The current 3 day heatwave will end on Tuesday as a backdoor cold front moves through. This is the second 3 day stretch of 90 degrees or higher we have seen with one in May and now one in June. If the long range is even close to being correct this will be the last 3 day stretch of 90 degree plus weather we will see over the next 2 weeks. At that point it brings us to the last week of June. Yes there could be the odd day or 2 here and there where temperatures could get very warm or even hot. However the upper air pattern setting up across the United States is one where weather systems move along and one wihere the jet stream takes a dip in the Eastern United States putting it south of normal. The result is that it can't get hot for too long.
I'm jumping ahead here to early next week. Before that we have this backdoor cold front that cools it off for the rest of the week and then the approaching trough and cold front bringing an increasing chance for showers Friday through Sunday. When we look at the upper air GFS forecast (and other models are on the same page) we can see a rather strong complex jet stream coming out of Canada sandwiched in between a ridge offshore in the Atlantic and one in the Pacific....READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2017/06/12/long-range-weather-show-no-heatwaves-next-2-weeks/