Date   
Re: Weather Form

Ron
 

Larry,

Thanks so much, it looks great. Now I can take readings from my local weather station and send it using Flmsg.

I added:

<META NAME="EDITABLE" CONTENT="true">
<META NAME="MENU_ITEM" CONTENT="Local Weather">

After the <head> tag to make it show up in the list of Custom Forms.

Thanks again, 73, Ron NY3J

On 12/15/2019 9:22 PM, Larry Levesque wrote:
I had to remove a lot of the file load/save and other script functionality for this to work.
Try it out and let me know what you think.



On Tue, Dec 03, 2019 at 10:09:23PM -0500, Ron via Groups.Io wrote:
Hi Larry,

To my rescue again :-) You made a report for the Bucks County's Pandemic
Drill a few years back and man was it a hit.

Attached is the form from Winlink that got me thinking. Hopefully I can send
files to the group.

73, Ron NY3J

On 12/3/2019 9:54 PM, Larry Levesque wrote:
If someone makes a crude drawing of a form with the fields I can create a
custom form

On Tue, Dec 3, 2019 at 9:20 PM Ron via Groups.Io
<rwenig=verizon.net@groups.io <mailto:verizon.net@groups.io>> wrote:

Thanks Michael,

That's what I was thinking. I usually use the WX macro and have the
METAR data pop up. Then copy and paste to an Flmsg. I thought it
would
be cool to have a custom form to enter that information from the
macro
or if someone had a weather station at their QTH then use that data.

73, Ron NY3J

On 12/3/2019 9:05 PM, Michael WA7SKG wrote:
> FWIW, some agencies are gong with a standard METAR format, like
NOAA
> uses for airport weather. It's a quick code format that includes
wind
> speed and direction, current temperature, visibility, cloud
> conditions, barometric pressure, etc.
>
> Michael WA7SKG
>
> Ron via Groups.Io wrote on 12/3/19 12:38 PM:
>> Hi All,
>>
>> During storms in the area we sometimes send out the Storm
Report and
>> Severe WX forms to report conditions. I noticed that Winlink
has just
>> a plain Weather Report form. I was wondering if anyone created a
>> custom form to just report things like the temperature, wind,
>> humidity etc.
>>
>> The custom form process in Flmsg is a nice feature. I just
can't get
>> my HTML skills up enough to design a nice looking form.
>>
>> 73, Ron NY3J
>
>
>




--
Larry Levesque
KA1VGM
Cheshire County EC
NHARES


General Guidelines for Estimating Wind Speeds

+----------------------------------------------------------------+
| 30-44 | Whole trees in motion. Inconvenient walking into the |
| mph | wind. Light-weight loose objects (e.g., lawn |
| (26-39 | furniture) tossed or toppled. |
| kt) | |
|--------+-------------------------------------------------------|
| | Large trees bend; twigs, small limbs break and a few |
| 45-57 | larger dead or weak branches may break. Old/weak |
| mph | structures (e.g., sheds, barns) may sustain minor |
| (39-49 | damage (roof, doors). Buildings partially under |
| kt) | construction may be damaged. A few loose shingles |
| | removed from houses. |
|--------+-------------------------------------------------------|
| 58-74 | Large limbs break; shallow rooted trees pushed over. |
| mph | Semi-trucks overturned. More significant damage to |
| (50-64 | old/weak structures. Shingles, awnings removed from |
| kt) | houses; damage to chimneys and antennas. |
|--------+-------------------------------------------------------|
| | Widespread damage to trees with large limbs down or |
| 75-89 | trees broken/uprooted. Mobile homes may be pushed off |
| mph | foundation or overturned. Roof may be partially |
| (65-77 | peeled off industrial/commercial/ warehouse |
| kt) | buildings. Some minor roof damage to homes. Weak |
| | structures (e.g., farm buildings, airplane hangars) |
| | may be severely damaged. |
|--------+-------------------------------------------------------|
| 90+ | Many large trees broken and uprooted. Mobile homes |
| mph | damaged. Roofs partially peeled off homes and |
| (78+ | buildings. Moving automobiles pushed off the road. |
| kt) | Barns, sheds demolished. |
+----------------------------------------------------------------+

Back to links

+---------------------------------------------------------------------------------------+
| CURRENT LOCAL WEATHER CONDITIONS |
| |
| [ Load Local WX Report Data ] |
|---------------------------------------------------------------------------------------|
| Call sign: __________________ | Observer Name: |
| | _______________________________ |
|-----------------------------------------------------+---------------------------------|
| Date: [ ] | Report Time: (local): [ ] |
|-----------------------------------------------------+---------------------------------|
| Location: | Optional GPS Coordinates: |
| ___________________________________________________ | _______________________________ |
|-----------------------------------------------------+---------------------------------|
| City: _________________________________________ | County: _____________________ |
| State: ___ | |
|---------------------------------------------------------------------------------------|
| Measurements used: [ ] Metric [ ] Imperial |
| |
| Current Condidtions: Check all that apply |
| [ ] SUN [ ] RAIN [ ] THUNDER STORM [ ] HAIL |
| [ ] SNOW [ ] BLIZZARD [ ] TORNADO [ ] HURRICANE |
| [ ] FOG [ ] CLOUDY |
|---------------------------------------------------------------------------------------|
| Temperature [ -- ] °C HUMIDITY: [ -- ] % DEWPOINT [ -- ] °C |
|---------------------------------------------------------------------------------------|
| Barometer _________ millibars Three hour trend [ ] RISING [ ] STEADY [ ] |
| DROPPING |
|---------------------------------------------------------------------------------------|
| Cloud cover description: |
| _______________________________________________________________________ |
|---------------------------------------------------------------------------------------|
| Wind Speed: [ -- ] KM/h |
| [ ] Estimated |
| [ ] Measured Direction From: |
| [ ] Select Direction |
| [ ] North |
| [ ] North East |
| [ ] East |
| [ ] South East |
| [ ] South |
| [ ] South West |
| [ ] West |
| [ ] North West |
| [ ] |
|---------------------------------------------------------------------------------------|
| Wind Gusts: [ -- ] KM/h Wind Gusts MAX: [ -- ] KM/h |
|---------------------------------------------------------------------------------------|
| Rain 1 HR: ___________ millimeters Rain Total: ___________ millimeters |
|---------------------------------------------------------------------------------------|
| Snow 1 HR: ___________ centimeters Snow Total: ___________ centimeters Water |
| Content: ________________ |
|---------------------------------------------------------------------------------------|
| NWS Level: |
| [ ] NONE Issued |
| [ ] ADVISE |
| [ ] WATCH |
| [ ] WARNING _________________________________________ |
|---------------------------------------------------------------------------------------|
| Notes: (optional) |
| |
| ______________________________________________________________________________ |
| ______________________________________________________________________________ |
| ______________________________________________________________________________ |
| ______________________________________________________________________________ |
| |
| [ Save Local WX Data ] [ Submit ] [ Reset Form ] |
| Form Concept by |
| KF5SMH Ver 1.4 |
+---------------------------------------------------------------------------------------+

Re: Weather Form

Larry Levesque
 

I had to remove a lot of the file load/save and other script functionality for this to work.
Try it out and let me know what you think.

On Tue, Dec 03, 2019 at 10:09:23PM -0500, Ron via Groups.Io wrote:
Hi Larry,

To my rescue again :-) You made a report for the Bucks County's Pandemic
Drill a few years back and man was it a hit.

Attached is the form from Winlink that got me thinking. Hopefully I can send
files to the group.

73, Ron NY3J

On 12/3/2019 9:54 PM, Larry Levesque wrote:
If someone makes a crude drawing of a form with the fields I can create a
custom form

On Tue, Dec 3, 2019 at 9:20 PM Ron via Groups.Io
<rwenig=verizon.net@groups.io <mailto:verizon.net@groups.io>> wrote:

Thanks Michael,

That's what I was thinking. I usually use the WX macro and have the
METAR data pop up. Then copy and paste to an Flmsg. I thought it
would
be cool to have a custom form to enter that information from the
macro
or if someone had a weather station at their QTH then use that data.

73, Ron NY3J

On 12/3/2019 9:05 PM, Michael WA7SKG wrote:
> FWIW, some agencies are gong with a standard METAR format, like
NOAA
> uses for airport weather. It's a quick code format that includes
wind
> speed and direction, current temperature, visibility, cloud
> conditions, barometric pressure, etc.
>
> Michael WA7SKG
>
> Ron via Groups.Io wrote on 12/3/19 12:38 PM:
>> Hi All,
>>
>> During storms in the area we sometimes send out the Storm
Report and
>> Severe WX forms to report conditions. I noticed that Winlink
has just
>> a plain Weather Report form. I was wondering if anyone created a
>> custom form to just report things like the temperature, wind,
>> humidity etc.
>>
>> The custom form process in Flmsg is a nice feature. I just
can't get
>> my HTML skills up enough to design a nice looking form.
>>
>> 73, Ron NY3J
>
>
>




--
Larry Levesque
KA1VGM
Cheshire County EC
NHARES


General Guidelines for Estimating Wind Speeds

+----------------------------------------------------------------+
| 30-44 | Whole trees in motion. Inconvenient walking into the |
| mph | wind. Light-weight loose objects (e.g., lawn |
| (26-39 | furniture) tossed or toppled. |
| kt) | |
|--------+-------------------------------------------------------|
| | Large trees bend; twigs, small limbs break and a few |
| 45-57 | larger dead or weak branches may break. Old/weak |
| mph | structures (e.g., sheds, barns) may sustain minor |
| (39-49 | damage (roof, doors). Buildings partially under |
| kt) | construction may be damaged. A few loose shingles |
| | removed from houses. |
|--------+-------------------------------------------------------|
| 58-74 | Large limbs break; shallow rooted trees pushed over. |
| mph | Semi-trucks overturned. More significant damage to |
| (50-64 | old/weak structures. Shingles, awnings removed from |
| kt) | houses; damage to chimneys and antennas. |
|--------+-------------------------------------------------------|
| | Widespread damage to trees with large limbs down or |
| 75-89 | trees broken/uprooted. Mobile homes may be pushed off |
| mph | foundation or overturned. Roof may be partially |
| (65-77 | peeled off industrial/commercial/ warehouse |
| kt) | buildings. Some minor roof damage to homes. Weak |
| | structures (e.g., farm buildings, airplane hangars) |
| | may be severely damaged. |
|--------+-------------------------------------------------------|
| 90+ | Many large trees broken and uprooted. Mobile homes |
| mph | damaged. Roofs partially peeled off homes and |
| (78+ | buildings. Moving automobiles pushed off the road. |
| kt) | Barns, sheds demolished. |
+----------------------------------------------------------------+

Back to links

+---------------------------------------------------------------------------------------+
| CURRENT LOCAL WEATHER CONDITIONS |
| |
| [ Load Local WX Report Data ] |
|---------------------------------------------------------------------------------------|
| Call sign: __________________ | Observer Name: |
| | _______________________________ |
|-----------------------------------------------------+---------------------------------|
| Date: [ ] | Report Time: (local): [ ] |
|-----------------------------------------------------+---------------------------------|
| Location: | Optional GPS Coordinates: |
| ___________________________________________________ | _______________________________ |
|-----------------------------------------------------+---------------------------------|
| City: _________________________________________ | County: _____________________ |
| State: ___ | |
|---------------------------------------------------------------------------------------|
| Measurements used: [ ] Metric [ ] Imperial |
| |
| Current Condidtions: Check all that apply |
| [ ] SUN [ ] RAIN [ ] THUNDER STORM [ ] HAIL |
| [ ] SNOW [ ] BLIZZARD [ ] TORNADO [ ] HURRICANE |
| [ ] FOG [ ] CLOUDY |
|---------------------------------------------------------------------------------------|
| Temperature [ -- ] °C HUMIDITY: [ -- ] % DEWPOINT [ -- ] °C |
|---------------------------------------------------------------------------------------|
| Barometer _________ millibars Three hour trend [ ] RISING [ ] STEADY [ ] |
| DROPPING |
|---------------------------------------------------------------------------------------|
| Cloud cover description: |
| _______________________________________________________________________ |
|---------------------------------------------------------------------------------------|
| Wind Speed: [ -- ] KM/h |
| [ ] Estimated |
| [ ] Measured Direction From: |
| [ ] Select Direction |
| [ ] North |
| [ ] North East |
| [ ] East |
| [ ] South East |
| [ ] South |
| [ ] South West |
| [ ] West |
| [ ] North West |
| [ ] |
|---------------------------------------------------------------------------------------|
| Wind Gusts: [ -- ] KM/h Wind Gusts MAX: [ -- ] KM/h |
|---------------------------------------------------------------------------------------|
| Rain 1 HR: ___________ millimeters Rain Total: ___________ millimeters |
|---------------------------------------------------------------------------------------|
| Snow 1 HR: ___________ centimeters Snow Total: ___________ centimeters Water |
| Content: ________________ |
|---------------------------------------------------------------------------------------|
| NWS Level: |
| [ ] NONE Issued |
| [ ] ADVISE |
| [ ] WATCH |
| [ ] WARNING _________________________________________ |
|---------------------------------------------------------------------------------------|
| Notes: (optional) |
| |
| ______________________________________________________________________________ |
| ______________________________________________________________________________ |
| ______________________________________________________________________________ |
| ______________________________________________________________________________ |
| |
| [ Save Local WX Data ] [ Submit ] [ Reset Form ] |
| Form Concept by |
| KF5SMH Ver 1.4 |
+---------------------------------------------------------------------------------------+
--
Larry Levesque
KA1VGM

Re: Weather Form

JP
 

Yes, you may use my PDF.

73
Jon, AI1V

Re: Problem with WX report section - followup

Michael WA7SKG
 

First, be certain you are using the latest or at least a recent version of fldigi (I'm using 4.1.08).

The default configuration should be fine. Don't fool with or worry about the URL at all. If you have made any changes in the WX Configuration page, click the DEFAULT button at the end of the URL box, then click SAVE and CLOSE.

For initial testing purposes, simply RIGHT click on an empty macro button. The macro editor will come up. In the Macro Text box, type
<WX:KHSV> . In the Macro Button Label box, type WX, the click Apply, then Close.

You should now see a Macro Button labeled WX. Click that macro button and you should get your weather report in the lower Transmit window. Once you verify that works, you can further edit the macro with your TX and other commands. Create additional macros for your other locations.

The only way I can see that you received the file you referenced is if you intentionally changed the source URL in the WX configuration page. There is no need to change that URL from the default.

HTH,
Michael WA7SKG


Ralph Alden Brigham wrote on 12/5/19 11:40 AM:

     Back again,
     It does _not_work at all for me.  How is it supposed to work, I do not find anything in either documentation file to help me.  Macros are not my friends.
     All I get is some kind of text file from:
! Author: Greg Thompson  NCAR/RAP
!         please mail corrections to gthompsn (at) ucar (dot) edu
! Date: 26 Feb 2018
! This file is continuously maintained at:
! http://www.rap.ucar.edu/weather/surface/stations.txt

Problem with WX report section - followup

Ralph Alden Brigham
 

     Back again,

     It does not work at all for me.  How is it supposed to work, I do not find anything in either documentation file to help me.  Macros are not my friends.

     All I get is some kind of text file from:

! Author: Greg Thompson  NCAR/RAP
!         please mail corrections to gthompsn (at) ucar (dot) edu
! Date: 26 Feb 2018
! This file is continuously maintained at:
! http://www.rap.ucar.edu/weather/surface/stations.txt


  

Re: Weather Form

 

Jon, AI1V, may I use your pdf, modified for Kansas, for my use?

James B Stafford AJ5BS


On Thursday, December 5, 2019, 5:04:22 AM CST, JP <jon.perelstein@...> wrote:


Thank you James - an excellent point.  

For the recent MARS exercise (COMEX), there was supposed to be a requirement that amateurs not use the internet to obtain the weather reports, but rather to either

(a) catch the information over the air from the weather broadcasts transmitted by the airports, or 
(b) visit the airport and get the weather information in person (for purposes of the exercise, it was considered acceptable to get the recorded report by telephone if you were no more than 25 miles from the airport so that people didn't actually have to get in their cars and drive).

I can't guarantee that the requirement was communicated in all parts of the country, or that it was honored in all parts of the country, but it was both communicated and honored in Connecticut.

I wrote up a little document describing how to listen to and interpret airport weather reports given in voice (over the air or by phone) and how to keep an active list of airport weather observation frequencies and phone numbers.  It's at http://www.ctares.org/files/Providing_A_Weather_Observation_To_MARS.pdf.  I personally update my list of phone numbers and frequencies for CT about once a month so that I have it in case of loss of internet communications.

73
Jon, AI1V

Re: Weather Form

 

Bruce, my email is aj5bs@...

James B Stafford


On Thursday, December 5, 2019, 7:24:35 AM CST, BruceN <k4tql@...> wrote:


George N1GB, James AJ5BS,Michael WA7SKG,Ron NY3J

Gentlemen,

I would like to share the info and data you presented here in my AFMARS 4th Communications Wing Newsletter,
properly credited, of course, to share with my MARS compatriots.  If there is no objection, I will share in this weekend's Newsletter.  It does go national but only to MARS members.  I'll share a copy if you will provide me with email addresses to which to send it.

Bruce, K4TQL

Re: Weather Form

Al Massaro
 

Ron, I understand, I spoke with Greg at WINLINK, his statement was "Of course, anyone can take any winlink form and modify it for their use.
We are all volunteers supporting emergency communications."
AL M
KF5SMH

Re: Problem with WX report section

Ron
 

Thanks Dave,

Yep, it did correct the URL without the S. I always knew Fldigi was smarter than I was HIHI.

73, Ron NY3J

On 12/5/2019 12:21 PM, Dave wrote:
The URL is an https site but if you omit the 's' fldigi will correct the URL before sending the inquiry.

https://tgftp.nws.noaa.gov/data/observations/metar/decoded/

is the default on the current distribution version of fldigi.

Dave


Re: Problem with WX report section

Dave
 

The URL is an https site but if you omit the 's' fldigi will correct the URL before sending the inquiry.

https://tgftp.nws.noaa.gov/data/observations/metar/decoded/

is the default on the current distribution version of fldigi.

Dave

Re: Problem with WX report section

Ron
 

Ralph,

There was a change in the WX URL. Here's a screen shot of my setup.



Then change the station ID code to what you want.

73, Ron NY3J

On 12/5/2019 11:37 AM, Ralph Alden Brigham wrote:
	Greetings All,

	Semi-dumb query - how do I get FLdigi to produce a METARS report for a 
local airfield?  I can not get the proper URL to stay in the XML file for FLdigi.

	Also the default URL report is over three years out of date.

	Dave, I am trying to get KHSV, KHUA, and KMDQ to show up - help.

	PS.  Army MARS

-- ***** ---
Ralph Brigham KG4CSQ -- EM64RQ2OOQ
W5YI VE  33080;  ARRL VE
ARRL #1000033463
ARES/RACES SKYWARN
(931) 906-9277
-- ****






Re: Problem with WX report section

Dave
 



or



if the macro is <WX>

In either case the access URL must be as shown above.

Dave

On 12/5/19 10:37 AM, Ralph Alden Brigham wrote:
	Greetings All,

	Semi-dumb query - how do I get FLdigi to produce a METARS report for a 
local airfield?  I can not get the proper URL to stay in the XML file for FLdigi.

	Also the default URL report is over three years out of date.

	Dave, I am trying to get KHSV, KHUA, and KMDQ to show up - help.

	PS.  Army MARS

-- ***** ---
Ralph Brigham KG4CSQ -- EM64RQ2OOQ
W5YI VE  33080;  ARRL VE
ARRL #1000033463
ARES/RACES SKYWARN
(931) 906-9277
-- ****






Problem with WX report section

Ralph Alden Brigham
 

Greetings All,

Semi-dumb query - how do I get FLdigi to produce a METARS report for a
local airfield? I can not get the proper URL to stay in the XML file for FLdigi.

Also the default URL report is over three years out of date.

Dave, I am trying to get KHSV, KHUA, and KMDQ to show up - help.

PS. Army MARS

-- ***** ---
Ralph Brigham KG4CSQ -- EM64RQ2OOQ
W5YI VE 33080; ARRL VE
ARRL #1000033463
ARES/RACES SKYWARN
(931) 906-9277
-- ****

Re: Weather Form

Al Massaro
 

Ron, as the originator of this form I might suggest that you contact the WINLINK folks and get them to weigh in on copying this. Just my thoughts, as far as I am concerned I am honored you find it useful.
AL M
KF5SMH

Re: Weather Form

Ryan Tourge, N2YQT
 

You can also grab weather reports from winlink.


On Thu, Dec 5, 2019 at 9:00 AM George Blakeslee <george.blakeslee@...> wrote:
Re: the event that the internet is down, try this nifty METAR freeware decoding/saving/diglaying tool from NirSoft.net

MetarWeather v1.76 - METAR decoder
Copyright (c) 2003 - 2018 Nir Sofer 


The tool will accept METAR data manually (if you have to copy off the air), or text file (for multiple data METAR data strings), or internet (if it is available). 

The decode can be saved.
The decode can be displayed in a variety of formats.  I like the Vertical HTML which can be cut-and-pasted into a NBEMS Plaintext message.

73  George  N1GB



On Thu, Dec 5, 2019 at 8:24 AM BruceN <k4tql@...> wrote:
George N1GB, James AJ5BS,Michael WA7SKG,Ron NY3J

Gentlemen,

I would like to share the info and data you presented here in my AFMARS 4th Communications Wing Newsletter,
properly credited, of course, to share with my MARS compatriots.  If there is no objection, I will share in this weekend's Newsletter.  It does go national but only to MARS members.  I'll share a copy if you will provide me with email addresses to which to send it.

Bruce, K4TQL



--
George Blakeslee

Re: Weather Form

George Blakeslee
 

Re: the event that the internet is down, try this nifty METAR freeware decoding/saving/diglaying tool from NirSoft.net

MetarWeather v1.76 - METAR decoder
Copyright (c) 2003 - 2018 Nir Sofer 


The tool will accept METAR data manually (if you have to copy off the air), or text file (for multiple data METAR data strings), or internet (if it is available). 

The decode can be saved.
The decode can be displayed in a variety of formats.  I like the Vertical HTML which can be cut-and-pasted into a NBEMS Plaintext message.

73  George  N1GB



On Thu, Dec 5, 2019 at 8:24 AM BruceN <k4tql@...> wrote:
George N1GB, James AJ5BS,Michael WA7SKG,Ron NY3J

Gentlemen,

I would like to share the info and data you presented here in my AFMARS 4th Communications Wing Newsletter,
properly credited, of course, to share with my MARS compatriots.  If there is no objection, I will share in this weekend's Newsletter.  It does go national but only to MARS members.  I'll share a copy if you will provide me with email addresses to which to send it.

Bruce, K4TQL



--
George Blakeslee

Re: Weather Form

George Blakeslee
 

Hi Bruce

Yes, you may share my information and data.
I would be interested in seeing the newsletter.
I sent you a pm from my email address to which you may reply.

73  George  N1GB


On Thu, Dec 5, 2019 at 8:24 AM BruceN <k4tql@...> wrote:
George N1GB, James AJ5BS,Michael WA7SKG,Ron NY3J

Gentlemen,

I would like to share the info and data you presented here in my AFMARS 4th Communications Wing Newsletter,
properly credited, of course, to share with my MARS compatriots.  If there is no objection, I will share in this weekend's Newsletter.  It does go national but only to MARS members.  I'll share a copy if you will provide me with email addresses to which to send it.

Bruce, K4TQL



--
George Blakeslee

Re: Weather Form

Ron
 

Hi Bruce,

I would be interested in the copy of the Newsletter. My email is ny3j at arrl.net.

The conversation about the METAR data was quite informative. Designing a custom Flmsg form to use this data and send it out with Fldigi would be very handy.

73, Ron NY3J

On 12/5/2019 8:24 AM, BruceN wrote:
George N1GB, James AJ5BS,Michael WA7SKG,Ron NY3J

Gentlemen,

I would like to share the info and data you presented here in my AFMARS 4th Communications Wing Newsletter,
properly credited, of course, to share with my MARS compatriots.  If there is no objection, I will share in this weekend's Newsletter.  It does go national but only to MARS members.  I'll share a copy if you will provide me with email addresses to which to send it.

Bruce, K4TQL

Re: Weather Form

BruceN
 

George N1GB, James AJ5BS,Michael WA7SKG,Ron NY3J

Gentlemen,

I would like to share the info and data you presented here in my AFMARS 4th Communications Wing Newsletter,
properly credited, of course, to share with my MARS compatriots.  If there is no objection, I will share in this weekend's Newsletter.  It does go national but only to MARS members.  I'll share a copy if you will provide me with email addresses to which to send it.

Bruce, K4TQL

Re: Weather Form

JP
 

To your point, there can be some significant variance at ground level between locations in different parts of ANY county.  And the topography does not have to be all that diverse to have significant differences - especially during bad weather.  It's not uncommon, for example, to see widely (and wildly) different conditions between NYC's Kennedy airport and LaGuardia Airport even though they are only 10 miles from each other.

As a result, airport weather observations must be taken at the airport and not at someone's QTH miles away.  Also, bear in mind that home weather stations, no matter how advanced, do not measure some of the most important information for pilots such as runway visibility and cloud layers.

73
Jon, AI1V