FOCN45 CWWG 251200
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT FRIDAY OCTOBER
25 2024.

ALERTS IN EFFECT...COASTAL FLOOD WARNING FOR HERSCHEL ISLAND, YUKON.

SYNOPTIC OVERVIEW...ALOFT, RIDGING OVER THE BC COASTLINE GIVES WAY TO
A BROAD CYCLONIC FLOW OVER THE REST OF WESTERN CANADA (INCLUDING THE
ARCTIC). NOTABLE SHORTWAVE RIDES ALONG THE MB/NU BORDER.

AT THE SURFACE, RIDGING ALONG THE BC/AB ROCKIES RIDES RIGHT UP INTO
THE WESTERN ARCTIC. FURTHER EAST, A TROUGH LINE EMANATING FROM THE
HIGH ARCTIC SLIDES SOUTHWARDS, THROUGH WESTERN HUDSON BAY AND INTO
NORTHERN ONTARIO. BETWEEN THESE TWO FEATURES, A GENERAL WESTERLY FLOW
EXISTS. LOW DEVELOPING VC MELVILLE PENINSULA. RIDGE-TROUGH COUPLET
OVER BAFFIN ISLAND AND DAVIS STRAIT, RESPECTIVELY.

DISCUSSION...

EASTERN PRAIRIES...AS THE TROUGH LINE DEPARTS, A FEW FLURRIES OVER
NORTHERN MB AND RAIN SHOWERS IN THE LEE OF THE LAKES THROUGH EASTERN
MANITOBA ARE EXPECTED TODAY. NIL SIG WX FOR THE WEEKEND.

OUTLOOK: FOLLOWING ABOVE SEASONAL TEMPS IN SK ON SUNDAY, NEXT SYSTEM
OF NOTE WILL DEVELOP OVER CENTRAL ALBERTA COME SUNDAY NIGHT.
LOW PROGGED TO MOVE DUE EASTWARDS, SPREADING RAIN INTO SOUTHERN/
CENTRAL SK, WITH SNOW AND FZRA OVER THE NORTHERN PRAIRIES TO START
THE WORK WEEK. SOUTHERN MB WILL BASK IN THE WARMTH MONDAY BEFORE
CONDITIONS COOL TUESDAY.

WESTERN PRAIRIES...FAIRLY BENIGN CONDITIONS WITH GUSTY WINDS IN THE
FOOTHILLS TODAY. FOG MAY DEVELOP TONIGHT ALONG THE RIDGE AXIS IN NE
AB AND NRN SK. NEXT SYSTEM ARRIVES ON SATURDAY WITH SOME SNOW
POTENTIAL IN EXTREME NW AB.

EASTERN ARCTIC...POTENT LITTLE LOW DEVELOPING EARLY THIS MORNING
ALONG THE SOUTHEASTERN SHORES OF MELVILLE PENINSULA. AS LOW SKIMS THE
EASTERN FLANK OF THE LAND MASS, UPWARDS OF 5 TO 10 CM IS EXPECTED IN
SANIRAJAK, WITH 5 CM FORECAST TO FALL FOR IGLOOLIK. LOW WILL LEAVE AS
QUICKLY AS IT ARRIVES, DISSIPATING OVER NORTHERN BAFFIN ISLAND
SATURDAY MORNING.

WESTERN ARCTIC...BLUSTERY CONDITIONS CONTINUE ALONG THE COAST WITH
ONSHORE FLOW. WITH 850 MB TEMPS IN THE -12 TO -15 RANGE, SNOW SHOWERS
AND SEA ENHANCED SNOW ARE LIKELY. AMOUNTS WILL BE MINIMAL WITH MAYBE
2-5 CM PER 12 HOURS. HIGH WATER LEVELS ARE LIKELY TO PERSIST ALONG
PORTIONS OF THE NWT/YUKON COAST AS NORTHWEST FLOW CONTINUES INTO
EARLY NEXT WEEK. A COASTAL FLOOD WARNING REMAINS IN EFFECT FOR
HERSCHEL ISLAND, YUKON.

END/DYKES/VAN LOCHEM