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| 7.0 |
SIGNIFICANT FLOODING WILL AFFECT INTERESTS ALONG THE RIVER IN MAYNARD...CONCORD AND HUDSON. ROADWAYS
MAY BECOME IMPASSABLE DUE TO FLOOD WATERS AND SOME PROPERTIES MAY NEED TO BE EVACUATED. FOLLOW THE DIRECTIONS OF LOCAL EMERGENCY MANAGEMENT OFFICALS.
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| 6.0 |
FLOODING IS LIKELY IN LOW LYING SECTIONS ALONG THE RIVER INCLUDING PORTIONS OF MAYNARD...HUDSON AND CONCORD. WATER MAY APPROACH HOMES ALONG THE RIVER AND MAY FORCE SEVERAL LOCALIZED ROAD CLOSURES. |
| 5.0 |
MINOR LOWLAND AND BACKYARD FLOODING IS LIKELY ALONG REACHES OF THE RIVER IN MAYNARD...CONCORD AS WELL AS HUDSON. SEVERAL RIVER ROADS MAY ALSO BECOME COVERED IN WATER. |
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Latitude: 42.431900° N,
Longitude: 71.450300° W,
Horizontal Datum:
NAD83
River Stage
Reference Frame |
Gauge Height |
Flood Stage |
Uses |
| NWS stage |
0 ft |
5 ft |
Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps |
| Vertical Datum |
Elevation
(gauge height = 0) |
Elevation
(gauge height = flood stage) |
Elevation information source |
| NAVD88 |
N/A |
N/A |
Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps |
| NGVD 29 |
N/A |
N/A |
Older USGS topographic maps, NGVD29 benchmarks |
| MSL |
N/A |
N/A |
Older USGS topographic maps, MSL benchmarks |
| Other |
NULL |
NULL |
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Hydrologic Resources
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Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here. |
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NWS Information |
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weather.gov 
