Posted: 7/09/2009 09:10:00 AM

At this point, mid 70's and sun would feel warm to us now. However, the normal high for this time of year is in fact in the low 80's. Since June 1, we have hit 80 degrees exactly twice and gone no higher. Finally, low 80's is looking likely Friday and possible Saturday as well.

A departing mid level trough is giving way to surface high pressure sliding into the region today, and then offshore tomorrow. This will help dry out the atmosphere. Today, we still have left over moisture hanging around, but we'll see gradual clearing through the day. Highs today will struggle into the low 70's due to a chilly start and overall mostly cloudy skies. Tomorrow, 850mb temperatures will still be on the cooler side, however we'll see mostly sunny skies helping to heat the surface up into the low 80's. On Saturday, the majority of the day could be dry with mostly sunny skies in the morning, and increasing clouds in the afternoon as a frontal boundary approaches from the west. The timing of the front will bring the main round of showers and thunderstorms overnight Saturday. The timing of clouds will determine the high for the day, so if there is enough of a cap through the afternoon, we could hit the low 80's again. We'll have to watch for severe potential Saturday night, however nocturnal events require stronger daytime instability and a strong cold pool aloft (which will not be present this time). Strong vertical shear may help maintain a line through the region nonetheless.

Sunday, some low level moisture will remain, so morning fog possible, followed by afternoon sun. Cold air advection behind the front will prevent us from reaching 80, but upper 70's is likely. Same will go for Monday, although a weak disturbance may trigger a few showers late Monday evening. Moisture will be lacking, so kept the forecast dry for now.

Tuesday through Wednesday, model guidance becomes less agreeable yielding uncertainty in the forecast. The ECM keeps the forecast dry through this period, while the GFS is advertising a small disturbance running a convective complex through the region. Made few changes to the forecast for now, and will wait for better agreement.

Expecting generally a more zonal flow for the nation next week which is welcomed news for the northeast. This will help run storm systems through quicker and not leave an upper low hanging over the region for days and days. Still, overall pattern of ridge - trough across the CONUS will remain with below normal temperatures likely to continue in the east.





Current analysis
00-hr chart 12-hr forecast
12-hr chart 24-hr forecast
24-hr chart 36-hr forecast
36-hr chart 48-hr forecast
48-hr chart