* Flash flood watch for most of the D.C. area *

Today’s Daily Digit

A somewhat subjective rating of the days weather, on a scale of 1 to 10.

3
With periods of heavy tropical rain around, it’s time to do some digit slashing.

Express Forecast

Today: Periods of heavy rain, flooding possible. Very breezy. Highs: Mid-70s to low 80s.

Tonight: Heavy rain possible in the evening, diminishing overnight. Lows: Mid-to-upper 60s.

Tomorrow: Increased sun, less rain risk. Slowly decreasing mugginess. Highs: Low-to-mid 80s.

Sunday: Mix of clouds and sun. Shower possible. Lows: Low-to-mid 80s.

FORECAST IN DETAIL


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.

If you live in a low-lying area or near a flood plain, please pay attention today and even after Andrea’s rains end. Our catchment area, upstream from D.C., started receiving substantial amounts of rain even earlier than us, so plenty of water is on its way. Exiting slowly into tomorrow, departing rains take along a bit of the humidity. But it doesn’t go away completely. The weekend should offer some drier periods, though rain remains in the forecast off and on through the beginning of next week.

Today (Friday): Our entire area has essentially a 100% chance of seeing substantial rain (generally 1-3”+ new possible, though some spots could see less or more). Even a few rumbles could be embedded within. Despite this heavy-at-times rain, our high temperatures should still manage to get into the mid-70s, with a few spots, south of town mainly, maybe closer to 80. Easterly winds of 10-15 mph could gust toward 35 mph in a strong rain band, so commuting won’t exactly be pleasant. We expect the heaviest rains between midday and early evening hours, perhaps focused on the commute home. Confidence: Medium-High

Tonight: Periods of heavy rain continues to be a risk through the evening, but it should tend to taper as we go into the night. Whew. Chances of rain drop from early evening 70% chances to about 20% after midnight. North winds slowly shift to the northwest at 5-10 mph and temperatures move slowly down into the mid-to-upper 60s for lows. Confidence: Medium

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend…

Tomorrow (Saturday): We may still have some lingering tropical moisture in our region as there’s no fresh air push behind Andrea, so there remains some mugginess and a risk of showers. Even an isolated rumble of thunder? Luckily, though, we have sent our heavier rains northward. This should allow the Lawyers Have Heart 10K in Georgetown to proceed. Even a few peeks of sunshine are possible at times within that 30-40% chance of afternoon showers. High temperatures may get up into the low-to-mid 80s. Westerly breezes at 5 to 10 mph could assist us just a bit with potential warming. Confidence: Medium

Tomorrow night: Clouds should generally dominate but some clear patches of sky could be possible also, as shower chances (15% by midnight) eventually die down fully. While it may be prudent (check back tomorrow) to grab the umbrella if heading out, at least deluges won’t prevent you from enjoying the evening. Good news, right? Low temperatures could hover around 70 downtown, but mid-60s are possible outside the Beltway. Confidence: Low-Medium

Sunday: We see “self destructive sunshine” wherein the diurnal, daytime heating bubbles up more and more clouds as the day wears on. The sunshine is its own demise! Ok, perhaps not that dramatic, but a few afternoon light sprinkles or showers are possible, followed by peeks of sunshine—and repeat a few times. Chances of measurable rain are only about 30%, but nothing heavy is really expected. High temperatures still manage to pierce the 80 degree mark, with low-to-mid 80s possible. More sunshine than currently expected may portend higher temps, especially south of town. Confidence: Low-Medium

A LOOK AHEAD

Sunday night: Skies remain partly cloudy, with a continuing 30% chance of showers peppering our evening. Low temperatures should get into the 60s for everyone. Hopefully as “cool” as the upper 60s—even downtown.. Confidence: Low-Medium

Monday brings a cold front toward us from the west. With a south to southwest breeze likely at times out ahead of it, temperatures should increase and humidity will be noticeable. We could have some clouds, but enough sun, overall, to boost high temperatures into the “decently warm” classification of mid-to-upper 80s. Shower and storm chances increase as the day wears on, perhaps as high as 60% chance during the late afternoon. Confidence: Low-Medium

Tuesday’s skies should show us some sunshine at times, but there is a 30-40% chance of a few showers or storms since our cold front could linger and still be near our vicinity. The air could be a bit muggy still as well with high temperatures in the 80s. Confidence: Low