Surface plot - 23z
Notes:
This surface analysis at 23z on the 27th showed a pronounced pre-frontal trough over western New York. Temperatures on either side of the trough were generally in the lower to mid 70s, with dew points generally in the mid to upper 50s. A pronounced wind shift can be seen with the trough, from southerly ahead of the trough to southwesterly behind the trough.
Slide 5