Weather Alert in Maryland
Tropical Cyclone Statement issued August 20 at 11:20PM EDT by NWS Wakefield VA
AREAS AFFECTED: Dorchester; Wicomico; Somerset; Inland Worcester; Maryland Beaches; Pasquotank; Camden; Western Currituck; Bertie; Chowan; Perquimans; Eastern Currituck; Westmoreland; Richmond; Northumberland; Lancaster; Charles City; New Kent; Gloucester; Middlesex; Mathews; Surry; James City; Isle of Wight; Norfolk/Portsmouth; Suffolk; Chesapeake; Virginia Beach; Accomack; Northampton; Eastern King William; Eastern King and Queen; Eastern Essex; York; Newport News; Hampton/Poquoson
DESCRIPTION: HLSAKQ This product covers CENTRAL AND EASTERN VIRGINIA...NORTHEAST NORTH CAROLINA...AND THE LOWER MARYLAND EASTERN SHORE **TROPICAL STORM CONDITIONS AT OR NEAR PORTIONS OF THE NORTH CAROLINA COAST** NEW INFORMATION --------------- * CHANGES TO WATCHES AND WARNINGS: - None * CURRENT WATCHES AND WARNINGS: - A Tropical Storm Warning is in effect for Accomack, Eastern Currituck, Northampton, Virginia Beach, and Western Currituck * STORM INFORMATION: - About 400 miles south-southeast of Ocean City MD or about 330 miles south-southeast of Norfolk VA - 32.8N 73.1W - Storm Intensity 110 mph - Movement North or 10 degrees at 16 mph SITUATION OVERVIEW ------------------ Hurricane Erin, currently about 215 miles southeast of Cape Hatteras, NC and moving to the north, will gradually turn northeastward as the center of the storm tracks well offshore of the Middle Atlantic coast. However, Erin is expected to grow in size which may allow for tropical storm conditions to impact areas close to the coast from the Virginia Eastern Shore, Virginia Beach, Currituck County, as well as the Maryland, Virginia and northeast North Carolina Coastal Waters. Winds of 30 to 40 mph with gusts to 45 mph are possible close to the coast south of Chincoteague. Regardless of the exact track, Erin is expected to bring high surf, significant dune and beach erosion and moderate to locally major tidal flooding to the area. Seas will increase to 12 to 18 feet over the coastal waters by Thursday which will allow for significant beach and dune erosion for the coast especially around the times of high tide on Thursday morning and Thursday evening. In addition, moderate to locally major coastal flooding is expected during the Thursday afternoon and evening high tide with inundation of 1 to 3 feet above normally high ground. A Coastal Flood Warning is in effect for the Atlantic coast from Corolla, NC to Ocean City, MD, areas adjacent to the Chesapeake Bay south of the mouth of the York River, the southern shore of the York River, and along the tidal portion of the James River, as well as adjacent estuaries. A Coastal Flood Watch is in effect for areas adjacent to the Chesapeake Bay north of the mouth of the York River, including the northern shore of the York River through the Bay-side of the lower Maryland Eastern Shore, the Rappahannock River, and the southern shore of the Potomac River, as well as adjacent estuaries. POTENTIAL IMPACTS ----------------- * SURGE: Protect against locally hazardous surge having possible limited impacts across all of the shoreline from Maryland through Virginia to NE North Carolina, including the lower and middle Chesapeake Bay. Potential impacts in this area include: - Widespread storm surge flooding of vulnerable areas will result in an elevated threat of property damage to homes and businesses near the waterfront and shoreline. - Sections of low-lying vulnerable roads, parking lots and property will likely become flooded. Driving conditions could become dangerous in places where flooding covers the road. - Moderate to severe beach erosion is likely, including heavy surf possibly breaching dunes, especially in vulnerable locations. Strong and dangerous rip currents are expected. - Minor to moderate damage to marinas, docks, boardwalks, and piers is likely. A few small craft broken away from moorings. Elsewhere across CENTRAL AND EASTERN VIRGINIA...NORTHEAST NORTH CAROLINA...AND THE LOWER MARYLAND EASTERN SHORE, little to no impact is anticipated. * OTHER COASTAL HAZARDS: Along the Atlantic coast from Fenwick Island Delaware to Duck North Carolina, expect waves to build to 12 to 18 ft by Thursday morning. These large waves combined with increased water levels will likely allow for significant beach and dune erosion. There is a high risk of rip currents along the shoreline through Friday, and a high risk of rip currents will likely continue into the weekend. * WIND: Protect against hazardous wind having possible limited impacts across the area close to the shoreline from Chincoteague VA to Duck NC. Potential impacts in this area include: - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, especially if soils are saturated. Some roadway signs will sustain damage. - A few roads will be impassable from debris. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. Elsewhere across CENTRAL AND EASTERN VIRGINIA...NORTHEAST NORTH CAROLINA...AND THE LOWER MARYLAND EASTERN SHORE, little to no impact is anticipated. PRECAUTIONARY/PREPAREDNESS ACTIONS ---------------------------------- * EVACUATIONS: A mandatory evacuation for the off-road area of Corolla has been effective as of 9 AM EDT Wednesday August 20th. * OTHER PREPAREDNESS INFORMATION: When making safety and preparedness decisions, do not focus on the exact forecast track since hazards such as flooding rain, damaging wind gusts, storm surge, and tornadoes extend well away from the center of the storm. Always heed the advice of local officials and comply with orders that are issued. Do not needlessly jeopardize your life or the lives of others. Closely monitor weather.gov, NOAA Weather Radio and local news outlets for official storm information. Listen for possible changes to the forecast. * ADDITIONAL SOURCES OF INFORMATION: - For information on appropriate preparations see www.readyvirginia.gov, readync.org or mema.maryland.gov - For the latest weather and storm information go to weather.gov/wakefield NEXT UPDATE ----------- The next local statement will be issued by the National Weather Service in Wakefield VA around 6 AM EDT, or sooner if conditions warrant.
INSTRUCTION: N/A
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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