Observed radar – 12z 15th
Notes:
By 12 UTC the band east of Lake Erie had weakened across northern Pennsylvania, while the Lake Ontario band was quite strong and was beginning to shift south of Lake Ontario. As before, the inland extent of the Lake Ontario band was large, with the band extending to central Vermont. Between 12 UTC and 18 UTC, the band south of Lake Ontario moved south and rapidly dissipated, while a second band developed over Lake Ontario by 18 UTC.
Slide 14