Air Sports Net
Aviation Weather Report for Nantucket, Massachusetts
Current Conditions at
NANTUCKET, MA - (KACK)
45°
Feels like 38°F
Cloudy
Light Rain Mist
as of 5:53 PM EDST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 2 Miles
Pressure: 29.81 in.
Flight Rule: LIFR
Sun Almanac
Naut Sunrise:
5:28 AM
Civil Sunrise:
6:01 AM
Sunrise:
6:29 AM
Sunset:
7:01 PM
Civil Sunset:
7:29 PM
Naut Sunset:
8:02 PM
Wind Data
12 MPH
330° Northwest
Cloud Level(s): Solid Overcast at 300 ft
Current Conditions at
CHATHAM, MA - (KCQX)
46°
Cloudy
Rain Mist
as of 6:29 PM EDST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 2 Miles
Pressure: 29.80 in.
Flight Rule: LIFR
Sun Almanac
Naut Sunrise:
5:27 AM
Civil Sunrise:
6:00 AM
Sunrise:
6:28 AM
Sunset:
7:01 PM
Civil Sunset:
7:29 PM
Naut Sunset:
8:02 PM
Wind Data
7 MPH
350° North
Cloud Level(s): Broken at 400 ft, Solid Overcast at 2400 ft
Current Conditions at
HYANNIS, MA - (KHYA)
45°
Cloudy
Rain Mist
as of 6:17 PM EDST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 2 1/2 Miles
Pressure: 29.79 in.
Flight Rule: LIFR
Sun Almanac
Naut Sunrise:
5:29 AM
Civil Sunrise:
6:02 AM
Sunrise:
6:29 AM
Sunset:
7:02 PM
Civil Sunset:
7:30 PM
Naut Sunset:
8:03 PM
Wind Data
8 MPH
010° North
Cloud Level(s): Solid Overcast at 300 ft
Massachusetts Weather Conditions
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Change Location in Massachusetts
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Massachusetts
Aviation Weather Forecast at Nantucket, Massachusetts
Station: KACK    North: 41.25    West: -70.07    Timezone: Eastern Daylight Saving Time    UTC: -4    Model: National Blend of Models - Aviation Format
DATE       
HOUR8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM
SKY Cloudy
Aviation Weather 91% Clouds
Cloudy
Aviation Weather 90% Clouds
Cloudy
Aviation Weather 90% Clouds
Cloudy
Aviation Weather 93% Clouds
Cloudy
Aviation Weather 90% Clouds
Cloudy
Aviation Weather 96% Clouds
Cloudy
Aviation Weather 93% Clouds
Mostly Cloudy
Aviation Weather 85% Clouds
Mostly Cloudy
Aviation Weather 73% Clouds
Partly Cloudy
Aviation Weather 45% Clouds
Mostly Clear
Aviation Weather 15% Clouds
Mostly Clear
Aviation Weather 14% Clouds
Clear
Aviation Weather 9% Clouds
Clear
Aviation Weather 10% Clouds
Clear
Aviation Weather 6% Clouds
Mostly Clear
Aviation Weather 15% Clouds
Partly Cloudy
Aviation Weather 56% Clouds
Partly Cloudy
Aviation Weather 58% Clouds
Mostly Cloudy
Aviation Weather 70% Clouds
Mostly Cloudy
Aviation Weather 72% Clouds
Partly Cloudy
Aviation Weather 58% Clouds
Partly Cloudy
Aviation Weather 62% Clouds
TEMP
(F)
43
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42
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41
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42
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45
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WIND CHILL37363431303134363532292829343736363637363739
WIND DIRECTION
(AZIMUTH)

Help

360
Wind Direction

360
Wind Direction

360
Wind Direction

350
Wind Direction

340
Wind Direction

330
Wind Direction

310
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

280
Wind Direction

270
Wind Direction

260
Wind Direction

260
Wind Direction

260
Wind Direction

260
Wind Direction

280
Wind Direction

310
Wind Direction

310
Wind Direction
AVERAGE
WIND SPEEDS

(MPH)

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10
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13
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16
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11
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7
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7
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8
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10
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MAXIMUM
WIND GUST SPEEDS

(MPH)

Help
14
Wind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust Speed
19
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24
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31
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31
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31
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29
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24
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22
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16
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11
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8
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11
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13
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HOUR8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM
DATE       
HOUR8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM
CLOUD COVERAGE
%
91 90 90 93 90 96 93 85 73 45 15 14 9 10 6 15 56 58 70 72 58 62
CLOUD
BASE
@ 60%
COVERAGE
(AGL in
Feet)


Help

300
Cloud Base % Coverage in Feet

300
Cloud Base % Coverage in Feet

300
Cloud Base % Coverage in Feet

400
Cloud Base % Coverage in Feet

500
Cloud Base % Coverage in Feet

500
Cloud Base % Coverage in Feet

500
Cloud Base % Coverage in Feet

9000
Cloud Base % Coverage in Feet

17K
Cloud Base % Coverage in Feet

3000
Cloud Base % Coverage in Feet

1800
Cloud Base % Coverage in Feet

1800
Cloud Base % Coverage in Feet

6000
Cloud Base % Coverage in Feet
LOWEST
CLOUD
BASE
(AGL in
Feet)


Help

200
Low Cloud Base in Feet

200
Low Cloud Base in Feet

300
Low Cloud Base in Feet

400
Low Cloud Base in Feet

500
Low Cloud Base in Feet

500
Low Cloud Base in Feet

500
Low Cloud Base in Feet

7000
Low Cloud Base in Feet

13K
Low Cloud Base in Feet

22K
Low Cloud Base in Feet

21K
Low Cloud Base in Feet

6000
Low Cloud Base in Feet

26K
Low Cloud Base in Feet

25K
Low Cloud Base in Feet

18K
Low Cloud Base in Feet

3000
Low Cloud Base in Feet

200
Low Cloud Base in Feet

200
Low Cloud Base in Feet

4000
Low Cloud Base in Feet
VISIBILITY
(Miles)
1
VisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibility
0
VisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibility
0
VisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibility
2
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1
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0
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0
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8
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10
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10
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10
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10
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10
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10
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10
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10
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10
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10
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10
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10
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10
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10
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FLIGHT RULE

Help
LIFRLIFRLIFRLIFRIFRLIFRLIFRVFRVFRVFRVFRVFRVFRVFRVFRVFRVFRVFRMVFRLIFRLIFRVFR
HOUR8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM
DATE       
HOUR8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM
CHANCE OF PRECIP
-
Chance of Precipitation
100%
Chance of Precipitation
99%
Chance of Precipitation
95%
Chance of Precipitation
53%
Chance of Precipitation
5%
Chance of Precipitation
2%
Chance of Precipitation
1%
Chance of Precipitation
1%
Chance of Precipitation
9%
Chance of Precipitation
13%
Chance of Precipitation
PRECIP AMOUNT
(RANGE
IN INCHES)
 - 0.46 0.61 0.41 0.03 - - - - -
CHANCE OF THUNDER
%

Help
5
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
3
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
2
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1
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1
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1
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0
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0
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0
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0
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0
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0
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0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
1
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
0
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
PROBABILITY THAT PRECIP IS RAIN
%


Help
1001009910099939027400000017151118189
PROBABILITY THAT PRECIP IS SNOW
%


Help
00000240000000000000111
REL HUM
%

Help
96
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
96
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
96
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
96
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
92
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
85
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
76
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
70
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
64
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
64
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
67
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
69
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
67
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
59
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
60
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
67
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
73
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
76
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
79
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
82
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
79
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
70
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
DEW POINT
(F)

Help
42
Dew PointDew PointDew PointDew PointDew PointDew PointDew PointDew Point
42
Dew PointDew PointDew PointDew PointDew PointDew PointDew PointDew Point
41
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40
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38
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37
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36
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35
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32
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30
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29
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29
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36
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36
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36
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36
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TEMP
DEW POINT
SPREAD

(F)

Help
1
Temp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point Spread
1
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1
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2
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4
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7
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9
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11
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10
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13
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13
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10
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8
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7
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6
Temp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point Spread
5
Temp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point Spread
6
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9
Temp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point SpreadTemp Dew Point Spread
HOUR8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM8:00 AM11:00 AM
DATE       
Massachusetts State Summary
of upper and lower values of current conditions amongst 22 locations
in Massachusetts
High
Temp
52°
Taunton
and 2 other locations
Low
Temp
39°
Pittsfield
Wind
Speed
12mph
Nantucket
Wind
Chill
39°
Nantucket
High
Pressure
29.92Hg
North Adams
Low
Pressure
29.79Hg
Hyannis
Average temperature in Massachusetts 48°
# Locations Reporting Rain 20
# Locations Reporting IFR
(Instrument Flight Rules)
7
# Locations Reporting MVFR
(Marginal Visual Flight Rules)
7
# Locations Reporting VFR
(Visual Flight Rules)
8



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The Raw Data used in this forecast was obtained from the National Weather Service's National Blend of Models and is not subject to copyright protection. The contents, including graphics and display format, are under copyright by Air Sports Net.

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Regardless of what this program has forecasted, it is not intended to be a substitution for good common sense. Check your conditions before you launch and only launch in conditions that you are familiar with and are certified to fly in. The user assume the entire risk associated with the use of this data. Fly safely.

This forecast and the related content/links on this page are not a substitution for the official weather briefing from the FAA. Please contact the FAA for more information on pilot briefings or call 1-800-WX-BRIEF.

As with all forecasts, weather conditions can change dramatically from what has been forecasted. We do not guarantee the weather forecast is accurate enough to be used for flying. Use extreme caution before flying any aircraft. By using this forecast, you agree that there may be differences in forecast conditions and actual flying conditions. You also agree that we shall not be liable for any compensatory, direct, indirect, incidental, consequential or punitive damages, income or profit loss, or any claims of any parties whatsoever with respect to this service. These terms may change from time to time without notice. Further terms of use can be found at https://www.usairnet.com/terms.htm

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Launch Code Frequently Asked Questions

Q) Can you add another city to the list of available cities in the Launch Code program?.

A) The list of cities shown is the cities in which the National Weather Service has forecast for. We believe that this list is the most current available but from time to time we do omit a city without knowing. You can check our list against the NWS list by visiting this page and comparing it to our list of cities. If you find a city not listed on our site, please contact us and we will add the forecast to our database.

Q) The Launch Code time is 3 hour time blocks. What is the forecast for other times than the ones shown?

A) The National Weather Service only provides the data in 3 hour blocks. You can estimate what the forecast might be at a particular time by using the times before and after the time you want. The temperature and wind speed graphs utilizes such an estimate by connecting the data with a straight line.

Q) How accurate is the forecast?

A) You local accuracy may vary from week to week and season to season. We have found that the forecast are generally accurate and often very close. We do get the occasional email that complains about the accuracy but 99% of all emails concerning accuracy have spoken highly of the quality of the forecast. Just remember that there are no guarantees of accuracy or suitability for a particular purpose. The National Weather Service has performed accuracy test on their forecast data. The results of these tests can be found at http://www.nws.noaa.gov/mdl/synop/smbpublications.php

Q) Does the time correspond to the middle of the box or to either the left or right side of the column?

A) The times shown going across the page is representative of the middle of the column that it is in.

Q) Are the altitudes MSL or AGL?

A) Altitudes are based upon Above Ground Level (AGL) for the height of cloud base.

Q) Does the cloudbase / ceiling range show the forecasted top and bottom of the clouds?

A) No. The cloudbase / ceiling is the elevation range of the bottom of the cloud. There is no reference given to the top of the cloud.

Q) What is an Azimuth?

A) See this page for help with understanding azimiths

Q) I have noticed that the date on the raw data screen and National Weather Service web page is different than the date shown on the Launch Code forecast page. Why?

A) At first glance it may look like the dates generated by the Launch Code program are different. Actually there is no difference in the time the weather events occur. The data from the National Weather Service and the raw data screen is based upon Universal Time Code or UTC. UTC is the time in London England. If the date of the UTC is for 0100 on July 4th or 1:00 am July 4th then this would equate to 9:00 PM on July 3rd for the east coast of the USA (DST). Why? Just as there is a difference in New York time and California time, there is a difference in UTC time and your local time. The Launch Code program automatically converts the UTC time to the local time of the forecast city.

Q) Why are the humidity, dew point, and the temperature dew point spread important.

A) See this page for help with understanding humidity, dew point, and spread and how it interacts with flying.

Q) Why can't I see the entire forecast on my computer screen without having to scroll to the right?

A) If you can't see the entire forecast without scrolling left and right, you can change your screen resolution. For Windows users, simply right click anywhere on an empty space on your desktop, select properties, select settings, then select your screen resolution by sliding the screen resolution bar to the right. This page is best viewed with a 1280 x 1024 or larger screen resolution. For more information on changing your screen resolution visit this Microsoft Windows page

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