NWS PRECIPITATION TOTALS MANUAL

Percent of normal and departure from normal comparisons are also available by comparing the QPE data with the PRISM normal data. Normal precipitation data are also produced for the same daily and multi-day summations using data from the PRISM Climate Group. These 24-hour data are then summed together to produce multi-day precipitation totals. The individual daily data products represent a 24 hour total ending at 12UTC on the indicated date. The QPEs from each RFC are combined into a single mosaic to create a QPE product that covers the lower 48 states, Alaska and Puerto Rico. These QPEs are used as input into their hydrologic models to produce NWS river forecasts and guidance products.

Water Year to Date Percent of Normal (256)Дescription: The 13 National Weather Service (NWS) River Forecast Centers (RFC) produce Quantitative Precipitation Estimates (QPE) for their individual RFC areas.

Water Year to Date Departure from Normal (203).

Year to Date Departure from Normal (199).

Month to Date Departure from Normal (195).

Last 365 Days Departure from Normal (191).

Last 180 Days Departure from Normal (187).

Last 120 Days Departure from Normal (183).

Last 90 Days Departure from Normal (179).

Last 60 Days Departure from Normal (175).

Last 30 Days Departure from Normal (171).

Last 14 Days Departure from Normal (167).

Last 10 Days Departure from Normal (163).

Last 7 Days Departure from Normal (159).

Map Name: River Forecast Centers Quantative Precipitation Estimates (QPE) Legend All Layers and Tables Dynamic Legend Dynamic All Layers Layers: The daily data may be updated several times between 12UTC and 21UTC each day as updated data becomes available.

Normal precipitation data are also produced for the Today's Analysis Observed and multi-day summations of 7 days or greater using data from the PRISM Climate Group.

The individual daily data products (Today's Analysis Observed, those labeled Last X Days Observed, and those labeled X To Date Observed.) represent a 24 hour total ending at 12UTC on the indicated date. These products are updated every hour to incorporate the most recent data. The individual hourly data products (labeled Since 12Z Observed and those labeled Last X hours) contain data for the labeled time frame. The data are on an approximate 4km x 4km grid cell scale.

NWS PRECIPITATION TOTALS MANUAL

The RFCs produce the data using a multi-sensor approach utilizing NWS 88D radar estimates of precipitation, automated and manual precipitation gauges and satellite estimates of precipitation. The 13 National Weather Service (NWS) River Forecast Centers (RFC) produce Quantitative Precipitation Estimates (QPE) for their individual RFC areas.

Nws precipitation totals