The National Weather Service Forecast Office in Mount Holly, NJ will be conducting a required, scheduled update to their Advanced Weather Interactive Processing System (AWIPS) system from 8 AM EDT Tuesday, May 13, 2025 through approximately 5 PM EDT Thursday, May 15, 2025. The NWS uses the AWIPS computer system to display and integrate weather and water information, and to send life-saving information, such as weather and water warnings, to the public.

During the time of the update, forecast operations will be conducted by the National Weather Service Forecast Office in New York, NY (Upton, NY) to minimize any potential interruption to services. No impacts to our core services of forecast products and weather watches, warnings and advisories are expected during this period. However, limited impacts will occur to the following services: 

• All NOAA Weather Radio Transmitters maintained by NWS Philadelphia/Mount Holly will be off the air through the time of the install. This includes the following transmitters: Hibernia Park, PA; Philadelphia, PA; Allentown, PA; Sudlersville, MD; Lewes, DE; Southhard/Howell Township, NJ; Hardyston, NJ; and Atlantic City, NJ

• Tidal water level forecast services will be updated less frequently through this period. Forecasts will remain available at water.noaa.gov/wfo/phi and www.weather.gov/erh/coastalflood?wfo=phi 

• Local graphical forecast maps that are hosted in various places on www.weather.gov/phi will not be updated. This includes all maps on the Graphical Hazardous Weather Outlook page ( https://www.weather.gov/erh/ghwo?wfo=phi).

The forecast office in Mount Holly, NJ will remain open and staffed throughout this period for public and partner phone calls and additional functions that can be completed without AWIPS.

If you have any questions, please contact Sarah Johnson, Warning Coordination Meteorologist, by email at sarah.johnson@noaa.gov or by phone at (609) 261-6602 extension 223.