Severe flash flooding is likely in areas where the heaviest rainfall occurs, said the NWS.

HUDSON VALLEY, NY — Flood watches are in effect Sunday, as the National Weather Service predicted severe storms possible and widespread rainfall amounts of 1 to 3 inches and localized amounts of 4 to 6 inches over a 24-hour period.

SEE:

• 16K Without Power Sunday AM In The Hudson Valley
• Tornado Watch Issued For Putnam, Westchester, Long Island

By daybreak, almost 16,000 customers were without power in Dutchess, Orange, Putnam, Rockland, Ulster and Westchester counties.

Locally severe flash flooding is possible too, the NWS said. SEE: Flash Flood Warning Sunday AM For Northern Westchester, Eastern Putnam

"Cannot rule out the potential for a few isolated spots receiving 7+ inches," the NWS said in a 3:37 a.m. flood watch update for Orange, Putnam, Rockland and Westchester counties. "Localized significant flooding remains likely in areas where the heaviest rainfall occurs."

Showers and thunderstorms are expected to develop across the region today. Multiple rounds of showers, including training of thunderstorms, are likely.

An earlier tornado warning for Ulster County was lifted as the tornado dissipated. You can read posts about it on Hudson Valley Weather.

"The latest trend for heaviest rainfall currently is over southeastern New England. Projections for 6”’ to as much as 10” or more of rainfall. We aren’t out of the threat for significant rainfall," Bruce Furbeck of First Due Weather said early Sunday morning. "Keep alert for the potential for major flooding."

Rainfall rates could hit 1 to 2 inches per hour, leading to excessive runoff, the NWS said. "Excessive runoff may result in flashier small streams, rivers, and creeks rising out of their banks, especially across areas that have been impacted by significant flooding over the last week."

Creeks and streams may rise out of their banks.

"Flash Flooding is bad at any time of day, but at night, it’s even worse as you can not see the rapid rise in water," said Todd Snow of Hudson Valley Weather.

The flood watch for Orange, Putnam, Rockland and Westchester counties now extends from midnight to midnight Sunday. The flood watch for Dutchess and Ulster starts at 2 a.m. Sunday and ends at 2 a.m. Monday.

The region was saturated from Sunday's storms, which killed one and caused millions of dollars in damage. SEE: Hochul Requests Federal Disaster Aid For HV Storm Recovery

Then storms hit again Thursday afternoon and evening, dropping 4 more inches on West Point, which had suffered severe flood damage from 8 inches of rain Sunday, and 3 more inches of rain on Mahopac, which also was hit by 8 inches of rain Sunday.

Here are the town-by-town rain totals from the NWS from Thursday afternoon to 3:47 p.m. Friday.

Orange County

• US MILITARY ACADEMY 3.86 inches
• CHESTER 2.28
• 4 SSE CHESTER 2.02
• MIDDLETOWN 1.98
• 2.6 NW TUXEDO PARK 1.76
• CORNWALL ON HUDSON 1.75
• HARRIMAN 1.65
• MONTGOMERY 1.48
• WASHINGTONVILLE 1.48
• WARWICK 1.47
• WARWICK 3.9 W 1.46
• GREENWOOD LAKE 1.12
• VAILS GATE 1.03

Putnam County

• MAHOPAC 3.29 inches
• LAKE CARMEL 1.68
• PUTNAM VALLEY 1.37
• COLD SPRING 1.29
• CARMEL HAMLET 1.16

Westchester County

• HARRISON 2.08 inches
• SHRUB OAK 1.45
• PEEKSKILL 1.44
• PEEKSKILL 0.4 N 1.34
• SOMERS 1.33
• RYE 1.28
• NEW ROCHELLE 1.27
• RYE BROOK 1.24
• MOUNT KISCO 1.12

Here's the next 48 hours at a glance based on Orange County:

SEE ALSO:

• 16K Without Power Sunday AM In The Hudson Valley
• Orange County Under Extra Flood Advisory Till 8:45AM
• Flash Flood Warning Sunday AM For Northern Westchester, Eastern Putnam
• HV Flood Timeline July 9-10: People Trapped, Flooded Vehicles, Roads Collapse
• Hochul Requests Federal Aid For HV July 9 Storm Recovery