16 MD Jurisdictions Under Severe Thunderstorm Watch As Temps Top 100

MARYLAND — Amid scorching heat, the National Weather Service has issued a severe thunderstorm watch for parts of Maryland from Baltimore to the DC area until 10 p.m. Tuesday.

The region is also under a heat advisory for the second day in a row. Excessive heat warnings and watches extend from the Mid-Atlantic region to parts of New England. The temperature was 103 degrees at Baltimore/Washington International Airport at 4:20 p.m.

The severe thunderstorm watch includes: Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil, Charles, Frederick, Harford, Howard, Kent, Montgomery, Prince George's, Queen Anne's, and Talbot counties, plus the city of Baltimore.

Tuesday's real-feel heat index could peak at 110 degrees. The heat index may hit 105 to 110 degrees on Wednesday.

The National Weather Service issued another excessive heat warning on Tuesday. The alert lasts from 11 a.m. to 8 p.m. and calls for "dangerously hot conditions." The warning covers portions of central, northern and southern Maryland.

The National Weather Service also warned of possible "isolated severe thunderstorms with damaging wind gusts" Tuesday afternoon and evening. Wednesday could bring scattered severe thunderstorms and wind damage as well. Thursday also has a chance of thunderstorms.

Thursday's high of 87 will feel like a cold blast after weeks of summer sun. Highs should hover in the upper-80s and low-90s through Monday.

Here is an hour-by-hour forecast at Baltimore/Washington International Thurgood Marshall Airport, according to the National Weather Service.

The true temperature is listed first. The heat index is in parentheses.

Tuesday

• 9 a.m. - 85 (90)
• Noon - 98 (104)
• 3 p.m. - 101 (109)
• 6 p.m. - 95 (102)
• 9 p.m. - 86 (91)

Wednesday

• 9 a.m. - 84 (90)
• Noon - 94 (102)
• 3 p.m. - 96 (105)
• 6 p.m. - 88 (95)
• 9 p.m. - 82 (87)

Thursday

• 9 a.m. - 77 (77)
• Noon - 83 (86)
• 3 p.m. - 86 (89)
• 6 p.m. - 85 (87)
• 9 p.m. - 80 (82)

Friday

• 9 a.m. - 74 (74)
• Noon - 84 (84)
• 3 p.m. - 88 (87)
• 6 p.m. - 88 (87)
• 9 p.m. - 82 (83)

Saturday

• 9 a.m. - 76 (76)
• Noon - 84 (86)
• 3 p.m. - 87 (88)
• 6 p.m. - 86 (88)
• 9 p.m. - 81 (83)

Sunday

• 9 a.m. - 77 (77)
• Noon - 87 (89)
• 3 p.m. - 91 (92)
• 6 p.m. - 90 (91)
• 9 p.m. - 83 (85)

Here is the National Weather Service's seven-day forecast at BWI Airport:

Tuesday: Scattered showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 102. Heat index values as high as 109. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

Tuesday Night: Scattered showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 76. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.

Wednesday: A slight chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 106. Southwest wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday Night: Showers and thunderstorms likely before 11pm, then showers likely and possibly a thunderstorm between 11pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 74. Southwest wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 87. North wind 6 to 8 mph. Chance of precipitation is 30%.

Thursday Night: Partly cloudy, with a low around 68.

Friday: Mostly sunny, with a high near 89.

Friday Night: Mostly cloudy, with a low around 70.

Saturday: Partly sunny, with a high near 88.

Saturday Night: Partly cloudy, with a low around 70.

Sunday: Mostly sunny, with a high near 92.

Sunday Night: Mostly cloudy, with a low around 72.

Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 30%.