(NewsNation) — Severe weather is expected to deed the United States connected Wednesday from the Rocky Mountains to the Northeast, putting astir 90 cardinal radical astatine hazard of damaging winds, flash flooding and isolated tornadoes.
The 1,700-mile swath of terrible upwind hazard ranges from Denver to New York City, and cities successful the Rocky Mountains and on the occidental Great Lakes are facing a heightened menace of isolated tornadoes.
The system, a "moisture-rich summer-time airmass," is expected to churn retired thunderstorms resulting in dense rains and flash flooding crossed a important information of the U.S., the National Weather Service estimated.

Wednesday's forecast follows caller flash floods successful New York and New Jersey, which killed 2 people. Subways and streets successful the neighboring states turned into rivers precocious Monday and aboriginal Tuesday pursuing aggravated downpours.
Flooding has besides been a changeless refrain successful the Southern Plains, with more than 130 dead and dozens missing successful cardinal Texas aft a Fourth of July deluge. No rainfall is successful the forecast for Texas' hard-hit Hill Country portion for astatine slightest the adjacent week.
In the tropics, the National Hurricane Center estimates a 40% accidental that a tropical tempest volition develop adjacent the Gulf Coast successful the adjacent 2 days.
If it were to develop, the tempest would beryllium named Dexter. That strategy is expected to dump up to 15 inches of rainfall successful parts of coastal Louisiana.
NewsNation's Anna Kutz contributed to this report.