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Rain & rivers

Rain expected and rain that fell, and the gauges at action stage or above in Maryland, each with NWS’s forecast. Flood warnings are the Live tracker’s.

Observed gauges / Forecast gauges / NWS warnings: feeds current

Observed gauges: Feed current; checked .

Forecast gauges: Feed current; checked .

NWS warnings: Feed current; checked .

Checked means retrieved, not newly issued. Each graphic retains its issue, observation, initialization or valid time. Site publishing status is separate.

Moderate flooding

Atlantic Coast at OCEAN CITY INLET (IN MLLW), MD

Gauge
Tide gauge (coastal water level) · OCIM2 · NWS AKQ
Observed
Not flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.
Forecast
Forecast issued · crest 4.6 ft at · below flood stage (4 ft) by : moderate flooding
Stages
Action 3.5 ft · Flood (minor) 4 ft · Moderate 4.5 ft · Major 5.5 ft
Forecasts
Forecasts are issued routinely year-round.

Forecast hydrograph

Forecast stage at OCEAN CITY INLET (IN MLLW), in ftNWS forecast for OCEAN CITY INLET (IN MLLW), issued 16 Oct 17:31Z: a crest of 4.6 ft at 19 Oct 19:00Z. Flood stage is 4 ft; the forecast falls below it by 19 Oct 23:00Z. No recent observation at action stage or above is held.024617 Oct 00Z18 Oct 00Z19 Oct 00Z20 Oct 00ZAction 3.5 ftFlood (minor) 4 ftModerate 4.5 ftMajor 5.5 ftNowUTCft
NWS forecast, issued : the line is the forecast stage, each dot one of NWS’s points; the ringed dot is the latest observation, when one at action stage or above is held. Earlier observations are not held here, so no observed line is drawn. Moderate flooding at its worst, observed or forecast. Data: NOAA/NWPS.
The forecast points as a table
TimeStage
3.2 ft
3.1 ft
2.9 ft
2.5 ft
2.1 ft
1.8 ft
1.6 ft
1.6 ft
1.7 ft
2 ft
2.2 ft
2.4 ft
2.3 ft
2.2 ft
2 ft
1.8 ft
1.5 ft
1.4 ft
1.4 ft
1.6 ft
1.9 ft
2.3 ft
2.8 ft
3 ft
3.3 ft
3.5 ft
3.2 ft
3 ft
2.7 ft
2.5 ft
2.2 ft
2.1 ft
2.3 ft
2.5 ft
2.8 ft
3 ft
3.4 ft
3.4 ft
3.2 ft
3.1 ft
2.8 ft
2.5 ft
2.3 ft
2.4 ft
2.5 ft
2.9 ft
3.2 ft
3.7 ft
3.9 ft
4 ft
4 ft
3.9 ft
3.6 ft
3.3 ft
3 ft
2.8 ft
2.6 ft
2.8 ft
3.1 ft
3.4 ft
3.6 ft
3.7 ft
3.8 ft
3.8 ft
3.6 ft
3.3 ft
3.1 ft
2.9 ft
3 ft
3.1 ft
3.5 ft
3.8 ft
4.1 ft
4.5 ft
4.6 ft
4.6 ft
4.5 ft
4.2 ft
3.9 ft
3.6 ft
3.4 ft
3.5 ft
3.6 ft
3.9 ft

What NWS lists at this gauge

  • 4 ft: Shallow flooding is expected in the most vulnerable locations near the waterfront and shoreline resulting in a low threat of property damage. Expect up to one foot of water above ground level in low lying, vulnerable areas. Some roads and low lying property including parking lots, parks and lawns near the waterfront will experience shallow flooding.

NWS’s statements for this gauge’s water at each stage, up to the highest observed or forecast. A gauge does not say whether a particular road or neighbourhood near it floods. Read .

NWPS’s page for OCIM2 On the Live tracker’s map River flood warnings in Maryland

Rain and rivers in Maryland

  • Expected rain: 0.75 in or more at its highest in Maryland, in WPC’s forecast for the 24 hours to . An amount for the area its contour covers, not a total for any one street.
  • Rain that fell: 2 to 3 in at its highest in Maryland, in the 24 hours to , by MRMS’s radar estimate over a grid about 5 km across: a measurement of the past, not corrected to rain gauges.
  • Rivers: 1 gauge in flood in Maryland, by NWS’s lists read . Moderate flooding Atlantic Coast at OCEAN CITY INLET (IN MLLW), MD. Not flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast. Forecast issued · crest 4.6 ft at · below flood stage (4 ft) by : moderate flooding. A gauge measures its river at that spot, not whether a road or a neighbourhood floods.

Three sources, each its own window. None is a chance of flash flooding, which is WPC’s outlook above; a flash flood is a warning’s. Gauges in the Live tracker

On the Briefing’s map

River, coastal and lake gauges in Maryland

One gauge in flood in Maryland, observed or forecast. Choose one for its forecast hydrograph.

Moderate flooding 1

  1. Forecast: moderate flooding Atlantic Coast at OCEAN CITY INLET (IN MLLW), MDNot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · crest 4.6 ft at · below flood stage (4 ft) by : moderate flooding
Action stage, not flooding 7

Action stage is the level at which NWS and local officials begin to act; the water is not yet at flood stage.

  1. Observed: action stage Severn River at Annapolis (IN MLLW), MDObserved 2.58 ft at : action stageForecast issued · highest 2.5 ft at : action stage
  2. Observed: action stage Northwest Branch Patapsco River at Baltimore/Fort McHenry (IN MLLW), MDObserved 2.55 ft at : action stageForecast issued · highest 2.6 ft at : action stage
  3. Forecast: action stage Chesapeake Bay at Bishops Head (IN MLLW), MDNot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · highest 3.1 ft at : action stage
  4. Observed: action stage Chesapeake Bay at Cambridge (IN MLLW), MDObserved 3.08 ft at : action stage
  5. Forecast: action stage Chesapeake Bay at Little Annemessex River at Crisfield MD (MLLW), MDNot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · highest 3.4 ft at : action stage
  6. Forecast: action stage Patuxent River at Solomons Island (IN MLLW), MDNot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · highest 2.8 ft at : action stage
  7. Forecast: action stage St. George Creek at Straits Point (IN MLLW), MDNot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · highest 3.1 ft at : action stage

A gauge measures its water at that one place. Flash flooding, which comes in hours from heavy rain, is in the warnings as Flash Flood Warnings; a river can be in flood with no rain falling.

Gauges observed checked · Data: NOAA/NWS

Gauges forecast checked · Data: NOAA/NWS

Gauge impacts and forecasts checked · Data: NOAA/NWPS

Maryland flash-flood briefing

Not an official warning service. Warnings and watches are the National Weather Service’s, outlooks and reports the Storm Prediction Center’s and the Weather Prediction Center’s (Data: NOAA/NWS, NOAA/SPC, NOAA/WPC). When a warning is issued for you, act on it, and use weather.gov or a NOAA Weather Radio for where you are.