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Rain & rivers

Rain expected and rain that fell, and the gauges at action stage or above in Delaware, 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.

Minor flooding

Delaware Bay at Reedy Point (IN MLLW), DE

Gauge
Tide gauge (coastal water level) · RDYD1 · NWS PHI
Observed
Not flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.
Forecast
Forecast issued · crest 7.5 ft at · below flood stage (7.2 ft) by : minor flooding
Stages
Flood (minor) 7.2 ft · Moderate 8.2 ft · Major 9.2 ft
Forecasts
Forecasts are issued routinely year-round.

Forecast hydrograph

Forecast stage at Reedy Point (IN MLLW), in ftNWS forecast for Reedy Point (IN MLLW), issued 18 Oct 06:56Z: a crest of 7.5 ft at 20 Oct 23:00Z. Flood stage is 7.2 ft; the forecast falls below it by 21 Oct 01:00Z. No recent observation at action stage or above is held.024681018 Oct 12Z19 Oct 00Z19 Oct 12Z20 Oct 00Z20 Oct 12Z21 Oct 00ZFlood (minor) 7.2 ftModerate 8.2 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. Higher stages not drawn: major 9.2 ft. Minor flooding at its worst, observed or forecast. Data: NOAA/NWPS.
The forecast points as a table
TimeStage
2.7 ft
3.9 ft
4.8 ft
5.4 ft
5.4 ft
4.8 ft
3.8 ft
3 ft
2.3 ft
2 ft
2.2 ft
2.9 ft
4.2 ft
5.4 ft
6.2 ft
6.7 ft
6.6 ft
6.1 ft
5.1 ft
4.1 ft
3.3 ft
2.7 ft
2.1 ft
2.3 ft
2.9 ft
4 ft
4.9 ft
5.5 ft
5.7 ft
5.6 ft
4.9 ft
4 ft
3 ft
2.4 ft
2.1 ft
2.4 ft
3.1 ft
4.4 ft
5.7 ft
6.4 ft
6.8 ft
6.9 ft
6.4 ft
5.5 ft
4.5 ft
3.7 ft
3.1 ft
2.6 ft
2.8 ft
3.6 ft
4.7 ft
5.6 ft
6.1 ft
6.5 ft
6.3 ft
5.7 ft
4.7 ft
3.8 ft
3.1 ft
2.8 ft
3.1 ft
3.8 ft
5.1 ft
6.2 ft
7 ft
7.5 ft
7.5 ft
6.9 ft
5.9 ft
4.9 ft
4 ft
3.3 ft

What NWS lists at this gauge

  • 7.5 ft: (MLLW) COASTAL FLOOD ADVISORY LEVEL.
  • 7.4 ft: (MLLW) Flooding begins in New Castle DE along the Strand and in the Dobbinsville section. Flooding begins along the section of DE Route 9 to the south of New Castle DE and around the approaches to the DE Route 9 bridge over the Red Lion Creek. Flooding begins in Delaware City DE including the area around the 5th Street bridge. Flooding begins in Port Penn, Augustine Beach and Bay View Beach DE. Flooding begins around the approaches to the DE Route 9 bridge over the Appoquinimink River.
  • 7.2 ft: (MLLW) MINOR 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 RDYD1 On the Live tracker’s map River flood warnings in Delaware

Rain and rivers in Delaware

  • Expected rain: below WPC’s lowest contour (0.01 in) in Delaware, 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: 0.5 to 0.75 in at its highest in Delaware, 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: 3 gauges in flood in Delaware, by NWS’s lists read . Minor flooding Murderkill River at Bowers Beach (IN MLLW), DE. Not flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast. Forecast issued · crest 6.8 ft at · below flood stage (6.6 ft) by : minor flooding. And 2 more. 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 Delaware

Three gauges in flood in Delaware, observed or forecast. Choose one for its forecast hydrograph.

Minor flooding 3

  1. Forecast: minor flooding Murderkill River at Bowers Beach (IN MLLW), DENot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · crest 6.8 ft at · below flood stage (6.6 ft) by : minor flooding
  2. Forecast: minor flooding Delaware Bay at Lewes (IN MLLW), DENot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · crest 6.6 ft at · below flood stage (6 ft) by : minor flooding
  3. Forecast: minor flooding Delaware Bay at Reedy Point (IN MLLW), DENot flooding now: observed below action stage (where officials start to act), or not reporting. Listed for its forecast.Forecast issued · crest 7.5 ft at · below flood stage (7.2 ft) by : minor flooding

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

Delaware 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.