National Weather Service:
Heat Advisory 		    

Current Conditions
Washington Dulles International, VA
(as of 6:52 AM EDT)
Partly Cloudy
Temperature: 70°
Wind: 6 mph from the ENE
Dew Point: 64 °F
Pressure: 30.04 in
Humidity: 81%
Visibility: 10.0 miles
Local radar » Loop
Regional radar » Loop
 
Forecast As of 5:00 AM EDT on May 28, 2012
Monday...Partly cloudy in the morning, then mostly cloudy with a chance of a thunderstorm and a chance of rain. Fog early. High of 91F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Monday Night...Mostly cloudy in the evening, then partly cloudy. Low of 70F. Winds from the SSW at 5 to 10 mph.
Tuesday...Overcast with a chance of a thunderstorm and a chance of rain. High of 88F. Winds from the SSW at 10 to 15 mph. Chance of rain 40%.
Tuesday Night...Overcast with a chance of a thunderstorm and a chance of rain. Low of 68F. Winds less than 5 mph. Chance of rain 40%.
Wednesday...Mostly cloudy with a chance of rain in the morning, then partly cloudy. High of 82F. Winds from the West at 5 to 10 mph. Chance of rain 20%.
Wednesday Night...Mostly cloudy in the evening, then clear. Low of 54F. Winds from the NW at 5 to 10 mph.
Thursday...Mostly cloudy. High of 75F. Winds from the NW at 10 to 15 mph. Tropical Storm Beryl: Estimated distance to storm center 324 mi. Max sustained winds 39 mph with stronger gusts possible.
Thursday Night...Overcast. Low of 61F. Winds from the NE at 5 to 10 mph. Tropical Storm Beryl: Estimated distance to storm center 324 mi. Max sustained winds 39 mph with stronger gusts possible.
Friday...Overcast with a chance of rain in the afternoon. High of 75F. Winds from the East at 5 to 10 mph. Chance of rain 40%.
Friday Night...Overcast with a chance of a thunderstorm. Low of 61F. Winds from the SSE at 5 to 15 mph. Chance of rain 50%.
Saturday...Partly cloudy with a chance of a thunderstorm. High of 73F. Breezy. Winds from the South at 10 to 20 mph shifting to the West in the afternoon. Chance of rain 60% with rainfall amounts near 0.3 in. possible.
Saturday Night...Partly cloudy with a chance of rain. Low of 57F. Winds from the West at 5 to 10 mph. Chance of rain 20%.
Sunday...Partly cloudy with a chance of rain. High of 79F. Winds from the West at 5 to 15 mph. Chance of rain 20%.
Sunday Night...Mostly cloudy. Low of 55F. Winds from the WNW at 5 to 10 mph.
Monday...Partly cloudy. High of 79F. Breezy. Winds from the NW at 15 to 20 mph.
Monday Night...Mostly cloudy with a chance of rain. Low of 61F. Winds from the WNW at 5 to 10 mph. Chance of rain 20%.
Tuesday...Mostly cloudy with a chance of rain. High of 82F. Winds less than 5 mph. Chance of rain 20%.
Tuesday Night...Mostly cloudy. Low of 64F. Winds less than 5 mph.
Wednesday...Partly cloudy with a chance of a thunderstorm. High of 86F with a heat index of 100F. Winds less than 5 mph. Chance of rain 30%.
Wednesday Night...Partly cloudy with a chance of a thunderstorm. Low of 66F. Winds less than 5 mph. Chance of rain 30%.
Thursday...Partly cloudy. High of 86F with a heat index of 97F. Winds less than 5 mph.
Thursday Night...Clear. Low of 66F. Winds less than 5 mph.
Marine forecast | Air Pollution

5-day forecast
Mon Tue Wed Thu Fri
Mostly Cloudy Chance of a Thunderstorm Chance of Rain Mostly Cloudy Chance of a Thunderstorm
Mostly Cloudy Chance of T-storms Chance of Rain Mostly Cloudy Chance of T-storms
91° | 70° 89° | 68° 87° | 62° 81° | 63° 77° | 60°

Regional conditions
LocationConditionsTemp..
Dulles Partly Cloudy 70°
Leesburg Clear 66°
Bristow Clear 68°
Gaithersburg Clear 64°
Fort Belvoir Clear 66°
Arlington Scattered Clouds 72°
Riverdale Clear 68°
Midland Clear 69°
Quantico Clear 77°
Frederick data not available

Almanac
Key: T = Trace of precipitation; MM = data not available
May 28, 2012
Normal high:78° Record high:90° (1991)
Normal low:54° Record low:37° (1994)
Sunrise:5:47 AM Moon Rise: 12:53 PM
Sunset:8:26 PM Moon Set: 1:05 AM
Complete weather almanac
Detailed History and Climate

Air pollution
EPA forecast for: Northern Virginia

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CurrentGoodPM2.5
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MonModerate OZONE
MonModerate PM2.5
TueModerate OZONE
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WedGood OZONE
WedGood PM2.5

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Heat Advisory
Issued by the National Weather Service at 4:31 am EDT on May 28, 2012


... Heat advisory remains in effect from noon today to 9 PM EDT
this evening...

* heat index values... in the mid 90s due to temperatures around
90... and dewpoints in the upper 60s and low 70s.

* Impacts... the first stretch of Summer-like heat will peak
today. Since individuals have not yet acclimated to hot
conditions... it is important to take extra precautions to
prevent heat related illnesses. Participants in Memorial Day
activities should be mindful of the heat index... and alter
plans accordingly.

Precautionary/preparedness actions...

A heat advisory means that a period of hot temperatures is
expected. The combination of hot temperatures and high humidity
will combine to create a situation in which heat illnesses are
possible. Drink plenty of fluids... stay in an air-conditioned
room... stay out of the sun... and check in on relatives and
neighbors.

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 9 1 1.





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