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Posted at 9:20 AM ET, 07/ 8/2010

Forecast: Somewhat cooler through weekend

By David Streit

T'storms may finally return Fri. night/Sat.

* Heat Advisory for District | Snow flashback | Weather Wall | NatCast *
* Stay cool with a CWG Snowmageddon t-shirt: Check it out *
* Tropical Depression 2 forms in Gulf: Hurricane Tracking Center *

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


This is a mercy rating, just because it isn't quite as hot. Humidity is still uncomfortable.
Get the 'Digit' on Twitter


Today: Partly sunny, humid. 93-97. | Tonight: Extremely isolated thundershower possible. Muggy. 69-74. | Tomorrow: Partly cloudy, isolated late day thundershower. 90-94. | A Look Ahead | Get Express Forecast by E-mail


By David Streit, CWG Meteorologist

It is painful to say that 90s are an improvement but here we are! The cooling is actually courtesy of an offshore low drifting closer to the coast and pushing in some maritime air. Finally, by Friday night a more traditional cooling source arrives as a cold front should set off a good round of thundershowers for the first time in over 10 days. Saturday should be the coolest with more shower/storm chances and most areas not even breaking 90.

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 (Thursday): The morning is likely to start off with a record high low of 80 degrees downtown to go with yesterday's record high. Temperatures are slower to climb, however, thanks to more pop up clouds by midday. But we still top out in the mid-to-upper 90s. Humidity is on the high side as maritime air sneaks in on light winds from the east. Confidence: High

Tonight: This evening is still muggy with upper 80s to lower 90s. There is a very slight chance for an isolated thundershower but just about a 1-in-10 chance. Lows reach the upper 60s to lower 70s. Confidence: Medium-High

Keep reading for the forecast through Monday....

Tomorrow (Friday): The squeeze play is on as the low off the coast continues to drift inland and a cold front approaches from the west. Neither is enough to keep temperatures from rising to the low-to-mid 90s under partly sunny skies. Humidity clings to the area with light winds from the south, our only solace. A late afternoon thundershower is possible (20% chance). Confidence: Medium-High

Tomorrow Night: Clouds increase and so does the chance for thundershowers as the cold front approaches. It still looks like most showers come late at night (50-60% chance), so evening activities are likely to occur without a hitch. Evening readings in the 80s fall to the low-to-mid 70s overnight. Confidence: Medium


On Saturday, clouds rule the morning into midday with a strong chance of showers and thunderstorms (60-70%) which have the potential to produce significant rains of half an inch to an inch. Severe activity is unlikely due to the timing of the storms. The sun could make an appearance by mid-afternoon and temperatures zip up to the mid-to-upper 80s. The evening is a winner with drier air coming in on breezes from the northwest under clear skies. Temperatures in the upper 70s to lower 80s should be comfortable. Confidence: Medium

Sunday starts out in the mid-60s in the suburbs to lower 70s downtown. Mostly sunny skies foster a faster rise in temperatures and highs will be back in the low-to-mid 90s. Only moderate humidity, light breezes and no thundershower threat still make this day a winner by comparison with recent days. Confidence: Medium-High

Monday morning lows are all over the place from the lower 60s in outlying areas to near 70 downtown. Once again, plenty of sunshine shepherds temperatures up quickly with highs still hitting the low-to-mid 90s. Humidity remains bearable with nearly calm winds. Another day with minimal thundershowers is a plus for outdoor activities but a negative for thirsty vegetation. Confidence: Medium-High

By David Streit  | July 8, 2010; 9:20 AM ET
Categories:  Forecasts  
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Next: Tuesday: 100 earliest in day & for longest time


Only in the mid 90's today... better grab a jacket before leaving the house.

Posted by: dprats21 | July 8, 2010 7:11 AM | Report abuse

Crap....and I thought we might squeeze out a storm today. Once you get west of Fairfax, it's starting to look like the high desert.

Posted by: rocotten | July 8, 2010 7:43 AM | Report abuse

I'm all for the rain. We need it badly, but I hope it won't spoil Saturday morning's golf game!

Posted by: dick1932 | July 8, 2010 7:47 AM | Report abuse

Only in DC is a forecast for mid-90's and humid referred to as "cooler".

Posted by: matthew_lawlor | July 8, 2010 8:20 AM | Report abuse


With the higher humidity and lower pressure, wouldn't give up all hope for a t'storm today. NAM model has been pretty consistent with a 30% chance late afternoon into evening, though that may be overdoing it.

Posted by: Dan-CapitalWeatherGang | July 8, 2010 8:28 AM | Report abuse

I saw news of a brush fire along I-95 in VA yesterday. It is getting very crunchy out there? Ugh. At least in my world, downtown DC, the low hit 80 last night, versus 84F for a low yesterday morning!

Posted by: Camden-CapitalWeatherGang | July 8, 2010 8:30 AM | Report abuse

Some interesting facts on the LWX discussion today such as "THE MOST NUMBER OF CONSECUTIVE HOURS OF 100F OR BETTER IN WASHINGTON IS 7 HOURS. THIS HAS OCCURRED TWICE...ONCE ON JULY 21 1930 FROM NOON TO 6PM EST...OR 1 TO 7 PM EDT. THE OTHER WAS YESTERDAY [I think they mean the day before yesterday] JULY 6 2010 FROM NOON TO 6 PM EDT."


Hopefully Ian or someone will correct this if they messed up again.

Posted by: eric654 | July 8, 2010 8:37 AM | Report abuse


Thanks for alerting us to that. We're going to feature that info in a short post in a bit.

Posted by: Jason-CapitalWeatherGang | July 8, 2010 9:36 AM | Report abuse

@Camden-- Yep, that was true about the brush fire. Just about 5-10 min up the road from me. It's crunchy out this way for sure.

Yesterday when I picked up southbridgedad from the Horner Rd commuter lot the thermometer on my car read 107(keep in mind I went there directly from work at Belvoir, and when I first got in the car after work it read 106). When we got to the gym in Dale City (Sport and Health- about 10 min from Horner Rd lot), the thermometer read 106.

Granted, my car thermometer may be reading a few degrees too warm, but no matter how you slice it, it's HOT!

Posted by: southbridgemom | July 8, 2010 10:10 AM | Report abuse

Look at the showers riding right down the coastline from New Jersey to Delaware.

Posted by: MKadyman | July 8, 2010 10:22 AM | Report abuse

Is weather getting more extreme? We of corurse remember the huge blizzard. Statistically, that it was a one-two punch is a once in a lifetime probability (probably wont' snow much or wont' be any blizzards at all next winter).

Then now we have the heatwave! Is there some sort of reason that a winter like what we had would be followed by a summer this extreme? And does an extreme summer have any bearing on the following winter?

Posted by: superseiyan | July 8, 2010 10:23 AM | Report abuse

I swear it feels like we are well on our way to 100 again what with the temp being high 80s already.

Also, beyond Saturday, it looks as if we are in for another 10 days or so of 90 degree weather. Is this pattern ever going to break or should we just expect every day to be above 90 with occasional 88 day degree days? And yes - cranky - the heat has gotten to me mainly as I just got my first electric bill and I am one of those people who keep the AC at 78/80.

Posted by: hereandnow1 | July 8, 2010 10:38 AM | Report abuse

At 11 a.m., a trifecta of 89s at DCA, IAD and BWI. Yesterday at the same time?... 95 (DCA), 93 (IAD), 97 (BWI).

Posted by: Dan-CapitalWeatherGang | July 8, 2010 11:41 AM | Report abuse

I'll be surprised if we don't get nearly an inch of rain long as it doesn't start tomorrow evening while I'm trying to get to my dance.

Sunday afternoon I might even be able to hike the W&OD...first full-scale hike since May.

Posted by: Bombo47jea | July 8, 2010 12:23 PM | Report abuse

I'll b surpised if I c a 1/4" of rain over the next 3 days.

Posted by: VaTechBob | July 8, 2010 3:02 PM | Report abuse

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