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Posted at 8:50 PM ET, 08/21/2010

Forecast: Cooler for Sunday, with some showers?

By Jason Samenow

Showers/t'storms possible Sunday & Monday

* Good fishing weather... for turtles | Forecasting hurricanes (part 1) *
* Outside now? Radar, lightning, temps & more: Weather Wall *
* SkinsCast | Air quality alert: Code orange *

updated at 8:50 p.m.; originally posted at 5 a.m.

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


A little hot & a little humid but rain-free. A great lazy beach/pool day.
Get the 'Digit' on Twitter


Today: Partly sunny, very warm. 89-93. | Tonight: Partly cloudy. Chance of sprinkle/light shower. 66-72. | Tomorrow: More clouds & humidity. Chance of showers/t'shower. Low 80s. | A Look Ahead | Get Express Forecast by E-mail


Yes, we probably tack on another 90+ degree day today but after that I honestly don't see any more in the foreseeable future. The hot pattern is losing its grip. Before some potentially awesome weather arrives for the second half of next week, we'll have to get through an unsettled transition period tomorrow through Monday or Tuesday. Showers and storms are possible in that span but it's all up hill after that...

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): We'll have our share of sunshine today courtesy high pressure to the north. As the high drifts offshore, southerly flow trickles in during the afternoon which may increase some high clouds as well as the humidity (dew points reaching the mid-60s). High temps are around 90, with winds from the east and then south near 10 mph. Confidence: Medium-High

Tonight: Partly cloudy, warm, and humid overnight as southerly flow deepens. Could see a sprinkle or light shower come through. Lows only fall to the low 70s downtown with mid-to-upper 60s in the suburbs. Confidence: Medium-High

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

Taft Bridge near Woodley Park Thursday evening. By CWG photographer Ian Livingston.

Tomorrow (Sunday): The gradual approach of a cold front means increasing clouds and humidity, and a chance of showers and maybe thundershowers. Rain chances are around the 40% through the day. Despite these rain chances, many places may be dry for much of the day as shower coverage is likely to be scattered and sporadic. Cloud cover is variable -- with some sun possible at times. Highs probably reach the low 80s. Confidence: Medium

Tomorrow Night: Showers and thundershowers remain possible (40% chance) in the evening, but the risk should end later at night. Under variably cloudy skies, lows are near 70 downtown with mid-60s in the cooler suburbs. Confidence: Medium


The cold front responsible for Sunday's rain chances hangs around for Monday providing variably cloudy skies and another chance (around 30-40%) of showers and storms -- especially in the afternoon and evening and south of the District. Highs are generally in the low-to-mid 80s with overnight lows near 70. Confidence: Medium

Assuming the front is sufficiently south of the region by Tuesday, we may be able to remove the rain threat from the forecast while noticing a down tick in the humidity. I'm thinking we'll have partly sunny skies, with highs in the mid-80s. That's my bet for now, but stay tuned as confidence is not high as to the exact position of this pesky front. Confidence: Low-Medium

By Jason Samenow  | August 21, 2010; 8:50 PM ET
Categories:  Forecasts  
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With an 8:52 temp of 80 degrees at DCA, we've now had 73 consecutive days of 80-degree-or-higher days. Based on Ian's research earlier this week, this is the new verifiable/accepted record?

DCA cooling degree days surpassed 1,600 yesterday, which I believe is more than the entire annual DCA cooling degree days average.

Which is why some of us are hoping that sometime in the next 3 1/2 months, the SLCB will be reappearing in all its crystalline glory.

Loved those Oct. snowfall-in-the-Blue Ridge mtns spgass1 posted links to, yesterday evening. In 1972, I was in the WV/MD Alleghenies during peak leaf season just after a fluffy overnight snowfall. The leaf colors and white snow were an indescribably beautiful panorama.

Posted by: JerryFloyd1 | August 21, 2010 9:15 AM | Report abuse

There was a cicada lying on our front sidewalk this morning.
Looking into its beady dead red eyes I know that summer is winding down quickly.

Posted by: FIREDRAGON47 | August 21, 2010 9:36 AM | Report abuse

Nice 2 c we get a break from the heat next week, still expecting some more 90's the end of this mon. & early Sept.

Posted by: VaTechBob | August 21, 2010 12:05 PM | Report abuse

@Firedragon47, sounds as if the cicada slurped too much tequila last night.

@VTBob, yup, Acuweather's 14-day outlook includes eight more 90-degree days, including a really ugly stretch in late Aug-early September. Alas, it may be too early for the cicadas to sing sayonora.

Posted by: JerryFloyd1 | August 21, 2010 12:29 PM | Report abuse

I prefer to think that the cicada expired from an excess of love.
85 degrees with hazy sunshine in Centreville.
Hoping for some nice rain for the garden tomorrow. Nice rain, not a gullywasher with 60mph wind gusts.

Posted by: FIREDRAGON47 | August 21, 2010 12:41 PM | Report abuse

I just hope tomorrow's rain holds off until we have a chance to run about at the vintage race day at Old Dominion Dragway. We have friends that drove from 5 states away to attend. It's a good time but, they have bleachers if we need to hide for a bit.

Posted by: tbva | August 21, 2010 12:54 PM | Report abuse

whenever i hear "indescribably beautiful" i think of that scene in "a christmas story" when the dad gets his "major award" - that gaudy/tacky leg lamp. he is so beside himself with pride and joy and he describes the lamp as "indescribably beautiful".

Posted by: walter-in-fallschurch | August 21, 2010 12:57 PM | Report abuse

That cicada should have had green eyes--the red-eyed periodical cicadas aren't due until 2017 and 2021 [Arlington County broods] and they appear in May.

Much-unneeded rain tomorrow could be here by noon or 1 PM, spoiling my W&OD Trail hike plans.

Looks at this point that we'll miss breaking the 1980 67 day record for ninety-degree days. I foresee around 58 to 62 such days, barring a lengthy September heat wave. Ninety is still possible around here through Oct. 11.

Posted by: Bombo47jea | August 21, 2010 3:14 PM | Report abuse

Jerry, it was 71 in 1972 then 84 in 1872. I still don't know the answer on the 1872 data. The dailies don't match with LWX public averages for that period. I may try to inquire...

Posted by: Ian-CapitalWeatherGang | August 21, 2010 3:56 PM | Report abuse

err, 71 in 1971.

Posted by: Ian-CapitalWeatherGang | August 21, 2010 3:58 PM | Report abuse

@Ian, thanks, alas, it's looking like even the figure of 84 consecutive days may be in jeapordy, if the 14-day Acuweather forecast holds up. Anyway,. 73 straight days is nothing to sneeze at (even during ragweed season).

Posted by: JerryFloyd1 | August 21, 2010 4:24 PM | Report abuse

@Walter, sorry you missed snow cover in that Alleghenies when the leaves were at their peak. I think you may also have this natural beauty to be indescribable.

Sadly by the end of the weekend, on Oct. 22, when we were returning from D.C. to Morgantown, WV on October 22, all the leaves in the mountains had fallen.

That was on the same afternoon the Oakland Athletics beat the Reds in the World Series, so the barren forests added to the gloom. (In those days the World Series ended comfortably before Halloween and there were still day games.)

Posted by: JerryFloyd1 | August 21, 2010 4:35 PM | Report abuse

@Bombo, if it was a green-eyed cicada, it may have expired of jealousy.

The upper end (62) of your 90 degree days sounds about right. Have absolutely no desire to make it to 67 days (or more). Wonder how many entries were sent into the "guess the total no. of 90-degree days by Sept. 21" contest? (Maybe the total was posted and I missed it.)

Posted by: JerryFloyd1 | August 21, 2010 4:54 PM | Report abuse

No 90 today, got stuck at 88 all afternoon for DCA.

Posted by: Ian-CapitalWeatherGang | August 21, 2010 5:45 PM | Report abuse

I really hope that 14-day forecast is wrong because I'm taking the week leading up to Labor Day off and I really don't want 100 degree days!

Posted by: -pj- | August 22, 2010 9:37 AM | Report abuse

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Posted by: strade37 | August 22, 2010 9:46 AM | Report abuse

In regard to this observation: "Which is why some of us are hoping that sometime in the next 3 1/2 months, the SLCB will be reappearing in all its crystalline glory."

What is the SLCB?

Posted by: dexxtro | August 28, 2010 12:04 PM | Report abuse

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