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.
Action stage
Severn River at Annapolis (IN MLLW), MD
- Gauge
- Tide gauge (coastal water level) · APAM2 · NWS LWX
- Observed
- Not flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.
- Forecast
- Forecast issued · highest 2 ft at : action stage
- Stages
- Action 2 ft · Flood (minor) 2.6 ft · Moderate 3.3 ft · Major 5 ft
Forecast hydrograph
Impacts and the full forecast are read for gauges in flood; this one is at action stage.
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.
NWPS’s page for APAM2 On the Live tracker’s map River flood warnings in Maryland
Rain and rivers in Maryland
- Expected rain: below WPC’s lowest contour (0.01 in) 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: 0.01 to 0.1 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: no river gauge in Maryland is in flood or forecast to flood, by NWS’s lists read . Gauges are on larger rivers, not every creek: this is not a sign that nothing can flood.
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
- Flash-flood risk WPC’s Excessive Rainfall Outlook: a chance, in four categories
- Expected rain WPC’s 24-hour rain forecast, in inches
- Rain that fell MRMS’s radar estimate for the past 24 or 72 hours
River, coastal and lake gauges in Maryland
No gauge in Maryland is in flood, observed or forecast; one gauge is at action stage.
Action stage, not flooding 1
Action stage is the level at which NWS and local officials begin to act; the water is not yet at flood stage.
- Forecast: action stage Severn River at Annapolis (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 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
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.