Flooding: Maryland
Current Hydrologic Alerts for Maryland provided by the National Weather Service - Advanced Hydrologic Prediction Service

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Action (2.5 ft) - Alert - SLIM2 - Patuxent River at Solomons Island (IN MLLW) (Maryland)
Flood Categories
Primary (ft)
- Action : 2.5 ft
- Minor : 3 ft
- Moderate : 4 ft
- Major : 5 ft
Flow (secondary) data is not currently enabled for this gauge.
The forecast flood categories are the same as the observation flood categories.
Gauge Data
Observations
Latest Observation Category: NormalLatest Observation: 2.48 ftObservation Time: May 26, 2022 12:12 AM -0400Forecasts
Forecast Issued: May 25, 2022 10:54 PM -0400
Recent
Recent Category: ActionRecent Projected Forecast Available: 2.5 ftRecent Projected Forecast Time: May 26, 2022 01:00 AM -0400Highest
Highest Category: ActionHighest Projected Forecast Available: 2.5 ftHighest Projected Forecast Time: May 28, 2022 02:00 AM -0400Last
Last Category: NormalLast Projected Forecast Available: 0.8 ftLast Projected Forecast Time: May 28, 2022 09:00 PM -0400 -
Action (2.85 ft) - Alert - SGSM2 - St. George Creek at Straits Point (IN MLLW) (Maryland)
Flood Categories
Primary (ft)
- Action : 2.5 ft
- Minor : 3 ft
- Moderate : 3.5 ft
- Major : 5 ft
Flow (secondary) data is not currently enabled for this gauge.
The forecast flood categories are the same as the observation flood categories.
Gauge Data
Observations
Latest Observation Category: ActionLatest Observation: 2.85 ftObservation Time: May 26, 2022 12:00 AM -0400Forecasts
Forecast Issued: May 25, 2022 10:54 PM -0400
Recent
Recent Category: ActionRecent Projected Forecast Available: 2.5 ftRecent Projected Forecast Time: May 26, 2022 01:00 AM -0400Highest
Highest Category: ActionHighest Projected Forecast Available: 2.7 ftHighest Projected Forecast Time: May 27, 2022 12:00 AM -0400Last
Last Category: NormalLast Projected Forecast Available: 1.2 ftLast Projected Forecast Time: May 28, 2022 09:00 PM -0400 -
Action (2.55 ft) - Alert - LWTV2 - Potomac River at Lewisetta (IN MLLW) (Virginia)
Flood Categories
Primary (ft)
- Action : 2.5 ft
- Minor : 3 ft
- Moderate : 3.5 ft
- Major : 4 ft
Secondary (kcfs)
- Action : Not Set
- Minor : Not Set
- Moderate : Not Set
- Major : Not Set
The forecast flood categories are the same as the observation flood categories.
Gauge Data
Observations
Latest Observation Category: ActionLatest Observation: 2.55 ftLatest Observation (Secondary): -999 kcfsObservation Time: May 26, 2022 12:12 AM -0400Forecasts
Forecast Issued: May 25, 2022 09:09 PM -0400
Recent
Recent Category: ActionRecent Projected Forecast Available: 2.5 ftRecent Projected Forecast Available (Secondary): -999 kcfsRecent Projected Forecast Time: May 26, 2022 01:00 AM -0400Highest
Highest Category: ActionHighest Projected Forecast Available: 2.7 ftHighest Projected Forecast Available (Secondary): -999 kcfsHighest Projected Forecast Time: May 27, 2022 12:00 AM -0400Last
Last Category: NormalLast Projected Forecast Available: 2.3 ftLast Projected Forecast Available (Secondary): -999 kcfsLast Projected Forecast Time: May 29, 2022 12:00 AM -0400 -
Action (3.7 ft) - Alert - HDGM2 - Chesapeake Bay at Havre de Grace (IN MLLW) (Maryland)
Flood Categories
Primary (ft)
- Action : 3.5 ft
- Minor : 4 ft
- Moderate : 5.5 ft
- Major : 7 ft
Secondary (kcfs)
- Action : Not Set
- Minor : Not Set
- Moderate : Not Set
- Major : Not Set
The forecast flood categories are the same as the observation flood categories.
Gauge Data
Observations
Latest Observation Category: NormalLatest Observation: 1.17 ftLatest Observation (Secondary): -999 kcfsObservation Time: May 26, 2022 12:00 AM -0400Forecasts
Forecast Issued: May 25, 2022 10:54 PM -0400
Recent
Recent Category: NormalRecent Projected Forecast Available: 1.2 ftRecent Projected Forecast Available (Secondary): -999 kcfsRecent Projected Forecast Time: May 26, 2022 01:00 AM -0400Highest
Highest Category: ActionHighest Projected Forecast Available: 3.7 ftHighest Projected Forecast Available (Secondary): -999 kcfsHighest Projected Forecast Time: May 27, 2022 09:00 AM -0400Last
Last Category: NormalLast Projected Forecast Available: 2.4 ftLast Projected Forecast Available (Secondary): -999 kcfsLast Projected Forecast Time: May 28, 2022 09:00 PM -0400U.S. Geological Survey (USGS) Data and Site Info for Havre de Grace (IN MLLW): USGS ID: 01580620 -
Action (3.1 ft) - Alert - CRSM2 - Chesapeake Bay above Little Annemessex River at Crisfield MD (MLLW) (Maryland)
Flood Categories
Primary (ft)
- Action : 3 ft
- Minor : 3.5 ft
- Moderate : 4 ft
- Major : 5 ft
Secondary (kcfs)
- Action : Not Set
- Minor : Not Set
- Moderate : Not Set
- Major : Not Set
The forecast flood categories are the same as the observation flood categories.
Gauge Data
Observations
Latest Observation Category: NormalLatest Observation: 2.5 ftLatest Observation (Secondary): -999 kcfsObservation Time: May 26, 2022 12:00 AM -0400Forecasts
Forecast Issued: May 25, 2022 09:09 PM -0400
Recent
Recent Category: NormalRecent Projected Forecast Available: 2.3 ftRecent Projected Forecast Available (Secondary): -999 kcfsRecent Projected Forecast Time: May 26, 2022 01:00 AM -0400Highest
Highest Category: ActionHighest Projected Forecast Available: 3.1 ftHighest Projected Forecast Available (Secondary): -999 kcfsHighest Projected Forecast Time: May 26, 2022 11:00 PM -0400Last
Last Category: NormalLast Projected Forecast Available: 2.8 ftLast Projected Forecast Available (Secondary): -999 kcfsLast Projected Forecast Time: May 29, 2022 12:00 AM -0400U.S. Geological Survey (USGS) Data and Site Info for Little Annemessex River at Crisfield MD (MLLW): USGS ID: 01485755