Compare old:new forecasts

The National Weather Service is in the process of changing over the forecast system to a new method, known as API (Application Programming Interface). In the mean time both are available and sometimes the new one (API) comes up with errors. So this is a side-by-side comparison of the two methods.

https://www.halethorpeweather.com/advforecast2-V4.05.php?inc=y&z=0 output

https://www.halethorpeweather.com/advforecast2-V5.20.php?inc=y&z=0 output

National Weather Service Forecast for: Halethorpe MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.

Updated: 5:29 pm EDT Aug 16, 2026

Halethorpe, MD

Tonight Low: 71 °F	Monday High: 89 °F	Monday Night Low: 70 °F	Tuesday High: 87 °F	Tuesday Night Low: 68 °F	Wednesday High: 89 °F	Wednesday Night Low: 71 °F	Thursday High: 86 °F	Thursday Night Low: 67 °F
T-storms then Showers	Mostly Sunny then Chance T-storms	Chance T-storms then Partly Cloudy	Sunny	Mostly Clear	Sunny	Slight Chance T-storms	Slight Chance Showers then Showers Likely	Showers Likely then Chance Showers

Hazardous Weather Outlook

Tonight	Showers and thunderstorms before 2am, then a chance of showers. Low around 71. Southwest wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday	A chance of showers and thunderstorms after 2pm. Sunny, then becoming partly sunny during the afternoon, with a high near 89. Northwest wind 5 to 8 mph. Chance of precipitation is 30%.
Monday Night	A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.
Tuesday	Sunny, with a high near 87. North wind 5 to 7 mph.
Tuesday Night	Mostly clear, with a low around 68. Calm wind.
Wednesday	Sunny, with a high near 89.
Wednesday Night	A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Thursday	A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Thursday Night	Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday	A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Friday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Saturday	A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Saturday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunday	A slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Halethorpe MD.

National Weather Service Forecast for: Arbutus, MD
Issued by: National Weather Service Baltimore/Washington

Updated: Sun, 16-Aug-2026 5:29pm EDT

Halethorpe, MD

This Afternoon Chance Showers And T-Storms	Monday Mostly Sunny then Chance Showers And T-Storms	Tuesday Sunny	Wednesday Sunny	Thursday Slight Chance Showers And T-Storms	Friday Partly Sunny then Slight Chance Showers And T-Storms	Saturday Chance Rain Showers then Slight Chance Showers And T-Storms
Hi 79 °F	Hi 89 °F	Hi 87 °F	Hi 89 °F	Hi 86 °F	Hi 80 °F	Hi 83 °F

Tonight Showers And T-Storms	Monday Night Chance Showers And T-Storms then Partly Cloudy	Tuesday Night Mostly Clear	Wednesday Night Slight Chance Showers And T-Storms	Thursday Night Showers And T-Storms Likely	Friday Night Chance Showers And T-Storms	Saturday Night Slight Chance Showers And T-Storms then Chance Showers And T-Storms
Lo 71 °F	Lo 70 °F	Lo 68 °F	Lo 71 °F	Lo 67 °F	Lo 66 °F	Lo 67 °F

This Afternoon	A chance of showers and thunderstorms. Cloudy, with a high near 79. South wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight	Showers and thunderstorms before 4am. Mostly cloudy, with a low around 71. South wind 5 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday	A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. West wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday Night	A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. Northwest wind around 6 mph. Chance of precipitation is 30%.
Tuesday	Sunny, with a high near 87. Northwest wind around 7 mph.
Tuesday Night	Mostly clear, with a low around 68.
Wednesday	Sunny, with a high near 89.
Wednesday Night	A slight chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Thursday	A slight chance of showers and thunderstorms before 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Thursday Night	Showers and thunderstorms likely before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday	A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Friday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Saturday	A chance of rain showers before 2pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Saturday Night	A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

Forecast from NOAA-NWS for Arbutus, MD.