TidalMapNassawango Creek near Snow Hill, MD Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.
Last 30 days
About this gauge
USGS gauge 01485500 sits on Nassawango Creek and reads everything draining 45 square miles of the Pokomoke-Western Lower Delmarva basin. Its datum sits 11 feet above sea level NAVD88. Daily flow has been on record here since 1950, 75 years of it.
Normal flows here
Nassawango Creek runs a median of 20 cfs at this gauge across 75 years of record. March is the fullest month at a median 67 cfs, and July the leanest at 6.0 cfs. The highest daily mean on record is 2,630 cfs in 2016, and the lowest is 0.7 cfs in 2011.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 54 cfs | 277% |
| Feb | 61 cfs | 313% |
| Mar | 67 cfs | 344% |
| Apr | 46 cfs | 236% |
| May | 23 cfs | 118% |
| Jun | 12 cfs | 64% |
| Jul | 6.0 cfs | 31% |
| Aug | 7.4 cfs | 38% |
| Sep | 6.2 cfs | 32% |
| Oct | 8.2 cfs | 42% |
| Nov | 15 cfs | 77% |
| Dec | 36 cfs | 185% |
Medians from the USGS daily-statistics record, 1950 to 2025. A month at 100% is running at its own long-term median.
Flood stages and record crests
Nassawango Creek reaches flood stage at this gauge at 6.5 feet. NWS starts watching it at 6 feet. The highest crest on record is 9.1 feet, in August 1989.
| Category | Gage height |
|---|---|
| Action | 6 ft |
| Minor flooding | 6.5 ft |
| Moderate flooding | 7.5 ft |
| Major flooding | 8.5 ft |
| When | Crest |
|---|---|
| August 1989 | 9.1 ft |
| September 2016 | 8.9 ft |
| January 1998 | 8.1 ft |
| May 2018 | 8.1 ft |
| February 1979 | 8 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge NSWM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
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- Pocomoke River near Willards, MD
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- St Marys River at Great Mills, MD
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- Mcintosh Run near Leonardtown, MD
Live streamflow and gage height: USGS gauge 01485500. Percentile context computed against the gauge's period of record. Not for navigation.
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