BLOG: Getting Hot, Hot, Hot

Mostly sunny today, albeit bit hotter and more humid with an upper-level ridge expanding further eastward and southwesterly winds increasing. These winds increase as a result of an approaching low pressure system moving eastward from central Canada. A cold front will stretch southwestward from this low and will approach the northern and western suburbs tomorrow evening and reaching the city overnight. As dewpoints rise into the 70s and temperatures peak in the low 90s, instability will be high and showers and thunderstorms will fire up ahead of the front and along a pre-frontal trough just to our west late in the day. Model guidance suggests that enough instability should exist for a few of these storms to become quite strong for the afternoon and evening, so this is something we'll continue to keep a close eye on.
 
Look for the showers and thunderstorms to continue overnight as the cold front continues to move southeastward. Most model guidance suggests that northern and western suburbs will be cleared of precip by noon on Tuesday while southern areas may remain unsettled into the evening. Behind this cold front, another area of high pressure will quickly build southward from Canada, resulting in plenty of sunshine with steadily increasing temperatures and humidity
through the rest of the work week as the high shifts offshore and an upper-level ridge builds in from the west. We could see some of the usual hot spots break 100 by Friday!