It’s been one heck of a hot and humid day throughout the Northeast with mid and upper 90s prevailing from DC to Boston. We saw an impressive 96 at both New York’s Central Park and at Logan Airport in Boston. While impressive is that was, the record is 99 in NYC and 102 in Boston, so sure it was hot, especially when considering the normal are now in the mid-70s, but it’s been hotter!

Cool dry Canadian air is now back in play over the Upper Midwest with Minneapolis yesterday and Chicago tomorrow. There are storms blasting the CHI area now and that same front will continue to drop southeast over the next 24 hours. Another hot, humid day in the I-95 again tomorrow but look out mid to late afternoon as the line of showers and storms roll in. By Friday it’s back to the 70s and by Saturday it’s the 60s! What a change but folks, that’s Sept for ya.

Here’s the situation tomorrow.

As for the ECMWF, the model shows the front and it’s showers and storms rumbling along it. Much more refreshing air follows.

By Friday evening, the front is already off the coast and Gabrielle is picked up, clipping Newfoundland and out into the cold waters of the North Atlantic.

[s2If current_user_can(access_s2member_level1)]

So, once the front clears, it’s a fine looking weekend for the Northeast with overnight lows dipping into the 40s and 50s in the Big Cities to 30s over the Interior with pockets of 20s extending from Vermont and New Hampshire down to West Virginia.

As for the Gulf, the system set to push from the western Caribbean into the southwest Gulf still need close watching but right now, it looks to be a significant rainmaker for eastern Mexico and south Texas. The ground is already saturated over much of eastern Mexico for the series of tropical systems which have already come through this season.

Check out the 120 hr total precip through Monday. That’s a lot of rain.

Here was the ECMWF 500mb/850 temps chart for today with the heat pump into the Northeast.

Here’s Saturday

Another front is anticipated to come through the Northeast Monday with more chill to follow.

Here’s Tuesday but notice the ridging and heat pushing back into the heart of the continent.

The chill quickly exits and the ridge builds east again as a significant Pacific system carves a fairly deep trough into the PNW by mid next week. We could go from mid-90s today to 60s Saturday and then back to near 90 by mid to late next week. It’s a rollercoaster pattern.

Check out Friday of next week.

The CFSv2 shows building heights into Canada while heights lower to the south over the US. That’s a pattern that needs to be watched in terms of the tropics.

Week 1-2

Week 3-4

Interestingly, the modelling shows no real cold coming south in the next 3 to 4 weeks, however I am looking at the GFS ensembles for the NAO and AO and both are set to go NEGATIVE towards the end of the month into October and this is when I am anticipate colder times.

Only time will tell.

[/s2If][s2If is_user_logged_in() AND current_user_cannot(access_s2member_level1)]

That’s it, [s2Get constant=”S2MEMBER_CURRENT_USER_DISPLAY_NAME” /]!

To continue reading, you need to have a valid subscription to access premium content exclusive to members. Please join a subscription plan if you would like to continue.[/s2If][s2If !is_user_logged_in()]

Sign in to read the full forecast…

Not yet a member? Join today for unlimited access

Sign up to markvoganweather.com today to get unlimited access to Mark Vogan’s premium articles, video forecasts and expert analysis.
[/s2If]