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Weather Advisories Exist!
Forecast For: Reston, Virginia
Partly Cloudy Afternoon/Evening Thunderstorms Heavy Thunderstorms Afternoon/Evening Thunderstorms Partly Cloudy Partly Cloudy A Chance of Thunderstorms A Chance of Thunderstorms A Chance of Thunderstorms  
 
       
Currently:5 miles away at Washington-Dulles International Airport 9:52 GMT
Visibility:10 miles Pressure:29.98 in
Wind:S 6 mph Humidity:87%
Feels Like:76 ° F Dew Point:72 ° F
Temperature:76 ° F Weather:Partly Cloudy
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NWS Forecast Discussion 1.9 hrs old
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Washington, DC : 07/17/2019 10:47 GMT
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Aviation Observations/Forecasts

METAR: KIAD 170952Z 18005KT 10SM FEW180 SCT250 24/22 A2999 RMK AO2 SLP153 T02440222 =
TAF:
TAFIAD
TAF AMD
KIAD 170831Z 1709/1812 20005KT P6SM SCT150
FM171500 22008KT P6SM SCT050 SCT130
FM172200 22008KT P6SM VCTS BKN050CB BKN130
FM180400 22005KT P6SM SCT050 BKN130 =


National Weather Service Zone Forecast
For: Fairfax (VAZ053)


fairfax- including the cities of reston, herndon, annandale, centreville, chantilly, mclean, and franconia
435 AM EDT WED JUL 17 2019 ...heat advisory in effect from 11 am this morning to 8 pm edt this evening... Rest of the overnight...mostly cloudy. Lows in the lower 70s. south winds around 5 mph.

TODAY

Mostly sunny. Isolated showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph, increasing to 10 to 15 mph in the afternoon. Chance of rain 20 percent.

TONIGHT

Mostly cloudy. Numerous showers and scattered thunderstorms in the evening, then isolated showers after midnight. Some thunderstorms may produce gusty winds and heavy rainfall in the evening. Lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 70 percent.

THURSDAY

Mostly cloudy in the morning, then becoming partly sunny. Scattered showers. Scattered thunderstorms in the afternoon. Highs in the lower 90s. West winds around 5 mph. chance of rain 50 percent.

THURSDAY NIGHT

Partly cloudy. Scattered showers and thunderstorms in the evening. Lows in the mid 70s. West winds around 5 mph. Chance of rain 50 percent.

FRIDAY

Sunny, hot with highs in the upper 90s.

FRIDAY NIGHT

Partly cloudy. Lows in the upper 70s.

SATURDAY

Mostly sunny. Hot with highs around 100. Heat index values up to 110.

SATURDAY NIGHT

Partly cloudy. Lows in the upper 70s.

SUNDAY

Mostly sunny with a chance of showers and thunderstorms. Hot with highs in the upper 90s. Chance of rain 30 percent.

SUNDAY NIGHT

Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 30 percent.

MONDAY

Showers and thunderstorms likely. Highs in the lower 90s. Chance of rain 60 percent.

MONDAY NIGHT

Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent.

TUESDAY

Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent.
GFS Forecast for KIAD
Time zone: EST
Day Jul 17 Jul 18 Jul 19 Jul 20 Jul 21 Jul 22 Jul 23 Jul 24
Hour  7a   10a   1p   4p   7p   10p   1a   4a   7a   10a   1p   4p   7p   10p   1a   4a   7a   10a   1p   4p   7p   10p   1a   4a   7a   10a   1p   4p   7p   10p   1a   4a   7a   10a   1p   4p   7p   10p   1a   4a   7a   10a   1p   4p   7p   10p   1a   4a   7a   10a   1p   4p   7p   10p   1a   4a   7a 
Temp 75 86 93 94 86 75 73 72 76 85 89 90 84 78 75 73 77 88 95 96 86 81 78 77 82 92 99 100 90 84 81 78 82 91 97 96 90 80 77 77 79 83 82 78 77 73 72 70 67 69 76 78 73 70 64 62 64
Wind 7 4 4 9 7 7 2 2 4 4 7 4 0 2 2 2 2 4 2 2 4 2 2 2 2 2 2 4 2 2 2 2 4 4 2 4 2 2 0 2 2 4 7 4 2 2 0 4 4 4 4 7 2 4 4 4 7
Dir
Skies
Precip 0.02 0.00 0.00 0.00 0.00 0.12 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.20 0.06 0.00 0.00 0.00 0.10 0.05 0.01 0.02 0.01 0.09 0.13 0.13 0.02 0.02 0.02 0.00 0.00 0.00 0.00
RH 90 68 48 48 60 87 92 92 86 65 58 57 70 81 83 83 75 56 43 41 59 62 66 73 74 57 45 41 54 58 68 74 73 57 46 47 57 83 85 86 82 71 77 81 87 89 90 91 94 92 73 67 73 70 72 76 74
Tmax 76 86 93 94 94 86 86 73 76 85 89 91 91 84 83 75 78 88 95 97 97 86 86 79 82 92 99 101 101 89 89 81 82 91 97 98 98 90 90 78 80 85 89 82 83 76 76 72 72 69 76 79 79 73 73 64 65
Tmin 72 75 76 93 86 75 72 72 72 77 77 89 84 78 75 73 73 78 78 95 86 81 78 77 77 82 82 98 90 84 81 78 78 82 82 93 89 79 77 76 76 79 79 78 77 73 72 70 67 67 67 76 73 69 64 62 61
Max Temp: 100
Min Temp: 62
Total Precip: 1.02

Atlantic
Tropical Watch