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Posted at 10:00 AM ET, 10/12/2009

Forecast: Super Start to Work Week, Foul Finish

By Jason Samenow

Cold rain likely at times late Wed-Sat

* Outside Now? Temps, Clouds, Webcam & More: Weather Wall *
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EXPRESS FORECAST

Today: Mostly cloudy. 60-63. | Tonight: Mostly cloudy. Slight chance of a light shower. 50-55. | Tomorrow: Partly sunny, breezy. 65-70. | A Look Ahead

FORECAST IN DETAIL

Lucky for those of you with today off (I know many of us have to work), the stretch of excellent autumn weather continues -- notwithstanding some increasing cloud cover. Enjoyable conditions persist into Wednesday, but then it's downhill in a big way starting late Wednesday through at least Friday. A raw, soaking rain looks like a strong possibility. Whether the rain moves out by the weekend is an open question. Sunday shows more promise for clearing than Saturday at this early juncture.

Clouds: Latest mid-Atlantic infrared satellite loop, courtesy Unisys. Click here to expand. Refresh page to update. What's Z-time?. See more maps on our Weather Wall.

Today (Monday): No doubt, the day will begin on the chilly side and be more cloudy than sunny. There should be enough sun to get us to 60 or perhaps a little higher but it will be brisk. Winds will be light from the east, at 5-10 mph. Confidence: Medium-High

Tonight: A relatively weak weather front will skirt through the area, producing some clouds but probably little or nothing in the way of rain (80% chance of no rain). Lows will range from near 50 in the cooler suburbs to the mid-50s downtown. Confidence: Medium-High

Keep reading for the forecast through the work week

20091011_4634.jpg
Beautiful blue skies and some early foliage in Adams Morgan yesterday. By CWG photographer Ian Livingston

Tomorrow (Tuesday): Sunshine will return in force Tuesday behind the so-called front (whose main effect will be to change the wind direction, rather than cool the air). Temperatures will rise back up well into the 60s to near 70. It will be a little breezy, with a wind from the northwest at 10-20 mph. Confidence: Medium-High

Tomorrow Night: Under mostly clear skies, we'll have another crisp fall night. Lows will drop to near 40 in the cooler suburbs with upper 40s downtown. Confidence: Medium-High

A LOOK AHEAD

On Wednesday, sunshine in the morning will yield to increasing clouds during the afternoon, with a 40% chance of rain by the P.M. commute. High will be near 60. Confidence: Medium

Rain is likely periodically (i.e. with breaks in the action) late Wednesday through Saturday as several waves of low pressure develop to the south and head up the coast. The exact track and timing of the various lows will determine how much it rains, where, when and for how long. But - in all likelihood -- everyone will get some appreciable rain during this period, and it will be mainly cloudy and raw. I'm thinking highs will be 50-55 during this stretch with lows in the 40s. It will probably also be breezy, with a wind from the east and northeast at 10-20 mph. Confidence: Medium

A few showers could (25% chance) linger into Sunday morning, but my best guess at this point is that we'll have slow clearing by afternoon. A very chilly air mass is likely to follow the departing storm, with temperatures not making much headway through the 50s. Confidence: Low-Medium

By Jason Samenow  | October 12, 2009; 10:00 AM ET
Categories:  Forecasts  
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Next: An Encounter with Deer in Washington, D.C.

Comments

Maybe October is the cruelest month....

But we can use the rain.

Posted by: jaybird926 | October 12, 2009 6:33 AM | Report abuse

Decidedly overcast this morning, and the temp actually dropped a degree in the past hour. Hoping to see more sun soon!

Posted by: weathergrrl | October 12, 2009 8:06 AM | Report abuse

jaybird926: good philosophy :-)
weathergrrl: just a little more time... we'll see some sun! :-) it is a little chilly, eh?
Can you all believe folks are breaking out their scarves right now?! anyone else doing this? :-)

Posted by: Camden-CapitalWeatherGang | October 12, 2009 9:33 AM | Report abuse

Doesn't seem like we're going to get many breaks in the clouds today. Forecast updated, and nice day sun removed :(

Posted by: CapitalWeatherGang | October 12, 2009 10:17 AM | Report abuse

When will the forecast for Saturday clear up (no pun intended)? I am planning my child's birthday party and would like an idea of what might happen hopefully a few days out. Thanks.

Posted by: ArlingtonWeather | October 12, 2009 11:19 AM | Report abuse

It looks mighty nasty later this week--but my main dance nights are tonight & tomorrow--Friday looks like the only dance night affected though I may have to visit Ballston most afternoons from tomorrow on this week.

IT IS DRY--BUT WE SURE DON'T NEED THE RAW WEATHER!!!

My mother reports it is snowing hard up in Eau Claire, WI--they expect about two inches!!!

Posted by: Bombo47jea | October 12, 2009 1:09 PM | Report abuse

a friend of mine says he remembers a washington area snow in october. he says it was between 10 and 20 years ago. anybody have any info on this?

Posted by: walter-in-fallschurch | October 12, 2009 1:27 PM | Report abuse

@walter-in-fallschurch

Here's a link to an earlier post: Snow in October?

@ArlingtonWeather

We should have a better idea about rain prospects for Saturday by Wednesday.

Posted by: CapitalWeatherGang | October 12, 2009 2:15 PM | Report abuse

thanks guys. guess i missed that post. it's exactly the kind of thing i was lloking for. eagerly awaiting your wintoer outlook.

Posted by: walter-in-fallschurch | October 12, 2009 2:34 PM | Report abuse

High so far in NW Montgomery - 54.7

Posted by: MKadyman | October 12, 2009 3:45 PM | Report abuse

What's the departure from normal temp wise for Sept/Oct?

It sure feels like we've been way below normal for some time now.

I know normal highs are still in the upper 60's but if the forecast holds for later this week, we'll be 15-20 degrees below that for several days.

Not good. Fall is supposed to be the nice time of year.

Posted by: ThinkSpring | October 12, 2009 4:11 PM | Report abuse

It sure feels like we've been way below normal for some time now.

It was 80 degrees last Friday. Short memory, eh?

Posted by: Axel2 | October 12, 2009 4:52 PM | Report abuse

@Axel2

Re: the 80 degrees on Friday. Yes, we've had what seems like 1-2 days per week above normal recently, but the rest of the week has been well below normal. My question meant the average temp over the last 6 weeks or so.

Posted by: ThinkSpring | October 12, 2009 8:55 PM | Report abuse

Using heating degree days as a measure, Dulles is -61 since Sept. 1.

Posted by: ThinkSpring | October 12, 2009 8:59 PM | Report abuse

Even if we get some decent rain this week it will be 3 weeks since we last had anything appreciable (9/26). It's just pathetic. Now if we miss it, we may go rainless the whole month of October.

Posted by: LoudounGeek | October 12, 2009 9:58 PM | Report abuse

The comments to this entry are closed.

 
 
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