We are in the middle of the 2nd true heat wave of the summer season , the heat is expected to peak through Wednesday with highs in the upper 80s to mid 90s and high humidity with lows failing to fall below 70. The heat will begin to slip away by Friday and a much cooler weather pattern is expected to begin taking hold this weekend and lock in next week
For this week we will have the threat for isolated to scattered storms starting tonight and lasting through Wednesday morning as a series of weakening disturbances come through the area, but with weakening disturbances cole weakening thunderstorms so the threat for rain will remain isolated , any storms that do make it could be strong with heavy rain , strong wind, small hail etc but again only isolated activity is expected especially the farther east one goes towards the coast, more widespread activity is expected over northwest sections where these disturbances will still have some kick to them.
The most impact these disturbances will have is a slow break down of a ridge over the Southeast and Plains , these disturbances will begin to squash the rushing and thus the heat to the south and west of the area starting Thursday and Friday
This is the current pattern with a southwest flow from the Plains into the Mid Atlantic, this ridge will build just enough to keep most of the storm activity to our northwest and into some western sections of the area
By the weekend though we start seeing fundamental changes in the Pacific which leads to cold front boundaries pushing this ridge southward, and a pretty typical weak El Niño pattern looks to lock in as a trough sets up near the Aleutians, riding sets up over the western US and troughs becoming more dominant in the eastern half of the nation, specifically the Great Lakes and Northeast
A series of cold fronts will slowly knock the pattern down then the real kicker cold front is expected between Sunday and Tuesday which will bring a deep trough into the area, and is expected to lock in
This is a very impressive trough and impressively amped up pattern for this time of year, and could bring a prolonged period of below avg temperatures and periods of unsettled weather , along with periods of cool crisp dry Canadian air being on the east side of the trough with a bit of a battle zone over the area so after this heat wave there may not be another for a little while