Expires:202506231000;;217804 FPUS51 KLWX 230234 ZFPLWX Zone Forecast Product National Weather Service Baltimore MD/Washington DC 1033 PM EDT Sun Jun 22 2025 MDZ507-231000- Northwest Harford- Including the city of Jarrettsville 1033 PM EDT Sun Jun 22 2025 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 9 PM EDT MONDAY... ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .REST OF TONIGHT...Partly cloudy late this evening, then clearing. Lows in the mid 70s. West winds around 5 mph. .MONDAY...Sunny, hot with highs in the upper 90s. Northwest winds 5 to 10 mph. Heat index values up to 110. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. Northwest winds around 5 mph. .TUESDAY...Sunny, hot with highs in the upper 90s. Northwest winds around 5 mph. .TUESDAY NIGHT...Mostly clear. Lows in the upper 70s. Northwest winds around 5 mph. .WEDNESDAY...Sunny, hot with highs in the mid 90s. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 30 percent. .THURSDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 50 percent. .THURSDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 50 percent. .FRIDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent. .FRIDAY NIGHT...Mostly cloudy with a chance of showers. Lows around 70. Chance of rain 50 percent. .SATURDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .SATURDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows around 70. Chance of rain 50 percent. .SUNDAY...Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 40 percent. $$