Coastal Flood

The National Weather Service has issued a coastal flood warning for Anne Arundel County, effective through 6 a.m. Wednesday. High tides are expected to be 2 feet above normal, causing "moderate coastline inundation," the warning says. A coastal flood warning means the flooding is expected to be imminent. Any flooding is expected in the wee hours of Wednesday morning. High tides are expected as follows: 12:58 a.m. at the Thomas Point Shoal Light House at the mouth of the South River; 1:01 a.m. in Edgewater on the South River; 1:04 a.m. at Shady Side on the West River; 1:32 a.m. at theU.S.

Another day of springlike weather is forecast Monday in the Baltimore area, with highs around 60 degrees, according to the National Weather Service. Clouds are expected to move in throughout the day, with mostly cloudy to overcast skies. A coastal flood watch was in effect for southern Baltimore County and Anne Arundel County. Tides are expected to be 2-2.5 feet above normal, with a southeasterly breeze of 10-15 mph pushing water toward the western shore of the Chesapeake Bay. A chance of showers arrives early Tuesday morning, though the warmth is forecast to stick around.

The crash of thunderstorms greeted morning commuters Monday morning, prompting coastal flood warnings, according to the National Weather Service. Showers and thunderstorms will continue this morning, with a chance of afternoon showers and thunderstorms, said meteorologist Andy Woodcock in the weather service's Sterling, Va., office. Highs will be in the mid-60s, he said. There is a coastal flood advisory, he said, with minor flooding possible. "In terms of freak out factor, this is low," he said.

4:30 p.m. update: The flood watch for the Baltimore region has been canceled, though the coastal flood advisory remained in effect. Forecasters are calling for up to an inch of rainfall. Original post, as of 3 p.m.:  A high chance of rain throughout Tuesday afternoon and evening has caused the National Weather Service to issue a flood watch for much of the Baltimore region, starting at 3 p.m. Streams and low-lying areas could flood, and minor tidal flooding is also possible, the weather service said.

The coastal flood advisory that has been in effect for parts of the Chesapeake Bay the last two mornings is a result of the full moon and sustained winds, according to the National Weather Service. Tides a foot higher than normal are expected, and have already been seen in lower parts of the bay. The U.S. Naval Academy's first high tide was at 7:47 a.m., Fort McHenry's was at 9 a.m. and Havre de Grace's around noon. High tides are expected again at 7:51 p.m. in Annapolis, 9:26 p.m. at Fort McHenry, 10:18 p.m. at Bowley's Quarters and 12:46 a.m. at Havre de Grace.

A minor coastal flood advisory is in effect for the western shore of the Chesapeake Bay through Thursday afternoon, according to the National Weather Service. The advisory continues through 2 p.m., according to the weather service's Sterling, Va., office, with water levels as much as a foot and a half higher, said meteorologist Bryan Jackson. High tides are expected to hit the Baltimore area after noon today, he said. "It's pretty common for the cooler seasons" to have coastal flood advisories, which can cause some problems for sensitive areas, he said.

4:30 p.m. update: The flood watch for the Baltimore region has been canceled, though the coastal flood advisory remained in effect. Forecasters are calling for up to an inch of rainfall. Original post, as of 3 p.m.:  A high chance of rain throughout Tuesday afternoon and evening has caused the National Weather Service to issue a flood watch for much of the Baltimore region, starting at 3 p.m. Streams and low-lying areas could flood, and minor tidal flooding is also possible, the weather service said.

The National Weather Service was calling for showers on Friday in the Baltimore area and possible thunderstorms after noon. The high temperature was expected to be 81 degrees, with calm winds becoming northeast around 5 miles per hour. The chance of rain is 70 percent. New rainfall amounts between one quarter of an inch and half an inch are possible. A coastal flood advisory is in effect until 10 a.m. Friday for counties along the western shore of the Chesapeake Bay and the middle and lower tidal Potomac River.

The National Weather Service is calling for Thursday to be partly sunny in the Baltimore area, with a high near 81 degrees and winds becoming westerly between 8 and 11 miles per hour. There is a 40 percent chance of precipitation. Scattered showers and thunderstorms would most likely come after 2 p.m. A coastal flood advisory is in effect until 6 a.m. Friday for counties along the tidal Potomac River and the western shore of the Chesapeake Bay. Thursday night is expected to be partly cloudy, with a low around 61 and west winds about 6 miles per hour.

Governor Martin O'Malley said Maryland was experiencing "America's weather in miniature" as the remnants of Sandy approached the state bringing blizzards in the west, tidal flooding in the east and wind and rain everywhere else. "This is goin to be a long night," Governor O'Malley said. "The next 12 hours of this storm will likely be the most intense. " Snow was already falling in the western-most parts of the state at 10 p.m. Monday and blizzard warnings were in effect, with 7-to-11 inches of snow forecast overnight in Oakland.

Another day of unseasonably mild temperatures is in the forecast Wednesday, though without Tuesday's sunshine. Chances of showers are forecast throughout the day, with strong thunderstorms possible late, according to the National Weather Service. Lows are forecast in the upper 40s and highs in the upper 60s. More than an inch of rain is possible, most of it in the afternoon and evening as storms pass through ahead of a strong cold front. A flash flood watch is in effect for Central Maryland from 3 p.m. through late tonight.

A tornado watch and flash flood warning are in effect for the Baltimore region, with heavy rain and gusty winds expected through the night. The tornado watch area includes all of central and southern Maryland and is effective through 2 a.m. Thursday. A tornado watch means conditions are favorable for tornado development but does not mean any have or will occur. The Baltimore area is also under a flash-flood warning, coastal flood advisory and a wind advisory through early Thursday.

Mild temperatures are in the forecast for Friday across the Baltimore area, good for enjoying a long weekend or a start to holiday shopping. Temperatures could break 60 degrees after nearing that mark for the past two days. Skies should be sunny to start the day with clouds moving in over the afternoon, according to the National Weather Service. A coastal flood advisory is in effect for tidal areas of Harford, Baltimore and Anne Arundel counties, with high tides expected to reach about 1.5 feet above normal.

A nor'easter storm was billed as Maryland's first potential snow event of the season, but if any flakes fell, they were only in flurries, according to National Weather Service reports. No reports of snow were posted by the weather service's Baltimore/Washington forecast office. Forecasters there  said Wednesday the storm tracked slightly too far east  to affect central Maryland, and with a narrow band of precipitation to its west. The weather service's Mount Holly, N.J., office, which covers the Philadelphia area including northern Eastern Shore counties in Maryland,  reported anywhere from a trace of snow to a foot  of it. Traces were measured just over the Maryland/Delaware border in Bear, Del., and further up Interstate 95 in Wilmington, Del. But no snow was reported in any Maryland counties.

The National Weather Service is calling for Thursday to be cloudy in the Baltimore area, with a high near 57 and west winds 10 to 17 miles per hour. A coastal flood warning is in effect until 2 p.m. Thursday for the upper tidal Potomac River. A small craft advisory is in effect through Thursday night for the tidal Potomac River and the Maryland Chesapeake Bay. Thursday night is expected to start out mostly cloudy and then gradually become clearer, with a low around 42 and west winds 9 to 11 miles per hour.

The National Weather Service issued coastal flood warnings for many parts of Maryland until 8 a.m. Wednesday. The affected areas are southern Baltimore County and Harford, Anne Arundel, Calvert, Charles and St. Mary's counties. Baltimore and Harford Counties should expect high tide levels 2 feet above normal. The other areas are expected to see levels 1 to 2 feet higher than usual. The tides will likely bring inundation of shoreline areas and large waves at high tide could make flooding worse, according to the weather service.

A tornado watch and flash flood warning are in effect for the Baltimore region, with heavy rain and gusty winds expected through the night. The tornado watch area includes all of central and southern Maryland and is effective through 2 a.m. Thursday. A tornado watch means conditions are favorable for tornado development but does not mean any have or will occur. The Baltimore area is also under a flash-flood warning, coastal flood advisory and a wind advisory through early Thursday.