156 FLUS41 KLWX 170910 HWOLWX Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 510 AM EDT Wed Jul 17 2019 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-180915- Chesapeake Bay north of Pooles Island MD- Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Key Bridge to Indian Head MD- Tidal Potomac from Indian Head to Cobb Island MD- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island-District of Columbia-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 510 AM EDT Wed Jul 17 2019 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and adjacent counties in central Maryland and northern Virginia as well as the District of Columbia. .DAY ONE...Today and Tonight A Heat Advisory is in effect for the entire area from 11 AM late this morning until 8 PM this evening. Thunderstorms may be capable of producing isolated damaging wind gusts or instances of flooding this afternoon and evening, especially over northern and northeastern Maryland. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Heat indices may approach 105 degrees Thursday afternoon. Dangerous heat and humidity are likely Friday through Sunday across the entire area. Heat indices of 110 to 115 degrees are possible during the afternoon and evening hours each day, and heat indices may hold in the 80s and 90s at night. If the prolonged heat and humidity is realized, it will become a significant threat to anyone exposed to the heat for an extended period of time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. $$ MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-180915- Washington-Frederick MD-Carroll-Northern Baltimore- Extreme Western Allegany-Central and Eastern Allegany- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant- Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 510 AM EDT Wed Jul 17 2019 This Hazardous Weather Outlook is for eastern West Virginia, northern and central Virginia, and central and western Maryland with the exception of Garrett County. .DAY ONE...Today and Tonight A Heat Advisory is in effect for southeastern Howard and southeastern Montgomery Counties in Maryland from 11 AM late this morning through 8 PM this evening. Thunderstorms may be capable of producing isolated damaging wind gusts or instances of flooding this afternoon and evening, especially over northern and northeastern Maryland. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Heat indices around 100 degrees are possible Thursday afternoon. Dangerous heat and humidity are likely Friday through Sunday across the entire area. Heat indices around 105 to 110 degrees are possible during the afternoon and evening hours each day, especially in the Valleys and east of the Blue Ridge Mountains. If the prolonged heat and humidity is realized, it will become a significant threat to anyone exposed to the heat for an extended period of time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. $$ DHOF