Active AlertsRockville Centre, NY

Tornado Warning

Issued at Thu 6:49 PM Aug. 20
Issued by: National Weather Service
Recommended Action
TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. Motorists should not take shelter under highway overpasses. If you cannot safely drive away from the tornado, as a last resort, either park your vehicle and stay put, or abandon your vehicle and lie down in a low lying area and protect yourself from flying debris.
Full details 

Flash Flood Warning

Issued at Thu 6:13 PM Aug. 20
Issued by: National Weather Service
Description

The National Weather Service in Upton has issued a Flash Flood Warning for Bronx County in southeastern New York Kings (Brooklyn) County in southeastern New York Nassau County in southeastern New York Queens County in southeastern New York Until 815 PM EDT. At 613 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1 inch of rain has fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts of 1 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.
Hazard: Flash flooding caused by thunderstorms.
Source: Radar indicated.
Impact: Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include Jamaica, Flushing, Levittown, East Tremont, Freeport, Valley Stream, Long Beach, Glen Cove, Plainview, Garden City, Massapequa, Lynbrook, Syosset, Mineola, Woodmere, Westbury, Rockaway Beach, Great Neck, Farmingdale and Oyster Bay.

Recommended Action

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Flood Watch

Issued at Thu 2:16 PM Aug. 20
Issued by: National Weather Service
Description

What: Flooding caused by excessive rainfall continues to be possible.
Where: Portions of northeast New Jersey, including the following areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic and Western Union and southeast New York, including the following areas, Bronx, Kings (Brooklyn), New York (Manhattan), Northern Nassau, Northern Queens, Northwest Suffolk, Richmond (Staten Island), Southern Nassau, Southern Queens, Southern Westchester and Southwest Suffolk.
When: Until 2 AM EDT Friday.
Impacts: Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas.
Additional Details: - A period of heavy rainfall is possible as showers and a few thunderstorms move through the area late this afternoon and evening. Peak hourly rainfall rates could reach 2 to 2.5 inches. Average rainfall amounts are expected to be between 1.5 and 2.5 inches with locally higher amounts possible. - http://www.weather.gov/safety/flood

Recommended Action

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Advisory

Issued at Thu 5:30 PM Aug. 20
Issued by: National Weather Service
Description

What: Flooding caused by excessive rainfall is expected.
Where: Bergen County in northeastern New Jersey Essex County in northeastern New Jersey Hudson County in northeastern New Jersey Eastern Passaic County in northeastern New Jersey Union County in northeastern New Jersey Bronx County in southeastern New York Kings (Brooklyn) County in southeastern New York Western Nassau County in southeastern New York New York (Manhattan) County in southeastern New York Queens County in southeastern New York Richmond (Staten Island) County in southeastern New York Southern Westchester County in southeastern New York
When: Until 730 PM EDT.
Impacts: Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas.
Additional Details: - At 530 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.5 and 1.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include Newark, Jersey City, Jamaica, Yonkers, Paterson, Elizabeth, Flatbush, New Rochelle, Flushing, Passaic, Bayonne, White Plains, Wayne, Mott Haven, Hoboken, Plainfield, Bloomfield, East Tremont, Hackensack and Linden. - http://www.weather.gov/safety/flood

Recommended Action

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.

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