086
FOCN45 CWWG 061900
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT TUESDAY
OCTOBER 6 2026.
ALERTS IN EFFECT...FOG ADVISORY FOR FORT SIMPSON NWT.
SYNOPTIC OVERVIEW...ALOFT, A CLOSED LOW IS OVER THE BEAUFORT SEA WITH
TROUGHING OVER ALASKA. THERE IS ZONAL FLOW OVER WESTERN CANADA.
FURTHER NORTH, THERE IS RIDGING OVER YUKON AND NWT. THEN, AN UPPER
TROUGH FROM WESTERN KITIKMEOT EXTENDS SOUTH INTO THE KIVALLIQ AND
NORTHERN MANITOBA. THERE IS AN UPPER RIDGE OVER NORTHWEST ONTARIO AND
HUDSON BAY. FINALLY, AN UPPER TROUGH FROM FOXE BASIN EXTENDS SOUTH
OVER QUEBEC WHERE IT MEETS A CLOSED LOW JUST SOUTH OF LABRADOR.
AT THE SURFACE, A LOW IS OVER THE GULF OF ALASKA. RIDGING IS OVER BC
AND SOUTHERN ALBERTA. A BROAD TROUGH OF LOW PRESSURE EXTENDS FROM
YUKON, THROUGH THE CENTRAL ARCTIC, AND INTO MANITOBA. A FEW WEAK LOW
PRESSURE CENTRES ARE LOCATED WITHIN THE TROUGH OF LOW PRESSURE, MOST
NOTABLE ARE OVER YUKON, WEST OF BAKER LAKE, AND ANOTHER OVER NORTHERN
MANITOBA. A RIDGE OF HIGH PRESSURE STRETCHES ACROSS ONTARIO AND
THROUGH THE EASTERN ARCTIC.
DISCUSSION...
PRAIRIES...THE LOW OVER NORTHERN MANITOBA WILL CONTINUE TO IMPACT THE
REGION WITH SHOWERS TODAY. NO SIGNIFICANT ACCUMULATIONS ARE EXPECTED.
A FEW THUNDERSHOWERS ARE POSSIBLE THIS AFTERNOON AND EVENING ALONG
THE COLD FRONT IN NORTHERN MANITOBA, SASKATCHEWAN, AND ALBERTA.
THE LOW WILL EXIT INTO ONTARIO THIS EVENING WITH THE COLD FRONT
TRAILING BACK ACROSS NORTHERN MANITOBA, SUPPORTING SCATTERED SHOWERS.
THESE SHOWERS WILL SPREAD INTO CENTRAL MANITOBA OVERNIGHT AND INTO
WEDNESDAY.
ARCTIC...THE LOW OVER THE NWT/NUNAVUT BORDER WILL CONTINUE IMPACTING
SOUTHERN KIVALLIQ TODAY. SNOW AT BAKER LAKE AND RANKIN INLET WILL
TRANSITION TO RAIN THIS MORNING AND RAIN WILL CONTINUE IN ARVIAT.
THE LOW WILL BECOME QUASI-STATIONARY AND THE PRECIPITATION WILL
CONTINUE THROUGH TO WEDNESDAY OR THURSDAY. TOTAL RAINFALL AMOUNTS
LOOK TO BE IN THE 10 TO 20 MM RANGE. THE RAIN COULD TRANSITION BACK
TO SNOW OVERNIGHT WEDNESDAY IN SOME LOCATIONS BUT NO SIGNIFICANT
ACCUMULATIONS ARE EXPECTED.
NWT...GENERALLY UNSETTLED WITH WIDESPREAD STRATUS AND FOG OVER THE
SOUTH WHERE A FOG ADVISORY REMAINS IN EFFECT FOR FORT SIMPSON.
FURTHER TO THE NORTH, FLURRIES AND BRIEF FZRA WERE REPORTED AT NORMAN
WELLS BUT MUCH OF THE SNOW ACCUMULATIONS WILL BE CONFINED TO THE
MACKENZIE DELTA. ROUGHLY 2 TO 5 CM PER 12 HRS CAN BE EXPECTED THERE
OVER THE NEXT COUPLE DAYS.
END/BILOUS/MOODIE/VAN LOCHEM
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