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Posted at 5:00 AM ET, 06/ 8/2010

Forecast: Terrific today; wet Wednesday

By Matt Rogers

* NatCast: Super for Strasburg | Sunday storm recap *
* Outside now? Radar & more: Weather Wall*

Today's Daily Digit
A somewhat subjective rating of the day's weather, on a scale of 0 to 10.
10I challenge you to complain about this June day.
Get tomorrow's 'Digit' on Twitter tonight


Today: Mostly sunny and comfortable. 76-79. | Tonight: Increasing clouds. 58-62. | Tomorrow: Showers, storms, and clouds. 74-78. | A Look Ahead | Get Express Forecast by E-mail


Canadian high pressure can be such a gift when we are in the summer months. Yesterday's high of 78 at National Airport was four degrees cooler than normal, while Dulles was a full six degrees cooler than climatology. The cool air mass is with us again today and will not come at the expense of sunshine either. Things change quickly tomorrow though as low pressure arrives to bring showers, storms, and clouds.

Today (Tuesday): We are graced with mostly sunny skies with just some fair weather clouds at times. Highs reach the mid-to-upper 70s with very light breezes from the northwest. Confidence: High

Tonight: Clouds will be increasing overnight and there is a 20% chance of showers or a thunderstorm very late at night. Lows are expected to still be comfortably in the upper 50s to low 60s. Confidence: Medium

Keep reading for the forecast through the weekend...

Tomorrow (Wednesday) will be our dreariest day of the week with lots of clouds and frequent showers and storms (70% likelihood). Highs should again be in the mid-to-upper 70s, but most of the day will probably be cooler due to clouds and precipitation. Rainfall totals could range from .5" to 1" throughout the area by the time it ends Wednesday evening. This situation should be more widespread with the heavier totals compared to our previous weekend storms. Variable winds at 5-10 mph. Confidence: Medium

Tomorrow Night: Evening showers and storms are expected (60% likelihood) followed by mostly cloudy later at night. Lows drop to the low 60s. Confidence: Medium


Thursday and Friday I expect it to be partly to mostly sunny, a bit warmer (low-to-mid 80s), and without rain. Lows should be in the low-to-mid 60s. Overall Friday should be slightly warmer than Thursday and slightly more humid too. But temperatures will be just about normal. Confidence: Medium

Oh woe the weekend. After a number of stellar days this week, the weekend is not looking as nice overall. However, if you prefer summer heat, then this weekend should play well for you as highs should be at or above 90 degrees under partly sunny skies Saturday and partly to mostly cloudy skies on Sunday. A surge of moisture should add the uncomfortable high humidity component. Afternoon and evening thunderstorms are possible on Saturday and probable on Sunday as a cold front approaches by afternoon and evening. Lows should be in the 70s. Refreshing Canadian high pressure could visit us again early next week. Confidence: Low-Medium

By Matt Rogers  | June 8, 2010; 5:00 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: NatCast: Super weather for Stephen Strasburg
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Strasburg's debut, Ken Burns as the first tosser, Pudge coming back, Harper selected, sold out game, national spotlight on DC, perfect weather, Ten it is!!

Posted by: jaybird926 | June 8, 2010 6:59 AM | Report abuse

Thunderstorm threat tomorrow???

I'm not completely sold on that...there's no mackerel sky this morning. If the high clouds later today include a preponderance of cirrocumulus/altocumulus, the approaching warm air is likely to be unstable and there's a good chance for thunder...but if only mares' tail cirrus shows up, a cool soaking rain, but little or no thunder is likely.

Watch the sky for high clouds later today.

Posted by: Bombo47jea | June 8, 2010 7:44 AM | Report abuse

That's a great point Bombo. I had actually considered taking that threat out when I did my update given the type of system we are expecting. I definitely don't expect anything severe tomorrow, but perhaps rumbles of thunder embedded in heavier convective activity.

Posted by: MattRogers | June 8, 2010 7:55 AM | Report abuse

Dang! Bombo needs to join the Gang.

Posted by: MKadyman | June 8, 2010 8:43 AM | Report abuse

Nice chill earlier this morning... 51F in the Blue Ridge Mtns

Posted by: spgass1 | June 8, 2010 9:19 AM | Report abuse

Can it be true? Bombo actually supporting a cool, soaking rain?!?

Yeah to Kadyman's recommendation that Bombo join the gang! I always learn from his technical details.

So let the rain begin! Reduce the rainfall deficit in D(rought) C(ity)!

Posted by: TominMichiganParkDC | June 8, 2010 10:49 AM | Report abuse

The system for tomorrow has been shifting north the past few days. Given recent history I would guess it will not produce as well as modeled around here.

Posted by: Ian-CapitalWeatherGang | June 8, 2010 11:50 AM | Report abuse

Today completely totally deserves a 10. How amazing is it?? :)

Posted by: Camden-CapitalWeatherGang | June 8, 2010 12:27 PM | Report abuse

TominMichiganParkDC - quick note, the latest figures I have seen don't have DC near a drought scenario. Unless I am missing something? Let us know what you are examining...

Posted by: Camden-CapitalWeatherGang | June 8, 2010 12:28 PM | Report abuse

Update...I've seen a few patches of high cloud and it's tending toward cirrocumulus, but some of it seems to be contrail-related...otherwise it's clear as a bell, so to speak. But there hasn't been a progressive invasion of high clouds quite yet. Sterling say that ordinary diurnal cumulus is suppressed by the high pressure today.

Otherwise, I've been noting somewhat of a northward shift in the Great Lakes low...this could lower the rainfall totals. As for a drought...not too much evidence though the rain amounts have been tending lower than forecast. It will be interesting to see how tomorrow verifies...looks a bit like a couple hours of warm-front rain with much of the precipitation passing to our north. Thunderstorm areas seem to be centered on Missouri and Texas...could be the beginnings of another D.C. split, though the Texas area is moving north rather than east.
As for possibly joining the CWG, I'm retired and will be looking at volunteer opportunities chiefly here in Arlington County. Right now the best shot looks like the Long Branch Nature Center, and possibly the Gulf Branch Nature Center here in Arlington County [my master's degree is in botany]...the Gang is another possibility.

Posted by: Bombo47jea | June 8, 2010 2:31 PM | Report abuse

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