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Posted at 05:00 AM ET, 05/19/2011

Forecast: End of the rainy attack nears

Weekend has a hint of summer

* Flash Flood Watch through this evening; Flood Warning for Potomac River near Little Falls (affecting Montgomery & Fairfax counties) and Point of Rocks (Loudoun and Frederick counties); Coastal Flood Warning for D.C., Alexandria and western shore of Chesapeake Bay until 2 p.m. Thursday; Coastal Flood Advisory for remainder of tidal Potomac until 2 a.m. Thurs. (and Coastal Flood Watch thereafter) *

Today's Daily Digit
 
A somewhat subjective rating of the
day's weather, on a scale of 0 to 10.

 
I figure at least 60% of the day should be lovely and for the rest just keep the umbrella handy.
 
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EXPRESS FORECAST

Today: Occasional thundershowers. 73-77. | Tonight: Evening showers. 52-57. | Tomorrow: A few showers still possible. 76-79. | Get Express Forecast by E-mail

FORECAST IN DETAIL

The big lumbering upper level low responsible for this week of ever present shower threats is just about out of here. A storm building out in the Plains will drop kick this slug into the ocean tomorrow. However, the first safely dry day is not until Saturday, but at least it is the weekend! After days on end of perfectly seasonable spring temperatures, good old summer is dying to make an appearance. Look for 80s to set up for an extended stay starting this weekend.


Radar & lightning: Latest regional radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today (Thursday): Humid air shows itself in the form of some patchy fog this morning. Do not be surprised to see the sun making occasional appearances in the morning. Showers and an occasional thundershower (80% chance) are most likely to strafe the area in the afternoon. There could be a few strong wind gusts with the storms but most of the day is nearly calm. Highs should easily reach the mid-to-upper 70s. Confidence: Medium-High

Tonight: A cautious person would keep the umbrella handy for the evening since there is still a 60% chance before midnight. Minimal breezes are a blessing given the showers. Readings gradually slide to the mid-to-upper 50s. Confidence: Medium-High

Keep reading for the forecast through the weekend...


Hail covers a deck after a violent thunderstorm in Leesburg, Va. yesterday evening. (Leanne Littman)

Tomorrow (Friday): The difference today is that those afternoon showers (40% chance) drift down from the north rather than coming up from the south as they have been the past few days...a sure sign that the storm is finally pulling away. A light breeze out of the north is another hint that the storm’s departure is underway. The bulk of the day will have limited sunshine but it is still enough to help highs reach the mid-to-upper 70s. Confidence: Medium

Tomorrow night: Showers should finally be out of the picture with just a 20% chance in the early evening. By the time the sun sets clearing begins. A lovely night for a stroll with readings hanging in the upper 60s to lower 70s. Lows should slip to the mid-50s in the suburbs but hang in the lower 60s downtown. Confidence: Medium-High

A LOOK AHEAD

Saturday is a gardener’s delight! I will be talking about such things later today in fact. Actually this is likely to be a 10 in most anyone’s book. The skies will be mostly clear with just a brief afternoon upturn in those puffy fair weather clouds. Winds are light and highs manage to crack the 80 degree mark in many areas. Highs in the upper 70s to lower 80s give us every reason to expect 70s to hang on through the evening. Lows should only fall to the upper 50s to lower 60s. Confidence: Medium-High

Sunday starts out promising with loads of sun and temperatures charging quickly through the 60s into the 70s during the morning. The problem is the storm in the Midwest that helped kick out our last storm has a band of showers associated with its warm front that is likely to cloud up the afternoon. Highs are unphased and make the lower 80s in nearly all areas. It is highly unlikely that showers occur with this warm front but if they do, 20% chance, it would be around sunset. Overnight lows only fall to the low-to-mid 60s. Confidence: Low-Medium

Monday is a tough call. More showers from the Midwest storm are going to be trying to scale the Appalachians and some are likely to “git er done” by afternoon (40% chance). The more abundant clouds could keep highs a little more contained topping out in the upper 70s to lower 80s. Confidence: Low-Medium

By  |  05:00 AM ET, 05/19/2011

Categories:  Forecasts

 
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