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米国北東部と中西部で豪雨や雷雨による洪水リスクが高まる

Across various regions in the United States and abroad, active and unsettled weather patterns are driving increased risks of flooding, thunderstorms, and heavy rainfall.

米国北東部と中西部で豪雨や雷雨による洪水リスクが高まる

Across various regions in the United States and abroad, active and unsettled weather patterns are driving increased risks of flooding, thunderstorms, and heavy rainfall. From the Northeast to Texas and the Gulf Coast, meteorologists and official agencies are tracking multiple systems that threaten to impact saturated ground and vulnerable infrastructure.

Northeast and Midwest Rainfall Risks

Northeast and Midwest Rainfall Risks

The Northeast continues to face an active weather pattern as heavy rain and thunderstorms return, raising the risk of flash flooding in areas still recovering from recent historic rainfall. On Saturday, a low-pressure system moving through the Ohio Valley and the southern Great Lakes was pushed east by an advancing cold front. As deep moisture from the Atlantic Ocean surges northward into the system, widespread rain and thunderstorms are developing, bringing heavy downpours from southern Ohio into Pennsylvania and western and central New York. By Sunday afternoon, slow-moving storms may repeatedly track over the same areas, further increasing the risk of flash flooding.

In Greater Cincinnati, the National Weather Service in Wilmington reported that isolated thunderstorms and locally heavy rain were expected Tuesday, July 7, 2026. Storms in the region could produce frequent lightning and isolated strong wind gusts. Rainfall totals of up to 2 inches could increase the risk of flooding, with the Weather Prediction Center forecasting a slight risk of severe thunderstorms and excessive rainfall for areas south of I-70 on Friday, July 10.

Flash Flood Warnings in Central Indiana

In central Indiana, the focus shifted to flooding on August 14, 2026, as another round of showers and thunderstorms moved through the region. Krista McEnany reported that areas that picked up several inches of rain over the past few days were especially vulnerable. Numerous counties, including Fountain, Greene, Parke, Vermillion, and Vigo, faced Flash Flood Warnings. While rain was expected to ease, the forecast allowed for an additional 0.5 to 0.75 inches of rain in Indianapolis, with some northern counties having already recorded 1 to 2 inches since midnight. A Flood Watch remained in effect through the night due to saturated ground and swollen waterways.

Gulf Coast and Florida Forecasts

Gulf Coast and Florida Forecasts

In Florida, heavy rain and thunderstorms are expected to soak the Gulf Coast through the weekend. As of July 17, 2026, an area of low pressure was lingering over the region. The National Hurricane Center highlighted a kidney bean-shaped area stretching from the northern Gulf across the Big Bend and North Florida into the Atlantic, though the probability of tropical cyclone formation remained low. The Weather Prediction Center forecasted 2 to 3 inches of rain across much of the region through Monday, with isolated totals of up to 7 inches possible in the greater Tampa Bay area. Areas from Panama City through Cedar Key were also projected to receive up to 3 inches of rain.

米国北東部と中西部で豪雨や雷雨による洪水リスクが高まる
Photo: Texasstormchasers

Texas and International Outlook

Texas and International Outlook

Texas has entered an unsettled weather pattern for the work week, characterized by a summer-style setup of pop-up showers and thunderstorms. The state is no longer parked under a strong upper-level ridge of high pressure, or “heat dome,” which typically brings sinking air and lower rain chances. Instead, enough moisture and instability exist for storms to bubble up, particularly during the afternoon hours. These storms are expected to bring lightning, gusty winds, and heavy downpours, leading to localized flooding issues where storms sit or repeat.

A man and a woman walk through torrential rain while holding umbrellas
Photo: bbc.co.uk

Internationally, the United Kingdom is also expecting a shift in conditions. According to weather reports, low pressure arriving from the south-west will bring showery conditions to parts of southern England and south Wales by Tuesday. By Wednesday, downpours are expected to become more widespread across England, Wales, and Northern Ireland. From later Wednesday until Friday, the threat of torrential downpours, hail, and thunderstorms will increase, particularly in southern England and Wales, where heavy rain falling on dry and hard ground may create a risk of localised flooding.

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