Author Topic: Surface Analysis Symbology  (Read 243 times)

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Offline Patrol_Pilot

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Surface Analysis Symbology
« on: September 09, 2023, 08:11:01 AM »
New guy; nice to know there are some other Aviation WX Nerds out there. I just passed my 50th year as a pilot, still flying professionally. I spend a bunch of my time mentoring aviators starting their careers, especially in that weather briefings are not as they were when I started. I know I will be asked this, but I don't have an answer.

In today's 09Z Analysis Chart, I see a short, green-colored cold front symbol. I've not seen green before; is there any significance to the color?





I have seen where black lines were used to describe an outflow boundary and found that in an old publication, but green is new to me.


Offline weatherdoc

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Re: Surface Analysis Symbology
« Reply #1 on: September 10, 2023, 07:06:03 AM »
What website did this image come from? Was it an NWS site (noaa.gov) or commercial?

Offline Patrol_Pilot

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Re: Surface Analysis Symbology
« Reply #2 on: September 10, 2023, 07:22:30 AM »
Leidos Flight Service, 1800WXBrief.com

Offline weatherdoc

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Re: Surface Analysis Symbology
« Reply #3 on: September 10, 2023, 09:45:19 AM »
Maybe Leidos is custom creating the maps using their own color scheme?

Offline CW2274

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Re: Surface Analysis Symbology
« Reply #4 on: September 10, 2023, 04:37:51 PM »
Maybe Leidos is custom creating the maps using their own color scheme?
Highly unlikely, as Leidos is contracted by the FAA for FSS duties, so they must use standard FAA/NWS symbology. Never saw green for a cold front, let alone it's not in a realistic position. Perhaps some weird typo.

Offline weatherdoc

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Re: Surface Analysis Symbology
« Reply #5 on: September 11, 2023, 05:59:40 AM »
Yeah, I know they are supposed to use standard symbology, but look at this morning's 06Z analysis. There's an outflow boundary in Texas and the symbol and color is different when comparing Leidos to NOAA WPC. Leidos is depicting it as a dashed black line and WPC as a dot-dash red line. Still not sure about that green cold front though!

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Offline TheBushPilot

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Re: Surface Analysis Symbology
« Reply #6 on: September 11, 2023, 07:53:48 PM »
Looks to be a boundary. Interesting choice of identification they went with. Never seen that before.

Here's the WPC surface analysis of the same day/hour.



Even more interesting that they do explicitly map boundaries on their surface chart. Wonder why the green one is different? :???:
« Last Edit: September 11, 2023, 07:55:46 PM by TheBushPilot »
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