As hot as we are, and as hot as we’ll be through midweek, some relief (for those who don’t like it) will be coming in stages beginning later this week. We haven’t hit 90 officially since July 16, 2013. But we’ve got a good shot at meeting or exceeding that mark by Tuesday and/or Wednesday this week. We made it to 89 on Monday, tying for the hottest day this year with a day in early May. With a warm ridge of high pressure stacked up in the atmosphere, a little further heating will occur along with a gradual increase in humidity. One positive: the humidity is unlikely to reach such an oppressive level such that the NWS would have to issue a Heat Advisory, let alone a Warning. It will be hot and humid to be sure, but not the stickiest airmass of the season. One negative: Ventilation will be quite poor. Surface winds will remain light into Wednesday, so there will be little in the way of a helpful breeze. Please keep an eye on the elderly, infants and pets the next few days. If you must work outside, drink water BEFORE you feel thirst. Dehydration can set in quickly in the heat. By the time thirst increases you could already be headed for trouble if you’re perspiring heavily. Cool water is the best fluid you can drink in most cases. Alcohol (read Beer) is a diuretic, and you will lose more fluid than you take in.
As for that relief, a weak cold front will cross our region by early Thursday, accompanied by just a few showers & tshowers. Rainfall will be in short supply this week into the weekend, so watering your garden is highly advised. Behind this cold front, temperatures will slip back a few degrees, and humidity will drop off to moderate levels. But high temperatures will still be a little above average (the average is 80) by a few degrees even behind the front. A stronger cold front will be approaching on Monday.
Extended range computer guidance shows good agreement on a cooler than average pattern for the Great Lakes to set up and strengthen for at least several days after August 4th out to about 2 weeks.