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-V4.05.php?inc=y&z=0 output

https://www.halethorpeweather.com/advforecast2-V5.17.php?inc=y&z=0 output

National Weather Service Forecast for: Halethorpe MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 10:32 pm EDT Oct 15, 2021

Halethorpe, MD
 
Overnight

Overnight: Partly cloudy, with a low around 65. South wind around 7 mph.
Partly Cloudy

Saturday

Saturday: Showers and possibly a thunderstorm. Some of the storms could produce gusty winds.  High near 80. Breezy, with a south wind 8 to 13 mph becoming southwest 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunny then
Showers and
Breezy
Saturday
Night
Saturday Night: Showers likely, mainly before 7pm.  Mostly cloudy during the early evening, then gradual clearing, with a low around 50. Northwest wind around 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Showers
Likely then
Clear
Sunday

Sunday: Sunny, with a high near 65. Northwest wind 10 to 17 mph, with gusts as high as 29 mph.
Sunny

Sunday
Night
Sunday Night: Mostly clear, with a low around 48. West wind 8 to 10 mph.
Mostly Clear

Monday

Monday: Sunny, with a high near 67.
Sunny

Monday
Night
Monday Night: Clear, with a low around 48.
Clear

Tuesday

Tuesday: Sunny, with a high near 71.
Sunny

Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 52.
Partly Cloudy

Lo 65 °F Hi 80 °F Lo 50 °F Hi 65 °F Lo 48 °F Hi 67 °F Lo 48 °F Hi 71 °F Lo 52 °F

 

Overnight
 
Partly cloudy, with a low around 65. South wind around 7 mph.
Saturday
 
Showers and possibly a thunderstorm. Some of the storms could produce gusty winds. High near 80. Breezy, with a south wind 8 to 13 mph becoming southwest 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
Showers likely, mainly before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 50. Northwest wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
 
Sunny, with a high near 65. Northwest wind 10 to 17 mph, with gusts as high as 29 mph.
Sunday Night
 
Mostly clear, with a low around 48. West wind 8 to 10 mph.
Monday
 
Sunny, with a high near 67.
Monday Night
 
Clear, with a low around 48.
Tuesday
 
Sunny, with a high near 71.
Tuesday Night
 
Partly cloudy, with a low around 52.
Wednesday
 
Sunny, with a high near 74.
Wednesday Night
 
Mostly clear, with a low around 52.
Thursday
 
Mostly sunny, with a high near 73.
Thursday Night
 
Mostly cloudy, with a low around 55.
Friday
 
Partly sunny, with a high near 71.

 

Forecast from NOAA-NWS for Halethorpe MD.

National Weather Service Forecast for: Arbutus, MD
Issued by: National Weather Service Baltimore/Washington
Updated: Fri, 15-Oct-2021 10:32pm EDT

Halethorpe, MD
 
  Saturday

Saturday: Mostly Sunny then Showers And Thunderstorms
Mostly Sunny then Showers And T-Storms
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Slight Chance Rain Showers
Slight Chance Rain Showers
  Hi 80 °F ↓ Hi 65 °F Hi 67 °F Hi 71 °F Hi 74 °F Hi 73 °F Hi 71 °F
 
Overnight

Overnight: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Rain Showers Likely then Mostly Clear
Rain Showers Likely then Mostly Clear
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Clear
Clear
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
 
Lo 65 °F Lo 50 °F Lo 48 °F Lo 48 °F Lo 52 °F Lo 52 °F Lo 55 °F  

 

Overnight
 
Partly cloudy, with a low around 65. South wind around 7 mph.
Saturday
 
A chance of rain showers between 1pm and 2pm, then showers and thunderstorms. Mostly sunny. High near 80, with temperatures falling to around 66 in the afternoon. Southwest wind 7 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday Night
 
Rain showers likely before 8pm. Mostly clear, with a low around 50. Northwest wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday
 
Sunny, with a high near 65. Northwest wind 9 to 17 mph, with gusts as high as 29 mph.
Sunday Night
 
Mostly clear, with a low around 48. West wind 8 to 15 mph, with gusts as high as 24 mph.
Monday
 
Sunny, with a high near 67.
Monday Night
 
Clear, with a low around 48.
Tuesday
 
Sunny, with a high near 71.
Tuesday Night
 
Partly cloudy, with a low around 52.
Wednesday
 
Sunny, with a high near 74.
Wednesday Night
 
Mostly clear, with a low around 52.
Thursday
 
Mostly sunny, with a high near 73.
Thursday Night
 
A slight chance of rain showers after 8pm. Mostly cloudy, with a low around 55.
Friday
 
A slight chance of rain showers. Partly sunny, with a high near 71.

 

Forecast from NOAA-NWS for Arbutus, MD.