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-V5.14.php?inc=y&z=0 output

National Weather Service Forecast for: Halethorpe MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Updated: 4:31 am EDT Jul 4, 2020

Halethorpe, MD
 
Independence
Day
Independence Day: Isolated showers and thunderstorms after 1pm.  Partly sunny, with a high near 89. Northeast wind around 6 mph.  Chance of precipitation is 20%.
Partly Sunny
then Isolated
T-storms
Tonight

Tonight: Partly cloudy, with a low around 71. Light and variable wind.
Partly Cloudy

Sunday

Sunday: A slight chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 93. West wind 3 to 5 mph.  Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
Sunday
Night
Sunday Night: Mostly clear, with a low around 73. Southwest wind 3 to 6 mph.
Mostly Clear

Monday

Monday: A slight chance of showers and thunderstorms after 2pm.  Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.  Chance of precipitation is 20%.
Sunny then
Slight Chance
T-storms
Monday
Night
Monday Night: Partly cloudy, with a low around 72.
Partly Cloudy

Tuesday

Tuesday: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Sunny then
Chance
T-storms
Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Chance
T-storms then
Partly Cloudy
Wednesday

Wednesday: A chance of showers and thunderstorms after 8am.  Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Chance
T-storms

Hi 89 °F Lo 71 °F Hi 93 °F Lo 73 °F Hi 95 °F Lo 72 °F Hi 93 °F Lo 73 °F Hi 91 °F

 

Independence Day
 
Isolated showers and thunderstorms after 1pm. Partly sunny, with a high near 89. Northeast wind around 6 mph. Chance of precipitation is 20%.
Tonight
 
Partly cloudy, with a low around 71. Light and variable wind.
Sunday
 
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. West wind 3 to 5 mph. Chance of precipitation is 20%.
Sunday Night
 
Mostly clear, with a low around 73. Southwest wind 3 to 6 mph.
Monday
 
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
 
Partly cloudy, with a low around 72.
Tuesday
 
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Tuesday Night
 
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Wednesday
 
A chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Wednesday Night
 
Partly cloudy, with a low around 73.
Thursday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 30%.
Thursday Night
 
Partly cloudy, with a low around 73.
Friday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Halethorpe MD.

National Weather Service Forecast for: Arbutus, MD
Issued by: National Weather Service Baltimore/Washington
Updated: Sat, 04-Jul-2020 4:31am EDT

Halethorpe, MD
 
  Independence
Day
Independence Day: Mostly Sunny then Isolated Showers And Thunderstorms
Mostly Sunny then Isolated Showers And T-Storms
Sunday

Sunday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Monday

Monday: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms
Tuesday

Tuesday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Wednesday

Wednesday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday

Thursday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday

Friday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 89 °F Hi 93 °F Hi 95 °F Hi 93 °F Hi 91 °F Hi 91 °F Hi 90 °F
 
Overnight

Overnight: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Isolated Showers And Thunderstorms then Partly Cloudy
Isolated Showers And T-Storms then Partly Cloudy
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms then Mostly Clear
Slight Chance Showers And T-Storms then Mostly Clear
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
 
Lo 73 °F Lo 71 °F Lo 73 °F Lo 72 °F Lo 73 °F Lo 73 °F Lo 73 °F  

 

Overnight
 
Partly cloudy, with a low around 73. North wind around 5 mph.
Independence Day
 
Isolated showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Northeast wind around 6 mph. Chance of precipitation is 20%.
Saturday Night
 
Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. South wind around 5 mph. Chance of precipitation is 20%.
Sunday
 
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Southwest wind around 5 mph. Chance of precipitation is 20%.
Sunday Night
 
A slight chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 73. South wind around 6 mph. Chance of precipitation is 20%.
Monday
 
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 95. Chance of precipitation is 20%.
Monday Night
 
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72.
Tuesday
 
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Tuesday Night
 
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Wednesday
 
A chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Wednesday Night
 
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Thursday
 
A chance of showers and thunderstorms after 8am. Partly sunny, with a high near 91. Chance of precipitation is 30%.
Thursday Night
 
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
 
A chance of showers and thunderstorms after 8am. Partly sunny, with a high near 90. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Arbutus, MD.