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Posted at 5:00 AM ET, 07/31/2010

Forecast: Satisfactory Saturday, showery Sunday

By Jason Samenow

* Weather with attitude? | Record snow not due to global warming *
* Outside now? Webcam, clouds & more: Weather Wall | NatCast *

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


This is a pretty nice day. Compared to last Saturday, it's a 10+!
Get the 'Digit' on Twitter


Today: Mostly sunny, some increase in clouds late. 85-89. | Tonight: Slight chance of showers or t'storms, mainly late. 68-74. | Tomorrow: Scattered showers and t'storms (50-60% chance). 82-86. | A Look Ahead | Get Express Forecast by E-mail


If there's one really good thing to say about this weekend, it's that we won't have to contend with any extreme heat. We may, however, have to deal with showers and thunderstorms -- mainly Sunday. The other negative is that our reprieve from the humidity only lasts through this afternoon. Overnight, tomorrow and well into the next week, characteristic August humidity will assert itself - right on schedule.

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 (Saturday): Relatively cool temps (in the 60s) and sunny skies early this morning will invite a morning stroll or jog. It does become seasonably warm this afternoon, as temps climb into the mid-to-upper 80s. We'll probably see some increase in cloudiness as well, but humidity will remain pretty comfortable. You won't notice much in the way of wind, blowing from the south at 5-10 mph. Confidence: Medium-High

Tonight: Skies become mostly cloudy but it should be dry for most evening activities. After midnight, an disturbance approaches the region, so there's a slight (20-30% chance) of a shower or thunderstorms late at night. Lows range from the upper 60s to low 70s. Confidence: Medium-High

Keep reading for the forecast into early next week...

A rainbow over Cleveland Park Thursday evening. By CWG photographer Ian Livingston.

Tomorrow (Sunday): As a disturbances passes through the region, we'll have considerable clouds and a decent (50-60%) chance of showers and storms. If the sun is able to break out for any period, that will increase the possibility that some storms turn strong to severe. The cloud cover probably caps high temperatures in the mid-80s though humidity levels will rise relative to the last couple of days. Confidence: Medium

Tomorrow Night: As the disturbance pulls away, more stable air moves over the region, decreasing the chance of storms (down to about 20-30% - mainly early). Skies will become partly cloudy, with lows from the mid-60s in the cooler suburbs to the low 70s downtown. Confidence: Medium-High


Monday and Tuesday look like pretty typical August days. Both days will be partly sunny and on the humid side while featuring a 30% chance of afternoon/evening storms. Highs temps range from the mid-to-upper 80s Monday to around 90 Tuesday. Overnight lows will be in the upper 60s (suburbs) to low-to-mid 70s inside the beltway. Confidence: Medium

By Jason Samenow  | July 31, 2010; 5:00 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: NatCast: Feeling good for the Phillies
Next: July warmth record tied at Washington, D.C.


Thanks for the perfect garden weather forecast. Rain & sun.....not too hot.
No more 100+ degree days 2010!
The AC is finally off. It's great to have the windows open, but our Centreville neighborhood is very noisy with cicada calls & those suckers started up EARLY.

Posted by: FIREDRAGON47 | July 31, 2010 9:26 AM | Report abuse

FIREDRAGON47 - glad you can get some gardening done! and yes, I hope for no 100F days either--but still slightly possible this summer. Cicada locusts started in downtown DC the last week of June.. the heat may have brought them out way early, perhaps?

Posted by: Camden-CapitalWeatherGang | July 31, 2010 10:39 AM | Report abuse

Last night's "warm" low at DCA of 71 puts us back in the running pretty well to tie for warmest July on record. Looks like we need an 86 today to get there. Down to the wire...

Posted by: Ian-CapitalWeatherGang | July 31, 2010 11:22 AM | Report abuse

Any update on the potential for rain tomorrow? I have an outdoor event from 8:00am to noon and was hoping for dry weather. Thanks!

Posted by: snowlover | July 31, 2010 12:02 PM | Report abuse

The most recent runs of the models don't really show very much rain around here tomorrow, though a good bit more just west. I'd think morning could be tricky, but whatever is falling doesnt look to be very heavy or terribly widespread at any given time.

Posted by: Ian-CapitalWeatherGang | July 31, 2010 12:25 PM | Report abuse

snowlover, shed. the event in my yard & u will safe, the Sptsy Dome remains in place. 56 of last 58 dry. Looks dry here 4 at least another week.

Posted by: VaTechBob | July 31, 2010 12:46 PM | Report abuse


The annual Cicadas of summer are nicknamed Dogday harvestflies because they come out in the Dog days of summer. Around here they usually emerge sometime during the first week of July. The last week of June could be considered early but I would not say way early. They are also not locusts. They are related to treehoppers and planthoppers. If you listen closely you can identify 3 or 4 different species by the uniqueness of their calls.
I hope for lots of rain tomorrow to get my garden nice and soaked. The fresh produce has been good so far this year even with the low amounts of rain.

Posted by: pjdunn1 | July 31, 2010 1:46 PM | Report abuse

DCA hit 86 somewhere in the last 6 hrs, so if we stay above 71 we tie #1 July.

Posted by: Ian-CapitalWeatherGang | July 31, 2010 2:12 PM | Report abuse

GFS at 168 hr./7 days shows a hurricane forming N of Hispaniola.

My first reported dog day cicadas were as early as mid-June this summer. The life cycle underground is two to six years, but a brood lays eggs each year so they appear annually. Several species per brood mirrors the pattern observed in the periodical cicadas, where the big brood contains four species of the genus Magicicada. The next periodical big broods here are due in May of 2017 and 2021. The 2021 brood consists of the descendents of the big brood of 2004. The dog-day cicadas belong chiefly to the genus Tibicen.

Cicadas aren't the only insects coming out now. The crickets and katydids are really beginning to start maturing now. Already the Japanese burrowing crickets and the black field crickets are beginning to chirp. As of today I have two mature male Japanese burrowing crickets [Velofictorus micado]. These crickets are technically "invasive"; they came to this country as eggs packed in the root-balls of plants [such as cherry trees!] imported from Japan, but they don't seem to be displacing the native crickets. My suspicion is that the local V. micado population explosion arrived with the Bradford/Callery pear importations rather than the flowering cherry imports. Wild Callery pears are a TRULY invasive species around here as they seem to be taking over abandoned old-field habitats like crazy. Other Asian imports we don't need include the ubiquitous porcelainberry vines, which seem to be pollinated by the local honeybees. Wild honeybees are themselves an invasive species, but the most damaging invasive species is perhaps Felis silvestris catus, the feral house cat which preys on birds to a greater extent than on rodents.

To me, the most annoying "species" here is the "Landscaperus persistens", or housing-project landscaper. The annoying drone of those lawnmowers and weed-whackers drowns out even the cicadas and crickets. And it happens EVERY SINGLE DAY in my neighborhood, even sometimes on weekends and holidays.

Posted by: Bombo47jea | July 31, 2010 2:35 PM | Report abuse

Thanks Bombo. The repetitive loud buzzing started around 7:00AM this morning in just about every tree on the block. During the hottest part of the day it wasn't nearly as noisy.
Perhaps they all found love & flew away.

Posted by: FIREDRAGON47 | July 31, 2010 6:45 PM | Report abuse

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