Daweathablog

Charles E. Roop giving his own forecasts, weather discussions, photos and adventures for the Starkville, MS area, Florida, and beyond.

Tuesday, September 14, 2010

Forecasting Contest - Atlanta Forecast for Wednesday 09/15

Current visible satellite imagery shows mostly clear skies over northern Georgia with temps running in the upper 80s across the area. Surface analysis shows the high pressure in extreme eastern North Carolina. Winds are light and variable for the area, as well.

Some of the models are indicating the high to start to move off the North Carolina coast sometime tomorrow, bringing more a east to southeast flow. Temps should be a little warmer. Otherwise, not much of a change to the status quo.

Tonight's low temp prediction is something I find slightly tricky with the MOS GFS going for 59 and the MOS NAM shooting for 66. The NAM is predicting a little more moisture than the GFS, which could be the reason for the discrepancies. There is not much of a wind flow expected at 1000 mb at 12 Z (8 a.m. EDT), so any moisture or temp advection is a little hard to determine. I think I will stick with current trends from today and may call for a slightly warmer low than this morning. Tonight, expect mostly clear conditions in Atlanta with a low near 63.

Wednesday should be more of the same with mostly sunny skies with a high near 90. There should be more of a southeasterly flow during the day, so my predicted high slightly above MOS guidance.

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