FOCN45 CWWG 041200

SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM

PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT MONDAY MAY

4 2026.



ALERTS IN EFFECT...AIR QUALITY WARNING FOR JASPER NATIONAL PARK.



SYNOPTIC OVERVIEW...HIGHLY AMPLIFIED FLOW CONTINUES ACROSS CANADA

THIS MORNING. A SHARP UPPER RIDGE STRETCHES FROM THE DEEP PACIFIC

NORTHWARD TOWARDS NORTHERN BC THEN INTO THE YUKON. EAST OF THIS, A

CUTOFF LOW LIES OFF THE COAST OF CALIFORNIA AND AN UPPER LOW COMPLEX

LIES OVER HUDSON BAY WITH TROUGHING SOUTHWESTWARD THROUGH MANITOBA.

ANOTHER TROUGH EXTENDS FROM THIS UPPER LOW COMPLEX EASTWARD TOWARDS

THE MARITIMES. FINALLY, AN UPPER RIDGE LIES ACROSS BAFFIN ISLAND.



AT THE SURFACE, A 1036 MB HIGH SITS OVER BAFFIN BAY WITH A RIDGE

ALONG THE SPINE OF BAFFIN ISLAND. A 998 MB LOW LIES OVER SOUTHERN

HUDSON BAY. AN INTENSE 983 MB LOW IS OVER NORTHWESTERN ONTARIO.

ANOTHER INTENSE LOW LIES OVER THE MARITIMES. RIDGING STRETCHES FROM

BAFFIN BAY SOUTHWARD THROUGH NUNAVUT TOWARDS NORTHERN ALBERTA.



DISCUSSION...



WESTERN PRAIRIES...NORTHWEST FLOW WILL PERSIST OVER THE REGION TODAY,

WITH A FEW SCATTERED SHOWERS/FLURRIES POSSIBLE OVER THE FOOTHILLS/

ROCKIES AND EASTERN ALBERTA/NORTHERN SASKATCHEWAN.



SMOKE FROM A PRESCRIBED BURN NORTH OF JASPER BROUGHT SOME POOR AIR

QUALITY TO THE TOWNSITE YESTERDAY EVENING. WITH LITTLE CHANGE IN THE

PATTERN OVER THE NEXT COUPLE OF DAYS, IT IS EXPECTED THAT SMOKE WILL

LINGER IN THE REGION UNTIL THE BURN RUNS ITS COURSE.



EASTERN PRAIRIES...UNSETTLED CONDITIONS IN THE WAKE OF THE LOW

PRESSURE SYSTEM NOW OVER NORTHWESTERN ONTARIO. COOL, GUSTY NORTHERLY

WINDS WILL BRING BELOW SEASONAL TEMPERATURES TO THE EASTERN PRAIRIES

FOR THE FIRST HALF OF THE WEEK. WILL SEE A FEW FLURRIES IN SPOTS AS

TEMPERATURES DIP BELOW THE FREEZING MARK THIS MORNING - AND EVEN

THROUGH THE DAY ON MONDAY AS THE VERY COLD AIR ALOFT KEEPS CONDITIONS

CLOUDIER AND UNSTABLE WITH THE STRONG MAY SUN. WARMER CONDITIONS WILL

MOVE INTO THE REGION ONCE AGAIN BY NEXT WEEKEND.



NT...A SLOW MOVING TROUGH FROM BANKS ISLAND TO GREAT SLAVE LAKE WILL

BRING SOME LIGHT SNOW TO PARTS OF THE NT TODAY.



ON TUESDAY, A LOW MOVING INTO THE TERRITORY FROM THE YUKON WILL BRING

SOME MODERATE WINDS TO THE CENTRAL MACKENZIE VALLEY AND COMMUNITIES

NEAR GREAT BEAR LAKE.



NU...BLIZZARD CONDITIONS CONTINUE TO WIND DOWN ACROSS THE KIVALLIQ AS

THE LOW OVER SOUTHERN HUDSON BAY WEAKENS.



ANOTHER LOW WILL TAKE A SIMILAR TRACK ON TUESDAY GIVING ANOTHER ROUND

OF SNOW, STRONG WINDS, AND BLOWING SNOW TO SOUTHERN BAFFIN AND THEN

HUDSON BAY COMMUNITIES.



END/STAMMERS/GRIFFITH