500 mb heights and vorticity, sea level pressure, 1000-500 mb thickness and NAM80 QPF
Notes:
The large-scale pattern on the 18th indicated that there would be the potential for some lake effect snow across central New York. Mid-level through surface flow was from the northwest. No significant mid-level short waves can be seen on the 500 mb chart on the left, however the large-scale sea-level pressure pattern on the right indicated the potential for an east-west oriented surface trough to drop south across central New York during the morning hours, which could possibly enhance the snowfall.
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Slide 4