Data Source: USGS Water Data for the Nation

Comments: Marker color indicates the current streamflow condition. Categories are based on the percentile of existing streamflow record on this day-of-the-year. A streamgage is not ranked when there is less than 10 years of record or a current streamflow measurement is unavailable. Flood stages are maintained by the National Weather Service (NWS) and are not established for all USGS streamgages.

Data Source: USGS Water Data for the Nation

Comments: Markers are labeled with the most recently measured real-time streamflow value, in cubic feet per second.

Data Source: USGS Water Data for the Nation

Comments: Rate of change is computed by subtracting the two most recent measurements divided by the elapsed time and converting to feet per hour. Data at most stations are collected at 15 minute intervals.

Data Source: USGS Water Data for the Nation

Comments: The National Weather Service (NWS) uses selected USGS stream stations for river forecasts. These stations have a flood stage assigned by the NWS. NWS river forecasts can be accessed here.

Data Source: USGS Water Data for the Nation

Data Source: USGS Water Data for the Nation

Comments: Marker color is based on the most recent rainfall rate observed at the station.

Data Source: USGS Water Data for the Nation

Comments: Snow water equivalent (SWE) measures the amount of water contained in snowpack. It can be considered as the depth of water that would theoretically result if the entire snowpack instantaneously melts. SWE depends on both snow depth and density.

Data Source: USDA Natural Resources Conservation Service (NRCS)

Comments: The median of all snow water equivalent values for this day-of-year. Presented value is the official NRCS 30-year Median updated every 10 years.

Data Source: USDA Natural Resources Conservation Service (NRCS)

Comments: The observed snow water equivalent divided by the median of all snow water equivalent values for this day-of-year, expressed as a percent. The "No value" symbol is shown when the median is zero.

Data Source: USDA Natural Resources Conservation Service (NRCS)

Comments: The observed snow water equivalent divided by the official NRCS 30-year median for April 1st, expressed as a percent. April 1st is frequently used as the snow water equivalent benchmark for allocation decisions and water forecasting. The "No value" symbol is shown when the median for April 1st is zero.

Data Source: USDA Natural Resources Conservation Service (NRCS)

Data Source: USDA Natural Resources Conservation Service (NRCS)

Comments: A watch indicates that conditions are favorable for the particular weather event in and near the Watch area and may pose a risk to life and property. A warning or advisory indicates that a particular weather event is imminent or occurring. An advisory is issued if the weather event will lead to nuisance conditions, while a warning is issued for significant weather events which will pose a risk to life and property. More information.

Data Source: National Weather Service (NWS)

Comments: Weather radar measures base reflectivity (dBZ) and does not directly measure actual precipitation. Precipitation rates stated above are provided as rough estimates only.

Data Source: Iowa Environmental Mesonet (IEM)

Comments: Values represent estimated accumulated precipitation over the specified time interval.

Data Source: Iowa Environmental Mesonet (IEM)

Comments: Values represent estimated accumulated precipitation over the specified time interval.

Data Source: Iowa Environmental Mesonet (IEM)

Comments: Values are Quantitative Precipitation Forecasts (QPFs) defined as the amount of liquid precipitation expected to fall in a defined period of time. QPFs are estimated as areal averages on a 20- by 20-kilometer grid.

Data Source: National Weather Service (NWS)

Comments: Daily ground-based, airborne, and satellite snow observations, along with modeled snowpack estimates, are used to generate the daily NOAA National Snow Analyses (NSA) depicted in this map layer. More information.

Data Source: National Weather Service - National Operational Hydrologic Remote Sensing Center (NOHRSC)

Comments: Daily ground-based, airborne, and satellite snow observations, along with modeled snowpack estimates, are used to generate the daily NOAA National Snow Analyses (NSA) depicted in this map layer. More information.

Data Source: National Weather Service - National Operational Hydrologic Remote Sensing Center (NOHRSC)

Comments: A global composite of visible-spectrum imagery from multiple satellites that is updated each hour. The visible spectrum (0.4 to 1.1µm) depicts high reflectance objects (such as clouds and snow) as white, while low reflectance objects (such as the earth's surface) is dark grey or black. Only available during daylight times.

Data Source: University of Wisconsin-Madison RealEarth™

Comments: A global composite of infrared imagery from multiple satellites that is updated each hour. The infrared spectrum (10 to 12µm) depicts heat energy, where colder objects (such as higher cloud tops) are white and warmer objects (such as lower cloud layers) are shades of gray or black.

Data Source: University of Wisconsin-Madison RealEarth™

Comments: A global composite of infrared (10 to 12µm) imagery from multiple satellites that is updated each hour. The imagery is color enhanced to increase the contrast of colder (higher altitude) features.

Data Source: University of Wisconsin-Madison RealEarth™

Comments: A global composite of water vapor (6.7µm) imagery from multiple satellites that is updated each hour. Typically, white indicates a moist layer or clouds in the upper troposphere, while shades of gray or black indicate the Earth or a dry layer in the middle troposphere.

Data Source: University of Wisconsin-Madison RealEarth™

Comments: A global composite of water vapor (6.7µm) imagery from multiple satellites that is updated each hour. The imagery is color enhanced to increase feature contrast.

Data Source: University of Wisconsin-Madison RealEarth™

Comments: Reported conditions are updated weekly and are based on a composite index that includes many indicators. The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, and the National Oceanic and Atmospheric Administration. Map courtesy of NDMC-UNL. More information.

Data Source: U.S. Drought Monitor

Comments: Depicts the National Hydrography Dataset (NHD) that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs) and paths through which water flows (canals, ditches, streams, and rivers).

Data Source: USGS Texas Water Science Center

Comments: Watershed boundaries are determined by hydrologic units. Zooming the map out shows more generalized (regional) watersheds while zooming the map in shows more detailed (local) watersheds.

Data Source: USGS National Water Information System: Mapper

Comments: This base map includes administrative boundaries, cities, water features, physiographic features, parks, landmarks, highways, roads, railways, and airports.

Data Source: ESRI ArcGIS Online

Comments: This base map provides 0.3-meter-resolution satellite and aerial imagery in the continental United States.

Data Source: ESRI ArcGIS Online

Comments: This base map is an open-srouce product built by a community of mappers that contribute and maintain data about roads, trails, cafes, railway stations, and much more all over the world.

Data Source: OpenStreetMap

Comments: This base map includes hill shading, borders, and places.

Data Source: ESRI ArcGIS Online

Comments: This base map provides a light, neutral background with minimal colors, labels, and features to give primary focus to the data layer content.

Data Source: Carto

Comments: This base map provides a dark, neutral background with minimal colors, labels, and features to give primary focus to the data layer content.

Data Source: Carto