Gainesville, VA (20155)

10:05 PM EDT on September 27, 2016 (GMT -0400)
Lake Manassas | | Change Station
Active Advisory: Flash Flood Watch

Elev 361 ft 38.78 °N, 77.64 °W | Updated 0 second ago

Clear
Clear
62.4 °F
Feels Like 62.4 °F
N
0.0
Wind Variable Wind from SSW
Gusts 0.0 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.94 in
Visibility 10.0 miles
Clouds Clear
Dew Point 59 °F
Humidity 89%
Rainfall 0.23 in
Snow Depth Not available.
7:03 AM 6:58 PM
Waning Crescent, 8% visible
METAR KHEF 280155Z 00000KT 10SM CLR 16/16 A2994 RMK AO1
Pressure 29.94 in
Visibility 10.0 miles
Clouds Clear
Dew Point 59 °F
Humidity 89%
Rainfall 0.23 in
Snow Depth Not available.
7:03 AM 6:58 PM
Waning Crescent, 8% visible
METAR KHEF 280155Z 00000KT 10SM CLR 16/16 A2994 RMK AO1

10-Day Weather Forecast

Almanac

Astronomy

Sep. 27, 2016 Rise Set
Actual Time
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Nautical Twilight
Astronomical Twilight
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, % of the Moon is Illuminated

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City Distance Mag. Time & Date
Minimum magnitude displayed is 2.5.

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Station Location Temp. Windchill Dew Point Humidity Wind Precip. Elev Updated Type
                   

Watches & Warnings

Flash Flood Watch
Issued: 5:30 PM EDT Sep. 27, 2016 – National Weather Service

... Flash Flood Watch in effect from late Wednesday night through
Friday morning...

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Watch for portions of Maryland... the District of
Columbia... Virginia and West Virginia... including the
following areas... in Maryland... Anne Arundel... Calvert...
Carroll... central and eastern Allegany... central and southeast
Howard... central and southeast Montgomery... Charles...
Frederick MD... northern Baltimore... northwest Harford...
northwest Howard... northwest Montgomery... Prince Georges...
southeast Harford... southern Baltimore... St. Marys and
Washington. The District of Columbia. In Virginia...
Arlington/Falls Church/Alexandria... Clarke... Culpeper...
eastern Loudoun... Fairfax... Frederick VA... Greene... King
George... Madison... northern Fauquier... northern Virginia Blue
Ridge... Orange... Page... Prince William/Manassas/Manassas
Park... Rappahannock... Shenandoah... southern Fauquier...
Spotsylvania... Stafford... Warren and western Loudoun. In West
Virginia... Berkeley... eastern Mineral... Hampshire... Hardy...
Jefferson and Morgan.

* From late Wednesday night into Friday morning

* an upper level low pressure over the western Great Lakes will
drop southward into the Ohio Valley Wednesday into Thursday. As
the upper low drops southward... low level flow is forecast to
rapidly increase over the area Wednesday night resulting in
significant moisture transport into the area. Periods of heavy
rainfall are anticipated late Wednesday night through Thursday
night across the central mid-Atlantic. The period of most
intense rainfall is expected late Wednesday night through early
Thursday afternoon. Widespread rainfall amounts of 3 to 5 inches
are expected with localized higher totals in areas of repeated
activity. Eastern slopes of mountains such as the northern Blue
Ridge and Catoctin Mountain also have an increased risk for
higher rain totals.

* Potential exists for flash flooding of small streams... creeks
and urban areas especially in areas of repeated activity.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.