761  
FOCN45 CWWG 211900  
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM  
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT SUNDAY OCTOBER  
21 2018.  
 
ALERTS IN EFFECT... NONE IN EFFECT AT THIS TIME.  
 
SYNOPTIC OVERVIEW... SHORTWAVE TROUGH OVER THE NORTHEASTERN PRAIRIES  
AND KIVALLIQ EARLY THIS AFTERNOON WITH SEVERAL IDENTIFIABLE VORTICES  
SEEN ON WATER VAPOUR IMAGERY... ALL SLIDING SOUTHEASTWARD DOWN THE  
EAST SIDE OF THE UPPER RIDGE CURRENTLY BUILDING OVER BC AND INTO  
ALBERTA. UPPER LOW OVER BAFFIN BAY WITH LONG WAVE TROUGH SOUTHWARD  
THROUGH QUEBEC AND NEW ENGLAND.  
 
AT THE SURFACE THERE IS A 999 MB LOW NEAR ENNADAI, WEAKENING AND  
TRACKING TOWARDS NORTHEASTERN MANITOBA. HIGH PRESSURE COVERS BC,  
WESTERN ALBERTA, AND SOUTHWESTERN SASKATCHEWAN. 1026 MB HIGH CENTER  
IN NORTHERN BC. RIDGE THROUGH GREAT SLAVE AND GREAT BEAR LAKES UP TO  
A 1022 MB HIGH OVER BANKS ISLAND.  
 
DISCUSSION...  
 
EASTERN PRAIRIES...SUNSHINE AND ABOVE NORMAL TEMPERATURES FOR MOST  
AREAS EXCEPT FOR NORTHERN MANITOBA WHERE THERE WILL BE LIGHT MIXED  
PRECIPITATION TODAY AND TONIGHT.  
 
WESTERN PRAIRIES...ASIDE FROM SOME SHOWERS AND FLURRIES IN NORTHERN  
SASKATCHEWAN, MAINLY SUNNY WEATHER IS THE ORDER OF THE DAY.  
 
EASTERN ARCTIC... LOW NEAR ENNADAI TRACKING SLOWLY SOUTHEASTWARD  
OVER THE NEXT DAY OR SO. LIKELY AROUND 5 TO 10 CM OF SNOW SHOULD  
FALL OVER MOST OF KIVALLIQ BUT IN A 24 HOUR PERIOD AS A NORTHWARD  
PROTRUDING TROUGH FROM THE LOW AFFECTS THEM.  
 
WESTERN/HIGH ARCTIC...LOTS OF STRATUS AND FOG ALONG THE COASTLINES  
AND OVER OPEN WATER. OTWZ PTCHY BKN CLOUD WITH A FEW EMBDD FLURRIES.  
 
END/MELSNESS/MACKAY  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab CANADA Page Main Text Page