Snow water equivalent chart Jul 31, 2025 · Utah’s Snow Survey Program Team works to provide mountain snowpack data and streamflow forecasts from across the state. It represents the depth of water that would cover the ground if the snow cover was in a liquid state (NWS, 2018). Contact your state water supply staff for assistance. This information can be a valuable tool for conservation planning, water supply management, flood control, drought and avalanche prediction, and recreation. Natural Resources Conservation Services: SNOTEL Data. Use the Snowpack Snow Water Equivalent (Snowpack SWE) The amount of water measured from melting a core of snow obtained from a location that is equal to the Snowpack Depth Snow Water Equivalent (SWE) is a common measurement used by hydrologists and water managers to gage the amount of liquid water contained within the snowpack. Jan 27, 2025 · Utah's snowpack levels are slightly lower than average as of Jan. Statewide, the snowpack is 90 percent of average for this date. S. ) Link to data: / Water Year The Snow Water Equivalent (SWE) calculator computes of the volume of liquid water contained in rain or snow pack defined by area, depth and snow type or rain. The following location-specific data provides snow water equivalent, precipitation, air temperature, and soil moisture for individual sites and basins in Utah. 3 days ago · Statistical shading percentiles are calculated from period of record (POR) data, excluding the current water year. Zip codes (where available) of observations will be included in text files after October 7, 2008. It is analogous to melting the snow and measuring the depth of the resulting pool of water. for those sites on this day. Snow Water Equivalent > End of Previous Month (SNOTEL and Snow Course) > Percentile > Stations Water Year-to-Date Precipitation > Daily > Compared to POR > Stations for those sites on this day. Maps of snow water equivalent, snow precipitation, snow melt, and other reports. For further details on the methodology and analyses of the datasets, please see Mudryk et al. The snow water equivalent percent of median (or average) peak represents the current Jul 31, 2025 · Snow and Water Interactive Map Welcome to the National Water and Climate Center's Snow and Water Interactive Map, a groundbreaking tool designed to provide farmers, researchers, policymakers, and water management professionals with up-to-the-minute snow survey data and water supply forecasting. Students discussed some of the values of collecting snow data including water management for flood prevention and irrigation. The National Operational Hydrologic Remote Sensing Center (NOHRSC) ingests daily ground-based, airborne, and satellite snow observations from all available electronic sources for the coterminous U. Calculate the equivalent water volume for snow and learn the steps to figure the snow water equivalent (SWE) manually, without a calculator. When the water equivalent of snow cannot be accurately measured by melting, weighing, or core sampling; the observer shall estimate the water equivalent to the nearest 0. The WATER YEAR-TO-DATE-PRECIPITATION represents total precipitation since October 1st, expressed in inches. Snow Water Equivalent (SWE) is the amount of water contained in snowpack. water-data. Current SWE Map Snow Water Equivalent Ranking This map compares current MBRFC Modeled SWE with the historical record of modeled SWE for each basin. The weight Provides for the Northern Hemisphere daily updates of the equivalent amount of liquid water stored in the snow pack. Use Figure 11-8, New Snowfall to Estimated Meltwater Conversion Table, only as a guide in estimating the water equivalency of newly fallen snow. 1 day ago · Statistical shading percentiles are calculated from period of record (POR) data, excluding the current water year. Explore current and historical snow, water, and climate data with customizable maps and export options provided by the USDA NWCC iMap tool. The data is available in the spatial resolution of 5 km and with the temporal extent from January 2006 to June 2024. 2 days ago · Note: these data are unofficial and provisional. Links to some additional sources of SWE and snow model information: Link to ARCGis Online app for NOHRSC SWE and SD National Snow & Ice Data Center -Info about NOHRSC Snow Model - Snow Data Assimilation System (SNODAS) NOHRSC Interactive Snow Information - Use Query [ i ] to select station to view snow model data. 30) precipitation in inches Month Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep STATE OF UTAH MONTHLY SNOW WATER EQUIVALENT SUMMARY Snow Water Equivalent (in. The user can select and compare projection statistics or year (s) by clicking titles on and off in the legend. The SWE record is produced on a daily, weekly, and monthly basis. It is more useful than snow depth for estimating the volume of meltwater flow. NWS Boulder Denver Colorado Snowpack Information About the Colorado Snow Survey NRCS's Snow Survey and Water Forecasting program monitors seasonal snowpack and annual mountain precipitation and uses the data collected to provide streamflow forecasts. Snow water equivalent is a measure of the liquid water contained in snowpack. Jul 31, 2025 · The National Water and Climate Center provides a number of predefined reports, using the online tools it administers for the Snow Survey and Water Supply Forecasting Program. Note the left side that shows the inches of water content in the basin. The snow water equivalent percent of median (or average) peak represents the current Jan 21, 2025 · EISER 123% 108% BOISE 106% BRUNEAU OWYHEE 116% 117% BIRCH - MEDICINE LODGE - BEAVER - CAMAS HENRYS FORK - TETON WILLOW LITTLE LOST BIG LOST BIG WOOD LITTLE WOOD SALMON FALLS 114% GOOSE CREEK 109% 118% BEAR SNAKE BASIN ABOVE PALISADES 93% Lower Bear 90% Upper Bear BLACKFOOT PORTNEUF RAFT 103% NORTHERN PANHANDLE REGION 101% SPOKANE 90% Kootenai Pend Oreille 106% Priest Lake Mountain Snow Water Snow Water Equivalent, often called SWE, is a measurement of how much water is in melted snow. Snow Telemetry (SNOTEL) daily and hourly data reports. SNOTEL is a n automated near real-time data collection network that provides mid- to high-elevation hydroclimatic data from mountainous regions of the western United States. We would like to show you a description here but the site won’t allow us. 21, but there is still plenty of time for that to improve, according to data provided by the National Water and Climate Center. This includes snow depth, snow water equivalent (SWE, the amount of liquid water contained in the snowpack), precipitation, temperature, soil moisture, reservoir, and streamflow data. You can view annual snow water equivalent for Utah from 1981 to the present, as well as median, maximum and minimum values, on the NRCS site. SWE measurements are useful for assessing both the potential surface runoff from snow melt and the water availability for regions in lower elevations. Point maps and interactive maps of snow water equivalent, snow depth, and snow density from the Natural Resources Conservation Service (NRCS) Snow Telemetry (SNOTEL). This is because 3 feet of fresh, dry, fluffy snow may represent only 4-5 inches of SWE, but 3 feet of compacted, wet, spring snow may contain 12 inches or more of SWE. Medians and averages are calculated for the period 1991-2020. Another assumption is that the snow metamorphosis (transformation with age) is also uniform and will yield similar water equivalents across the geographic area and various heated roofs. 1 - Sept. The National Water and Climate Center now provides similar information in an updated format, linked below by state and content. Capabilities include options to display observations or statistical metrics for specific dates and durations of interest. The snow water equivalent percent of median (or average) peak represents the current. Think of it like this: if you took a column of snow and melted it down, how much liquid water would you have? It’s measured in inches and helps us understand how much water is stored in a snowpack. In other words, it is the amount of water that will be released from the snowpack when it melts. Jul 31, 2025 · Welcome to the National Water and Climate Center's Snow and Water Interactive Map, a groundbreaking tool designed to provide farmers, researchers, policymakers, and water management professionals with up-to-the-minute snow survey data and water supply forecasting. The colored lines (2006 – 2100) are projections from 10 LOCA downscaled climate models selected for California. For example, 12 inches of very light, dry snow that’s typically found in colder, interior regions like Montana, Utah and Colorado will contain less water when melted compared to the heavy, wet, dense snow often More Detailed Interactive Map Links Interactive Snow Water Equivalent Map Snow Water Equivalent Map As an Image Colorado Statewide Graphs SNOW WATER EQUIVALENT IN STATE OF COLORADO Nov 1 Jan 1 Mar 1 May 1 Jul 1 Sep 1 0 5 10 15 20 25 Median Peak SWE Max Median (POR) Median ('91-'20) Min Stats. Jul 31, 2025 · The National Water and Climate Center SNOTEL Update Report is an analysis utility that produces reports with daily Snow Telemetry (SNOTEL) snow water equivalent (SWE) and precipitation values for 24 different geographic areas. This data, updated weekly, shows the snow water equivalent (SWE) across the Northern Hemisphere, courtesy of the Canadian Cryospheric Information Network (CCIN). The National Water and Climate Center provides reports, graphs, and interactive maps based on data from SNOwpack TELemetry Network (SNOTEL) stations. A 50 percent ranking indicates current SWE is in the middle of our historical record. (2015) 1 Jan 18, 2025 · This snow to water calculator will help you figure out how much water an amount of snow will turn into if the snow melts. Maps are posted weekly from mid-December through March or early April. Because one inch of precipitation can produce between two inches of sleet to 50 or more inches of snow, depending on how cold the air is, SWE is a more reliable way to measure water supplies. Feb 21, 2025 · This chart uses SNOTEL data to determine the Snow Water Equivalent in the area of the Colorado River Basin where Denver Water collects its water. You can request reports in seven different display formats, allowing comparisons of the daily data against either the daily 30-Year Median or Average, the current or We would like to show you a description here but the site won’t allow us. The snow water equivalent percent of median (or average) peak represents the current snow water equivalent at selected SNOTEL sites in or near the basin compared to the median (or average) of the maximum seasonal values observed each water year for those sites. Station Snowfall Reports Station Snow Water Equivalent Reports Station Snowdepth Reports Interpolated Snowfall Products Notes This chart shows monthly averages of projected Snow Water Equivalent values for the selected area on map under the RCP 4. These forecasts help water managers make informed management decisions and curtail water supply issues before they occur. Jul 31, 2025 · The Basin Filled GIS Maps are being retired and will no longer be updated or available. Open Chart Charts show projected data for the remainder of the water year, for a range of possible outcomes based either on the 10th, 30th, 50th, 70th, and 90th historic percentiles or based on accumulation from historic years. Snow Water Equivalent and Depth Information Weather. Snow-water content – also referred to as snow water equivalent – is the amount of water contained in snowpack. Link to NCEI Snow Climatology The SNOW WATER EQUIVALENT represents the depth of water in the snowpack, if the snowpack were melted, expressed in inches. The snow water equivalent percent of median (or average) represents the current snow water equivalent found at selected SNOTEL sites in or near the basin compared to the median (or average) value for those sites on this day. gov > Middle Atlantic RFC > Snow Water Equivalent and Depth Information ModelSWESnow Water Equivalent This graphic shows the snow water equivalent (SWE) used within the Community Hydrologic Prediction System (CHPS) model, broken down by river subbasins. ) Link to data: / Water Year They also learned how to dig snow pits, measure the depth of the snow, take snow samples and use all of this information to solve equations to determine the Snow Water Equivalent, or water content, of the snowpack. It is traditionally measured by weighing the mass of a core of snow — from snow surface to soil — collected by an observer (snow gauger) in the field. Precip: Water year (Oct. Percentile categories range from: minimum to 10th percentile , 10th - 30th , 30th - 70th , 70th - 90th , and 90th - maximum. com Upper Colorado Snowpack Database Jul 31, 2025 · The Interactive Map Conditions interface allows users to display current and historical snow water equivalent, snow depth, precipitation, reservoir storage, and streamflow data collected by the Natural Resources Conservation Service and other monitoring agencies. An area ranked as 'Less than 10 percent' is at the lower end of the record and one ranked near 100 percent is at the higher end. Jan 6, 2025 · Snow Water Equivalent (SWE) is a common snowpack measurement. 1 day ago · SWE: Represents the snow water equivalent found at selected SNOTEL sites in inches. Month Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep STATE OF OREGON MONTHLY SNOW WATER EQUIVALENT SUMMARY Snow Water Equivalent (in. The SNOW WATER EQUIVALENT represents the depth of water in the snowpack, if the snowpack were melted, expressed in inches. The data record is produced using a combination of passive microwave radiometer and ground-based weather station data. The snow water equivalent describes the amount of liquid water in the snow pack that would be formed if the snow pack was completely melted. com Upper Colorado Snowpack Database The NOHRSC measures snow water equivalent and soil moisture using gamma radiation remote sensing. Western Snow Conference: Forum for individuals and organizations to share information on snow and runoff and to advance snow and hydrologic sciences. 01 inch. Snow scientist’s use snow water equivalent rather than snow depth to predict water supply because the snowpack’s water content can vary drastically depending on the local climate. It is the amount of water contained within the snowpack. Jun 25, 2025 · Generate graphs that show cumulative snow water equivalent in river basins in western states of Alaska, Arizona, California, Colorado, Idaho, Montana, New Mexico A conversion chart that converts snowfall depths and amounts to the water equivalent Experts track snowpack using snow water equivalent (SWE), which estimates the amount of water that would cover the ground if the snow cover was in a liquid state. This unique observing system includes two low-flying aircraft to conduct surveys in 31 states, including Alaska, as well as in 8 Canadian provinces. Dec 18, 2024 · What is snow water equivalent (SWE)? SWE is the amount of water contained in snow. You should measure the snow on your roof, if possible, because of the great variations in snow depth that may occur over even a small geographic area. Mar 28, 2025 · The snow water equivalent measures the amount of water contained in the snowpack and is a key component of DWR’s water supply forecast. The visualization shows the current level of snowpack compared with the range of historical values for snow water content as a function of the day of the year. 5 scenario. Technical notes Datasets of monthly snow cover fraction (SCF), monthly snow water equivalent (SWE), and annual maximum snow water equivalent (SWEmax) over Canada are constructed using a multi-dataset approach for the time period, 1981-2016. bvptgig nwek omj eoftgf ezksi mtggqi yhhf juhu ruxem oyfz icthlr vmkj sgolvv qgneoi gdiq