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Posted at 05:00 AM ET, 07/10/2011

Forecast: Warm today, hot stuff on the way

Code Orange Air Quality Today

updated at 10:40 a.m.

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

 
Compared to the higher heat & humidity on the way, today's low-90s "warmth" looks pretty good.
 
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EXPRESS FORECAST

Today: Sunny. Low 90s. | Tonight: Mostly clear. 67-74. | Tomorrow: Mostly to partly sunny, humid. 20-30% chance of evening storms. Low-to-mid 90s. | A Look Ahead | Get Express Forecast by E-mail

FORECAST IN DETAIL

Today looks like the final opportunity to get out and about before a couple days of uncomfortably hot and humid conditions move in. It’s plenty warm today but humidity levels aren’t too high before beginning to creep up this evening. Ahead of an approaching cold front, highs are likely to climb well into the 90s both Monday and Tuesday with humidity increasing to full strength. Storm chances return late tomorrow and Tuesday as well.

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): Plenty of sun continues to shine down on us today. With high pressure overhead, we’ll enjoy just a few fair-weather clouds moving through. We stay on the warm side with highs reaching the low 90s. Humidity’s still not too high, even as winds turn to come from the south later in the day. Confidence: High

Tonight: Tranquil is the word I’d use to describe conditions tonight. We have mostly clear skies to enjoy the evening, but with not much of a breeze and dew points climbing, it may turn a bit sticky. Lows range from the upper 60s to low 70s. Confidence: Medium-High

Keep reading for the forecast through midweek...

Tomorrow (Monday): Our work week starts off more humid with plenty of sun through early afternoon and highs potentially to the mid-90s, unless building clouds later in the day arrive early enough to keep highs to the low 90s. The clouds are ahead of an approaching cold front, which could trigger late-afternoon or evening thunderstorms (40% chance). Confidence: Medium (10:40 a.m. update: Looks like storm chance probably holds off until evening or overnight and more like 20-30%)

Tomorrow night: Thunderstorm chances are around 40% 20-30% through the night. Aside from any storms, we have mostly cloudy skies and a sticky overnight. Temperatures probably don’t drop lower than the mid-70s with a very moist air mass in place. Confidence: Medium

A LOOK AHEAD

The front comes through on Tuesday, leaving us with continued afternoon/evening storm chances (40%). Before that though, we may be in for quite an uncomfortable day, with partly sunny skies, plenty of humidity, and highs at least in the low-to-mid 90s if not higher. Confidence: Low-Medium

By Wednesday, the front has passed and we get some nice relief from the humidity, as high pressure to the northwest sends a nice breeze from the northwest our way. With clearing skies, highs are right around the mid-July average - near 90. Confidence: Medium

By  |  05:00 AM ET, 07/10/2011

Categories:  Forecasts

 
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