Forecast: Late Storms to Become the Norm

Becoming more humid

For the next several days, a nearby front will help to spark some scattered late afternoon and evening thunderstorms. Outside of the storms, it will be partly sunny, with temperatures climbing towards 90 each afternoon. In other words, count on pretty typical mid-summer weather.

TODAY (SATURDAY)

Mostly sunny, 30% chance of evening storms. 89-93 With ample sunshine, most locations should rise to near 90 during the afternoon. The humidity will creep up, but just sticky as opposed to sultry. A few storms could develop in the far western suburbs by late in the afternoon.

Thunderstorms become possible area-wide during the evening although many areas may remain dry. Overnight lows will drop to the low 70s in the city and upper 60s in the cooler suburbs.

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

TOMORROW (SUNDAY)

Warm and humid with chance of afternoon/evening storms. 89-93. The humidity increases another notch tomorrow -- inching towards oppressive levels. While the afternoon high will be near 90, it will feel more like the mid 90s. A cold front will move closer to the region late in the day, setting off showers and storms (40% chance).

Showers and thunderstorms remain possible through midnight or so, then it will just be partly cloudy and muggy. Low temperatures should drop down to the mid 70s in the city to near 70 in the suburbs.

A LOOK AHEAD

The front forecast to trigger the storms on Sunday is expected to stick around until at least Monday. Until it passes, the air will remain muggy and afternoon/evening storms stay in the picture. So Monday's forecast is similar to Sunday's: partly sunny with a 30% of late day storms. Confidence: Medium

The front may move away from the region Tuesday, giving us a less humid day with minimal rain chances. But, while likely, it's no done deal the front will clear, so I have to mention a 20% of storms again late Tuesday, with highs 85-90. Confidence: Low-Medium

By Jason Samenow |  July 26, 2008; 5:00 AM ET Forecasts
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Bombocast.

Current: 84F, 30.06, falling, haze, altocumulus translucidus. Past weather, quiet evening, slightly muggy, great dance. [True katydids singing in treetops.]

Forecast: Warm, 88F, 30% chance aft./eve. airmass-trough thunderstorm. Tonight: Muggy, low 72F to 64F outside Beltway. Tomorrow: Warm, 40% chance of PM frontal thunderstorm, PM. High 90F.

Dog Days in progress through Aug. 11.

Posted by: El Bombo | July 26, 2008 11:51 AM
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