wpostServer: http://css.washingtonpost.com/wpost

The Post Most: Local

Posted at 05:00 AM ET, 05/28/2012

Forecast: Muggy Memorial Day, drier air moves in mid-week

* Heat advisory noon to 9 p.m. (except counties near Bay, map) *

EXPRESS FORECAST

Today: Partly sunny, humid. 20% chance of PM storms. 88-92. | Tonight: Partly cloudy and warm. 66-72. | Tomorrow: Hot, humid, 40% chance of PM storms. 90-95. | Get Express Forecast by E-mail

TODAY'S DAILY DIGIT

A somewhat subjective rating of the day’s weather, on a scale of 0 to 10


Hot and humid, but fitting for unofficial start of summer. Smaller storm chances. Get the Digit on Twitter| Discuss on Facebook

FORECAST IN DETAIL


It’s the unofficial start of summer today and while it’s customarily hot and humid, there are several things to be thankful for: 1) Lower storm chances today compared to Sunday. 2) No air quality alerts. 3) We made it this far without hitting 90. But, alas...90 or so is a good possibility today and especially Tuesday before cooler, drier air arrives by Thursday. Thunderstorm chances increase during the transition (late Tuesday into Wednesday), and may return by Friday/the weekend.

Today (Monday): After last night’s storms, there may be patchy fog for the early risers. Then, we heat up. Most spots make it into the upper 80s or low 90s during the afternoon with plenty of humidity (dew points 67-70). No front is around to trigger storms, but a few may pop up (20% chance) with the sticky airmass - so keep an eye to the sky during your late day barbeques. Winds are from the south at 5-10 mph. Confidence: Medium-High


Tonight: A 20% chance of evening storms then just a warm, muggy night. Lows are in mid-60s in the cooler suburbs to the low 70s downtown. Confidence: Medium-High

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend...

Tomorrow (Tuesday): The hottest day of the year so far. Heat bubbles up the East Coast, but the good news is that it won’t last long. A cold front arrives on the scene setting off scattered showers and storms in the afternoon (40% chance). Before storms barge into the region, highs reach 90-95. Winds from the south increase at 10-15 mph. Confidence: Mediium-High

Tomorrow night: Showers and storms are a decent bet (50-60% chance) as the cold front slowly moves through the areas. Lows range from 65-70. Confidence: Medium-High

A LOOK AHEAD

Areas along and east of I-95 could see a linger shower Wednesday morning, otherwise, it becomes partly to mostly sunny and warm, with highs 85-90. The noticeably cooler and drier air waits one more day. Note, tropical storm Beryl, while increasing surf at the beaches, will pass to our east. Wednesday night is fantastic, as less humid air filters in, skies clear, and temperatures drop back into the upper 50s in the cooler suburbs to mid-60s downtown. Confidence: Medium

Thursday is the pick of the week. Skies are sunny, humidity is low, and highs max out in the low 80s. Clouds may increase late Thursday night, with lows 56-64 (suburbs-city). Confidence: Medium

Variably cloudy Friday as a warm front lifts north through the region - it may set off some showers ands storms, but hard to pin down the timing right now (PM is favored). Highs are seasonable, in the upper 70s to near 80. Mild and a bit more humid Friday night with a chance of showers and storms, with lows in the 60s. Confidence: Low-Medium

Some time between late Friday night and late Saturday, a cold front will push through the region; its timing plays a big role in the weekend forecast. By no means are we looking at a washout, but said front could bring a round of showers/storms - perhaps Saturday afternoon. By Sunday, the front probably clears, so shower chances are much lower. Highs Saturday should be near 80, and perhaps only the mid-upper 70s Sunday. Partly cloudy Saturday night with lows 57-64 (suburbs-city). Confidence: Low-Medium

By  |  05:00 AM ET, 05/28/2012

Categories:  Forecasts

 
Read what others are saying
     

    © 2011 The Washington Post Company