Adelphia Warnings, Watches and Advisories

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 Adelphia.

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

Heat Advisory issued May 20 at 3:27AM EDT until May 20 at 8:00PM EDT by NWS Mount Holly NJ

* WHAT...Heat index values up to 93 degrees expected. * WHERE...In New Jersey, Morris, Somerset, Warren, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Northampton, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Maximum heat indices near 95 degrees during peak heating this afternoon. Given the intensity of this early season stretch of heat and humidity, we are not fully acclimated to it and therefore impacts could be greater if precautions are not taken. Showers and some thunderstorms arrive this afternoon and evening which will end this early season heat.

Heat Advisory issued May 20 at 3:27AM EDT until May 20 at 8:00PM EDT by NWS Mount Holly NJ

* WHAT...Heat index values up to 98 degrees expected. * WHERE...Western Monmouth, Middlesex, Ocean, and Southeastern Burlington Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Maximum heat indices near 100 degrees during peak heating this afternoon. Given the intensity of this early season stretch of heat and humidity, we are not fully acclimated to it and therefore impacts could be greater if precautions are not taken. Showers and some thunderstorms arrive later this afternoon and evening which will end this early season heat.

Heat Advisory issued May 20 at 3:27AM EDT until May 20 at 8:00PM EDT by NWS Mount Holly NJ

* WHAT...Heat index values up to 97 degrees expected. * WHERE...In Delaware, New Castle County. In New Jersey, Mercer, Camden, Gloucester, and Northwestern Burlington Counties. In Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, and Philadelphia Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Maximum heat indices near 100 degrees during peak heating this afternoon. Given the intensity of this early season stretch of heat and humidity, we are not fully acclimated to it and therefore impacts could be greater if precautions are not taken. Showers and some thunderstorms arrive later this afternoon and evening which will end this early season heat.

Heat Advisory issued May 20 at 2:17AM EDT until May 20 at 8:00PM EDT by NWS Upton NY

* WHAT...Heat index values in the middle 90s expected. * WHERE...Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern Union, Hudson, Western Bergen, Western Essex, Western Passaic, and Western Union Counties. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses.