One thing about early summer weather patterns that appear in May; they don't last for more than a few days. Highs reached the lower 90s in many areas today and we will reach 90 to 95 on Thursday. Friday will be the last day of the early heatwave with highs in the 80s before a cold front comes through. The weekend will be much cooler with most highs in the 60s to near 70 at best and it will be dry. Another front approaches on Monday with the chance for showers and thunderstorms. Then after that the pattern goes back to something like what we saw last week which is a blocking pattern developing in the North Atlantic.
We are going to jump to next Monday night and you can see that there is a weak block developing over the North Atlantic near Greenland. It is not as strong as the one last week but it is strong enough to force troughing in the east again. This suggests that the hot weather of today through Friday will be gone for awhile. The bigger question is whether this block and pattern change will last through the Memorial Day holiday weekend...READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2017/05/17/weather-models-show-blocking-returning-next-week/