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Posted at 05:00 AM ET, 07/11/2011

Forecast: Stifling start to week, stellar close

Code orange air quality: unhealthy for sensitive groups

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

 
Back to work with bad air, heat, & horrifying humidity. Give me a mulligan.
 
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EXPRESS FORECAST

Today: Hot and humid. Mid-90s. | Tonight: Muggy, slight chance of overnight storm. 70-77. | Tomorrow: Very hot and humid, chance of a storm. Mid-to-upper 90s. | Get Express Forecast by E-mail

FORECAST IN DETAIL

The next two days present the trio of horrible h’s - haze, heat, and humidity. If we can persevere through them, we’ll be handsomely rewarded with very pleasant summer weather by Thursday. What about rain chances? Not great this week. Tuesday and Wednesday offer slight storm chances; otherwise, it’s bone dry.

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 (Monday): Lots of sun today, but, ugh, the humidity. Highs climb into the low and mid-90s, which feel closer to 100 with dewpoints around 70. Winds are light, from the southwest at 5-10 mph. Confidence: High

Tonight: The air is thick and there is little breeze. Sky conditions vary from partly to mostly cloudy, with a thunderstorm possible (20% chance) late at night. Lows are very mild from near 70 in the cooler suburbs to the mid-to-upper 70s downtown. Confidence: Medium-High

Keep reading for the forecast through the weekend...

Tomorrow (Tuesday): It’s very likely to be the hottest day of the week coupled with oppressive humidity levels. A weak boundary moving through early in the day could (20% chance) trigger an isolated storm as could (30% chance) a weak cold front as the day concludes. In between though, it’s super steamy - with highs in the mid-90s, with upper 90s if we get enough sun. Peak heat indices? 99-104. Confidence: Medium-High

Tomorrow night: Can’t rule out (20% chance) an evening thunderstorm; otherwise, it’s partly cloudy and remains mild. Lows range from the upper 60s in the cooler suburbs to mid-70s downtown. Confidence: Medium-High

A LOOK AHEAD

Wednesday is hot, but not oppressively so. Humidity levels drop off a little, and highs climb to a more manageable 90. Late in the day, another cold front moves through, providing a 30% chance of thunderstorms. Overnight Wednesday, noticeably cooler and drier air will start trickling in. Lows will range from near 60 in the cooler suburbs to the upper 60s downtown. Confidence: Medium

Thursday and Friday both should be terrific as Canadian high pressure builds over the region. Under a mix of sun and clouds, highs both days are in the mid-to-upper 80s with relatively low humidity. Overnight lows range from the upper 50s in the coolest suburbs to the mid-to-upper 60s downtown. Confidence: Medium

Humidity makes a bit of a comeback by the weekend, but it shouldn’t compare to the levels that began the week. Highs Saturday are in the upper 80s and, by Sunday, we’ll probably back up to around 90 or even a hair above. I expect plenty of sun Saturday with a mix of clouds and sun Sunday. Overnight lows are seasonable from the mid-60s in the cooler suburbs to the low 70s downtown. Confidence: Medium

By  |  05:00 AM ET, 07/11/2011

Categories:  Forecasts

 
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