The NWS 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-V4.04.php?inc=y&z=0 output

https://www.halethorpeweather.com/advforecast2-V5.12.php?inc=y&z=0 output

National Weather Service Forecast for: Halethorpe MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 10:30 pm EDT Sep 14, 2019

Halethorpe, MD
 
Overnight

Overnight: Isolated showers.  Mostly cloudy, with a low around 66. Northwest wind around 5 mph.  Chance of precipitation is 20%.
Isolated
Showers
Sunday

Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 83. North wind around 7 mph.
Decreasing
Clouds
Sunday
Night
Sunday Night: Mostly clear, with a low around 65. Light and variable wind.
Mostly Clear
Monday

Monday: Mostly sunny, with a high near 88. Calm wind becoming west around 6 mph in the afternoon.
Mostly Sunny
Monday
Night
Monday Night: Mostly cloudy, with a low around 64. Calm wind becoming north 5 to 8 mph in the evening.
Mostly Cloudy
Tuesday

Tuesday: Mostly sunny, with a high near 79.
Mostly Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 58.
Mostly Clear
Wednesday

Wednesday: Sunny, with a high near 77.
Sunny
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 58.
Mostly Clear
Lo 66 °F Hi 83 °F Lo 65 °F Hi 88 °F Lo 64 °F Hi 79 °F Lo 58 °F Hi 77 °F Lo 58 °F

 

Overnight
 
Isolated showers. Mostly cloudy, with a low around 66. Northwest wind around 5 mph. Chance of precipitation is 20%.
Sunday
 
Mostly cloudy, then gradually becoming sunny, with a high near 83. North wind around 7 mph.
Sunday Night
 
Mostly clear, with a low around 65. Light and variable wind.
Monday
 
Mostly sunny, with a high near 88. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
 
Mostly cloudy, with a low around 64. Calm wind becoming north 5 to 8 mph in the evening.
Tuesday
 
Mostly sunny, with a high near 79.
Tuesday Night
 
Mostly clear, with a low around 58.
Wednesday
 
Sunny, with a high near 77.
Wednesday Night
 
Mostly clear, with a low around 58.
Thursday
 
Sunny, with a high near 77.
Thursday Night
 
Mostly clear, with a low around 58.
Friday
 
Sunny, with a high near 80.
Friday Night
 
Partly cloudy, with a low around 62.
Saturday
 
Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Halethorpe MD.

National Weather Service Forecast for: Arbutus, MD
Issued by: National Weather Service Baltimore/Washington
Updated: Sat, 14-Sep-2019 10:30pm EDT

Halethorpe, MD
 
  Sunday

Sunday: Isolated Rain Showers then Mostly Sunny
Isolated Rain Showers then Mostly Sunny
Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Mostly Sunny
Mostly Sunny
  Hi 83 °F Hi 88 °F Hi 79 °F Hi 77 °F Hi 77 °F Hi 80 °F Hi 86 °F
 
Overnight

Overnight: Isolated Rain Showers
Isolated Rain Showers
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
 
Lo 66 °F Lo 65 °F Lo 64 °F Lo 58 °F Lo 58 °F Lo 58 °F Lo 62 °F  

 

Overnight
 
Isolated rain showers. Mostly cloudy, with a low around 66. Northwest wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday
 
Isolated rain showers before 8am. Mostly sunny, with a high near 83. Northwest wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
Mostly clear, with a low around 65. Northwest wind 1 to 5 mph.
Monday
 
Mostly sunny, with a high near 88. West wind 1 to 6 mph.
Monday Night
 
Mostly cloudy, with a low around 64. North wind 2 to 9 mph.
Tuesday
 
Mostly sunny, with a high near 79.
Tuesday Night
 
Mostly clear, with a low around 58.
Wednesday
 
Sunny, with a high near 77.
Wednesday Night
 
Mostly clear, with a low around 58.
Thursday
 
Sunny, with a high near 77.
Thursday Night
 
Mostly clear, with a low around 58.
Friday
 
Sunny, with a high near 80.
Friday Night
 
Partly cloudy, with a low around 62.
Saturday
 
Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Arbutus, MD.