Air Sports Net
Aviation Weather Report for Portsmouth, New Hampshire
Current Conditions at
PORTSMOUTH, NH - (KPSM)
46°
Cloudy
Light Rain Mist
as of 8:34 AM EDST
Rel. Humidity: 93%
Dew Point: 45°F
Visibility: 3 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Sun Almanac
Naut Sunrise:
5:29 AM
Civil Sunrise:
6:02 AM
Sunrise:
6:31 AM
Sunset:
7:05 PM
Civil Sunset:
7:34 PM
Naut Sunset:
8:08 PM
Wind Data
Calm
Cloud Level(s): Scattered at 200 ft, Broken at 3700 ft, Solid Overcast at 7500 ft
New Hampshire Weather Conditions
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New Hampshire
Aviation Weather Forecast at Portsmouth, New Hampshire
Station: KPSM    North: 43.08    West: -70.82    Timezone: Eastern Daylight Saving Time    UTC: -4    Model: National Blend of Models - Aviation Format
DATE        
HOUR2:00 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 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM
SKY Cloudy
Aviation Weather 92% Clouds
Cloudy
Aviation Weather 91% Clouds
Cloudy
Aviation Weather 93% Clouds
Cloudy
Aviation Weather 91% Clouds
Cloudy
Aviation Weather 95% Clouds
Cloudy
Aviation Weather 97% Clouds
Cloudy
Aviation Weather 95% Clouds
Cloudy
Aviation Weather 93% Clouds
Cloudy
Aviation Weather 91% Clouds
Cloudy
Aviation Weather 91% Clouds
Mostly Cloudy
Aviation Weather 80% Clouds
Partly Cloudy
Aviation Weather 60% Clouds
Mostly Clear
Aviation Weather 35% Clouds
Mostly Clear
Aviation Weather 19% Clouds
Clear
Aviation Weather 8% Clouds
Clear
Aviation Weather 5% Clouds
Clear
Aviation Weather 7% Clouds
Mostly Clear
Aviation Weather 15% Clouds
Mostly Clear
Aviation Weather 33% Clouds
Partly Cloudy
Aviation Weather 47% Clouds
Partly Cloudy
Aviation Weather 58% Clouds
Mostly Cloudy
Aviation Weather 67% Clouds
TEMP
(F)
48
TemperatureTemperatureTemperatureTemperatureTemperatureTemperatureTemperatureTemperature
48
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46
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43
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40
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44
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47
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47
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42
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40
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38
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36
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36
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43
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48
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48
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42
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39
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36
TemperatureTemperatureTemperatureTemperatureTemperatureTemperatureTemperatureTemperature
35
TemperatureTemperatureTemperatureTemperatureTemperatureTemperatureTemperatureTemperature
WIND CHILL46454140373433374040333128252634414235332929
WIND DIRECTION
(AZIMUTH)

Help

50
Wind Direction

360
Wind Direction

350
Wind Direction

350
Wind Direction

340
Wind Direction

330
Wind Direction

330
Wind Direction

320
Wind Direction

310
Wind Direction

310
Wind Direction

300
Wind Direction

300
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

290
Wind Direction

300
Wind Direction

300
Wind Direction
AVERAGE
WIND SPEEDS

(MPH)

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4
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5
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11
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13
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15
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16
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18
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18
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19
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15
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11
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8
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8
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6
Wind SpeedWind SpeedWind SpeedWind SpeedWind SpeedWind SpeedWind SpeedWind Speed
MAXIMUM
WIND GUST SPEEDS

(MPH)

Help
6
Wind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust SpeedWind Gust Speed
8
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11
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12
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22
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24
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27
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24
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29
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22
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17
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12
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11
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10
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HOUR2:00 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 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM
DATE        
HOUR2:00 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 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM
CLOUD COVERAGE
%
92 91 93 91 95 97 95 93 91 91 80 60 35 19 8 5 7 15 33 47 58 67
CLOUD
BASE
@ 60%
COVERAGE
(AGL in
Feet)


Help

400
Cloud Base % Coverage in Feet

300
Cloud Base % Coverage in Feet

400
Cloud Base % Coverage in Feet

300
Cloud Base % Coverage in Feet

400
Cloud Base % Coverage in Feet

800
Cloud Base % Coverage in Feet

2200
Cloud Base % Coverage in Feet

6000
Cloud Base % Coverage in Feet

6000
Cloud Base % Coverage in Feet

7000
Cloud Base % Coverage in Feet

13K
Cloud Base % Coverage in Feet
LOWEST
CLOUD
BASE
(AGL in
Feet)


Help

400
Low Cloud Base in Feet

300
Low Cloud Base in Feet

400
Low Cloud Base in Feet

300
Low Cloud Base in Feet

400
Low Cloud Base in Feet

800
Low Cloud Base in Feet

1600
Low Cloud Base in Feet

2200
Low Cloud Base in Feet

2800
Low Cloud Base in Feet

6000
Low Cloud Base in Feet

13K
Low Cloud Base in Feet

12K
Low Cloud Base in Feet

15K
Low Cloud Base in Feet

26K
Low Cloud Base in Feet

25K
Low Cloud Base in Feet

21K
Low Cloud Base in Feet

15K
Low Cloud Base in Feet

9000
Low Cloud Base in Feet
VISIBILITY
(Miles)
1
VisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibility
1
VisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibility
2
VisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibilityVisibility
2
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2
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3
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5
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7
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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
LIFRLIFRLIFRLIFRLIFRIFRMVFRMVFRMVFRVFRVFRVFRVFRVFRVFRVFRVFRVFRVFRVFRVFRVFR
HOUR2:00 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 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM
DATE        
HOUR2:00 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 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM
CHANCE OF PRECIP
98%
Chance of Precipitation
100%
Chance of Precipitation
94%
Chance of Precipitation
83%
Chance of Precipitation
60%
Chance of Precipitation
26%
Chance of Precipitation
13%
Chance of Precipitation
4%
Chance of Precipitation
1%
Chance of Precipitation
2%
Chance of Precipitation
4%
Chance of Precipitation
PRECIP AMOUNT
(RANGE
IN INCHES)
 0.32 0.54 0.42 0.29 0.18 0.01 - - - -
CHANCE OF THUNDER
%

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1
Chance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of ThunderChance of Thunder
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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
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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
PROBABILITY THAT PRECIP IS RAIN
%


Help
99100100100989591834022422000040336
PROBABILITY THAT PRECIP IS SNOW
%


Help
0000000013121220000000114
REL HUM
%

Help
85
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
82
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
89
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
89
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
89
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
85
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
78
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
64
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
49
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
45
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
50
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
54
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
56
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
58
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
56
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
42
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
35
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
37
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
48
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
54
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
61
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
63
Relative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative HumidityRelative Humidity
DEW POINT
(F)

Help
44
Dew PointDew PointDew PointDew PointDew PointDew PointDew PointDew Point
43
Dew PointDew PointDew PointDew PointDew PointDew PointDew PointDew Point
43
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42
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40
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37
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34
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33
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29
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27
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25
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25
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24
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23
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22
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24
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24
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24
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TEMP
DEW POINT
SPREAD

(F)

Help
4
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
3
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3
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3
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4
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6
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11
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14
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14
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21
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26
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18
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15
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12
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11
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
HOUR2:00 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 AM2:00 PM5:00 PM8:00 PM11:00 PM2:00 AM5:00 AM
DATE        
New Hampshire State Summary
of upper and lower values of current conditions amongst 10 locations
in New Hampshire
High
Temp
46°
Manchester
and 1 other location
Low
Temp
36°
Plymouth Municipal A/P
and 2 other locations
Wind
Speed
7mph
Laconia
High
Pressure
30.02Hg
Lebanon
Low
Pressure
29.94Hg
Manchester
Average temperature in New Hampshire 41°
# Locations Reporting Rain 9
# Locations Reporting IFR
(Instrument Flight Rules)
5
# Locations Reporting MVFR
(Marginal Visual Flight Rules)
4
# Locations Reporting VFR
(Visual Flight Rules)
1



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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.

Terms of Use

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

Launch Code V5.10 ©2002-2024 Air Sports Net - All Rights Reserved
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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