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Flash flood alerts extended, Tropical Wave remains across Jamaica

19 June 2017

Another very moist airmass will move into western and central NY on Sunday with a potential for training heavy thunderstorms from the western Southern Tier across the Genesee Valley and western Finger Lakes to the eastern Lake Ontario region. These storms could become severe as they move into central NY later this afternoon and evening. A Flash Flood Watch will begin at 2:00 for Southern Erie, Chautauqua, Cattaraugus, Allegany and Wyoming Counties.

The National Weather Service in Albany, N.Y. and Taunton, Mass. issued the watch on Sunday morning, warning that widespread showers and thunderstorms with areas of torrential rainfall are expected during the afternoon to evening Monday.

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Stormy weather is predicted for much of upstate NY later Sunday, and with that, some areas could see heavy rains with the potential to cause flooding.

The Met Service says atmospheric conditions will remain unstable and deteriorating weather conditions are expected to persist across the island through to tomorrow morning. There is also an enhanced risk for some thunderstorms to become severe, with strong wind gusts exceeding 58 miles per hour and large hail.

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Urban street flooding may result from clogged storm drains.

The greatest threat from these storms will be gusty, damaging winds along with hail and very heavy rain. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. Still, Brown said thunderstorms could produce additional rainfall and unsafe winds in all areas.

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