A variety of graphics showing observed data is shown in the table below.  The graphics are generated automatically and aren't always quality controlled before they are posted here. (Click the thumbnail for a larger view.) Much of the data includes radar estimates. Estimates are computed using formulas which can vary from radar to radar or from day to day. A table showing the most recent settings from each area radar can be found on our "Z/R Relationships" page. The table below contains the following information:

• Latest 1-hr Precipitation Accumulation
• Accumulated Precipitation Since Previous Synoptic Hour
• Accumulated Precipitation Since 7AM EST (8AM EDT)
• 24-hr Accumulated Precipitation During Previous 00Z-00Z Day
• 24-hr Accumulated Precipitation Ending 7AM EST (8AM EDT)
• 48-hr Accumulated Precipitation Ending 7AM EST (8AM EDT)
• 72-hr Accumulated Precipitation Ending 7AM EST (8AM EDT)
• 96-hr Accumulated Precipitation Ending 7AM EST (8AM EDT)
• Monthly Total Precipitation and Departure
• 7-Day Total Precipitation and Departure
• 30-Day Total Precipitation and Departure
• 60-Day Total Precipitation and Departure
• 90-Day Total Precipitation and Departure
• Basin Average (computed) 24-hr Precipitation
• River Gauge Plot

Data	Multi-sensor	Radar-Only	Gage-Only
Latest 1-hr Precipitation Accumulation
	These show the most recent 1-hr precipitation accumulation as computed from Multi-sensor Precipitation Estimation (MPE) software.  This software attempts to give a more accurate assessment of the "real" precipitation by merging the horizontal detail of the 88-D network with the assumed accuracy of the rain gage network.  The radar rings shown extend 230 km outward from the radar site to show the extent of radar coverage.  Only those radars used in the generation of this product are shown. Blue rings mean that the radar is operating properly, but had detected no accumulated precipitation for the hour. Green rings mean the radar contributed at least some estimated precip to the product. Red rings indicate that the radar data was not available for this hour. This product is updated hourly and usually lags a half an hour behind, e.g., precipitation for the hour ending at 10AM will generally be available by 10:30AM.  This depends on system load and areal extent of the precipitation.
Accumulated Precipitation Since Previous Synoptic Hour
	These show the most recent N-hr precipitation accumulation as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)  N represents the number of hours since the most recent synoptic hour (7 and 1 AM and PM EST, or 8 and 2 AM and PM EDT).  These products are updated hourly and lags about a half hour behind, e.g., precip ending at 10AM will generally be available by 10:30AM.
Accumulated Precipitation Since 7AM EST (8AM EDT)
	These show the most recent N-hr precipitation accumulation as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)  N represents the number of hours since 7AM EST (8AM EDT).  These products are updated hourly and lags about a half hour behind, e.g., precip ending at 10AM will generally be available by 10:30AM.  Previous hours of Multi-sensor Precipitation Estimation (MPE) information that have been edited will be reflected in this product when the next hourly iteration occurs.
24-hr Accumulated Precipitation During Previous 00Z-00Z Day (7PM to 7PM EST or 8PM to 8PM EDT)
	These show the 24-hr precipitation accumulation for the previous 24 hours (ending at 7PM EST or 8PM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 8PM EST (9PM EDT) each day.
24-hr Accumulated Precipitation Ending 12Z (7AM EST).
	These show the 24-hr precipitation accumulation for the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 8AM EST (9AM EDT) each day.
48-hr Accumulated Precipitation Ending 12Z (7AM EST).
	These show the 24-hr precipitation accumulation for the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 8AM EST (9AM EDT) each day.
72-hr Accumulated Precipitation Ending 12Z (7AM EST).
	These show the 24-hr precipitation accumulation for the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 8AM EST (9AM EDT) each day.
96-hr Accumulated Precipitation Ending 12Z (7AM EST).
	These show the 24-hr precipitation accumulation for the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 8AM EST (9AM EDT) each day.
Monthly Total Precipitation (so far)		n/a	n/a
	These show the monthy precipitation accumulation (so far) and percent of normal (so far in the month) as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
7-Day Total Precipitation		n/a	n/a
	These show the 7-day precipitation accumulation and 7-day percent of normal as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
30-Day Total Precipitation		n/a	n/a
	These show the 30-day precipitation accumulation and 30-day percent of normal as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
60-Day Total Precipitation		n/a	n/a
	These show the 60-day precipitation accumulation and 60-day percent of normal as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
90-Day Total Precipitation		n/a	n/a
	These show the 90-day precipitation accumulation and 90-day percent normal as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
180-Day Total Precipitation		n/a	n/a
	These show the 180-day precipitation accumulation and 180-day percent of normal as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
365-Day Total Precipitation		n/a	n/a
	These show the 365-day precipitation accumulation and 365-day percent of normal as of the end of the previous hydrologic day (ending at 7AM EST or 8AM EDT) as computed from Multi-sensor Precipitation Estimation (MPE) software.  (See above.)   These products are updated usually by 10AM EST 11AM EDT) each day.
Basin Average (computed) 24-hr Precipitation	Previous days	n/a	n/a
	It shows the most recent 24-hr gridded precipitation accumulation ending at 12Z as computed from Multi-sensor Precipitation Estimation (MPE) software. Then, gridded values are averaged over each of the 700+ sub-basins.   This product is usually updated by 19Z.  The data used to generate this product are retrieved from the CRWRRMxxx products that are sent out from the RFC.  They are based on hourly multi-sensor precipitation grids summed to 24 hours (see 24-hr 12Z precip above).  This is what is used in the river model as "observed" precipitation (Computed Mean Areal Precip).
River Gauge Plot
	It shows color-coded dots representing river status categories at that point, e.g., whether the stage at that point is in flood, below flood but high in its banks, or is at low or normal flow, etc. Black dots mean that the site is missing some criteria, such as Action Stage or Flood Stage, such that it cannot be determined what color the dot should be. Most of these black-dotted sites are those used for modeling only and no official flood stage (etc.) has ever been established.