Summary
- A strong mid-to-upper level trough moved east from the Great Lakes on June 30th.
- A weak surface low pressure area developed downstream from the trough over central New York with a warm front extending southeast toward the mid-Atlantic coast.
- Low-level southerly flow ahead of this system became anomalously large over the eastern half of New York.
- Forecasters were keying on severe weather potential over flash flood potential prior to the event.
Slide 11