS PRIMARILY AROUND
GREAT SLAVE LAKE THIS AFTERNOON AND EVENING. THE STRONGEST WINDS WILL
LIKELY BE ALONG THE SOUTH SHORE OF THE LAKE, WHERE GUSTS UP TO
80 KM/H ARE CURRENTLY FORECAST. A ROGUE GUST TO 90 KM/H IS POSSIBLE,
BUT CONFIDENCE IS LOW. CONDITIONS WILL BE MONITORED AND ALERTS WILL
BE ISSUED AS REQUIRED.
NU...LOW OVER BAFFIN ISLAND WILL BRING SOME MIXED PRECIPITATION,
PARTICULARLY OVER HIGH TERRAIN. NO WARNING AMOUNTS ARE EXPECTED AT
ANY TOWNSITES. LOW OVER THE YUKON WILL MOVE TO IMPACT THE KIVALLIQ ON
THURSDAY, WITH PRECIPITATION MAINLY RAIN OR A RAIN/SNOW MIX.
END/FULTON/GRIFFITH
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