Forecast: Heat & Humidity Precede Hanna
Wet, windy & stormy late Friday into Saturday?
Though temperatures today will be similar to yesterday's -- into the mid 90s -- the increase in humidity may well presage Tropical Storm Hanna's effects on the D.C. area beginning late Friday and lasting into Saturday. Friday's short-lived morning sunshine will hold highs below 90, but increasing afternoon clouds will give way to a potentially rainy, windy and stormy period Friday evening through Saturday (especially east of D.C.). Calmer, drier weather appears to return later in the day Sunday.
Sunny and hot. Mid 90s. Due to abundant sunshine we'll again experience afternoon highs today some 10+ degrees above average and into the mid 90s in most spots. You also may notice a modest uptick in humidity -- which will do nothing to lessen the impact of the sultry temperatures.
Tonight will feature partly cloudy skies with overnight lows ranging from the upper 60s to near 70.
Keep reading for the forecast through the beginning of next week.
Increasing clouds. Upper 80s. Though we may experience a fair bit of sunshine during the first part of the day Friday, it is likely that clouds will quickly overspread the area by mid-day; this will keep highs below 90. Scattered showers and thunderstorms, along with breezier conditions, may develop during the late afternoon or early evening.
You may want to stay in Friday night as showers and thunderstorms, along with potentially windy conditions, are a reasonable bet. Lows will be near 70.
Though the exact track of Hanna is yet to be determined, it would be prudent to plan for potentially rainy, windy (20-40+ mph) and stormy weather during much of the day Saturday; the greatest effects will likely be to the east of DC. Thick overcast skies will hold afternoon highs in the 70s. Showers and thunderstorms may linger into the evening -- and perhaps, even overnight -- hours Saturday, with steady temperatures near 70. Confidence: Low-Medium
Mostly cloudy and breezy conditions, along with a stray shower, are probable Sunday morning. Models suggest, however, the possibility that some drier air and sunshine may infiltrate the area by the second half of the day. Conditions will probably remain on the breezy side, with afternoon highs from 80-85, depending on cloud cover. Benign weather is in store for Sunday night, with mostly clear skies and lows in the mid to upper 60s. Confidence: Medium
The outlook for Monday calls for mostly sunny and pleasant weather with temperatures right about where they should be for this time of year -- the low 80s.Confidence: Medium
| September 4, 2008; 5:00 AM ET
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