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May quietly rolls into southern Ontario, but conditions will change

Sunday, May 2nd 2021, 6:00 am - With April in the rearview mirror after closing out with some intense winds, southern Ontario's first weekend in May has so far been calmer, though not without unsettled weather.

May's Saturday debut didn't feel like the best spring could offer, with a mix of sun and cloud and warmer, though not seasonal, daytime highs for most people. Showers will lead into a Sunday temperature rebound, but in all, forecasters see no signs of sustained warmth for the first half of May. A more detailed look, below.

SUNDAY: TEMPERATURES REBOUND, WITH MORE SHOWERS ON THE WAY

The southerly flow will hold over southwestern Ontario Sunday, pushing temperatures into the mid-20s, while under the boundary, the GTA and the central region will daytime highs in the mid-teens.

ONRAIN

The showers accompanying the boundary Sunday morning won't be excessive by any stretch, but may be enough to deter any outdoor plans. Amounts of 5-10 mm are expected in a swath extending from cottage country to the GTA.

This won't be the end of the unsettled weather as a more significant and soggy system will track into the Great Lakes Sunday night.

LOOK AHEAD: MORE RAIN, LACK OF ANY CONSISTENT WARMTH INTO MOTHER'S DAY WEEKEND

Beyond the weekend, the boundary sticks around for the week to come, thanks to some ridging trying to develop along the U.S. East Coast, while a trough digs into northern Ontario. On Monday, a potent system will slowly track along the boundary draped southern Ontario, bringing widespread rain.

Another system is expected to track south of the Great Lakes on Wednesday, with the potential for more rain. Some models track this system too far to the south to impact the region. So sunshine will try to fight back on Wednesday, but likely won't last for long.

ONTempTues

A rather chilly pattern is anticipated for the end of the week and on weekend with a threat for showers, and possibly some graupel. Forecasters will be keeping an eye on the potential for a hard freeze if there are clear and calm conditions during any of the nights.

The chilly pattern is expected to continue through at least May 10, and possibly through the second week of May. While March and early April brought an abundance of May-like temperatures, the first half of May will feel more like early April.

Be sure to check back for updates on the spring temperature rollercoaster across southern Ontario as we head into May.

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