Maryland, 2018

Coastal Flood in Maryland, September 9 to 11, 2018

September 9 to 11, 2018 · NWS LWX · 9 events in 2 counties and zones

Strong onshore flow led to increased water level anomalies and coastal flooding.

Where it happened

Every event with a place to put it; 9 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
9

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS LWX wrote it up.

Strong onshore flow led to increased water level anomalies and coastal flooding.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Sep 9, 8:24 AM EST, 2 hours 1 minute earlier.

Area forecast discussion, Sep 9, 8:24 AM EST, 2 hours 1 minute before
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Hazardous weather outlook, Sep 9, 4:21 AM EST, 6 hours 4 minutes before
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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

9 coastal flood. Local standard time, as filed.

Coastal Flood, St. Mary'S

When
September 9, 10:25 AM EST to 3:25 PM EST
Where
St. Mary'S forecast zone
Reported by
River/Stream Gage
Coordinates
38.216, -76.529 (the zone’s center; the record gives no point)

The gauge at Straits Point (SGSM2) indicated moderate flooding. At this stage, water covers roads on St. Georges Island, is in yards, and approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek. End time is estimated.

Coastal Flood, Anne Arundel

When
September 9, 2:38 PM EST to 6:36 PM EST
Where
Anne Arundel forecast zone
Reported by
River/Stream Gage
Coordinates
38.994, -76.568 (the zone’s center; the record gives no point)

The gauge at Annapolis (APAM2) indicated moderate flooding. At this stage, water comes up through storm drains, approaching businesses on Dock Street in Annapolis. Water also approaches the Maritime Museum and begins to cover Bowyer Road at the Naval Academy. Shoreline inundation up to one foot above ground occurs in other low lying areas.

Coastal Flood, St. Mary'S

When
September 9, 10:25 PM EST to September 10, 5:10 AM EST
Where
St. Mary'S forecast zone
Reported by
River/Stream Gage
Coordinates
38.216, -76.529 (the zone’s center; the record gives no point)

The gauge at Straits Point (SGSM2) indicated moderate flooding. At this stage, water covers roads on St. Georges Island, is in yards, and approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek. End time is estimated.

Coastal Flood, Anne Arundel

When
September 10, 3:24 AM EST to 7:00 AM EST
Where
Anne Arundel forecast zone
Reported by
River/Stream Gage
Coordinates
38.994, -76.568 (the zone’s center; the record gives no point)

The gauge at Annapolis (APAM2) indicated moderate flooding. At this stage, water comes up through storm drains, approaching businesses on Dock Street in Annapolis. Water also approaches the Maritime Museum and begins to cover Bowyer Road at the Naval Academy. Shoreline inundation up to one foot above ground occurs in other low lying areas.

Coastal Flood, St. Mary'S

When
September 10, 11:30 AM EST to 4:30 PM EST
Where
St. Mary'S forecast zone
Reported by
River/Stream Gage
Coordinates
38.216, -76.529 (the zone’s center; the record gives no point)

The gauge at Straits Point (SGSM2) indicated moderate flooding. At this stage, water covers roads on St. Georges Island, is in yards, and approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek. End time is estimated.

Coastal Flood, Anne Arundel

When
September 10, 4:06 PM EST to 6:44 PM EST
Where
Anne Arundel forecast zone
Reported by
River/Stream Gage
Coordinates
38.994, -76.568 (the zone’s center; the record gives no point)

The gauge at Annapolis (APAM2) indicated moderate flooding. At this stage, water comes up through storm drains, approaching businesses on Dock Street in Annapolis. Water also approaches the Maritime Museum and begins to cover Bowyer Road at the Naval Academy. Shoreline inundation up to one foot above ground occurs in other low lying areas.

Coastal Flood, St. Mary'S

When
September 10, 11:45 PM EST to September 11, 4:45 AM EST
Where
St. Mary'S forecast zone
Reported by
River/Stream Gage
Coordinates
38.216, -76.529 (the zone’s center; the record gives no point)

The gauge at Straits Point (SGSM2) indicated moderate flooding. At this stage, water covers roads on St. Georges Island, is in yards, and approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek. End time is estimated.

Coastal Flood, Anne Arundel

When
September 11, 4:52 AM EST to 7:12 AM EST
Where
Anne Arundel forecast zone
Reported by
River/Stream Gage
Coordinates
38.994, -76.568 (the zone’s center; the record gives no point)

The gauge at Annapolis (APAM2) indicated moderate flooding. At this stage, water comes up through storm drains, approaching businesses on Dock Street in Annapolis. Water also approaches the Maritime Museum and begins to cover Bowyer Road at the Naval Academy. Shoreline inundation up to one foot above ground occurs in other low lying areas.

Coastal Flood, St. Mary'S

When
September 11, 2:00 PM EST to 4:00 PM EST
Where
St. Mary'S forecast zone
Reported by
River/Stream Gage
Coordinates
38.216, -76.529 (the zone’s center; the record gives no point)

The gauge at Straits Point (SGSM2) indicated moderate flooding. At this stage, water covers roads on St. Georges Island, is in yards, and approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek. End time is estimated.

What these are

Coastal Flood
Flooding of coastal land by the sea, from storm surge, onshore wind or high tides.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Maryland in 2018Every state in 2018This day in weather historyWarnings in Maryland, September 2018

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 784272, 784266, 784273, 784267, 784274, 784268, 784275, 784269, 784276.