NAM sea-level pressure forecast trend
Notes:
The data on this slide shows several sea-level pressure forecasts from the NAM valid at 00 UTC on the 27th. The earliest forecast, made at 18z on the 25th , is shown in the lower right, while the latest forecast, made at 00z on the 27th is in the upper left. The model forecasts appeared to be quite consistent during this time, with just a slight northward trend with the surface low position.
Slide 12