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Posted at 5:00 AM ET, 07/27/2009

Forecast: Humidity, Storm Chances Hang On

By Matt Rogers

Warm week with rain chances varying from day to day

* Moon & Weather | NASA Tweetup | Later: Saturday Storm Photos*


Today: Partly to mostly cloudy. Passing morning shower? 40% chance of p.m. storms. Upper 80s to near 90. Tonight: Partly cloudy. Early-evening shower/storm? 68-72. | Tomorrow: Mostly cloudy with a 30% chance of showers/storms. Near 90. | A Look Ahead


Washington was awash in higher humidity levels over the weekend and little will be changing this week. Variable sky conditions, high humidity and intermittent shower and storm chances will continue to be the dominant theme. Highs mainly in the upper 80s to low 90s should be warmer than what we've seen for the bulk of the summer so far, but certainly not extreme for this time of year.

Today (Monday): After the chance of a passing shower or two during the morning hours, highs should manage to reach the humid upper 80s to near 90, even with partly to mostly cloudy skies. Just like Saturday and Sunday, we stand another chance of showers and strong thunderstorms this afternoon into early evening. The chance of you seeing a storm is about 40%. Confidence: Medium

Probability: 40%
Coverage: Scattered

Tonight: Maybe an early-evening shower or storm. Partly cloudy skies and humidity will keep the "stick" around with muggy conditions and lows close to 70. Look for light breezes from the warm south at about 5-10 mph. Confidence: Medium

Keep reading for the forecast through the weekend...

Tomorrow (Tuesday): Our stagnant pattern remains, although there may be a bit more sun than today. That could allow a few more spots to sneak up into the low 90s for highs (otherwise upper 80s to near 90). Chance of afternoon showers and thunderstorms runs about 30% for tomorrow. Confidence: Medium

Tomorrow Night: We may have to continue a chance of showers and storms (around 30%) into the evening. Partly cloudy skies and mugginess stay in place with lows in the low-to-mid 70s in the city, around 70 in the suburbs. Confidence: Medium


Wednesday through Friday remain a broken record of repeat forecasts with the D.C. area stuck between warm high pressure to the east and cool low pressure to the west. The result? Highs in the upper 80s to around 90 each day along with a 40% chance of showers and thunderstorms, mostly in the afternoons and evenings. Winds should still come from the south and southwest. Lows should range from the upper 60s to low 70s. Confidence: Medium

The weekend is not offering much change as of now. The stickiness sticks around with periods of sun and clouds, highs in the upper 80s to near 90, lows in the upper 60s to low 70s, and a running 30% chance of showers and thunderstorms. Confidence: Low-Medium

This same pattern looks to persist into the first week of August as well; the humidity has unpacked its bags and wants to stay for a while.

By Matt Rogers  | July 27, 2009; 5:00 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: Storms Mostly Miss; More Chances This Week
Next: Saturday Evening Thunderstorms in Washington


As I predicted, Saturday night's severe weather did not "rerun" in my area yesterday afternoon/evening, though other areas got a few storms. Instability may recharge this afternoon--I still have both a busy dance week and an "essential" Library errand this PM. I don't get my Tuesday nights free for a month until August.

Otherwise, wet weather on Wednesday MORNING would not be appreciated.

Posted by: Bombo47jea | July 27, 2009 11:29 AM | Report abuse

Anybody else watch "The Storm" on NBC last night? I can't get enough of that stuff.

Posted by: Brian-CapitalWeatherGang | July 27, 2009 3:11 PM | Report abuse

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