FOCN45 CWWG 301200
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT THURSDAY APRIL
30 2026.

ALERTS IN EFFECT...NONE AT THIS TIME.

SYNOPTIC OVERVIEW...ALOFT, A TROUGH IS MOVING EASTWARD, FROM THE
ALASKA/YUKON BORDER ACROSS THE EASTERN PACIFIC. AN UPPER RIDGE SITS
OVER WESTERN CANADA WITH A NUMBER OF VORT MAXES RIDING OVERTOP, OVER
THE BEAUFORT SEA. A BROAD UPPER LOW IS OVER NORTHERN ONTARIO WITH A
TROUGH EXTENDING SOUTHWARD INTO THE U.S. MIDWEST. ANOTHER UPPER LOW
SITS OVER THE NORTHERN CANADIAN ARCTIC ARCHIPELAGO, WITH A SHORTWAVE
TROUGH EXTENDING SOUTHWARD THROUGH NORTHERN BAFFIN ISLAND AND INTO
SOUTHAMPTON ISLAND. FINALLY, AN UPPER RIDGE LIES OVER THE WESTERN
ATLANTIC.

AT THE SURFACE, A FLAT PRESSURE PATTERN RESIDES OVER MOST OF WESTERN
CANADA, WITH WEAK RIDGING EXTENDING FROM THE NORTHWESTERN U.S. ACROSS
THE PRAIRIES AND ACROSS THE KIVALLIQ REGION OF NUNAVUT TO A HIGH NEAR
CAMBRIDGE BAY. A 1010 MB LOW SITS OVER CENTRAL YUKON WITH TROUGH
EXTENDING SOUTHEASTWARD INTO NORTHERN SASKATCHEWAN. 1013 MB LOW NEAR
TUK. MULTIPLE WEAK LOW PRESSURE CENTRES LIE ACROSS NORTHERN QUEBEC
WITH TROUGHING EXTENDING FROM THE BELCHER ISLANDS NORTHEASTWARD TO
THE LABRADOR SEA. FINALLY, ANOTHER WEAK 1012 MB LOW PRESSURE SYSTEM
LIES OVER NORTHERN BAFFIN ISLAND.

DISCUSSION...

PRAIRIES...HIGH PRESSURE DOMINATES THE REGION WITH SOME PATCHY
STRATUS LINGERING BENEATH THE RIDGE OVER MANITOBA, WHICH IS LEADING
TO DIFFICULT CLOUD AND TEMPERATURE FORECASTS.

PATCHY FOG IS EXPECTED THE NEXT FEW NIGHTS ACROSS SASKATCHEWAN AND
MANITOBA UNDER THE INFLUENCE OF THE RIDGE OF HIGH PRESSURE.

A LOW PRESSURE SYSTEM APPROACHING THE AREA FROM THE NWT WILL BRING
MORE WEATHER TO THE NORTHEASTERN PRAIRIES BEGINNING ON FRIDAY. A
NORTHEAST-SOUTHWEST ORIENTED COLD FRONT WILL SWING THROUGH NORTHERN
MANITOBA ON FRIDAY EVENING, BRINGING SHOWERS TO THE REGION. THE
SHOWERS MAY SWITCH OVER TO SNOW OVERNIGHT AS TEMPERATURES DROP, OR
POSSBILY FREEZING RAIN PRIOR TO THE SNOW.

MORE SEASONAL TEMPERATURES WILL GRADUALLY SPREAD EASTWARD THROUGH THE
REST OF THE WEEK AND INTO THE WEEKEND.

ARCTIC...THE LOW PRESSURE SYSTEM OVER YUKON WILL PUSH EAST ACROSS THE
CENTRAL NORTHWEST TERRITORIES THROUGH FRIDAY, SPREADING AREAS OF RAIN
OR SNOW AND GUSTY NORTHWESTERLY WINDS ACROSS THE REGION. ULU AND
CAMBRIDGE BAY MAY SEE SOME BLOWING SNOW IN THE SOUTHEASTERLY WINDS
ON THE NORTHERN SIDE OF THIS SYSTEM BUT NOT EXPECTING MUCH NEW SNOW.

AS THIS LOW DEVELOPS AND INTENSIFIES ON FRIDAY AS IT APPROACHES THE
KIVALLIQ, THERE WILL BE SNOW AND BLOWING SNOW CONCERNS FOR SOME
KIVALLIQ COMMUNITIES BEGINNING FRIDAY EVENING, SPECIFICALLY BAKER
LAKE AND ARVIAT. STRONG SOUTHEASTERLY WINDS, COINCIDENT WITH FALLING
SNOW, HEAVY AT TIMES, WILL PRODUCE POSSIBLE BLIZZARD CONDITIONS ON
FRIDAY NIGHT AND SATURDAY. THE POTENTIAL IMPACTS WILL BE MONITORED AS
THE SITUATION NEARS AND BECOMES MORE CLEAR.

LIGHT SNOW CONTINUES IN CLYDE RIVER, AND WILL LAST THERE FOR THE NEXT
24 TO 36 HOURS AS THE INFLUENCE OF THE HIGH ARCTIC LOW DIMINISHES AND
HIGH PRESSURE BUILDS INTO THE REGION FRIDAY NIGHT.

END/COLANGELO/ROMBOUGH