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New York Drought Information: definitions, information resources, maps, and tools
DEFINITIONS OF DROUGHT
"Drought is a condition of moisture deficit sufficient to have an adverse effect on vegetation, animals, and man over a sizeable area."
(Warwick, R.A., 1975, Drought hazard in the United States: A research assessment: Boulder, Colorado, University of Colorado, Institute of Behavioral Science, Monograph no. NSF/RA/E-75/004, 199 p.)
"A period of abnormally dry weather sufficiently prolonged for the lack of water to cause serious hydrologic imbalance in the affected area." (Huschke, R.E., ed., 1959, Glossary of meteorology: Boston, American Meteorological Society, 638 p.)
"A climatic excursion involving a shortage of precipitation sufficient to adversely affect crop production or range production." (Rosenberg, N.J., ed., 1979, Drought in the Great Plains--Research on impacts and strategies: Proceedings of the Workshop on Research in Great Plains Drought Management Strategies, University of Nebraska, Lincoln, March 26-28: Littleton, Colorado, Water Resources Publications, 225 p.)
"A period of below average water content in streams, reservoirs, ground-water aquifers, lakes and soils." (Yevjevich Vujica, Hall, W.A., and Salas, J.D, eds., 1977, Drought research needs, in Proceedings of the Conference on Drought Research Needs, December 12-15, 1977: Colorado State University, Fort Collins, Colorado, 276 p.)
Definition of a drought can be a complex issue, a collection of other definitions of drought follows. Note that particular definitions may not be appropriate for individual circumstances, and that some of the definitions may be quite location specific.
Drought: Dryness due to lack of rain... An absolute drought is a period of at least 15 consecutive days to none of which is credited 0.01 inches of rain or more. A partial drought is a period of at least 29 consecutive days, the mean daily rainfall of which does not exceed 0.01 inches. A dry spell is a period of at least 15 consecutive days to none of which is credited 0.04 inches or more... The definitions of absolute drought anf partial drought were introduced in British Rainfall, p. 21, 1887, while that of dry spell was first used in British Rainfall, p. 15, 1919 [from Meteorological Glossary, Air Ministry, 3rd ed., London, 1944, p. 68.] [from Glossary of Geology and Related Sciences, American Geological Institute, Washington, D.C., 1957, p. 89.).
DROUGHT INFORMATION RESOURCES
General Information on Droughts
Water Supply Paper 2375 - National Water Summary 1988-89--Floods and Droughts
Federal Agency Drought Information
Drought Information Centers
Hydrologic Conditions by New York State Drought Region
Hudson River Salt Front Data
New York City Reservoir Levels
New York City Delaware River Basin Storage
National Oceanic and Atmospheric Administration (NOAA) Drought Monitor
National Weather Service Northeast River Forecast Center (NERFC) Northeast Departures from Normal and Water Supply
National Weather Service Middle Atlantic River Forecast Center (MARFC) Precipitation Departures Map
National Weather Service Ohio River Forecast Center (ORFC) Ohio River Valley Drought and Precipitation Information
Below are data or web applications associated with this project.
Maximum likelihood logistic regression (MLLR) is used to estimate drought probabilities for selected Northeast rivers and streams. Winter streamflows are used to estimate the chance of hydrologic drought during summer months. This application allows the display and query of these drought streamflow probabilities for Northeastern streams.
The National Water Dashboard (NWD) is a mobile, interactive tool that provides real-time information on water levels, weather, and flood forecasts - all in one place on a computer, smartphone, or other mobile device. The NWD presents real-time stream, lake and reservoir, precipitation, and groundwater data from more than 13,500 USGS observation stations across the country.
Hydrologic Conditions Network Map displays Streamflow Monitoring Network, Groundwater Bedrock Aquifer Monitoring Wells, and Groundwater Unconsolidated Aquifer Monitoring Wells in New York State Drought Regions.
Current drought conditions in New York state.