A follow up thread to illustrate how sensitive #Hurricane #Simon's initial position to the col or "saddle point" was to its track. Compare forecasts of GFS & ECMWF w/ these steering diagnostics via weathernerds.org. GFS S of saddle & moves TC ↙️ ECMWF N of saddle & moves TC ↗️
#Hurricane #Simon's track forecast today is exhibiting large uncertainty, related to it entering a COL in the steering flow or "saddle point". Here, small shifts in its initial position can result in very different track solutions. A visual helps explain things better👇