Future

SEVERE THUNDERSTORM WATCH 509, PREVIOUSLY IN EFFECT UNTIL 1 AM EDT EARLY THIS MORNING, IS NOW IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA RAPPAHANNOCK RIVER FROM URBANNA TO WINDMILL POINT

THE NATIONAL WEATHER SERVICE WILL ALLOW SEVERE THUNDERSTORM WATCH 510 TO EXPIRE AT MIDNIGHT CDT TONIGHT FOR THE FOLLOWING AREAS IN TENNESSEE THIS ALLOWS TO EXPIRE 6 COUNTIES IN MIDDLE TENNESSEE GILES LAWRENCE LEWIS MARSHALL MAURY WAYNE THIS INCLUDES THE CITIES OF CLIFTON, COLLINWOOD, COLUMBIA, HOHENWALD, LAWRENCEBURG, LEWISBURG, PULASKI, AND WAYNESBORO.

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of southwest Montana, including the following areas, Gallatin and Madison County Mountains and Centennial Mountains, Northwest Beaverhead County and Ruby Mountains and Southern Beaverhead Mountains. * WHEN...From Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas.

SEVERE THUNDERSTORM WATCH 509, PREVIOUSLY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT, IS NOW IN EFFECT UNTIL 1 AM EDT WEDNESDAY FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 4 COUNTIES IN SOUTHEAST MARYLAND DORCHESTER SOMERSET WICOMICO WORCESTER IN VIRGINIA THIS WATCH INCLUDES 15 COUNTIES IN CENTRAL VIRGINIA CUMBERLAND FLUVANNA GOOCHLAND HANOVER LOUISA POWHATAN IN EAST CENTRAL VIRGINIA ESSEX KING WILLIAM KING AND QUEEN

SEVERE THUNDERSTORM WATCH 509, PREVIOUSLY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT, IS NOW IN EFFECT UNTIL 1 AM EDT WEDNESDAY FOR THE FOLLOWING AREAS THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA RAPPAHANNOCK RIVER FROM URBANNA TO WINDMILL POINT

* WHAT...Southwest winds 20 to 30 kt with gusts up to 35 kt and seas 5 to 8 ft. * WHERE...Portions of and the coastal lakes and bays of the Gulf of America. * WHEN...Wednesday night into Thursday. * IMPACTS...Tropical storm force winds and hazardous seas could capsize or damage vessels and reduce visibility. Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas.

SEVERE THUNDERSTORM WATCH 509...PREVIOUSLY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...IS NOW IN EFFECT UNTIL 1 AM EDT WEDNESDAY FOR THE FOLLOWING AREAS IN VIRGINIA THIS WATCH INCLUDES 7 COUNTIES IN CENTRAL VIRGINIA AMHERST APPOMATTOX BUCKINGHAM IN WEST CENTRAL VIRGINIA BATH CITY OF BUENA VISTA CITY OF LEXINGTON ROCKBRIDGE

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central New Mexico, including the following areas, East Slopes Sacramento Mountains Below 7500 Feet, Sacramento Mountains Above 7500 Feet and West Slopes Sacramento Mountains Below 7500 Feet. * WHEN...Wednesday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS...

* AFFECTED AREA...Fire Weather Zone 655 Black Hills and Southwest Interior Lowlands and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * LIGHTNING...Isolated to scattered thunderstorm coverage is possible across the southern Cascade Mountains and portions of southwest Washington. Thunderstorms will develop late Wednesday night and move from south to north across the area. * OUTFLOW WINDS...Any storms that develop will be capable of

SEVERE THUNDERSTORM WATCH 509 REMAINS VALID UNTIL MIDNIGHT EDT TONIGHT FOR THE FOLLOWING AREAS IN MARYLAND THIS WATCH INCLUDES 1 COUNTY IN SOUTHERN MARYLAND ST. MARYS IN VIRGINIA THIS WATCH INCLUDES 1 COUNTY IN CENTRAL VIRGINIA NELSON THIS INCLUDES THE CITIES OF CALIFORNIA, CALLAWAY, DAMERON, GREENFIELD, LEXINGTON PARK, MONTEBELLO, PINEY POINT, RIDGE, AND SOTTERLEY.