High pressure dominates the eastern third of the nation this morning and will slowly track east over the next 36 hours.
While this should keep our weather pretty quiet, it is not the only factor in our weather.
In the upper atmosphere, the jet stream is overhead and is fairly strong. This will help keep some clouds around as a disturbance tracks across the Midwest and lower Great Lakes.
Some slightly warmer air- upper 30s instead of low 30s- will move in as this disturbance approaches on Friday. This is not a big change in temperature, but it is an important change.
Low pressure will develop over the Mississippi Valley on Friday and track into the Ohio Valley and Mid-Atlantic on Saturday. Precipitation ahead of this may start as early as late Friday afternoon, but the heaviest and steadiest precipitation will be Saturday morning and early afternoon.
That slight boost in temperature will keep this system primarily rain, with temperatures Friday night only dropping back into the mid 30s with upper 30s to near 40º on Saturday for high temperatures.
Some snow is possible on the backside of the rain Saturday evening and some mixed precipitation is possible over the higher elevations of southwest New York during the day Saturday.
Sunday looks nicer, with highs remaining in the upper 30s with some sun.
