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: 12:34 am EST Jan 19, 2020

Halethorpe, MD
 
Overnight

Overnight: Scattered showers before 4am.  Mostly cloudy, with a low around 32. Southwest wind around 11 mph, with gusts as high as 18 mph.  Chance of precipitation is 40%.
Scattered
Showers
Sunday

Sunday: Mostly sunny, with a high near 38. West wind 13 to 17 mph, with gusts as high as 28 mph.
Mostly Sunny
Sunday
Night
Sunday Night: Mostly clear, with a low around 21. Northwest wind 13 to 15 mph, with gusts as high as 24 mph.
Mostly Clear
M.L.King
Day
M.L.King Day: Sunny, with a high near 33. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Sunny
Monday
Night
Monday Night: Mostly clear, with a low around 20. Northwest wind 7 to 9 mph.
Mostly Clear
Tuesday

Tuesday: Sunny, with a high near 35.
Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 22.
Mostly Clear
Wednesday

Wednesday: Sunny, with a high near 41.
Sunny
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 24.
Mostly Clear
Lo 32 °F Hi 38 °F Lo 21 °F Hi 33 °F Lo 20 °F Hi 35 °F Lo 22 °F Hi 41 °F Lo 24 °F

 

Overnight
 
Scattered showers before 4am. Mostly cloudy, with a low around 32. Southwest wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Sunday
 
Mostly sunny, with a high near 38. West wind 13 to 17 mph, with gusts as high as 28 mph.
Sunday Night
 
Mostly clear, with a low around 21. Northwest wind 13 to 15 mph, with gusts as high as 24 mph.
M.L.King Day
 
Sunny, with a high near 33. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Monday Night
 
Mostly clear, with a low around 20. Northwest wind 7 to 9 mph.
Tuesday
 
Sunny, with a high near 35.
Tuesday Night
 
Mostly clear, with a low around 22.
Wednesday
 
Sunny, with a high near 41.
Wednesday Night
 
Mostly clear, with a low around 24.
Thursday
 
Sunny, with a high near 46.
Thursday Night
 
Partly cloudy, with a low around 28.
Friday
 
Mostly sunny, with a high near 49.
Friday Night
 
A chance of showers. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.
Saturday
 
Showers likely. Cloudy, with a high near 49. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Halethorpe MD.

National Weather Service Forecast for: Arbutus, MD
Issued by: National Weather Service Baltimore/Washington
Updated: Sun, 19-Jan-2020 12:34am EST

Halethorpe, MD
 
  Sunday

Sunday: Mostly Sunny
Mostly Sunny
M.L. King
Jr. Day
M.L. King Jr. Day: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Partly Sunny
Partly Sunny
Saturday

Saturday: Rain Showers Likely
Rain Showers Likely
  Hi 38 °F Hi 33 °F Hi 35 °F Hi 41 °F Hi 46 °F Hi 49 °F Hi 49 °F
 
Overnight

Overnight: Scattered Rain Showers
Scattered Rain Showers
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday
Night
Friday Night: Chance Rain Showers
Chance Rain Showers
 
Lo 32 °F Lo 21 °F Lo 20 °F Lo 22 °F Lo 24 °F Lo 28 °F Lo 36 °F  

 

Overnight
 
Scattered rain showers before 4am. Mostly cloudy, with a low around 32. West wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Sunday
 
Mostly sunny, with a high near 38. West wind 10 to 17 mph, with gusts as high as 28 mph.
Sunday Night
 
Mostly clear, with a low around 21. Northwest wind 13 to 16 mph, with gusts as high as 25 mph.
M.L. King Jr. Day
 
Sunny, with a high near 33. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Monday Night
 
Mostly clear, with a low around 20. Northwest wind 7 to 10 mph.
Tuesday
 
Sunny, with a high near 35.
Tuesday Night
 
Mostly clear, with a low around 22.
Wednesday
 
Sunny, with a high near 41.
Wednesday Night
 
Mostly clear, with a low around 24.
Thursday
 
Sunny, with a high near 46.
Thursday Night
 
Partly cloudy, with a low around 28.
Friday
 
Partly sunny, with a high near 49.
Friday Night
 
A chance of rain showers after 7pm. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.
Saturday
 
Rain showers likely. Mostly cloudy, with a high near 49. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Arbutus, MD.