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Northeast River Forecast Center

Local forecast
by "City, ST"


Northeast River Forecast Center
Departures from Normal, Water Supply and Water Resources

Daily Information

24-Hour Precipitation Totals for the Northeast (Ending 12Z)
N.Y. State Daily Snow Observations
Precipitation Analysis Page
Short-term Precipitation (Fire Weather) Graphics
Daily Water Conditions from the USGS
US Rain/Dry Days from the USGS


Precipitation and Departure from Normal Graphics






Note to users: Most of the NERFC precipitation total and departure products are updated daily. These products were updated only once a week prior to January 5, 2011. The graphics for monthly data and the accompanying text product are created in the late afternoon on the second of each month for the previous month.

An error was found with the departures from normal for Chemung County New York prior to December 29, 2010. Products created after that date will have the correct values.

Data Description: The precipitation totals used in these graphics and the accompanying text products are from the 6-hourly County Mean Areal Precipitation (MAP) calculated for use in the Northeast River Forecast Center's Community Hydrologic Prediction System (CHPS.)

Precipitation totals are calculated for the most recently completed Hydrologic Day. For example, the products generated on October 24, 2011 will include data through 12Z on October 24, 2011. The monthly totals and departures are calculated from the first day of the month at 12Z through 12Z on the first day of the next month.

The "normal" precipitation is derived from PRISM climate data, created at Oregon State University. The 30 year PRISM normal from 1971-2000 is used for these graphics and the accompanying text products. For more information about PRISM go to http://www.prism.oregonstate.edu/

Acknowledgment: The Precipitation Totals and Normals for the counties of Broome, Chemung, Chenango, Cortland, Delaware, Otsego, Steuben, Sullivan and Tioga in New York State are provided by the Middle Atlantic River Forecast Center.

Text Version
The data provided in these graphics is also available as text. The information for Month to Date, 30 Day, 60 Day, 90 Day, 180 Day, Year to Date, 365 Day, and Water Year to Date are available in the Precipitation and Departure from Normal Table. The information for monthly totals and departures from normal are available below.



County Percent of Normal Precipitation Barcharts



These graphics show County averaged percent of normal precipitation. The time periods calculated include: Month to Date(MTD), 30 Day, 60 Day, 90 Day, 180 Day, Year to Date(YTD), 365 Day, and Water Year (WYR) to Date.

The X-axis is the time period in days. The Y-axis is the Percent of Normal. The percent of normal for each time period is displayed as a red bargraph above the corresponding time period. Two numbers are also presented for each period. The top number is the county averaged rainfall. The bottom number is the "normal" precipitation derived from PRISM climate data.

A dotted blue is plotted at 100% of normal precipitation. Bargraphs below the 100% line indicate a period where precipitation was below normal. Bargraphs above the 100% line indicate a period where precipitation was above normal.

Acknowledgment: The graphics for the counties of Broome, Chemung, Chenango, Cortland, Delaware, Otsego, Steuben, Sullivan and Tioga in New York State are provided by the Middle Atlantic River Forecast Center.


Monthly County Precipitation and Departure from Normal Tables

June 2014 County Precipitation and Departure from Normal
May 2014 County Precipitation and Departure from Normal
April 2014 County Precipitation and Departure from Normal
March 2014 County Precipitation and Departure from Normal
February 2014 County Precipitation and Departure from Normal
January 2014 County Precipitation and Departure from Normal
December 2013 County Precipitation and Departure from Normal
November 2013 County Precipitation and Departure from Normal
October 2013 County Precipitation and Departure from Normal
September 2013 County Precipitation and Departure from Normal
August 2013 County Precipitation and Departure from Normal
July 2013 County Precipitation and Departure from Normal


Water Use Restrictions

Water Use Restrictions from the Massachusetts DEP.
Water Use Restrictions from the Rhode Island Water Resources Board.


 


Main Link Categories:
Current and Forecast River Conditions Maps, River Forecasts & Information, River Observations, Flash Flood Guidance, Flood Outlook Potential Graphic, Flood Statements, Hydrometeorology, Snow and River Ice, AHPS

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National Weather Service
Northeast River Forecast Center
445 Myles Standish Blvd.
Taunton, MA 02780
Page Author: Northeast River Forecast Center
Page last modified: July 02, 2014
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