FOCN45 CWWG 241900

SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM

PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT FRIDAY OCTOBER

24 2025.



ALERTS IN EFFECT...BLIZZARD WARNING FOR RESOLUTE.



SYNOPTIC OVERVIEW...ALOFT, UPPER LOW IN THE GULF OF ALASKA WITH

TROUGHING SOUTHWARD OVER THE EASTERN PACIFIC. NUMEROUS SHORTWAVES

TROUGHS OVER THE NWT WITH AN UPPER LOW OVER THE BEAUFORT SEA. A LARGE

UPPER RIDGE OVER THE PRAIRIES EXTENDS NORTHWARDS ACROSS THE CENTRAL

ARCTIC ARCHIPELAGO. A SMALL CUTOFF UPPER LOW IS DEPARTING SOUTHERN

MANITOBA AND A LARGE UPPER LOW IN NORTHERN QUEBEC. ANOTHER UPPER LOW

IN BAFFIN BAY.



AT THE SURFACE, TWO LARGE LOW COMPLEXES OVER WESTERN AND EASTERN

CANADA WITH A RIDGE EXTENDING IN BETWEEN THEM FROM THE US MID WEST

NORTHWARD THROUGH WESTERN HUDSON BAY AND ALL THE WAY TO ALERT.

LOW CENTRES IN THE BEAUFORT, NORTHERN NWT, THE YUKON AND NORTHERN

QUEBEC. LEE LOW DEVELOPING OVER THE BC PEACE WITH TROUGH ALONG THE

ALBERTA FOOTHILLS.



DISCUSSION...



PRAIRIES/NWT...THE RIDGE OVER THE EASTERN PRAIRIES IS RESULTING IN

ABOVE SEASONAL TEMPERATURES AND GENERALLY BENIGN WEATHER OVER THE

AOR. THERE WAS SOME FOG UNDER THE RIDGE IN THE EASTERN PRAIRIES THIS

MORNING, AND WITH A SLIGHT SHIFT EASTWARD MORE IS EXPECTED AROUND

WESTMAN TONIGHT WITH POCKETS ELSEWHERE IN MANITOBA.



THE LOW OVER NE BC WILL MOVE TO THE NE AND SIT OVER LAKE ATHABASCA BY

NOON TOMORROW. THIS LOW WILL BRING SHOWERS TO NORTHERN ALBERTA/NW SK/

SOUTHERN NWT WITH AMOUNTS OF 5-15 MM NEAR THE LOW. THE MOUNTAIN

PARKS IN AB MAY SEE A FEW CM OF SNOW AT HIGHER ELEVATIONS TONIGHT.



NU...THE LOW OVER THE NORTHERN NWT WILL CONTINUE TO PUSH NORTHWARD

TODAY. WITH THE GRADIENT TIGHTENING, EAST WINDS WILL STRENGTHEN AT

RESOLUTE WITH GUSTS UP TO 80 KM/H EXPECTED BEGINNING THIS EVENING.

SNOWFALL WILL ALSO BEGIN THERE LATE THIS EVENING, WITH UPWARDS OF

5-10 CM EXPECTED BY SATURDAY AFTERNOON. THE COMBINATION OF VERY

STRONG WINDS AND MODERATE SNOWFALL WILL LIKELY BE ENOUGH TO REDUCE

VISIBILITY TO 1/2 SM OR LESS. WITH THIS SYSTEM HAVING PRODUCED

BLIZZARD CONDITIONS AT ULUKHAKTOK YESTERDAY, AND RESOLUTE HAVING ITS

FIRST BLIZZARD OF THE SEASON EARLIER THIS WEEK, A BLIZZARD WARNING

WAS ISSUED FOR THAT COMMUNITY BEGINNING TONIGHT. CONDITIONS WILL

IMPROVE SATURDAY EVENING AS WINDS WEAKEN.



LOW OVER QUEBEC IS MOVING TO THE EAST OF BAFFIN ISLAND. ACCUMULATING

SNOW IS EXPECTED AT SOME POINT TONIGHT AT QIKIQTARJUAQ AND CONTINUE

INTO FRIDAY NIGHT; THIS IS DRIVEN ENTIRELY BY LOCAL UPSLOPE FLOW AND

A DESTABILIZING STRATUS LAYER 5K TO 10K FEET THICK. ACTUAL AMOUNTS

WILL BE VARIABLE AND UNCERTAIN, BUT NOT LOOKING SIGNIFICANT GIVEN THE

WEAK FLOW AND REASONABLY SHALLOW MOISTURE. AFTER THIS, THE APPROACH

OF THE NWT LOW WILL SEE WINDS GUSTING UP TO 80 KM/H ALONG THE

KIVALLIQ SNOW BY LATE SATURDAY, AND STEADY ACCUMULATING SNOW MOVING

INTO NORTH BAFFIN FOR THE START OF THE WEEK.



END/KNIGHT/ROMBOUGH