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Clouds over the Blue Ridge in Autumn

South of Round Hill, VA

WX Check FAQ


Why would I want to use the WxCheck program?

It’s a quick easy organized way to perform several of your preflight checks. In addition to a quick read on the weather you also have 3 related internet sites pre-loaded into the user defined pages. This is kind of like having 3 home pages loaded for you at startup.


Where do you get the weather information?

The weather information used on the Current Tab is taken from METARs decoded and downloaded from the internet. This is the same information you are using today from NOAA’s National Weather Service Aviation Digital Data Service.


How do I get the information?

A standard internet connection is required.


How do I get WxCheck on a CD?

Sorry, at the moment it’s only available by download.


OK, I tried the Trial Version, I liked it and bought a Product Key.

How do I enter the key to make the Trial message go away?

Click on the Help menu and Select Register. You will get a form that allows the key to be entered. Once the Key is entered you will no longer get the Trial message and the product will not expire.


Where does the Forecast come from?

The information displayed on the Forecast Tab is taken from NOAA’s National Weather Service Meteorological Development Lab.

This web site describes this product as follows: “Model Output Statistics (MOS) is a technique used to objectively interpret numerical model output and produce site-specific guidance. “

The presentation here is similar to the presentation of the METAR, however keep in mind that this is a forecast and should not be confused with the METAR historical observations.


What airport data is in the airport data base?

The airport data base contains METAR stations from around the world. The domestic US commercial airports also contain runway and elevation information. The runway data is used to calculate both headwind and crosswind components based on runway heading. The elevation data is used to calculate pressure and density altitudes.

At this time we don’t have runway information for stations outside the US, but WxCheck provides pages that allow this information to be added or updated.


PLEASE NOTE: This airport data is supplied “as-is”. No flight planning should be based on this data. We make no representation about the accuracy or completeness of this information.


Can I update the Airport Data base?

Yes, There are screens provided to allow update of the Airport/METAR station information. Stations can be added, changed or deleted. An ‘Alternate METAR’ station may also be defined. If an airport of interest doesn’t have automated METARs you can define a nearby station to be used as an alternate source of METAR data. This alternate could be used to calculate local headwind and crosswind.


Some METARs are created by hand, how does WxCheck deal with these?

It does the best it can under the circumstances. Some information found in a METAR is just not predictable and therefore it can be difficult to deal with in a computer program. The latest METAR is always displayed in it’s raw format at the bottom of the Current page. There is also a “METARs” link at the bottom of the Current page that can be used to display all available METAR data. Sometimes you may just have to eyeball the raw numbers to get a good interpretation.


What system of measurement is used for non-US observations?


WxCheck was originally designed to deal with weather data from the US. Some effort has been made to present METARs  from around the world. Some of this information can be in an unpredictable format (see the answer to the previous question).

An attempt is made to convert Visibility and Altitude data to miles and feet. Wind speed is converted to Miles Per Hour. Temperature and Dew point are both shown in both degrees Fahrenheit and Celsius.


Be careful to double check any of these weather values since, as is stated above, the format of this can be somewhat unpredictable.


OK, so how exactly do I use this software?


Well, there is a ton of weather information available here, but the quick answer is just start it up and check the colors. Green means go, red means stop.

Of course the complete weather picture is usually much more complex than that, but the colors give you a quick read on the overall conditions.

The first thing I see are the color codes. Then I look for trends on the graphs. Are conditions improving or degrading?

Then I’ll click a few pre-set buttons to cross-check the conditions at other local stations.

The next page, METARs, shows me the local METARs and TAFs for stations I’ve selected so I start to get a feel for the forecast.

The weather Forecast page gives me an idea of how conditions may change over the next few days. This must be treated as you would treat any forecast, but it is usually a good indicator of expected trends. The graphs give a nice high-level view of expected conditions and changing trends.

I have my first user-defined tab set to the Aviation Weather Center. I really like this web site. The map on the first page gives a nice read of conditions nationwide. The weather here in northern Virginia usually comes from the NNW so I use this map and it’s color coded dots to get a feel for what’s coming. Then I use the menu on the left side of this page to go through each element of Observations, Forecasts and Advisories.

I have the next user-defined tab set to the scheduling page at the local FBO. I use this to make reservations and to make sure the reserved aircraft is available.

The next Tab is set to the Duats home page. Here inside the DC ADIZ a flight plan is needed for every flight. I usually file using this Duats page.

The final page is the options tab. The options on this page are used to customize the other Tabs.


That’s the routine. I just start with the first tab and flip through each one. When I’m finished I have all the information I need, the aircraft is reserved and the flight plan is filed.

In Sim FAQ


Why would I want to use the inSim program?

If you are an instrument student, or really any pilot, you will get a better understanding of what can be some difficult topics. VOR and NDB navigation, Holds and headwind/crosswind component calculation.


Why don’t I just read about it in my text book?

This is more fun.


Go ahead and read the text book, that’s important, then take a break and play with inSim for a while.


Why did you build this software?

For my own use. At first I just wanted to see what it would take to build it. Then I thought it was kind of fun sliding the controls and watching the configurations change. I showed it to some other pilots and they enjoyed it too.


What is the “pong mode”?

On the VOR Tab you can click the “pong mode” button and watch the little airplane fly random patterns around the screen. While the plane is flying you can see the changes in the VOR, ADF and HSI/DG needles. It’s a nice way to relax and watch how the needles react to the relative movements of the airplane. You can also change the heading of the airplane by using the Heading knob on the DG/HSI. It’s not the worlds most sophisticated simulator, but the price is right and you can let it run on you PC at work when you need a break and you might even learn a little something about how the needles work.

Release Log

3/25/2014 - Version of WxCheck - Airport database update and 7 new T&L airplanes: Air Tractor 802-A 1424 SHP, Air Tractor 802-A 1173 SHP, Air Tractor 802 PT6A-67AG, Beechcraft Bonanza M35, Cessna 177-RG, Mooney M20K, Piper PA-28-181 Archer II Flaps 25
2/16/2014 - Version of WxCheck - Airport database update
10/24/2013 - Version of WxCheck Add about a dozen new planes, separate and update the T&L and W&B screens. Add new T&L screens that show graphically how the calculation is being performed.
7/5/2012 - Version of WxCheck Add four new airplanes Grumman AA-5B Tiger POH Rev 4 1983, Grumman AA5B-137 1979 Owner's Manual, Cessna 172-M POH, Piper PA-28R-201T Turbo Arrow III, Update Cessna 172-M 1974 Owner's Manual and use the new URL for METARs
10/12/2011 - Version of WxCheck Add five new airplanes: Diamond DA 20-C1 with Gross Weight Increase, Diamond DA-40, Mooney M20M, Piper PA-28-236 Dakota, Piper PA-32-301 Saratoga
12/11/2010 - Version of WxCheck Add the Beechcraft Bonanza V35
10/12/2010 - Certificated Flight Instructor Instrument
9/15/2010 - Version of WxCheck Update the WxCheck Help file
7/10/2010 - Version of WxCheck Add the Cessna 182-R
- A few minor bug fixes
12/30/2009 - Version of WxCheck Add the Cessna 172-S
- Add the “Add Using” button for Airplanes - allows user to make a copy of an existing airplane
8/14/2009 - CFI Tools iPhone Apps available on the iTunes App Store - visit
6/22/2009 - Version of WxCheck Add the Cirrus SR20
Add the Crosswind Calculator Tab
5/21/2009 - Certificated Flight Instructor
11/21/2008 - Version of inSim available - add the Draw Radials button
11/21/2008 - Advanced Ground Instructor, Instrument Ground Instructor
10/15/2008 - Version of inSim available on the web
9/24/2008 - Commercial Pilot ASEL
9/2/2008 - Version Change the winds aloft display
8/27/2008 - Version Add the Winds Aloft Forecast to the Current Tab
  - Add the distance and bearing to station to the Current Tab, Add the Translate option to the Metars Tab
7/17/2008 - Version Add the Piper Arrow III PA-28R-201
6/26/2008 - Version Add the Diamond DA-20 C1, fix some bugs
4/8/2008 - Add the Piper Archer II PA28-181
4/7/2008 - Update some takeoff and landing numbers
4/1/2008 - Version of WxCheck available on the web, this version contains Airplanes and Takeoff and Landing distance calculation
3/6/2008 - Instrument Rating
3/1/2008 - Version of WxCheck available on the web
3/1/2008 - Version of inSim available on the web
2/1/2008 - Release Version of WxCheck available on the web
2/1/2008 - Release Version of inSim available on the web
1/14/2008 - Trial versions available
1/11/2008 - web site active
10/18/2007 - Version 1.1 of WxCheck
8/6/2007 - Version 1.0 inSim
5/17/2007 - Private Pilot ASEL
11/30/2006 - Version 1.0 of WxCheck
9/26/2006 - Student Certificate


Shenandoah Valley Regional Airport (KSHD)

Staunton/Waynesboro/Harrisonburg, VA

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