Ottawa residents are getting one final taste of spring-like sunshine before a messy storm system rolls in and makes Tuesday a day to dread your commute.
Monday is shaping up to be a genuinely pleasant late-March day in the capital — mild temperatures, sunny skies, and the kind of weather that almost convinces you winter is done for good. Enjoy it while it lasts, because the forecast takes a sharp turn overnight.
What's Coming Tuesday
A significant low-pressure system is tracking toward the Ottawa Valley, and it's bringing the works: forecasters are calling for 20 to 40 millimetres of rain, along with the unwelcome addition of freezing rain. That combination is a classic late-March gut punch for the region — just warm enough to rain, just cold enough at the surface to ice everything over.
Freezing rain events are among the more dangerous weather hazards Ottawa faces in the shoulder season. Even a thin glaze of ice can make sidewalks treacherous and roads slick, and 20–40 mm of precipitation is a substantial amount that could lead to localized ponding and slippery conditions well into Tuesday evening.
What You Should Do
If you can shuffle your schedule around, Tuesday morning rush hour is the time most worth avoiding. Freezing rain typically hits hardest in the early hours before temperatures rise enough to tip precipitation over to plain rain. Give yourself extra time if you're driving, and check Environment Canada's weather alerts before heading out — conditions can shift quickly with these transitional systems.
For cyclists and pedestrians, extra caution on bridges and overpasses is a must. These surfaces freeze first and thaw last, and even a brief freezing rain episode can leave them dangerously icy long after roads have cleared.
If you haven't already swapped your winter tires for all-seasons, this week's forecast is a solid reminder that Ottawa's winter driving season isn't quite behind us yet.
The Bigger Picture
This kind of late-March weather swing — warm and sunny one day, rain and ice the next — is pretty typical for Ottawa. The city sits in a transition zone where Arctic air masses and warmer Gulf moisture frequently clash in spring, producing exactly these kinds of volatile conditions. It's one of the less glamorous features of living in the Ottawa Valley.
The good news: once Tuesday's system clears, temperatures should rebound and the outlook for the rest of the week looks more seasonable. Think of Tuesday as one last weather obstacle before spring properly takes hold.
In the meantime, charge your phone, keep an ice scraper in the car, and maybe plan to work from home if you have the option.
Source: CTV News Ottawa via Google News Ottawa RSS feed.
