Tuesday, 20 January 2015

Will skies be clear over southern Ontario Tuesday evening?


Skies are likely to become mostly clear except for some mid-level cloudiness near Lake Ontario and Lake Erie during the early evening as mid-level cloudiness, associated with a weak weather disturbance over the southern Great Lakes region during Tuesday, diminishes and moves southeastward from southern Ontario during the afternoon and early evening. Otherwise, mostly clear skies are likely.


Monday, 19 January 2015

Will skies be clear Monday night over southern Ontario?


It looks like some clearing skies will develop over most regions, except for low-level moisture flowing southward over Lake Huron and Georgian Bay during the evening, causing some low-level cloudiness over some regions of southern Ontario, and mid-level cloudiness moving eastward across southwestern Ontario later in the evening.



Friday, 16 January 2015

Will skies be clear Friday night over southern Ontario?

It looks like skies will be mostly clear over southern Ontario before midnight, and then increasing cloudiness is forecast to move eastward across southern Ontario ahead of a warm front. A noticeable exception to the evening clear skies may be some low-level cloudiness over the regions south of Lake Huron and Georgian Bay due to lake-effect cloud development.


Wednesday, 14 January 2015

Will skies be clear over southern Ontario Wednesday evening?

It looks like skies may be mostly clear for several hours after sunset over regions near Toronto, but increasing cloudiness may cause mostly cloudy skies after sunset over western regions of southern Ontario. Also, increasing high-level moisture may appear as high clouds over all of southern Ontario after (as well as before) sunset.



Tuesday, 13 January 2015

Will skies be clear over southern Ontario Tuesday night?


It looks like very clear skies are likely, with a strong high pressure ridge overhead. Some locations near western Lake Ontario might be prone to low-level stratus clouds drifting toward the west, under northeasterly winds (at noon Tuesday) becoming southwesterly Tuesday evening. The stratus clouds are visible on visible satellite imagery (such as the example below) and may move northward over the regions around the western end of Lake Ontario (generally the GTHA regions) as low-level winds become southeasterly during Tuesday evening.



Monday, 12 January 2015

Will skies be clear over southern Ontario Monday night?

It looks like skies will be clear by about sunset and remain clear overnight, except for some low-level cloudiness that may develop periodically during the evening, especially in regions south of Lake Huron and Georgian Bay.



Friday, 2 January 2015

Will skies be clear Friday night over southern Ontario?

It looks like a high pressure ridge over Ontario will cause subsidence and mostly clear skies  Friday evening, except for jetstream-level moisture that may appear as high cloud over southern Ontario, due to the presence of a very strong jetstream over southern Ontario Friday evening. After midnight, increasing moisture will be moving northeastward over southern Ontario and gradually thickening cloud cover is likely to cause overcast skies by sunrise.