Tuesday, October 23, 2007

Mmm... Spaghetti

A spaghetti plot is a meteorological method of viewing data from many different models. Yesterday at noon and again this morning I made a spaghetti plot of the potential storm track of an area of low pressure that could impact us by Friday. I drew on the paths that three different models believed this rainmaker would take. The light pink line is the ECMWF model, the red line is the GFS model, and the hot pink line is the NAM model.

When looking at spaghetti plots a forecaster would like to see a recognizable pattern. This would show agreement between the different pieces of data and typically increase the confidence in a believed scenario. When the different models disagree distinctively (like yesterday at noon) the plot resembles a plate of spaghetti, with lines strewn everywhere.

The graphic above is the plot I built this morning. It shows that the models are starting to come together a bit more. This is making me believe that our chances for rain on Friday and Saturday are fairly good, which is why raindrops were added to the 7 day outlook for those corresponding days this morning. -ADAM

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