Foggy & Warm Days Ahead for Southern Ontario: Widespread Dense Fog Starting This Weekend and Double-Digit Temperatures on Monday
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March has ushered in a tranquil period for Southern Ontario following the whirlwind of weather experienced in the final stretch of February. With temperatures climbing above the seasonal norm for the weekend, an area of fog has begun to descend across the region, foreshadowing a week that will start with several mornings blanketed in dense mist. While light drizzle is expected to accompany the fog, significant rainfall is not anticipated.
We are also watching the potential for what could be some of the warmest air we’ve seen this year so far across Southern Ontario starting Monday.
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As of Saturday afternoon, fog has started to materialize in parts of Southern Ontario. Current models predict that this fog will thicken as the day progresses into the night, with much of Eastern, Central, and Southwestern Ontario, along with the Golden Horseshoe, expected to face near-zero visibility conditions overnight and into Sunday morning.
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Sunday will see the fog dissipate to some degree after sunrise, but it may persist in certain areas throughout the day. This break will be short-lived, as a more extensive blanket of fog is forecasted to envelop almost all of Southern Ontario by Sunday evening, remaining into Monday morning.
This persistent fog could lead to school bus delays or cancellations on Monday, so it would be wise to prepare for potential disruptions. The fog is slated to make a return on Monday night, continuing into Tuesday, which could once again impact school transportation for a second consecutive day.
The weather story of this week continues with a resurgence of mild conditions, particularly pronounced on Monday through Wednesday. A swath of the area will experience highs in the double digits, with the Windsor region potentially flirting with the 20°C mark on Monday for the second time this year!
As Tuesday gives way to Wednesday, steady rainfall is expected to sweep across Southern Ontario, predominantly in the latter half of Tuesday, persisting into Wednesday. Rainfall totals are forecasted to be modest, in the range of 5-10mm by Wednesday's end. Moreover, the potential for a thunderstorm on Tuesday cannot be discounted, although the severity is not anticipated to come anywhere close to what we saw last week.
