Rockville, Maryland

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Local Time: 12:44 AM EST (GMT -05) — Set My Timezone

Lat/Lon: 39.1° N 77.2° W (Google Map)

Tropical Weather: Super Typhoon Nida (Western Pacific) Tropical Cyclone Bongani (South Indian Ocean)

Active Advisory: Dense Fog Advisory (US Severe Weather)

	Current Conditions

Woodley Gardens, Rockville, Maryland (PWS)

Updated: 12:40 AM EST on November 26, 2009

44.1 °F

Overcast

Windchill:	44 °F
Humidity:	94%
Dew Point:	42 °F
Wind:	Calm
Wind Gust:	0.0 mph
Pressure:	29.85 in (Falling)
Visibility:	0.2 miles
UV:	0 out of 16
Clouds:	Overcast 100 ft (Above Ground Level)
Elevation:	451 ft

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City:		Temp.:	Conditions:	Updated:
	Gaithersburg	43 °F	Overcast	12:35 AM EST
	College Park	45 °F	Overcast	12:45 AM EST
	Washington	48 °F	Mostly Cloudy	12:06 AM EST
	Dulles Airport	41 °F	Patches Fog Mist	12:36 AM EST

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Rockville, MD

44.1 °F

Overcast

at 12:40 AM EST

(Click for forecast)

5-Day Forecast for ZIP Code 20847

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Thursday	Friday	Saturday	Sunday	Monday
56° F \| 38° F	45° F \| 34° F	50° F \| 34° F	56° F \| 38° F	52° F \| 38° F
Mostly Cloudy	Chance of Rain 30% chance of precipitation	Partly Cloudy	Partly Cloudy	Chance of Rain 20% chance of precipitation
Hourly	Hourly	Hourly	Hourly	Hourly
Today is forecast to be nearly the same temperature as yesterday.

Nowcast as of 10:18 PM EST on November 25, 2009

Now

dense fog advisory in effect until 9 am EST Thursday... Dense fog will persist this evening as a saturated airmass continues to cool. Visibilities below one-quarter mile will be common for many areas along and east of the Blue Ridge...and in the Shenandoah Valley. Fog is expected to continue through tonight as the saturated airmass will remain in place.

Forecast for Montgomery

Air quality Forecast for Washington

	Air quality:	AQ Index:	Pollutant:
Yesterday	Good		PM2.5
Yesterday	Good		OZONE
Current	Good		PM2.5
Current	Good		OZONE
Thursday	Good		PM2.5
Friday	Good		PM2.5
Saturday	Good		PM2.5
Sunday	Good		PM2.5
Monday	Good		PM2.5
Want to learn more about air pollution? Visit our health section.

Current Air Quality Yesterday's Peak

Earthquake Activity

City:	Distance to Epicenter:	Magnitude:	Date:
Appomattox, VA	144 miles	2.7	5:24 PM EST 2009-11-25
Minimum magnitude displayed is 2.5. For more information, visit USGS.

MSN Map of Earthquakes

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Blogs in This Area

City:	Member:	Title:	Last Activity:
Silver Spring	Aloysius	Aloysius's Wunder Blog	3 hours ago
Blogs for people who love weather and the outdoors! View All Blogs »

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Weather Stations

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Warnings and Notices

	Dense Fog Advisory
Statement as of 10:17 PM EST on November 25, 2009 ... Dense fog advisory remains in effect until 9 am EST Thursday... A dense fog advisory remains in effect until 9 am EST Thursday for locations east of the Blue Ridge... and the Shenandoah Valley. Calm winds... mostly clear skies... and abundant surface moisture have combined to produce areas of dense fog across the region late this evening. Overnight... this fog will continue to become more widespread... with a prolonged period of dense fog expected across much of Maryland... northern Virginia... and the eastern West Virginia Panhandle. After sunrise... the fog should begin to diminish. Precautionary/preparedness actions... A dense fog advisory means visibilities will frequently be reduced to less than one quarter mile. If driving... slow down... use your headlights... and leave plenty of distance ahead of you. Sbk