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Posted at 11:00 AM ET, 09/27/2009

Forecast: Showers, Partial Clearing, Then Cooling

By Brian Jackson

* NatCast | UnitedCast | Outside Now?: Weather Wall *
* Rain Totals Thru Last Night - DCA: 1.61", IAD: 1.10", BWI: 1.31" *

Today's Daily Digit
A somewhat subjective rating of the day's weather, on a scale of 0 to 10.
7Crisp a.m. but mild p.m. And some sun, on a weekend too! Get tomorrow's 'Digit' on Twitter tonight


Today: Spotty, lingering showers, and peeks of sun. 72-76. | Tonight: Partly cloudy. 54-59. | Tomorrow: Partly sunny, chance of a shower. 74-77. | A Look Ahead | Get Express Forecast by E-mail


Drier weather will be slowly work its way towards us but won't truly arrive until Tuesday. Before then, we'll still have the threat of some occasional showers, though they'll likely be few and far between. After a powerful cold front breezes through late Monday, look forward to an extended stretch of fall temperatures to go along with sunny skies.

Radar: Latest D.C. area radar loop shows movement of precipitation over past two hours. Powered by HAMweather. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today (Sunday): After yesterday's/last night's deluge, we'll be slow to dry out, but we will see marked improvement. Showers should be ending west-to-east during the morning hours with another round of light showers possible (30% chance) during the afternoon. With a cold pool of air in the upper atmosphere, any sun may create enough instability to produce these light showers. This sun will also make the temperature forecast tricky, with temperatures near 70 in overcast areas, but a quick shot of sun could easily push some locales to the mid-70s. Winds will be westerly at 5-10 mph.Confidence: Medium-High

Tonight: Overnight we should see some partial clearing. Under these partly cloudy skies we'll have quite a nice evening to recharge for the work week. Overnight lows will generally dip into the mid-50s with some upper 50s to near 60 downtown. Winds will be from the west/southwest at 5-10 mph.Confidence: High

Keep reading for the forecast to begin the work week...

Tomorrow (Monday):Another, stronger cold front will swing through the area Monday afternoon/evening. However, this front will have less moisture (compared to yesterday's) to work with and we'll only see a 30-40% chance of rain showers developing. Highs will warm into the mid-70s and winds will become breezy, increasing from the west/southwest at 10-20 mph. Confidence: Medium

Tomorrow Night: While the front continues to work through I can't rule out a shower or two early, but most of us should see a rain-free night. Clouds will begin to clear as northwest flow will quickly bring in some drier air. Overnight lows will turn cooler, with low-to-mid 50s downtown with a few upper-40s scattered in the cooler suburbs. Winds will be west/northwest at 5-15 mph. Confidence: Medium-High


Tuesday and Wednesday you'll definitely notice that a cold front has come through as fall-ish weather takes over the region. We'll have plenty of sun but temperatures will struggle to break 70 both days.
Overnights will be brisk as well. Under partly cloudy skies temperatures will fall off overnight, with lows in the upper40s and lower 50s. Confidence: Medium-High

By Brian Jackson  | September 27, 2009; 11:00 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: UnitedCast: Some Sun, Slim Shower Chance
Next: NatCast: Breezy Baseball


Wonderful! I couldn't hope for a better transition to fall this week: Some rain, some sun, and some decent WIND! I do hope that Bombo's dance wasn't too soggy last night, though.

Posted by: --sg | September 27, 2009 8:40 AM | Report abuse

Things worked out at the National Book Festival. Stayed dry from the opening 10 am to about 2 pm. Heavy stuff started when I was home, around 5 pm. Ken Burns declined an umbrella around that time so I don't think it was raining hard.

Posted by: jaybird926 | September 27, 2009 9:35 AM | Report abuse

Virginia Blue Ridge Report

Rain event total: 1.5"

Currently cloudy and 60.3F. I can see some blue sky through the trees off to the west.

I'm looking forward to watching the first part of Ken Burns' new series on pbs about the national parks.

Posted by: spgass1 | September 27, 2009 10:49 AM | Report abuse

Some pretty heavy showers this afternoon with the cold upper-pool. The sun coming out around noon, with the lingering moisture, really did the was nice for a couple of hours, and then things really let go with the towering cumulus. I had heavier rain, with huge raindrops, in Fairfax, around 3-3:30 PM, than with a lot of thunderstorms I've seen, but, strangely, no lightning.

Posted by: MMCarhelp | September 27, 2009 6:49 PM | Report abuse

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