Finally! As we edge towards the end of September (can you believe it?), we are finally seeing a good chance of rain headed towards the Washington D.C. area. It certainly looks like rain as those clouds hang thick for your Wednesday with temperatures only topping out in the upper 60s/lower 70s.
An area of low pressure will continue to travel up the eastern seaboard today and through the day tomorrow bring a good amount of rain with it.
With high pressure sitting to the north and low pressure inching its way up from the south, oceanic moisture will continue to stream in to the Mid Atlantic. This will also create a fairly persistent easterly wind through Wednesday afternoon and into the overnight hours moving northeast at 10-20 mph along I-95 and eastward . The winds will be responsible for some of the coastal water levels to rise around the area, resulting in some minor coastal flooding during high tide.
Most of your Wednesday afternoon will be dry, however, rain will build in from the south to the north after about 5p.m. I am just expecting light rain during the evening hours with the heaviest rain falling during the overnight hours and through the first part of tomorrow morning as that high pressure to the north breaks down and more moisture moves into the region-resulting in heavier rainfall.
A flood watch has been issued for the Greater Washington D.C. Area from 6p.m tonight until 6 a.m. Thursday morning but the National Weather Service may have to extend and expand the flood watch as we get closer to the event.
Considering this is a coastal system, much of the heavy rain will be concentrated along I-95 and eastward but that does not mean that areas to the west are in the clear. We are still expecting some rain west of the D.C. area but the totals may be much less.
- From the Blue Ridge Mountains moving east to the Bay, accumulated rain totals will gradually increase. Washington D.C. area could expect around 1.00” while just to the east could expect 2.00”+.
Good news is that we need the rain! Ronald Reagan National Airport is running about 2.38” below normal for the monthly rain rate in September. Baltimore-Washington Airport is just over 2.00” below normal for average rainfall in September and Dulles International Airport is 2.79” below normal for the month of September as well!
Dry conditions continue to expand through Virginia as well with a lot of our counties measuring “Abnormally Dry” via the U.S. Drought Monitor.
U.S. Drought Monitor shades areas in Yellow that are “abnormally dry” as of September 16th.
If you are headed out to Nats Park tonight for the game against the New York Mets, you might want to bring some rain gear. Again, I am just expecting light showers to spread into the region after 5 p .m. and through gametime. Good news is I am not expecting any thunder or lightning with this system so hopefully the game will go on, despite the showery forecast.
As far as Thursday Night Football goes at Fed Ex as the Redskins take on the Giants, things are looking dry after a wet start on Thursday. If that low slows down, we could have some rain last through the evening hours but as of now, I am keeping things dry for tomorrow evening. Temperatures will drop through the 60s during game time but if you are headed out there early for tailgating, just be prepared with some towels (to dry everything off) and maybe a light jacket that doubles as a rain coat. It will be a cool night at Fed Ex.