Merion Warnings, Watches and Advisories

When a severe thunderstorm warning is issued, the storm may produce damaging winds, large hail, dangerous lightning, and heavy rain. In some cases, heavy rainfall produced by a severe storm can also lead to flash flooding. Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Merion.

Use the Radar Maps link provided to understand the trajectory of a storm.

Severe Thunderstorm Warning issued August 17 at 6:45PM EDT until August 17 at 7:30PM EDT by NWS Mount Holly NJ

SVRPHI The National Weather Service in Mount Holly NJ has issued a * Severe Thunderstorm Warning for... Northwestern New Castle County in northern Delaware... Central Chester County in southeastern Pennsylvania... Southwestern Delaware County in southeastern Pennsylvania... * Until 730 PM EDT. * At 643 PM EDT, a severe thunderstorm was reported near Honey Brook and Glenmoore and moving southeast at 30 mph. * HAZARD...60 mph wind gusts. * SOURCE...Radar indicated. * Locations impacted include... Coatesville, Parkersburg, Thorndale, Bowington, Marshallton, Chester, West Chester, Exton.