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Flood Warning

◍ Allegheny, PA · USA · updated 8/20/2026, 4:51:00 PM
⏱ In effect until 3:45 PM UTC-4
Severity score
65/100
Confidence
High
Why this matters

* WHAT...Flooding caused by excessive rainfall is occurring. * WHERE...Allegheny County in southwestern Pennsylvania... Western Fayette County in southwestern Pennsylvania... Northeastern Greene County in southwestern Pennsylvania... Central Washington County in southwestern Pennsylvania... Southwestern Westmoreland County in southwestern Pennsylvania... South Central Beaver County in western Pen

Key stats
Severity
Severe
Certainty
Likely
Urgency
Expected
Timeline
  1. Flood Warning
    8/20/2026, 4:51:00 PM
    Flood Warning issued August 20 at 12:51PM EDT until August 20 at 3:45PM EDT by NWS Pittsburgh PA
Sources & attribution
OfficialNWS NWS Pittsburgh PAupdated 8/20/2026, 4:51:00 PM
OfficialNWS NWS Pittsburgh PAupdated 8/20/2026, 4:43:00 PM
⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.