349
FOCN45 CWWG 271200
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT SATURDAY APRIL
27 2024.
ALERTS IN EFFECT...BLIZZARD WARNING FOR MUCH OF THE KIVALLIQ.
SNOWFALL WARNING FOR KINNGAIT.
SYNOPTIC OVERVIEW...UPPER AIR ANALYSIS SHOWED AN UPPER LOW OVER THE
HIGH ARCTIC WITH TROUGHING SOUTH THROUGH TO A LOW OVER SOUTHAMPTON
ISLAND. WEAK RIDGING OVER QUEBEC .
AT THE SURFACE, A 990 MB LOW NEAR KINNGAIT WITH A WARM FRONT EAST
AND COLD FRONT SOUTHWEST. RIDGE OF HIGH PRESSURE OVER QUEBEC
EXTENDING BAFFIN BAY. A SECOND RIDGE OF HIGH PRESSURE ARCS FROM THE
BEAUFORT SEA INTO NWT.
DISCUSSION...
WRN PRAIRIES...WEAK LEE TROUGH WILL FORM OVER CENTRAL ALBERTA TODAY.
DRY SPRING CONDITIONS MAY RESULT IN SOME HIGH BASED TCU CLOUD WITH
THE SLIGHT RISK OF AN ISOLATED THUNDERSTORM.
SOUTHERN MB/SK...SHOWERS LINGER OVER PORTIONS OF SOUTHERN MANITOBA
AND WILL CONTINUE TO PULL OFF TO THE EAST THROUGH THE MORNING TODAY.
BEHIND THE PASSAGE OF THE COLD FRONT, TEMPERATURES WILL COOL TO HIGHS
IN THE UPPER SINGLE DIGITS TO LOW TEENS. HIGH PRESSURE WILL BUILD
BACK INTO THE EASTERN PRAIRIES ON SATURDAY, ALLOWING FOR ANOTHER
GUSTY DAY OVER THE RRV.
A TROUGH DEVELOPING OVER ALBERTA AND SOUTHERN SASKATCHEWAN ON SUNDAY
WILL BRING SHOWERS AND A RISK OF TS TO PORTIONS OF WEST CENTRAL SK.
KIVALLIQ...LOW CURRENTLY OVER SOUTHAMPTON ISLAND MOVES NORTHEASTWARD
AND CONTINUES TO INTENSIFY, BRINGING SNOW AND BLOWING SNOW TO THE
AREA TODAY THROUGH SUNDAY. STORM TOTAL SNOWFALL ACCUMULATIONS OF
10-15 CM ARE EXPECTED FOR SOME OF THE AREA, NOTABLY SOUTHAMPTON
ISLAND AND SOUTHWESTERN BAFFIN ISLAND. BLIZZARD CONDITIONS FOR RANKIN
AND CHESTERFIELD INLETS WILL IMPROVE THIS MORNING.
THE BLIZZARD WARNING FOR CORAL HARBOR REMAINS OUT AND BLIZZARD
CONDTIONS ARE EXPECTED TO REDEVELOP ALONG WITH THE INTENSIFYING
NORTHWESTERLY WINDS THIS MORNING AS THE LOW CONTINUES TO EXIT TOWARDS
FOXE BASIN. WINDS WILL GUST AS HIGH AS 80 KM/H FROM THE NORTHWEST AS
THE PRESSURE GRADIENT LINES UP WITH THE TERRAIN. WITH THE FRESH SNOW
FROM THE PRECIPITATION SHIELD AHEAD OF THIS SYSTEM YESTERDAY, WINDS
THIS STRONG WILL RESULT IN NEAR ZERO VISIBILITY. WINDS WILL DIMINISH
SUNDAY NIGHT AS THE LOW MOVES FARTHER AWAY FROM THE ISLAND AND ALSO
STARTS TO FILL.
THE SAME NORTHWESTERLY WINDS WILL CHANNEL INTO THE NAUJAAT TOWNSITE
THIS MORNING. A FAVOURABLE WIND DIRECTION, WINDS GUSTING IN EXCESS OF
70 KM/H AND FALLING SNOW WILL RESULT IN A BLIZZARD DEVELOPING THIS
MORNING. THE LOCATION OF THE LOW'S PASSAGE WILL ALLOW FOR QUITE A
RESIDENCE TIME OF A STRONG PRESSURE GRADIENT OVER THE SITE, AND THE
BLIZZARD WILL CONTINUE UNTIL OVERNIGHT TONIGHT.
NU...SNOW AND BLOWING SNOW WILL CONTINUE FOR SOUTHERN PORTIONS OF
BAFFIN ISLAND. STRONG WINDS WITH GUSTS TO 80 KM/H WILL AT KINNGAIT
AND IQALUIT WILL ALLOW FOR NEAR BLIZZARD CONDITIONS FOR BOTH OF THESE
SITES. CONDITIONS ARE NOT QUITE RIGHT FOR A DURATION BLIZZARD AT
EITHER SITE, BUT THIS WILL CONTINUE TO BE MONITORED AND MAY BE
UPGRADED.
END/CARLSEN/MARK
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