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Flood Advisory

◍ Suffolk, NY · USA · updated 8/21/2026, 6:30:00 AM
⏱ In effect until 5:30 AM UTC-4
Severity score
45/100
Confidence
High
Why this matters

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Central and Eastern Suffolk County in southeastern New York... * WHEN...Until 530 AM EDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Ponding of water in urban or other areas is occurring or is imminent. * ADDITIONAL DETAILS... - At 228 AM EDT, Doppler radar indicated heavy rain. Minor flooding is ongoin

Key stats
Severity
Minor
Certainty
Likely
Urgency
Expected
Severity over time
Timeline
  1. Flood Advisory
    8/21/2026, 6:30:00 AM
    Flood Advisory issued August 21 at 2:30AM EDT until August 21 at 5:30AM EDT by NWS Upton NY
Sources & attribution
OfficialNWS NWS Upton NYupdated 8/21/2026, 6:30:00 AM
⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.