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Posted at 6:00 PM ET, 04/18/2010

Forecast: A chilly Sunday, but turning milder

By Brian Jackson

* Frost Advisory tonight for western suburbs (map) *
* Pollen, AQI, & UV: Health page *
* Follow CWG on Facebook and Twitter | Weather Wall *

Today's Daily Digit
 
A somewhat subjective rating of the day's weather, on a scale of 0 to 10.
 
5Cool and windy, but it could be worse.
 
Get tomorrow's 'Digit' on Twitter tonight

EXPRESS FORECAST

Today: Becoming sunny, chilly wind. 58-63. | Tonight: Clear skies and cool. 37-44. | Tomorrow: Sunny and milder. 63-67. | A Look Ahead | Get Express Forecast by E-mail

FORECAST IN DETAIL

When the last several cold fronts have passed through the region, temperatures have quickly rebounded into the 70s and 80s. This time the warm-up won't be so fast, but I don't think we'll have much to complain about. While today holds a bit of a chill, we'll soon be rewarded with seasonable temperatures warming into the mid-to-upper 60s and plenty of sunshine.

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 (Sunday): Cool temperatures and continued gusty winds sum up today. We may have some cloud cover during the morning and early afternoon hours. Otherwise, it will be mostly sunny with temperatures reaching around 60 degrees. Winds continue out of the northwest at 10-15 mph, with some higher gusts. Confidence: High

Tonight: Another chilly night is in store for us tonight. Lingering winds will mix the air enough to prevent temperatures from really tanking, though the breeze will carry a bite. Mostly clear skies, very low moisture, and a teeny waxing crescent moon will make it a fine night for star-gazing, as long as you're bundled up. Downtown, lows will reach the upper 30s to low 40s, while those in the colder suburbs might want to take in some of your more fragile flora, with temps dipping into the mid-30s. Winds will continue from the northwest at near 10 mph. Confidence: High

Keep reading to see when warmth returns....

Tomorrow (Monday): Under mostly sunny skies, a gradual warm-up begins with daytime highs in the mid-60s. A reduction in wind speed will also make the air feel warmer -- decreasing to near 10 mph from the northwest. Confidence: High

Tomorrow Night: We'll have another chilly night, though not as cold as the last two. Partly cloudy skies will prevail once again, and temperatures in most spots should stay north of the 40 degree mark. Still some suburbs will dip into the upper-30s. Confidence: Medium-High

A LOOK AHEAD

Seasonable conditions continue to Tuesday. Mostly sunny skies again take hold as a high pressure system sits to our west. Temperatures will climb another degree or two, topping out in the mid-to-upper 60s. Overnight, with a little more moisture coming up from the south, lows will be a touch milder, in the upper-40s beneath partly cloudy skies. Confidence: Medium-High

Wednesday will hold our best shot for returning to the 70 degree mark. Sunny skies will continue for the early part of the day with some higher clouds thickening by the evening commute. Highs will reach to near 70, and there will be a chance of showers moving in during the late evening and overnight . Confidence: Medium

By Brian Jackson  | April 18, 2010; 6:00 PM ET
Categories:  Forecasts  
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Comments

It's 32 here this AM on the river SW of Front Royal. The dewpoint is also 32, with a slight amount of frost on the roof of the car. The windshield is damp with dew but probably supercooled.

Posted by: eric654 | April 18, 2010 7:41 AM | Report abuse

hi there. just checking in - and as usual, i'm wondering about snow.... do you guys have any insight as to whether this iceland volcano is the "right kind" and big enough to have any effect on our weather? specifically, will it make it colder next winter - thus increasing the chances of snow?

Posted by: walter-in-fallschurch | April 18, 2010 12:01 PM | Report abuse

My thinking is that this eruption does not significantly cool the earth, though Laki did cool the earth in a similar eruption during the 1700's. The guidance I am now hearing is that the current eruption's ash is not high enough in the atmosphere for a significant cooling effect.

Posted by: Bombo47jea | April 18, 2010 12:43 PM | Report abuse

I mostly agree with Bombo47jea. We are not talking about Toba or even Pinatubo that hurled SO2 20 miles up into the stratosphere where it hung out for a few years. 7 miles is not nearly enough to do that.

OTOH there are still going to be some low level aerosol effects, probably more low level cloud cover and short term cooling from that.

Posted by: eric654 | April 18, 2010 3:49 PM | Report abuse

hhhmmmm..... particulates not HIGH enough in the atmosphere...? too bad...oh well.

Posted by: walter-in-fallschurch | April 18, 2010 4:17 PM | Report abuse

Yet, Pinatubo only erupted for nine hours, so if this Volcano goes on like this for weeks, or even months, then it will obviously have an impact upon the Global Climate (At least a regionalized portion of it), regardless of the altitude of its particulate expulsion. Pinatubo released between 15-30 million tons of SO2, so if/when Eyjafjallajokul's output reaches that range, then I would say that it stands a very real chance of causing substantial Global, if not at least Polar climate effects. If it stops now however, then yes, I do believe that any climate impact would be extremely minimal, and extremely localized to boot.

Posted by: TheAnalyst | April 18, 2010 6:55 PM | Report abuse

When will the high pollen counts start to decrease?!

Posted by: icecubedownthetoilet | April 18, 2010 7:32 PM | Report abuse

re: questions about the volcano

We'll have a feature on this tomorrow...

Posted by: Jason-CapitalWeatherGang | April 18, 2010 8:04 PM | Report abuse

Pollen counts should be decreasing now as the oak blossoms are tending to dry up and fall. The remaining trees [hickory, walnut, chestnut, etc.] generally produce less pollen than the oaks. I was even seeing huge oak-blossom "rollers" or "dust bunnies" blowing around on the streets in yesterday's and Friday's breezes.

Some TV mets are hinting that next weekend could be a "total washout". This may be a bit exaggerated, as temperatures are expected to hit the seventies or eighties...thus implying some periods of heavy convective rainfall or even severe weather but not a total washout [which to me would imply 2 or 3 days of raw, windy fiftyish weather with continual or near-continual rain!]. It's again being said we "need" the rain and that DCA is "2 inches behind"...again I think this is a bit exaggerated, as we have plenty of groundwater from the recent snowmelt. As I see things, we could go until Labor Day or so without rain before we need to worry about a real groundwater shortage around here.

Posted by: Bombo47jea | April 18, 2010 8:07 PM | Report abuse

I have noticed the ground is a little dryer, like the top two inches are kind of dry. so, I think i can go ahead and do some outdoor painting because it won't rain for a few days.

Posted by: celestun100 | April 18, 2010 8:50 PM | Report abuse

I heard that washout term too.

I think it is irresponsible reporting. too far out, should have said chance of rain at this point, or chance of thunderstorms.

washout to me is all day rain. Are they saying we have a chance at that?


Posted by: jaybird926 | April 18, 2010 9:20 PM | Report abuse

thanks for the volcano talk. i'll check in later for the volcano post.

Posted by: walter-in-fallschurch | April 19, 2010 7:30 AM | Report abuse

The comments to this entry are closed.

 
 
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