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-V5.07.php?inc=y&z=0 output
National Weather Service Forecast for: Halethorpe MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 7:28 am EDT Apr 24, 2018

Halethorpe, MD
 
Today

Today: Rain likely, mainly after 2pm.  Cloudy, with a high near 60. East wind 9 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Slight Chance
Rain then
Rain Likely
Tonight

Tonight: Rain.  Low around 52. East wind 9 to 14 mph, with gusts as high as 23 mph.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Rain

Wednesday

Wednesday: Showers likely.  Cloudy, with a high near 66. Northwest wind 5 to 10 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers
Likely
Wednesday
Night
Wednesday Night: A chance of showers before 10pm.  Cloudy during the early evening, then gradual clearing, with a low around 48. Northwest wind 10 to 13 mph.  Chance of precipitation is 30%.
Chance
Showers then
Partly Cloudy
Thursday

Thursday: Sunny, with a high near 66. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Sunny

Thursday
Night
Thursday Night: A chance of showers after 2am.  Partly cloudy, with a low around 47. Chance of precipitation is 30%.
Partly Cloudy
then Chance
Showers
Friday

Friday: A chance of showers.  Partly sunny, with a high near 65. Chance of precipitation is 30%.
Chance
Showers
Friday
Night
Friday Night: Mostly cloudy, with a low around 49.
Mostly Cloudy

Saturday

Saturday: A chance of showers.  Mostly sunny, with a high near 68. Chance of precipitation is 30%.
Chance
Showers
Hi 60 °F Lo 52 °F Hi 66 °F Lo 48 °F Hi 66 °F Lo 47 °F Hi 65 °F Lo 49 °F Hi 68 °F

 

Today
 
Rain likely, mainly after 2pm. Cloudy, with a high near 60. East wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
 
Rain. Low around 52. East wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday
 
Showers likely. Cloudy, with a high near 66. Northwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
A chance of showers before 10pm. Cloudy during the early evening, then gradual clearing, with a low around 48. Northwest wind 10 to 13 mph. Chance of precipitation is 30%.
Thursday
 
Sunny, with a high near 66. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Thursday Night
 
A chance of showers after 2am. Partly cloudy, with a low around 47. Chance of precipitation is 30%.
Friday
 
A chance of showers. Partly sunny, with a high near 65. Chance of precipitation is 30%.
Friday Night
 
Mostly cloudy, with a low around 49.
Saturday
 
A chance of showers. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
Saturday Night
 
Partly cloudy, with a low around 46.
Sunday
 
Sunny, with a high near 64.
Sunday Night
 
Mostly clear, with a low around 45.
Monday
 
Sunny, with a high near 69.

 

Forecast from NOAA-NWS for Halethorpe MD.

National Weather Service Forecast for: Arbutus, MD
Issued by: National Weather Service Baltimore/Washington
Updated: Tue, 24-Apr-2018 7:28am EDT

Halethorpe, MD
 
Today

Today: Rain
Rain
Wednesday

Wednesday: Light Rain then Rain Showers Likely
Light Rain then Rain Showers Likely
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Chance Rain Showers
Chance Rain Showers
Saturday

Saturday: Chance Rain Showers
Chance Rain Showers
Sunday

Sunday: Slight Chance Rain Showers
Slight Chance Rain Showers
Monday

Monday: Sunny
Sunny
 
Hi 60 °F ↓ Hi 66 °F Hi 66 °F Hi 65 °F Hi 68 °F Hi 64 °F Hi 69 °F  
 
Tonight

Tonight: Rain
Rain
Wednesday
Night
Wednesday Night: Rain Showers Likely then Mostly Cloudy
Rain Showers Likely then Mostly Cloudy
Thursday
Night
Thursday Night: Partly Cloudy then Chance Rain Showers
Partly Cloudy then Chance Rain Showers
Friday
Night
Friday Night: Chance Rain Showers
Chance Rain Showers
Saturday
Night
Saturday Night: Chance Rain Showers
Chance Rain Showers
Sunday
Night
Sunday Night: Slight Chance Rain Showers then Mostly Clear
Slight Chance Rain Showers then Mostly Clear
Monday
Night
Monday Night: Clear
Clear
 
Lo 52 °F Lo 48 °F Lo 47 °F Lo 49 °F Lo 46 °F Lo 45 °F Lo 51 °F  

 

Today
 
Rain after 11am. Cloudy. High near 60, with temperatures falling to around 53 in the afternoon. East wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
Rain, then rain showers likely. Cloudy, with a low around 52. East wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
 
Rain before 6am, then rain showers likely. Cloudy, with a high near 66. North wind 5 to 12 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
 
Rain showers likely before 10pm. Mostly cloudy, with a low around 48. Northwest wind around 13 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
Sunny, with a high near 66. Northwest wind 7 to 14 mph, with gusts as high as 21 mph.
Thursday Night
 
A chance of rain showers after 2am. Partly cloudy, with a low around 47. Chance of precipitation is 30%.
Friday
 
A chance of rain showers. Partly sunny, with a high near 65. Chance of precipitation is 30%.
Friday Night
 
A chance of rain showers. Mostly cloudy, with a low around 49. Chance of precipitation is 30%.
Saturday
 
A chance of rain showers. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
Saturday Night
 
A chance of rain showers. Partly cloudy, with a low around 46. Chance of precipitation is 30%.
Sunday
 
A slight chance of rain showers. Sunny, with a high near 64.
Sunday Night
 
A slight chance of rain showers before 8pm. Mostly clear, with a low around 45.
Monday
 
Sunny, with a high near 69.
Monday Night
 
Clear, with a low around 51.

 

Forecast from NOAA-NWS for Arbutus, MD.