New York Minor Flood Advisory | Effective 08/20/2026 15:56

Headline: 
Flood Advisory issued August 20 at 6:56PM EDT until August 20 at 9:00PM EDT by NWS Upton NY
Event: 
Flood Advisory
Urgency: 
Expected
Effective: 
August 20, 2026 - 3:56pm
Expires: 
August 20, 2026 - 6:00pm
Description: 
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Suffolk County in southeastern New York... * WHEN...Until 900 PM EDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 656 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 inch of rain has fallen. - Additional rainfall amounts of 1 to 1.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Islip, Brentwood, Commack, Huntington Station, Centereach, Shirley, Deer Park, Lindenhurst, Medford, Hauppauge, Ronkonkoma, Huntington, Manorville, Stony Brook, Babylon, Patchogue, Middle Island, Port Jefferson, Wading River and Center Moriches. - http://www.weather.gov/safety/flood
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
Suffolk, NY
Forcast Office: 
NWS Upton NY
Sender: 
w-nws.webmaster@noaa.gov