Potomac, MD

8:29 AM EDT on May 27, 2012 (GMT -0400)
Elev: 269 ft
Lon: 77.2° W
Lat: 39.0° N
Source
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Active Advisory: Air Quality Alert (US Severe Weather)
Tropical Weather: Subtropical Storm Beryl (North Atlantic) Tropical Storm Sanvu (Western Pacific)
Weather Summary
Shaun Tanner
Weather Underground Forecast for Sunday, May 27, 2012. More interesting weather for many parts of the country is expected Sunday. Subtropical Storm Beryl will continue on its path toward the northeast coast of Florida near Georgia. It is expected to make landfall with tropical storm strength winds either late Sunday night or early Monday morning. This storm will not be a signficant wind threat, and the rain associated with it will mostly be a blessing to this region as it has suffered through an exceptional drought.

Elsewhere, an intense heat wave will continue for the Plains and Southeast while also spreading northward into the Ohio Valley and Upper Midwest. Maximum temperature records are most likely to be broken for many areas as temperatures will soar into the 90s and 100s. Even more dangerous will be the heat index values over 100 degrees. The heat index tells you how hot the air feels. The more humid the weather, the higher the heat index will soar. Thankfully, many areas will not experience the extremely high humidity common during the Summer months.

In the West, a strong storm will move through the Northern Rockies and into the Dakotas. This storm will bring widespread rain and even some snow from Idaho through Minnesota. The associated cold front will move through the Plains, possibly instigating some strong thunderstorms that could become severe.

The Northeast will rise into the 70s and 80s, while the Southeast and Southern Plains will see temperatures in the 90s and 100s. The Northwest will rise into the 70s.
Weather Underground Forecast for Sunday, May 27, 2012. More interesting weather for many parts of the country is expected Sunday. Subtropical Storm Beryl will continue on its path toward the northeast coast of Florida near Georgia. It is expected to make landfall with tropical storm strength winds either late Sunday night or early Monday morning. This storm will not be a signficant wind threat, and the rain associated with it will mostly be a blessing to this region as it has suffered through an exceptional drought.

Elsewhere, an intense heat wave will continue for the Plains and Southeast while also spreading northward into the Ohio Valley and Upper Midwest. Maximum temperature records are most likely to be broken for many areas as temperatures will soar into the 90s and 100s. Even more dangerous will be the heat index values over 100 degrees. The heat index tells you how hot the air feels. The more humid the weather, the higher the heat index will soar. Thankfully, many areas will not experience the extremely high humidity common during the Summer months.

In the West, a strong storm will move through the Northern Rockies and into the Dakotas. This storm will bring widespread rain and even some snow from Idaho through Minnesota. The associated cold front will move through the Plains, possibly instigating some strong thunderstorms that could become severe.

The Northeast will rise into the 70s and 80s, while the Southeast and Southern Plains will see temperatures in the 90s and 100s. The Northwest will rise into the 70s.
Weather Underground Broadcast Network

Potomac Weather at a Glance

Updated 8:15 AM EDT
Weather Station
Leesburg (KJYO)
Elevation
387 ft
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Now
Clear
Clear
Temperature
70 °F
Feels Like 70 °F
Wind(mph)
7
Sunrise / Set
5:47 AM
8:25 PM
Moon
Waxing Crescent
Today
Partly Cloudy 88 °F
Partly Cloudy
Tonight
Partly Cloudy 68 °F
Partly Cloudy
Tomorrow
Chance of a Thunderstorm 90 | 68 °F
Chance of T-storms
20% chance of precipitation
Tuesday
Chance of a Thunderstorm 90 | 68 °F
Chance of T-storms
30% chance of precipitation
Wednesday
Fog 86 | 57 °F
Fog
Thursday
Partly Cloudy 79 | 59 °F
Partly Cloudy
Tropical Storm Beryl
Today is forecast to be nearly the same temperature as yesterday.
Conditions
Pressure
30.16 in
Visibility
10.0 miles
Clouds
Clear -
Moisture
Humidity
94%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KJYO 271215Z AUTO 18006KT 10SM CLR 21/20 A3016 RMK AO2
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Temperature
70 °F
Dew Point
68 °F
Wind
Speed / Dir
7 mph from South
Wind Gust
Health
UV
2 out of 16
Pollen
7.70 out of 12
Pollen Forecast
Air Quality
Not available.
Flu Activity
Sporadic
View Flu Map
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Source: BestForecast
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 88F. Winds from the South at 5 to 15 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening, then mostly cloudy. Low of 68F. Winds from the South at 5 to 10 mph.
Monday
chancetstorms Mostly cloudy in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 68F. Winds less than 5 mph. Chance of rain 20%.
Tuesday
chancetstorms Overcast with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.
Tuesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm and rain. Fog overnight. Low of 68F. Winds from the WSW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.4 in. possible.
Wednesday
mostlycloudy Overcast. Fog early. High of 86F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_mostlycloudy Overcast. Low of 57F. Winds from the NW at 5 to 15 mph.
Thursday
partlycloudy Overcast in the morning, then mostly cloudy. High of 79F. Winds from the NW at 5 to 15 mph. Tropical Storm Beryl: Estimated distance to storm center 313 mi. Max sustained winds 39 mph with stronger gusts possible.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 59F. Winds less than 5 mph. Tropical Storm Beryl: Estimated distance to storm center 313 mi. Max sustained winds 39 mph with stronger gusts possible.
Friday
chancerain Mostly cloudy with a chance of rain. High of 73F. Winds from the SE at 5 to 15 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.
Friday Night
nt_tstorms Overcast with thunderstorms. Low of 61F. Winds from the SSW at 5 to 10 mph shifting to the WNW after midnight. Chance of rain 80% with rainfall amounts near 1.2 in. possible.
Saturday
partlycloudy Partly cloudy. High of 79F. Breezy. Winds from the WNW at 10 to 20 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 52F. Winds from the NW at 10 to 15 mph.
Sunday
partlycloudy Partly cloudy. High of 77F. Breezy. Winds from the WNW at 15 to 20 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 59F. Winds from the West at 5 to 10 mph.
Monday
partlycloudy Partly cloudy. High of 77F. Winds from the WNW at 5 to 10 mph.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 59F. Winds less than 5 mph. Chance of rain 20%.
Tuesday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 82F with a heat index of 90F. Winds less than 5 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 40%.
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 84F with a heat index of 100F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 20%.
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Forecast

View Calendar 10-Day Forecast for station KJYO

Sunday, 27
Partly Cloudy
88 | 68 °F
Partly Cloudy
Chance of
Precipitation
10%
Monday, 28
Chance of a Thunderstorm
90 | 68 °F
Chance of T-storms
Chance of
Precipitation
20%
Tuesday, 29
Chance of a Thunderstorm
90 | 68 °F
Chance of T-storms
Chance of
Precipitation
30%
Wednesday, 30
Fog
86 | 57 °F
Fog
Chance of
Precipitation
0%
Thursday, 31
Partly Cloudy
79 | 59 °F
Partly Cloudy
Chance of
Precipitation
0%
Friday, 1
Chance of Rain
73 | 61 °F
Chance of Rain
Chance of
Precipitation
60%
Saturday, 2
Partly Cloudy
79 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 3
Partly Cloudy
77 | 59 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 4
Partly Cloudy
77 | 59 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 5
Chance of a Thunderstorm
82 | 63 °F
Chance of T-storms
Chance of
Precipitation
40%
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 88F. Winds from the South at 5 to 15 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening, then mostly cloudy. Low of 68F. Winds from the South at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 69 84 | 69 84 | 67 74 | 70
Wind 4 mph SSE 9 mph SSE 10 mph South 5 mph SSE
Humidity 95% 63% 55% 85%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 42% 10% 67% 45%
Conditions Fog Clear Mostly Cloudy Partly Cloudy
Sunrise & Sunset
5:47 AM
8:25 PM
The quality of the forecasted high temperature for this day is excellent. MaxT RMSE [1.36], Average RMSE [1.28]
The National Weather Service forecast quality is excellent. MaxT RMSE [1.47], Average RMSE [1.27] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Monday
chancetstorms Mostly cloudy in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 68F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 72 | 71 83 | 71 87 | 71 76 | 73
Wind 5 mph South 8 mph SSW 8 mph South 5 mph South
Humidity 94% 66% 61% 92%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 45% 53% 50% 49%
Conditions Partly Cloudy Partly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:46 AM
8:26 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.67], Average RMSE [1.86]
The National Weather Service forecast quality is good. MaxT RMSE [1.65], Average RMSE [1.49] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Tuesday
chancetstorms Overcast with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.
Tuesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm and rain. Fog overnight. Low of 68F. Winds from the WSW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.4 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 73 | 72 84 | 69 86 | 70 72 | 71
Wind 5 mph SSW 9 mph SW 10 mph South 5 mph WSW
Humidity 96% 60% 59% 92%
Chance of Precip. 10% 30% 30% 40%
Cloud Cover 51% 95% 70% 82%
Conditions Partly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:46 AM
8:27 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.82], Average RMSE [2.23]
The National Weather Service forecast quality is good. MaxT RMSE [1.90], Average RMSE [1.83] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Wednesday
mostlycloudy Overcast. Fog early. High of 86F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_mostlycloudy Overcast. Low of 57F. Winds from the NW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 69 | 67 79 | 68 83 | 65 69 | 64
Wind 5 mph WSW 6 mph West 9 mph WNW 9 mph NW
Humidity 97% 75% 55% 84%
Chance of Precip. 10% 10% 0% 0%
Cloud Cover 68% 34% 100% 93%
Conditions Fog Fog Overcast Overcast
Sunrise & Sunset
5:45 AM
8:27 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.97], Average RMSE [2.13]
The National Weather Service forecast quality is good. MaxT RMSE [2.27], Average RMSE [1.78] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Thursday
partlycloudy Overcast in the morning, then mostly cloudy. High of 79F. Winds from the NW at 5 to 15 mph. Tropical Storm Beryl: Estimated distance to storm center 313 mi. Max sustained winds 39 mph with stronger gusts possible.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 59F. Winds less than 5 mph. Tropical Storm Beryl: Estimated distance to storm center 313 mi. Max sustained winds 39 mph with stronger gusts possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 59 | 51 74 | 52 78 | 57 64 | 56
Wind 9 mph NW 10 mph NW 6 mph NW 1 mph NE
Humidity 72% 46% 49% 71%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 100% 40% 75% 57%
Conditions Overcast Partly Cloudy Mostly Cloudy Partly Cloudy
Sunrise & Sunset
5:45 AM
8:28 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.36], Average RMSE [2.39]
The National Weather Service forecast quality is good. MaxT RMSE [2.48], Average RMSE [2.14] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Friday
chancerain Mostly cloudy with a chance of rain. High of 73F. Winds from the SE at 5 to 15 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.
Friday Night
nt_tstorms Overcast with thunderstorms. Low of 61F. Winds from the SSW at 5 to 10 mph shifting to the WNW after midnight. Chance of rain 80% with rainfall amounts near 1.2 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 60 | 57 71 | 65 72 | 72 65 | 64
Wind 4 mph ESE 9 mph SE 12 mph SE 5 mph WSW
Humidity 89% 79% 98% 93%
Chance of Precip. 0% 20% 30% 50%
Cloud Cover 9% 87% 100% 100%
Conditions Clear Chance of Rain Chance of Rain Thunderstorm
Sunrise & Sunset
5:45 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.82], Average RMSE [2.55]
The National Weather Service forecast quality is fair. MaxT RMSE [3.09], Average RMSE [2.77] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 79F. Breezy. Winds from the WNW at 10 to 20 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 52F. Winds from the NW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 64 | 62 73 | 61 74 | 61 63 | 59
Wind 8 mph West 14 mph West 15 mph NW 11 mph NW
Humidity 92% 64% 64% 85%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 100% 89% 78% 65%
Conditions Overcast Overcast Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
5:45 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.73], Average RMSE [2.92]
The National Weather Service forecast quality is fair. MaxT RMSE [2.98], Average RMSE [2.54] : Use NWS
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 77F. Breezy. Winds from the WNW at 15 to 20 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 59F. Winds from the West at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 51 73 | 49 74 | 50 62 | 53
Wind 11 mph WNW 15 mph NW 10 mph WNW 5 mph West
Humidity 82% 42% 42% 70%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 33% 6% 16% 24%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
5:45 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.05], Average RMSE [3.20]
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Monday
partlycloudy Partly cloudy. High of 77F. Winds from the WNW at 5 to 10 mph.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 59F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 62 | 57 72 | 58 76 | 62 62 | 55
Wind 5 mph West 6 mph WNW 5 mph WNW 4 mph WNW
Humidity 82% 59% 62% 79%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 40% 9% 81% 29%
Conditions Partly Cloudy Clear Mostly Cloudy Partly Cloudy
Sunrise & Sunset
5:45 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.28], Average RMSE [3.69]
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Tuesday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 82F with a heat index of 90F. Winds less than 5 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 64 | 60 76 | 72 80 | 75 65 | 62
Wind 4 mph West 3 mph West 3 mph West 2 mph WSW
Humidity 88% 88% 85% 89%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 56% 53% 45% 51%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:45 AM
8:28 PM
Source: BestForecast at 3:24 AM EDT on May 27, 2012
Descriptive Forecast
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 84F with a heat index of 100F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 65 79 | 77 83 | 80 68 | 67
Wind 2 mph WSW 3 mph WSW 3 mph WSW 3 mph WSW
Humidity 95% 96% 94% 94%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 72% 84% 87% %
Conditions Mostly Cloudy Mostly Cloudy Mostly Cloudy Clear
Sunrise & Sunset
5:45 AM
8:28 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 27, 2012 Max Temp Min Temp
Normal (KIAD) 78 °F 53 °F
Record (KIAD) 92 °F (1965) 37 °F (1972)
Yesterday 86 °F 66 °F
Yesterday's Cooling Degree Days: 11
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
More information at USGS.gov
Coastal Water Temperatures
Place Temperature
Washington, DC 77.0 °F
Baltimore, MD 75.9 °F
Solomons Island, MD 73.0 °F
Marine Forecast
Astronomy
May. 27, 2012 Rise Set
Actual Time 5:47 AM EDT 8:25 PM EDT
Civil Twilight 5:16 AM EDT 8:56 PM EDT
Nautical Twilight 4:37 AM EDT 9:35 PM EDT
Astronomical Twilight 3:53 AM EDT 10:19 PM EDT
Moon 11:48 AM EDT 12:32 AM EDT
Length Of Visible Light 15h 40m
Length of Day
14h 38m
Tomorrow will be 1m 16s longer.
Waxing Crescent, 36% of the Moon is Illuminated
Today
Waxing Crescent
May 28
First Quarter
Jun 4
Full
Jun 11
Last Quarter
Jun 19
New
Visit Astronomy
Today's Extremes
State Highs State Lows
77 °F
Maryland Science Center
77 °F
College Park
75 °F
Annapolis Naval Academy
73 °F
Baltimore
73 °F
Salisbury
61 °F
Ocean City
62 °F
Salisbury
62 °F
Fort Meade
64 °F
Cumberland
64 °F
Oakland
Record Extremes
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Travel Planning
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Nearby Events
Event Date Forecast
Flora the Red Menace 2:00 PM EDT 2012-05-27 Partly Cloudy, 82°F
Flora the Red Menace 7:00 PM EDT 2012-05-27 Partly Cloudy, 84°F
Young Soloists Recital 3:00 PM EDT 2012-05-27 Partly Cloudy, 85°F
The Grown & Sexy Throwback Affair!!! 80's, 90's and early 2000's Edition 9:00 PM EDT 2012-05-27 Mostly Cloudy, 78°F
Mr. Knick Knack! Children's Performance 10:00 AM EDT 2012-05-28 Clear, 78°F
BULGARE \"Bulgaria Through The Centuries\" 6:00 PM EDT 2012-05-28 Chance of a Thunderstorm, 83°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Gaithersburg 73 °F Clear 8:15 AM EDT
Dulles Airport 72 °F Scattered Clouds 7:52 AM EDT
Washington 74 °F Mostly Cloudy 7:52 AM EDT
Leesburg 70 °F Clear 8:15 AM EDT
View all Aviation Tools
Flight To ETA Status
RPA3261
Columbus, OH 		KDCA 08:16AM On Time
PDT4631
Philadelphia, PA 		KDCA 08:19AM On Time
AWI3652
Nashville, TN 		KDCA 08:38AM On Time
RPA3436
Indianapolis, IN 		KDCA 08:41AM On Time
AWI3812
Charlotte, NC 		KIAD 09:01AM On Time
ANA2
Tokyo (Narita) 		KIAD 10:04AM On Time
UAL923
London, England 		KIAD 10:27AM On Time
KAL93
Incheon (near Seoul) 		KIAD 10:55AM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KJYO)
Wind Speed: 6.0 kts.
Wind Dir: 180° (South)
Ceiling: Unlimited

METAR KJYO 271215Z AUTO 18006KT 10SM CLR 21/20 A3016 RMK AO2

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Sports
Event Date Forecast
Rockies vs. Reds 1:10 PM EDT on May 27, 2012 Partly Cloudy, 94 °F
Padres vs. Mets 1:10 PM EDT on May 27, 2012 Partly Cloudy, 79 °F
Braves vs. Nationals 7:05 PM EDT on June 01, 2012 Chance of a Thunderstorm, 74 °F
Braves vs. Nationals 4:05 PM EDT on June 02, 2012 Partly Cloudy, 72 °F
Event Date Forecast
Crewe Alexandra vs. Cheltenham Town 3:00 PM BST on May 27, 2012 Clear, High 75° F/ 24° C
Huesca vs. Deportivo 8:00 PM CEST on May 27, 2012 Chance of Rain, High 62° F/ 17° C
Montreal vs. D.C. 7:30 PM EDT on June 30, 2012 Average High 87° F/ 30° C
Columbus vs. D.C. 7:30 PM EDT on August 04, 2012 Average High 88° F/ 31° C
Event Date Forecast
Coca-Cola 600 6:16 PM EDT on May 27, 2012 Partly Cloudy, 85 °F
FedEx 400 benefiting Autism Speaks 1:15 PM EDT on June 03, 2012 Average High 79° F/ 26° C
Event Date Forecast
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 27, 2012 Partly Cloudy, 79 °F
the Memorial Tournament presented by Nationwide Insurance 8:30 AM EDT on May 31, 2012 Partly Cloudy, 56 °F
AT&T National 8:30 AM EDT on June 28, 2012 Average High 86° F/ 29° C
AT&T National 8:30 AM EDT on June 29, 2012 Average High 87° F/ 30° C
View all Sports Weather
Weather Stations
Station Location Temp. Heat Index Dew Point Humidity Wind Precipitation Elevation Updated Type Website
APRSWXNET Great Falls V, Great Falls, VA 72 °F - 68 °F 88% SSW  at  0 mph 0.00 in / hr 296 ft 8:01 AM EDT MADIS
Great Falls VA, Great Falls, VA 72.8 °F 72 °F 67 °F 83% SW  at  0.0 mph - / hr 380 ft 8:26 AM EDT Normal
APRSWXNET Great Falls VA , Great Falls, VA 69 °F - 66 °F 91% SW  at  0 mph 0.00 in / hr 380 ft 7:26 AM EDT MADIS
Hickory Creek, Great Falls, VA 69.6 °F - 68 °F 95% SSE  at  0.0 mph 0.00 in / hr 350 ft 8:29 AM EDT Rapid Fire
Potomac Woods, Rockville, MD 73.2 °F 73 °F 68 °F 84% NE  at  3.0 mph 0.00 in / hr 453 ft 8:29 AM EDT Rapid Fire  
Avalon at Traville, North Potomac, MD 73.3 °F 73 °F 68 °F 82% West  at  0.0 mph 0.00 in / hr 422 ft 8:29 AM EDT Rapid Fire  
APRSWXNET Darnestown1-SW MD , Germantown, MD 70 °F - 68 °F 92% ESE  at  0 mph 0.00 in / hr 395 ft 7:41 AM EDT MADIS
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 72.1 °F 70 °F 68 °F 88% WSW  at  0.0 mph 0.00 in / hr 295 ft 8:25 AM EDT Normal  
Lake Fairfax, Vienna, VA 73.1 °F 72 °F 69 °F 86% SE  at  4.0 mph 0.00 in / hr 275 ft 8:29 AM EDT Rapid Fire
APRSWXNET Bethesda MD , Washington, DC 72 °F - 69 °F 89% ENE  at  0 mph 0.00 in / hr 403 ft 7:58 AM EDT MADIS
Woodley Gardens, Rockville, MD 71.8 °F 70 °F 67 °F 86% SSE  at  0.0 mph 0.00 in / hr 451 ft 8:25 AM EDT Normal
APRSWXNET Great Falls VA , Sterling, VA 70 °F - 68 °F 93% South  at  0 mph 0.00 in / hr 321 ft 7:50 AM EDT MADIS
APRSWXNET Reston VA , Herndon, VA 72 °F 70 °F 68 °F 87% SSW  at  0 mph 0.00 in / hr 454 ft 8:03 AM EDT MADIS
Muddy Branch Park, Gaithersburg, MD 71.3 °F - 69 °F 93% SSW  at  0.0 mph 0.00 in / hr 394 ft 8:29 AM EDT Rapid Fire  
MDDOT I-270 @ I-370, Gaithersburg, MD 73 °F 73 °F 67 °F 83% WSW  at  1 mph 0.00 in / hr 449 ft 8:10 AM EDT MADIS
APRSWXNET Reston VA , Herndon, VA 71 °F - 67 °F 88% SSE  at  1 mph 0.00 in / hr 400 ft 7:50 AM EDT MADIS
Falls Brook, Herndon, VA 72.4 °F 71 °F 68 °F 87% South  at  1.0 mph 0.00 in / hr 280 ft 8:18 AM EDT Normal  
Longhorn, Gaithersburg, MD 71.5 °F 71 °F 66 °F 84% South  at  0.0 mph 0.00 in / hr 432 ft 8:25 AM EDT Normal
Greenwich Forest, Bethesda, MD 74.1 °F 74 °F 68 °F 83% NW  at  1.0 mph 0.00 in / hr 338 ft 8:29 AM EDT Rapid Fire
Golf Course Island, Reston, VA 73.3 °F 74 °F 67 °F 80% South  at  0.0 mph 0.00 in / hr 390 ft 8:29 AM EDT Rapid Fire  
Hawk Ridge Subdivision, Reston, VA 70.8 °F - 69 °F 94% West  at  0.0 mph 0.00 in / hr 300 ft 8:20 AM EDT Normal
NE Vienna, Vienna, VA 72.0 °F 70 °F 68 °F 87% SSE  at  2.0 mph - / hr 417 ft 8:14 AM EDT Normal  
Beulah-Wolf Trap, Vienna, VA 73.4 °F 73 °F 68 °F 84% South  at  0.0 mph 0.00 in / hr 430 ft 8:29 AM EDT Rapid Fire  
Weatherscience.net, Potomac Falls, VA 75.3 °F 76 °F 69 °F 81% ENE  at  1.2 mph 0.00 in / hr 276 ft 8:29 AM EDT Rapid Fire
Reston - West Market, Reston, VA 74.3 °F 75 °F 67 °F 79% WNW  at  0.0 mph 0.00 in / hr 430 ft 8:29 AM EDT Rapid Fire  
Cedar Cove Cluster, Reston, VA 73.0 °F 72 °F 68 °F 85% NNE  at  0.0 mph 0.00 in / hr 350 ft 8:29 AM EDT Rapid Fire  
Bennington, Gaithersburg, MD 71.7 °F - 68 °F 89% WSW  at  0.0 mph 0.00 in / hr 380 ft 8:25 AM EDT Normal  
Cloppers Mill East, Germantown, MD 72.3 °F - 69 °F 89% SSE  at  0.0 mph 0.00 in / hr 315 ft 8:29 AM EDT Rapid Fire
MDDOT I-495 @ Connecticut Ave, Bethesda, MD 77 °F 78 °F 72 °F 85% ESE  at  0 mph 0.00 in / hr 230 ft 8:11 AM EDT MADIS
Somerset, Chevy Chase, MD 74.0 °F 74 °F 68 °F 83% South  at  4.0 mph 0.00 in / hr 330 ft 8:25 AM EDT Normal
Bethesda, Bethesda, MD 74.0 °F 73 °F 71 °F 89% North  at  0.0 mph 0.00 in / hr 236 ft 8:29 AM EDT Rapid Fire  
Flower Valley, Rockville, MD 76.3 °F 78 °F 68 °F 77% SSE  at  0.0 mph 0.00 in / hr 347 ft 8:22 AM EDT Normal  
Trott Ave, Vienna, VA 73.6 °F 72 °F 70 °F 88% West  at  0.0 mph - / hr 415 ft 8:28 AM EDT Normal  
Brookdale, Bethesda, MD 76.0 °F 77 °F 69 °F 79% SW  at  0.0 mph 0.00 in / hr 262 ft 8:29 AM EDT Rapid Fire  
Montgomery Village, MD 74.1 °F 76 °F 62 °F 65% North  at  - - / hr 350 ft 8:29 AM EDT Rapid Fire
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Air Quality Alert
Mobile & Email Alerts Statement as of 4:25 PM EDT on May 26, 2012

... Air quality alert is in effect for Sunday may 27 2012...

The metropolitan Washington Council of governments in association
with Maryland department of the environment, Virginia department
of environmental quality, and district department of environment
has issued a code Orange air quality alert Sunday for
the DC Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for sensitive
groups. Sensitive groups include children... people suffering from
asthma... heart disease or other lung diseases... and the elderly.
The effects of air pollution can be minimized by avoiding strenuous
activity or exercise outdoors.

For more information on ground-level ozone and fine
particles... visit www.Cleanairpartners.Net.