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Posted at 05:00 AM ET, 03/29/2011

Forecast: Wintry week wears on

Sunny today before inclement weather returns

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

 
This day is better than yesterday and probably the best day of the week, but still chilly.
 
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EXPRESS FORECAST

Today: Mostly sunny. 49-54. | Tonight: Becoming cloudy, cold. 30-35. | Tomorrow: Rain, maybe mixed with snow. 40-45. | A Look Ahead | Get Express Forecast by E-mail

FORECAST IN DETAIL

You know the saying that “it is always darkest before the dawn”? Well, the current cold is certainly the most irritating before warm weather firmly becomes established. Although the chill won’t feel so bad with today’s sunshine, why is spring giving us the “cold shoulder”? The jet stream pattern is currently set up in such a way to continue to transport significant Canadian cold air supply into the U.S. In addition, a series of storms passing to our south from tomorrow through late Friday will keep us cloudy and wet. This chill looks to take a break next week, but I can’t guarantee we can say a complete goodbye to winter yet.

Snow Potential Index: 1 (→) - Wet flakes may mix in with rain opportunities Wednesday and Friday, but accumulation chances are remote.
 
The SPI is a daily assessment of the potential for accumulating snow for the next week on a 0-10 scale. Get the 'SPI' on Twitter
 

Temperatures: Latest D.C. area temperature map powered by iMapWeather (base map by Google). Click and hold on map to pan. Double-click to zoom. Refresh page to update. See larger map on our Weather Wall.

Today (Tuesday): Canadian high pressure centered around the Great Lakes keeps feeding a cool flow over our area today. The March sun moderates this air mass enough to give us the upper 40s to low 50s today with just light winds. The air mass is still very dry (low dew points). Confidence: High

Tonight: Increasing clouds tonight with lows in the low-to-mid 30s and a chance (20-30%) of early morning rain or light snow (mainly in the colder north and west suburbs). Winds are light. Confidence: Medium

Keep reading for the forecast through the weekend...

Tomorrow (Wednesday): Low pressure traveling through the Southeast to the Carolinas is typically a good route for D.C.-area snow during the core of the winter. But here at the very end of March, temperatures are expected to be very marginal or too warm, especially during the day. Rain today with a chance for some snow mixed at times in the northern and western suburbs. Highs are in the low-to-mid 40s under cloudy skies, except only in the upper 30s to near 40 toward Loudoun and Frederick counties. Confidence: Medium

Tomorrow night: Rain or mixed rain and snow probably ends before midnight, leaving just light drizzle and fog. It’s raw with lows in the mid-to-upper 30s. Confidence: Medium

A LOOK AHEAD

Thursday remains mostly cloudy with a chance (40%) of rain re-developing in the afternoon. Highs are only in the 40s again (whereas we average the low 60s!). Rain is likely Thursday night, possibly mixing with or changing to snow late (particularly in the colder suburbs) with lows in the 30s. Confidence: Low-Medium

Scattered showers of rain and/or snow remain possible through Friday. It is still cloudy and cold with highs 40-45. On Friday night, most models now have low pressure heading out to sea with perhaps some partial clearing. Lows are in the 30s. Confidence: Low

Over the weekend , conditions gradually attempt to improve. Saturday is probably one of those mixed cloud cover days with brisk winds from the north and northwest. We can’t rule out some showers, but enough sunshine breaks through to at least get us back into the 50s finally. Saturday night looks partly cloudy and still cold with lows in the 30s. But I see some better weather shaping up for Sunday with winds shifting to come from a more westerly direction, more sunshine, and a run at around 60 degrees. We could use it after this week! Confidence:Low-Medium

By  |  05:00 AM ET, 03/29/2011

Categories:  Forecasts

 
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