Flash Flood Warning Issued for Allegheny, Washington, Westmoreland Counties PA
This alert is no longer in effect.
NOAA issued it on August 5, 2026, 2 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Pittsburgh has issued a Flash Flood Warning for Allegheny, central Washington and northwestern Westmoreland counties in southwestern Pennsylvania until 10 PM EDT August 5.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Southwestern Pennsylvania
- Issued
- August 5, 2026
- Issuing authority
- NWS Pittsburgh PA
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 2 weeks ago; use the issuing agency's live warning service for current conditions in Southwestern Pennsylvania.
Alert Details
Flash Flood Warning issued by NWS Pittsburgh PA. Effective from 6:53 PM EDT August 5, 2026 until 10:00 PM EDT August 5, 2026. Severity: Severe. Urgency: Immediate. Certainty: Likely.
Affected Areas
Allegheny County in southwestern Pennsylvania, central Washington County in southwestern Pennsylvania, northwestern Westmoreland County in southwestern Pennsylvania. Specific locations include Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Ross Township, McCandless Township, Monroeville, McMurray, McKeesport, Canonsburg, Gastonville, Shaler Township, Plum, West Mifflin, North Side Pittsburgh, Baldwin, Upper St. Clair, Hampton Township and Scott Township.
What You Should Do
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.
Expected Conditions
Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 1 inch of rain has fallen. Additional rainfall amounts of 1 to 2 inches are possible. 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.
Timeline
Alert effective August 5 at 6:53 PM EDT and expires August 5 at 10:00 PM EDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,435 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 5, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.