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Hydrograph River at a Glance Download
Merrimack River at Lowell Stage (ft)Flow (kcfs)Highest Observation: 48.66 ft at 12:15PM Apr 20, 2014Observed: 48.65 ft at 12:30PM Apr 20, 2014Observed: 48.64 ft at 12:45PM Apr 20, 2014Observed: 48.62 ft at 1:00PM Apr 20, 2014Observed: 48.61 ft at 1:15PM Apr 20, 2014Observed: 48.6 ft at 1:30PM Apr 20, 2014Observed: 48.59 ft at 1:45PM Apr 20, 2014Observed: 48.58 ft at 2:00PM Apr 20, 2014Observed: 48.57 ft at 2:15PM Apr 20, 2014Observed: 48.55 ft at 2:30PM Apr 20, 2014Observed: 48.52 ft at 2:45PM Apr 20, 2014Observed: 48.51 ft at 3:00PM Apr 20, 2014Observed: 48.51 ft at 3:15PM Apr 20, 2014Observed: 48.49 ft at 3:30PM Apr 20, 2014Observed: 48.48 ft at 3:45PM Apr 20, 2014Observed: 48.48 ft at 4:00PM Apr 20, 2014Observed: 48.47 ft at 4:15PM Apr 20, 2014Observed: 48.45 ft at 4:30PM Apr 20, 2014Observed: 48.44 ft at 4:45PM Apr 20, 2014Observed: 48.43 ft at 5:00PM Apr 20, 2014Observed: 48.42 ft at 5:15PM Apr 20, 2014Observed: 48.41 ft at 5:30PM Apr 20, 2014Observed: 48.4 ft at 5:45PM Apr 20, 2014Observed: 48.38 ft at 6:00PM Apr 20, 2014Observed: 48.38 ft at 6:15PM Apr 20, 2014Observed: 48.37 ft at 6:30PM Apr 20, 2014Observed: 48.36 ft at 6:45PM Apr 20, 2014Observed: 48.35 ft at 7:00PM Apr 20, 2014Observed: 48.34 ft at 7:15PM Apr 20, 2014Observed: 48.33 ft at 7:30PM Apr 20, 2014Observed: 48.32 ft at 7:45PM Apr 20, 2014Observed: 48.32 ft at 8:00PM Apr 20, 2014Observed: 48.3 ft at 8:15PM Apr 20, 2014Observed: 48.29 ft at 8:30PM Apr 20, 2014Observed: 48.28 ft at 8:45PM Apr 20, 2014Observed: 48.28 ft at 9:00PM Apr 20, 2014Observed: 48.27 ft at 9:15PM Apr 20, 2014Observed: 48.26 ft at 9:30PM Apr 20, 2014Observed: 48.25 ft at 9:45PM Apr 20, 2014Observed: 48.24 ft at 10:00PM Apr 20, 2014Observed: 48.23 ft at 10:15PM Apr 20, 2014Observed: 48.22 ft at 10:30PM Apr 20, 2014Observed: 48.21 ft at 10:45PM Apr 20, 2014Observed: 48.2 ft at 11:00PM Apr 20, 2014Observed: 48.19 ft at 11:15PM Apr 20, 2014Observed: 48.18 ft at 11:30PM Apr 20, 2014Observed: 48.17 ft at 11:45PM Apr 20, 2014Observed: 48.16 ft at 12:00AM Apr 21, 2014Observed: 48.15 ft at 12:15AM Apr 21, 2014Observed: 48.14 ft at 12:30AM Apr 21, 2014Observed: 48.12 ft at 12:45AM Apr 21, 2014Observed: 48.11 ft at 1:00AM Apr 21, 2014Observed: 48.1 ft at 1:15AM Apr 21, 2014Observed: 48.09 ft at 1:30AM Apr 21, 2014Observed: 48.08 ft at 1:45AM Apr 21, 2014Observed: 48.07 ft at 2:00AM Apr 21, 2014Observed: 48.06 ft at 2:15AM Apr 21, 2014Observed: 48.04 ft at 2:30AM Apr 21, 2014Observed: 48.03 ft at 2:45AM Apr 21, 2014Observed: 48.03 ft at 2:46AM Apr 21, 2014Observed: 48.02 ft at 3:00AM Apr 21, 2014Observed: 48 ft at 3:15AM Apr 21, 2014Observed: 48 ft at 3:30AM Apr 21, 2014Observed: 47.98 ft at 3:45AM Apr 21, 2014Observed: 47.97 ft at 4:00AM Apr 21, 2014Observed: 47.96 ft at 4:15AM Apr 21, 2014Observed: 47.95 ft at 4:30AM Apr 21, 2014Observed: 47.93 ft at 4:45AM Apr 21, 2014Observed: 47.91 ft at 5:00AM Apr 21, 2014Observed: 47.89 ft at 5:15AM Apr 21, 2014Observed: 47.88 ft at 5:30AM Apr 21, 2014Observed: 47.87 ft at 5:45AM Apr 21, 2014Observed: 47.85 ft at 6:00AM Apr 21, 2014Observed: 47.84 ft at 6:15AM Apr 21, 2014Observed: 47.82 ft at 6:30AM Apr 21, 2014Observed: 47.81 ft at 6:45AM Apr 21, 2014Observed: 47.79 ft at 7:00AM Apr 21, 2014Observed: 47.78 ft at 7:15AM Apr 21, 2014Observed: 47.76 ft at 7:30AM Apr 21, 2014Observed: 47.67 ft at 7:45AM Apr 21, 2014Observed: 47.67 ft at 8:00AM Apr 21, 2014Observed: 47.66 ft at 8:15AM Apr 21, 2014Observed: 47.71 ft at 8:30AM Apr 21, 2014Observed: 47.72 ft at 8:45AM Apr 21, 2014Observed: 47.72 ft at 8:46AM Apr 21, 2014Observed: 47.72 ft at 9:00AM Apr 21, 2014Observed: 47.71 ft at 9:15AM Apr 21, 2014Observed: 47.7 ft at 9:30AM Apr 21, 2014Observed: 47.68 ft at 9:45AM Apr 21, 2014Observed: 47.67 ft at 10:00AM Apr 21, 2014Observed: 47.65 ft at 10:15AM Apr 21, 2014Observed: 47.64 ft at 10:30AM Apr 21, 2014Observed: 47.62 ft at 10:45AM Apr 21, 2014Observed: 47.6 ft at 11:00AM Apr 21, 2014Observed: 47.59 ft at 11:15AM Apr 21, 2014Observed: 47.58 ft at 11:30AM Apr 21, 2014Observed: 47.56 ft at 11:45AM Apr 21, 2014Observed: 47.55 ft at 12:00PM Apr 21, 2014Observed: 47.54 ft at 12:15PM Apr 21, 2014Observed: 47.53 ft at 12:30PM Apr 21, 2014Observed: 47.52 ft at 12:45PM Apr 21, 2014Observed: 47.51 ft at 1:00PM Apr 21, 2014Observed: 47.49 ft at 1:15PM Apr 21, 2014Observed: 47.48 ft at 1:30PM Apr 21, 2014Observed: 47.47 ft at 1:45PM Apr 21, 2014Observed: 47.46 ft at 2:00PM Apr 21, 2014Observed: 47.45 ft at 2:15PM Apr 21, 2014Observed: 47.44 ft at 2:30PM Apr 21, 2014Observed: 47.42 ft at 2:45PM Apr 21, 2014Observed: 47.42 ft at 2:46PM Apr 21, 2014Observed: 47.4 ft at 3:00PM Apr 21, 2014Observed: 47.39 ft at 3:15PM Apr 21, 2014Observed: 47.35 ft at 3:30PM Apr 21, 2014Observed: 47.35 ft at 3:45PM Apr 21, 2014Observed: 47.33 ft at 4:00PM Apr 21, 2014Observed: 47.31 ft at 4:15PM Apr 21, 2014Observed: 47.29 ft at 4:30PM Apr 21, 2014Observed: 47.28 ft at 4:45PM Apr 21, 2014Observed: 47.26 ft at 5:00PM Apr 21, 2014Observed: 47.26 ft at 5:15PM Apr 21, 2014Observed: 47.24 ft at 5:30PM Apr 21, 2014Observed: 47.23 ft at 5:45PM Apr 21, 2014Observed: 47.22 ft at 6:00PM Apr 21, 2014Observed: 47.22 ft at 6:15PM Apr 21, 2014Observed: 47.2 ft at 6:30PM Apr 21, 2014Observed: 47.19 ft at 6:45PM Apr 21, 2014Observed: 47.19 ft at 7:00PM Apr 21, 2014Observed: 47.18 ft at 7:15PM Apr 21, 2014Observed: 47.18 ft at 7:30PM Apr 21, 2014Observed: 47.17 ft at 7:45PM Apr 21, 2014Observed: 47.16 ft at 8:00PM Apr 21, 2014Observed: 47.15 ft at 8:15PM Apr 21, 2014Observed: 47.14 ft at 8:30PM Apr 21, 2014Observed: 47.14 ft at 8:45PM Apr 21, 2014Observed: 47.14 ft at 8:46PM Apr 21, 2014Observed: 47.14 ft at 9:00PM Apr 21, 2014Observed: 47.12 ft at 9:15PM Apr 21, 2014Observed: 47.11 ft at 9:30PM Apr 21, 2014Observed: 47.11 ft at 9:45PM Apr 21, 2014Observed: 47.1 ft at 10:00PM Apr 21, 2014Observed: 47.09 ft at 10:15PM Apr 21, 2014Observed: 47.09 ft at 10:30PM Apr 21, 2014Observed: 47.07 ft at 10:45PM Apr 21, 2014Observed: 47.06 ft at 11:00PM Apr 21, 2014Observed: 47.06 ft at 11:15PM Apr 21, 2014Observed: 47.05 ft at 11:30PM Apr 21, 2014Observed: 47.04 ft at 11:45PM Apr 21, 2014Observed: 47.03 ft at 12:00AM Apr 22, 2014Observed: 47.02 ft at 12:15AM Apr 22, 2014Observed: 47 ft at 12:30AM Apr 22, 2014Observed: 47 ft at 12:45AM Apr 22, 2014Observed: 46.99 ft at 1:00AM Apr 22, 2014Observed: 46.97 ft at 1:15AM Apr 22, 2014Observed: 46.95 ft at 1:30AM Apr 22, 2014Observed: 46.95 ft at 1:45AM Apr 22, 2014Observed: 46.95 ft at 2:00AM Apr 22, 2014Observed: 46.94 ft at 2:15AM Apr 22, 2014Observed: 46.92 ft at 2:30AM Apr 22, 2014Observed: 46.92 ft at 2:45AM Apr 22, 2014Observed: 46.92 ft at 2:46AM Apr 22, 2014Observed: 46.91 ft at 3:00AM Apr 22, 2014Observed: 46.89 ft at 3:15AM Apr 22, 2014Observed: 46.87 ft at 3:30AM Apr 22, 2014Observed: 46.86 ft at 3:45AM Apr 22, 2014Observed: 46.84 ft at 4:00AM Apr 22, 2014Observed: 46.83 ft at 4:15AM Apr 22, 2014Observed: 46.82 ft at 4:30AM Apr 22, 2014Observed: 46.8 ft at 4:45AM Apr 22, 2014Observed: 46.79 ft at 5:00AM Apr 22, 2014Observed: 46.79 ft at 5:15AM Apr 22, 2014Observed: 46.77 ft at 5:30AM Apr 22, 2014Observed: 46.77 ft at 5:45AM Apr 22, 2014Observed: 46.76 ft at 6:00AM Apr 22, 2014Observed: 46.76 ft at 6:15AM Apr 22, 2014Observed: 46.73 ft at 6:30AM Apr 22, 2014Observed: 46.73 ft at 6:45AM Apr 22, 2014Observed: 46.72 ft at 7:00AM Apr 22, 2014Observed: 46.7 ft at 7:15AM Apr 22, 2014Observed: 46.69 ft at 7:30AM Apr 22, 2014Observed: 46.68 ft at 7:45AM Apr 22, 2014Observed: 46.67 ft at 8:00AM Apr 22, 2014Observed: 46.65 ft at 8:15AM Apr 22, 2014Observed: 46.65 ft at 8:30AM Apr 22, 2014Observed: 46.63 ft at 8:45AM Apr 22, 2014Observed: 46.63 ft at 9:00AM Apr 22, 2014Observed: 46.62 ft at 9:15AM Apr 22, 2014Observed: 46.61 ft at 9:30AM Apr 22, 2014Observed: 46.6 ft at 9:45AM Apr 22, 2014Observed: 46.57 ft at 10:00AM Apr 22, 2014Observed: 46.56 ft at 10:15AM Apr 22, 2014Observed: 46.55 ft at 10:30AM Apr 22, 2014Observed: 46.53 ft at 10:45AM Apr 22, 2014Observed: 46.52 ft at 11:00AM Apr 22, 2014Observed: 46.51 ft at 11:15AM Apr 22, 2014Observed: 46.49 ft at 11:30AM Apr 22, 2014Observed: 46.47 ft at 11:45AM Apr 22, 2014Observed: 46.48 ft at 12:00PM Apr 22, 2014Observed: 46.47 ft at 12:15PM Apr 22, 2014Observed: 46.48 ft at 12:30PM Apr 22, 2014Observed: 46.48 ft at 12:45PM Apr 22, 2014Observed: 46.47 ft at 1:00PM Apr 22, 2014Observed: 46.45 ft at 1:15PM Apr 22, 2014Observed: 46.42 ft at 1:30PM Apr 22, 2014Observed: 46.43 ft at 1:45PM Apr 22, 2014Observed: 46.48 ft at 2:00PM Apr 22, 2014Observed: 46.5 ft at 2:15PM Apr 22, 2014Observed: 46.5 ft at 2:30PM Apr 22, 2014Observed: 46.49 ft at 2:45PM Apr 22, 2014Observed: 46.49 ft at 2:46PM Apr 22, 2014Observed: 46.48 ft at 3:00PM Apr 22, 2014Observed: 46.48 ft at 3:15PM Apr 22, 2014Observed: 46.48 ft at 3:30PM Apr 22, 2014Observed: 46.52 ft at 3:45PM Apr 22, 2014Observed: 46.56 ft at 4:00PM Apr 22, 2014Observed: 46.6 ft at 4:15PM Apr 22, 2014Observed: 46.64 ft at 4:30PM Apr 22, 2014Observed: 46.65 ft at 4:45PM Apr 22, 2014Observed: 46.62 ft at 5:00PM Apr 22, 2014Observed: 46.62 ft at 5:15PM Apr 22, 2014Observed: 46.6 ft at 5:30PM Apr 22, 2014Observed: 46.58 ft at 5:45PM Apr 22, 2014Observed: 46.55 ft at 6:00PM Apr 22, 2014Observed: 46.53 ft at 6:15PM Apr 22, 2014Observed: 46.52 ft at 6:30PM Apr 22, 2014Observed: 46.51 ft at 6:45PM Apr 22, 2014Observed: 46.49 ft at 7:00PM Apr 22, 2014Observed: 46.48 ft at 7:15PM Apr 22, 2014Observed: 46.47 ft at 7:30PM Apr 22, 2014Observed: 46.46 ft at 7:45PM Apr 22, 2014Observed: 46.45 ft at 8:00PM Apr 22, 2014Observed: 46.45 ft at 8:15PM Apr 22, 2014Observed: 46.43 ft at 8:30PM Apr 22, 2014Observed: 46.42 ft at 8:45PM Apr 22, 2014Observed: 46.41 ft at 9:00PM Apr 22, 2014Observed: 46.39 ft at 9:15PM Apr 22, 2014Observed: 46.39 ft at 9:30PM Apr 22, 2014Observed: 46.38 ft at 9:45PM Apr 22, 2014Observed: 46.38 ft at 10:00PM Apr 22, 2014Observed: 46.36 ft at 10:15PM Apr 22, 2014Observed: 46.35 ft at 10:30PM Apr 22, 2014Observed: 46.35 ft at 10:45PM Apr 22, 2014Observed: 46.34 ft at 11:00PM Apr 22, 2014Observed: 46.33 ft at 11:15PM Apr 22, 2014Observed: 46.33 ft at 11:30PM Apr 22, 2014Observed: 46.31 ft at 11:45PM Apr 22, 2014Observed: 46.31 ft at 12:00AM Apr 23, 2014Observed: 46.31 ft at 12:15AM Apr 23, 2014Observed: 46.3 ft at 12:30AM Apr 23, 2014Observed: 46.29 ft at 12:45AM Apr 23, 2014Observed: 46.29 ft at 1:00AM Apr 23, 2014Observed: 46.29 ft at 1:15AM Apr 23, 2014Observed: 46.28 ft at 1:30AM Apr 23, 2014Observed: 46.28 ft at 1:45AM Apr 23, 2014Observed: 46.27 ft at 2:00AM Apr 23, 2014Observed: 46.25 ft at 2:15AM Apr 23, 2014Observed: 46.25 ft at 2:30AM Apr 23, 2014Observed: 46.23 ft at 2:45AM Apr 23, 2014Observed: 46.23 ft at 3:00AM Apr 23, 2014Observed: 46.23 ft at 3:01AM Apr 23, 2014Observed: 46.23 ft at 3:15AM Apr 23, 2014Observed: 46.23 ft at 3:30AM Apr 23, 2014Observed: 46.22 ft at 3:45AM Apr 23, 2014Observed: 46.22 ft at 4:00AM Apr 23, 2014Observed: 46.22 ft at 4:15AM Apr 23, 2014Observed: 46.21 ft at 4:30AM Apr 23, 2014Observed: 46.21 ft at 4:45AM Apr 23, 2014Observed: 46.2 ft at 5:00AM Apr 23, 2014Observed: 46.2 ft at 5:15AM Apr 23, 2014Observed: 46.19 ft at 5:30AM Apr 23, 2014Observed: 46.19 ft at 5:45AM Apr 23, 2014Observed: 46.19 ft at 6:00AM Apr 23, 2014Observed: 46.18 ft at 6:15AM Apr 23, 2014Observed: 46.19 ft at 6:30AM Apr 23, 2014Observed: 46.18 ft at 6:45AM Apr 23, 2014Observed: 46.18 ft at 7:00AM Apr 23, 2014Observed: 46.18 ft at 7:15AM Apr 23, 2014Observed: 46.18 ft at 7:30AM Apr 23, 2014Observed: 46.19 ft at 7:45AM Apr 23, 2014Observed: 46.2 ft at 8:00AM Apr 23, 2014Observed: 46.19 ft at 8:15AM Apr 23, 2014Observed: 46.2 ft at 8:30AM Apr 23, 2014Observed: 46.2 ft at 8:45AM Apr 23, 2014Observed: 46.2 ft at 9:00AM Apr 23, 2014Observed: 46.2 ft at 9:01AM Apr 23, 2014Observed: 46.21 ft at 9:15AM Apr 23, 2014Observed: 46.23 ft at 9:30AM Apr 23, 2014Observed: 46.22 ft at 9:45AM Apr 23, 2014Observed: 46.18 ft at 10:00AM Apr 23, 2014Observed: 46.15 ft at 10:15AM Apr 23, 2014Observed: 46.13 ft at 10:30AM Apr 23, 2014Highest Forecast: 46.1 ft 2:00PM Apr 23, 2014Highest Forecast: 46.1 ft 8:00PM Apr 23, 2014Highest Forecast: 46.1 ft 2:00AM Apr 24, 2014Highest Forecast: 46.1 ft 8:00AM Apr 24, 2014Highest Forecast: 46.1 ft 2:00PM Apr 24, 2014Highest Forecast: 46.1 ft 8:00PM Apr 24, 2014Forecast: 46 ft 2:00AM Apr 25, 2014Forecast: 46 ft 8:00AM Apr 25, 2014Forecast: 46 ft 2:00PM Apr 25, 2014Forecast: 45.9 ft 8:00PM Apr 25, 2014Forecast: 45.8 ft 2:00AM Apr 26, 2014Forecast: 45.8 ft 8:00AM Apr 26, 2014USGS--Water Resources of the United StatesLOWM3(plotting HGIRG) Graph Created (12:00PM Apr 23, 2014)ObservedForecast (issued 11:04AM Apr 23)Latest observed value: 46.13 ft at 10:30 AM EDT 23-Apr-2014. Flood Stage is 52 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Merrimack River at Lowell are issued routinely year-round.
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Upstream Gauge - at Nashua Upstream Gauge Downstream Gauge Downstream Gauge - at Lawrence
Flood Categories (in feet)
Major Flood Stage:58
Moderate Flood Stage:54
Flood Stage:52
Action Stage:50

Historical Crests
(1) 68.40 ft on 03/20/1936
(2) 60.60 ft on 04/23/1852
(3) 60.57 ft on 09/23/1938
(4) 58.84 ft on 05/15/2006
(5) 58.09 ft on 04/17/2007
Show More Historical Crests

Low Water Records
Zoom Level: 16
Gauge Location
Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
 
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
65 THIS IS A SERIOUS FLOOD EVENT. ALL PERSONS ALONG THE MERRIMACK RIVER SHOULD FOLLOW THE EVACUATION RECOMMENDATIONS FROM YOUR LOCAL EMERGENCY MANAGEMANT OFFICIALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. ALL FLOOD PROTECTION MEASURES MUST BE RUSHED TO COMPLETION IN FLOOD PRONE AREAS.
62 THIS IS A SERIOUS FLOOD EVENT. ALL PERSONS ALONG THE MERRIMACK RIVER SHOULD FOLLOW THE EVACUATION RECOMMENDATIONS FROM YOUR LOCAL EMERGENCY MANAGEMANT OFFICIALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. ALL FLOOD PROTECTION MEASURES MUST BE RUSHED TO COMPLETION IN FLOOD PRONE AREAS.
60 THIS IS A SERIOUS FLOOD EVENT. ALL PERSONS ALONG THE MERRIMACK RIVER FROM THE MASSACHUSETTS BORDERTHROUGH LAWRENCE AND HAVERHILL SHOULD FOLLOW THE EVACUATION RECOMMENDATIONS FROM YOUR LOCAL EMERGENCY MANAGEMANT OFFICIALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. ALL FLOOD PROTECTION MEASURES MUST BE RUSHED TO COMPLETION IN FLOOD PRONE AREAS.
58 FLOODING IS EXPECTED TO OVERSPREAD PORTIONS OF ROUTE 113 ABOVE THE PAWTUCKET FALLS. ALSO...PORTIONS OF ROUTE 110 AND SEVERAL HOMES AND BUSINESSES ALONG ROUTE 110 HEADING NORTH AND EAST INTO TEWKSBURY MAY BEGIN TO EXPERIENCE FLOODING. FOLLOW THE DIRECTION OF YOUR LOCAL EMERGENCY MANAGEMENT OFFICALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY.
56 FLOODING WILL BECOME MORE WIDESPREAD FROM THE NEW HAMPSHIRE BORDER THROUGH HAVERHILL. THOSE AREAS OUTSIDE LOCAL FLOOD PROTECTION SHOULD TAKE MEASURES TO PROTECT PROPERTY. FOLLOW THE DIRECTIONS OF YOUR LOCAL EMERGENCY MANAGEMENT AGENCY.
55 FLOODING WILL BECOME MORE WIDESPREAD FROM THE NEW HAMPSHIRE BORDER THROUGH HAVERHILL. THOSE AREAS OUTSIDE LOCAL FLOOD PROTECTION SHOULD TAKE MEASURES TO PROTECT PROPERTY. FOLLOW THE DIRECTIONS OF YOUR LOCAL EMERGENCY MANAGEMENT AGENCY.
52 LOWLAND FLOODING IS LIKELY ALONG THE MERRIMACK RIVER. MOST OF THE IMPACT WILL BE FELT BY BUSINESSES AND MILLS WHERE BASEMENT FLOODING IS LIKELY.
About This Location Collapse

Latitude: 42.645833° N, Longitude: 71.298889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 52 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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:

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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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Page last modified: 8-Apr-2014 8:36 AM
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