FAQ: Models, Z-Time, etc., What is Z-Time? How To Read Model? 06&18Z? Options

[WeatherMatrix]

Please continue to post model interpretation links here. Note that there is a different thread about Model Times and a different thread on where to find Models.

[jdc123]

I was searching for some how-to's on reading the GFS etc and stumbled on this simple description. It's VERY basic but I thought if someone else was just starting to learn like me, it could be useful.


Step1
Download NCEP Weather Model and Forecast site. On there you will see a number of options. We are focusing on the GFS and NAM.

Step2
The GFS is a long range model, going out to over 300 hours. The NAM is used in the shorter term going out 84 hours. On each one you will see O Z, 6Z, 12Z and 18Z. This is the time they run the model, each runs four times a day.

Step3
Scroll down the page and click on an hour. The best option is to click on fine and then the 850 MLB and 6 hr Precip. A map should then appear.

Step4
On that map there will be a number of graphics, but if you are searching for a storm look for green. The amount of precip is broken down by color. As you move from light green to blue to purple that represents light to heavy precip.

Step5
If you are seeking out a snow storm, you must look for the O line. It will be a blue line labeled 0. If any blue line is to your south and precip is showing up that will likely be something in the frozen state. The orange line is heat and means rain.

Step6
Scroll through the models and check out what the week will bring.

[lyra]

nice shot men....

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