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Posted at 11:00 AM ET, 04/24/2009

Forecast: Temperatures On Their Way...Way Up

By Josh Larson

Sunny, summery weather builds this weekend

* NWS Media Day | Niagara Falls in Spring *

EXPRESS FORECAST

Today: Chilly start; then warmer. 72-76. | Tonight: Quite mild. Near 60. | Tomorrow: Sunny & very warm. Mid-to-upper 80s. | Saturday night: Mostly clear; very mild. Mid-60s. | Sunday: Mostly sunny and hot. Near 90! | A Look Ahead

FORECAST IN DETAIL

Though the past couple of days have featured below-normal temperatures, and we're running about a degree below normal for the month, warmth will pay a visit to the area today all the way through the first half of next week. We tack on 10 degrees today to yesterday's highs and then another 10 degrees on Saturday. We may even approach 90 by Sunday -- zooming full speed to mid-to-late summer-like temperatures.

Today (Friday): Despite a chilly start in the morning, a ridge of high pressure along the East Coast will allow for mostly sunny skies and temperatures some 10 degrees warmer than yesterday courtesy 10-15 mph winds from the south. Highs should top out in the low-to-mid 70s.

Tonight: With flow from the south we'll see much milder overnight lows -- nearly 20 degrees warmer than last night's lows -- in the low 50s (in the cooler suburbs) to near 60 (downtown) under mostly clear skies. Confidence: High

Keep reading for the summery forecast into the start of next week, and visit us anytime at washingtonpost.com/capitalweathergang.

Tomorrow (Saturday): With winds from the south persisting, we'll really get a taste of summer on Saturday. Bust out the shorts! Mostly sunny skies will allow afternoon highs to soar to the mid- to perhaps even upper 80s in some spots. For some, it may well be the first use of A/C in your car (even house?) of the season. Confidence: High

Tomorrow Night: Expect almost balmy conditions for this time of year Saturday night, with temperatures only dropping to the low 60s overnight dowtown (50s in the suburbs) -- a good 15 degrees above the average overnight low for this time of year. Confidence: High

Sunday: Abundant sunshine and warm winds from the southwest at 5-10 mph on Sunday will allow the mercury to soar to the upper 80s to 90 across most of the region. The exception will be areas along the bay and in the mountains to the west, which will probably register 10+ degrees cooler than the rest of the area. Sunblock is highly advised. Mild overnight lows will drop to the upper 50s and low 60s. Confidence: High

A LOOK AHEAD

At the risk of sounding like a broken record, another day of full sunshine and warm temperatures are on tap for Monday. Highs may take another run at 90 degrees. Overnight lows will bottom out at around 60. Confidence: Medium-High

More of the same can be expected on Tuesday with mostly sunny skies once again allowing afternoon highs to reach the mid-80s across the vast majority of the region. Increasing clouds are possible Tuesday night ahead of a potential approaching cold front, which brings the chance for showers and thunderstorms on Wednesday. Confidence: Medium

By Josh Larson  | April 24, 2009; 11:00 AM ET
Categories:  Forecasts  
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Comments

Eighty-nine degrees. 89. Eighty-9.

Wow.

"That's waaahhhmm!" as my Massachusetts relatives would say.

Posted by: wrytous | April 24, 2009 7:20 AM | Report abuse

"zooming full speed to mid-to-late summer-like temperatures."
With a southwest wind and warmer temps., are we expecting mid-summer-like dew points also? 85 to 90 is warm yet not to uncomfortable if the dew points stay in the 50's or even low 60's. What can we expect?

Posted by: pjdunn1 | April 24, 2009 9:27 AM | Report abuse

pjdunn1,
NWS (weather.gov) predicts dewpoints in the 50's (Accroding to their hourly weather graph expanding 2 days out). So looks like a Nice weekend!!!!!!

Posted by: dprats21 | April 24, 2009 9:52 AM | Report abuse

dprats21,

Thanks!

Posted by: pjdunn1 | April 24, 2009 11:23 AM | Report abuse

Finally...a dance night without any rain threat...I'm not so sure about Monday and Tuesday [which could feature an evening thunderstorm or two if a backdoor front sags too closely to our north].

On the other hand, a dry spell could aggravate an estimated remaining one to two inch precipitation deficit. Best rain chance ATT looks to be Wednesday, when an east-west front is draped across our area. It may pass to our south as a cold front then return north as a warm front. The time frame is late Tuesday to Thursday.

Posted by: Bombo47jea | April 24, 2009 1:24 PM | Report abuse

@Bombo47jea,

I generally agree with your assessment. I think it will be largely dry through at least the second half of the day Tuesday (though I can't totally rule out the 10% chance of a "pop-up"/instability thunderstorm late in the day Saturday, Sunday, or Monday).

That said, I think we have a decent chance of rain, and perhaps even thunder, late Tuesday into Wednesday -- and, as you've implicitly intimated, if the front slows down then precipitation may also be possible on Thursday.

Posted by: Josh-CapitalWeatherGang | April 24, 2009 1:59 PM | Report abuse

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