Dulles, VA (20189)

5:37 PM EDT on July 25, 2016 (GMT -0400)
Sterling Park | | Change Station

Elev 348 ft 38.99 °N, 77.41 °W | Updated 15 seconds ago

Mostly Cloudy
Mostly Cloudy
94.8 °F
Feels Like 99 °F
N
1.8
Wind Variable Wind from SW
Gusts 2.5 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.84 in
Visibility 10.0 miles
Clouds Scattered Clouds 6000 ft
Scattered Clouds 14000 ft
Mostly Cloudy 25000 ft
Heat Index 99 °F
Dew Point 68 °F
Humidity 41%
Rainfall 0.00 in
Snow Depth Not available.
6:04 AM 8:27 PM
Waning Gibbous, 62% visible
METAR KIAD 252052Z 21011KT 10SM SCT060CB SCT140 BKN250 37/20 A2985 RMK AO2 SLP103 CB NW MOV E CB DSNT W VCSH NW T03720200 56022
Pressure 29.84 in
Visibility 10.0 miles
Clouds Scattered Clouds 6000 ft
Scattered Clouds 14000 ft
Mostly Cloudy 25000 ft
Heat Index 99 °F
Dew Point 68 °F
Humidity 41%
Rainfall 0.00 in
Snow Depth Not available.
6:04 AM 8:27 PM
Waning Gibbous, 62% visible
METAR KIAD 252052Z 21011KT 10SM SCT060CB SCT140 BKN250 37/20 A2985 RMK AO2 SLP103 CB NW MOV E CB DSNT W VCSH NW T03720200 56022
Record highs are possible for parts of the Northeast Monday and Tuesday, as parts of the central U.S. take a little breather from the worst of summer's dog day heat.

Expansive high pressure in the upper atmosphere will focus on parts of the East and West this week, sending heat indices well into the triple digits from the Mid-Atlantic states into the South.

10-Day Weather Forecast

Almanac

Astronomy

Jul. 25, 2016 Rise Set
Actual Time
Civil Twilight
Nautical Twilight
Astronomical Twilight
Moon
Length of Visible Light
Length of Day
Tomorrow will be .
, % of the Moon is Illuminated

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  Air Quality AQ Index Pollutant
Not available.

Snow Depth

Station Depth Elevation

Earthquake Activity

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

Coastal Water Temperatures

Place Temperature

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Nearby Weather Stations

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

Watches & Warnings

Severe Thunderstorm Warning
Issued: 5:16 PM EDT Jul. 25, 2016 – National Weather Service

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
southwestern Montgomery County in central Maryland...
northwestern Fairfax County in northern Virginia...
northwestern Prince William County in northern Virginia...
southeastern Loudoun County in northern Virginia...
northeastern Fauquier County in northern Virginia...

* until 600 PM EDT

* at 515 PM EDT... a severe thunderstorm was located near
Middleburg... or 12 miles west of Leesburg... moving east at 30 mph.

Hazard... 70 mph wind gusts and quarter size hail.

Source... radar indicated.

Impact... damaging winds will cause some trees and large branches
           to fall. This could injure those outdoors... as well as
           damage homes and vehicles. Roadways may become blocked by
           downed trees. Localized power outages are possible.
           Unsecured light objects may become projectiles.

* Locations impacted include...
Centreville... Rockville... Reston... Leesburg... South Riding...
Herndon... Broadlands... Lansdowne... Lowes Island... Brambleton...
Dulles international Airport... Potomac... Ashburn... Oakton...
Sterling... North Potomac... Chantilly... Wolf Trap... Great Falls and
Countryside.

Precautionary/preparedness actions...

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds... so if you are near large
trees... move to an interior room on the lowest floor. Don't drive
underneath trees or in wooded areas until the threat has passed.


Lat... Lon 3908 7718 3879 7741 3891 7774 3915 7756
time... Mot... loc 2115z 283deg 28kt 3904 7777

Hail... 1.00in
wind... 70mph


Dh


Severe Thunderstorm Watch
Issued: 5:24 PM EDT Jul. 25, 2016 – National Weather Service

Severe Thunderstorm Watch 416 remains in effect until 1000 PM EDT

VA
. Virginia counties included are

Arlington Clarke Culpeper
Fairfax Fauquier Frederick
Loudoun Madison Page
Prince William Rappahannock Rockingham
Shenandoah Stafford Warren




Virginia independent cities included are

Alexandria Fairfax Falls church
Fredericksburg Harrisonburg Manassas
Manassas Park Winchester




Heat Advisory
Issued: 3:38 PM EDT Jul. 25, 2016 – National Weather Service

... Heat advisory remains in effect until 8 PM EDT this evening...

* heat index values... up to 110 this afternoon due to
temperatures in the mid 90s to around 100... and dewpoints in the
70s.

* Impacts... risk of heat-related illness for those without air-
conditioning or those outdoors for an extended period.

Precautionary/preparedness actions...

A heat advisory means that a period of high temperatures is
expected. The combination of high temperatures and high humidity
will create a situation in which heat illnesses are possible.

Take extra precautions if you work or spend time outside. When
possible... reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work... the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency - call 911.