Tuesday, July 31, 2007

Slight Respite from Humidity, But More Heat Ahead


Hot, a little less humid. The brightness of the sunshine and the sharpness of the shadows are signs that drier air has been gradually filtering into the region. Dewpoints in the immediate metro area were in the low 60s by mid afternoon, although the southern fringes of the region were still at or near 70°. Meanwhile, the extra sun has helped push temperatures to 90° or above at nearly all locations; Dulles and National were both 91° at 4pm. The nearest thunderstorms on radar are scattered between Charlottesville and Richmond and along the Virginia Eastern Shore.

The heat is likely to build through the rest of the week as more humidity returns as well.

Tonight and Tomorrow

Forecast Confidence: High-Very HighHot. Skies will be mainly clear tonight with lows in the low 70s to near 70° downtown and in the mid to upper 60s in the burbs. Tomorrow will be sunny and hot with highs 90-94°.

For the outlook through the rest of the week and into the weekend, scroll on down to Jason's post below.

Tropical Topics

Tropical Depression 3 developed overnight and quickly became Tropical Storm Chantal north of Bermuda this morning. The storm has strengthened to maximum winds of 50 mph as it scoots off to the northeast on its way to brushing by Newfoundland early tomorrow. It is likely to lose its tropical characteristics in the next 24 hours.

The tropical wave now about 520 miles east of the southern Windward Islands was less organized this morning, but it still has the potential to become tropically depressed in the next couple of days.

Cool Guys

This week's episode of the WaPo's Secret Worlds of Summer series profiles the "Faces Behind the Freeze".

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Seasonal Outlook

Latest seasonal forecast: Click here.

Latest 3-month temperature outlook from Climate Prediction Center/NWS/NOAA.