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  • May brought a cool end to a warm spring

    Jun 2, 2021 8:15 am

    May temperatures varied substantially across Illinois, with an average temperature 2.5 degrees below the 30-year normal, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey.

  • Scientists study regional benefits of limiting climate warming

    May 24, 2021 12:00 pm

    Limiting the global average temperature to 1.5 degrees C (2.7 degrees F) above pre-industrial conditions compared with 2 degrees C (3.6 degrees F), as predicted for the future, will avoid more intense and more frequent heavy precipitation and extreme heat waves, according to a recent study at the Illinois State Water Survey (ISWS) that explored global warming’s effects on specific U.S. regions.

  • Rock Island county map of structure-based flood risk assessment

    FEMA honors Water Survey and Illinois Department of Natural Resources

    May 18, 2021 3:00 pm

    The Illinois State Water Survey and the Office of Water Resources in the Illinois Department of Natural Resources took first place in FEMA’s 2021 National Cooperating Technical Partner Recognition Award for their statewide efforts to assess flood risk at the individual property level. 

  • Soil temperatures cooler in May but are rising

    May 18, 2021 10:30 am

    Cooler weather led to a decline in soil temperatures in the first half of May, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) program manager at the Illinois State Water Survey.

  • April brought a mix of winter, spring, and summer weather

    May 3, 2021 12:45 pm

    Illinois temperatures varied considerably in April from way above to significantly below normal, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey.

  • Corn stalks in summer

    Climatologist: Vegetation plays a role in developing flash droughts

    Apr 22, 2021 1:30 pm

    Farmland vegetation and grasses can affect both the frequency and extent of flash droughts, say scientists at the Illinois State Water Survey (ISWS), who hope to better understand the phenomenon and improve early warnings.

  • PRI experts help assess climate change impact on Illinois

    Apr 21, 2021 2:15 pm

    Illinois is undergoing a rapid change in weather patterns that has started to transform the state, according to a new scientific assessment by The Nature Conservancy in Illinois. Scientific experts from across PRI contributed to the report, including Illinois State Climatologist Trent Ford; Water Survey scientists Daniel Abram, Walt Kelly, Momcilo Markus, Sally McConkey, and Ashish Sharma; and Natural History Survey scientists Sergiusz Czesny, Jim Ellis, Chris Stone, and John Taft.

    Read more about the report and its findings from the Nature Conservancy.

  • Near-surface soil temperatures and moisture levels are declining in mid-April

    Apr 16, 2021 11:30 am

    Colder weather in the second week of April has caused soil temperatures to decline in Illinois.

  • watershed management areas map

    Water Survey helps Cook County manage stormwater

    Apr 5, 2021 11:00 am

    Experts from the Illinois State Water Survey support the Metropolitan Water Reclamation District of Greater Chicago in making informed watershed management decisions for a vast service area that includes 128 suburban communities in Cook County. 

  • Mild March was quite a contrast to February

    Apr 2, 2021 8:30 am

    The preliminary statewide average March temperature was 45.9 degrees, 4.5 degrees above the 1991–2020 average and the 13th warmest on record going back to 1895. Preliminary statewide average total March precipitation was 4.10 inches, 1.16 inches above the 1991–2020 average and the 30th wettest on record going back to 1895.  

  • map of Illinois flood insurance rate map status by county

    FEMA recognizes Water Survey's significant contributions as a Cooperating Technical Partner

    Mar 15, 2021 8:30 am

    The Federal Emergency Management Agency recently praised the Water Survey’s accomplishments as a Cooperating Technical Partner, including improving the flood mapping process in Illinois and developing accurate, easily accessible flood data for every county in Illinois. 

  • Water Survey to analyze flood risks in Boone and Winnebago counties

    Mar 11, 2021 3:45 pm

    Illinois State Water Survey (ISWS) hydrologic and hydraulic modeling in Boone and Winnebago Counties, Illinois is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning.

  • Warmer soils this winter in Illinois could indicate healthy insect populations for spring

    Mar 5, 2021 9:00 am

    Despite the cold weather this February, winter soil temperatures averaged 1 to 2 degrees higher than the long-term averages in Illinois, indicating a greater chance of insects surviving the winter.

  • winter scene in the woods

    A wild February ended an otherwise mild winter

    Mar 2, 2021 8:00 am

    The cold season came with a vengeance in February, bringing bitter cold and snow across the state. The preliminary statewide average February temperature was 20.0 degrees, 11.1 degrees below the 1991–2020 average.

  • brown marmorated stinkbug

    Improved pest degree day calculators are available for the 2021 growing season

    Feb 4, 2021 10:45 am

    Two updated pest degree day calculators from the Prairie Research Institute (PRI) are now available for commodity and specialty crop growers in Illinois, featuring seven-day weather forecasts, graphs, and insect emergence maps to track accumulated degree days and light for the most notorious pests.

  • snow-covered trees hanging over a path

    A mostly mild January ends with winter storms in Illinois

    Feb 2, 2021 9:45 am

    January was quite a bit warmer and slightly wetter than average across the state, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey.

  • Lead sampling kit

    Testing for lead in private wells

    Jan 27, 2021 12:00 pm

    To prevent public health crises that result from widespread lead contamination in drinking water, community water supplies are required to closely monitor their drinking water quality. 

  • ISWS watershed science team tackles new projects

    Jan 19, 2021 10:15 am

    Ongoing projects in watershed science continue to contribute to long-term databases, while new projects tackle some of today’s tough challenges.

  • frost on evergreen branch

    December brought warm and dry weather to end 2020

    Jan 4, 2021 10:45 am

  • Water Survey to analyze flood risks in Massac County, Illinois

    Dec 23, 2020 1:15 pm

    The Illinois State Water Survey (ISWS) announced today that new hydrologic and hydraulic modeling in Massac County, Illinois is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning.

  • map of Illinois average temperature for November 2020

    November brings a warm end to fall

    Dec 2, 2020 9:30 am

    According to Illinois State Climatologist Trent Ford, November was much warmer and slightly drier than average across Illinois. The preliminary statewide average November temperature was 46.6 degrees, 4.1 degrees above the 30-year normal and tied for the ninth warmest on record. Preliminary statewide average total precipitation for November was 2.94 inches, 0.53 inches less than the 30-year normal, and the 70th driest on record.

  • corn being harvested

    Soils remain warm in mid-November

    Nov 17, 2020 9:15 am

    November soil temperatures in Illinois are warmer than normal, with the average temperature at 4 inches under bare soil reaching 48 degrees on Nov. 15, 7 degrees warmer than the long-term average. 

  • PRI scientists bring expertise to study of critical interfaces

    Nov 16, 2020 8:30 am

    PRI scientists from the Illinois State Water Survey and Illinois State Geological Survey are part of a collaborative project to study “critical interfaces” in the environment.

  • Cool fall temperatures continued in October

    Nov 3, 2020 1:00 pm

    October was much cooler than average across Illinois, 2.6 degrees below the 30-year normal for the month, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey. The preliminary statewide average October temperature was 51.8 degrees.

  • orange irrigation pipe

    Reporting program collects data on water use in Illinois

    Nov 2, 2020 9:00 am

    Scientists investigating present and future water resources in Illinois find a wealth of data through the Illinois Water Inventory Program (IWIP), which collects data from users of high-capacity intakes and wells in Illinois.

  • Soils are drying out across Illinois in October

    Oct 16, 2020 1:45 pm

    Rainfall was lower than average throughout the state in the first half of October. According to the Midwestern Regional Climate Center, Illinois received 1.36 inches from Oct. 1 to 15, 1.08 inches below normal. Combined with a dry September for southern and parts of central Illinois, these conditions have caused soil moisture levels to fall to near the wilting points for most of the state.

  • Leaves turning colors

    September weather was slightly cooler and wetter than average in Illinois

    Oct 2, 2020 8:45 am

    The preliminary statewide average September temperature was 65.4 degrees, 0.8 degrees below the 30-year normal, and tied for the 45th coolest on record. Preliminary statewide average total precipitation for August was 3.39 inches, 0.16 inches more than the 30-year normal, and the 58th wettest on record.

  • physical model in which vertical rods extend from a map to show groundwater level changes in the Joliet, Illinois, area

    ISWS innovates in analysis and visualization of groundwater data

    Sep 18, 2020 10:15 am

    Water Survey staff have developed innovative ways to analyze and visualize groundwater data, from painstakingly soldered flow models using electricity, to digital flow models like the widely used Prickett-Lonnquist Aquifer Simulation Model (PLASM), to more recent interactive maps and a new approach to developing potentiometric surfaces using MODFLOW.

  • Soybeans ready for harvest

    Illinois has cooler, wetter soils in mid-September

    Sep 17, 2020 8:00 am

    Soil temperatures have cooled the first half of September. Wetter weather the past two weeks has led to increases in soil moisture for northern and central Illinois. 

  • View of New York City from the East River.

    NOAA draws on ISWS expertise for climate model update

    Sep 11, 2020 8:00 am

    The National Oceanic and Atmospheric Administration (NOAA) is tapping the expertise of the Illinois State Water Survey (ISWS) to finish a multi-year collaboration updating climate model projections for its Atlas 14, which serves as the benchmark for precipitation frequency values across the United States.

  • Corn field and blue sky

    Growing degree day calculator provides site-specific weather data

    Sep 2, 2020 9:00 am

    The Illinois State Water Survey (ISWS) growing degree day (GDD) calculator is updated daily through local weather stations for users to calculate projections on crop development and maturity specifically for their location.

  • clouds with pink lining

    State Climatologist: Varied temperatures and rainfall and a derecho make for a wild August

    Sep 2, 2020 9:00 am

    August was slightly cooler and much drier than average across Illinois. The preliminary statewide average August temperature was 72.7 degrees, 0.9 degrees below the 30-year normal and the 45th coolest on record. Preliminary statewide average total precipitation for August was 2.01 inches, 1.58 inches below than the 30-year normal and the 15th driest on record.

  • brown grass on lawn

    Illinois team contributes to vital weekly drought assessment

    Aug 28, 2020 12:00 pm

    Determing which areas of the U.S. and of Illinois are experiencing drought is a critical function of the U.S. Drought Monitor. A team of Illinois scientists led by Illinois State Climatologist Trent Ford provides input on the state drought determination every week. 

     

     

  • A grass field at dawn

    Soil temperatures are near normal in mid-August

    Aug 18, 2020 9:15 am

    Soil temperatures have returned to near normal after a cool start in August, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) program manager at the Illinois State Water Survey.

  • Warmer fall temperatures don’t eliminate risk of early fall freeze

    Aug 10, 2020 1:30 pm

    Temperatures in September and October have risen for decades in the Midwest; however, early fall freeze events have occurred despite the increasing temperatures.

  • State Climatologist: An active July continues a warm summer

    Aug 3, 2020 1:45 pm

    July was warmer and wetter than average across Illinois, continuing a warmer than average summer season. The preliminary statewide average July temperature was 77.2 degrees, 1.8 degrees above the 30-year normal. Preliminary statewide average total precipitation for July was 5.79 inches, 1.71 inches wetter than normal.

  • corn fields

    Corn fields add to muggy, humid Midwestern temps

    Jul 21, 2020 9:15 am

    It’s not just the heat; it’s the humidity and “corn sweat” making muggy Midwestern summers feel even hotter.

  • Corn growing in the field

    Soils are warmer than normal for Illinois in mid-July

    Jul 20, 2020 1:30 pm

    Warmer weather in early July has led to higher than normal soil temperatures in Illinois, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) program manager at the Illinois State Water Survey.

  • Study shows future climate changes in wind patterns vary by U.S. region and season

    Jul 15, 2020 10:00 am

    The Midwest is a particularly promising region for future wind energy development out to 2100 when accounting for climate change, according to a new study at the University of Illinois.

  • the water testing laboratory at the Water Survey

    ISWS analysis can provide answers to water questions

    Jul 14, 2020 12:00 pm

    When Illinoisans have questions about their home water supply, the Water Survey’s Public Service Lab can provide answers. The Water Survey’s chemists customize each water analysis depending on where the water came from, how it will be used, and the symptoms of the problem. 

  • Water Survey to analyze flood risks in Macoupin County, Illinois

    Jul 10, 2020 1:15 pm

    Illinois State Water Survey (ISWS) hydrologic and hydraulic modeling in Macoupin County, Illinois, is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning.

  • Reflection of Building on Body of Water at Daytime

    The impact of Bulletin 75

    Jul 8, 2020 11:00 am

    As Illinois experiences a third consecutive year of record-breaking rainfall stretching from Chicago to Cairo, researchers at the Illinois State Water Survey (ISWS) have updated the publication that provides Illinois’ standards for expected extreme storms, known as Bulletin 75.

  • June was mostly warm and dry across the state.

    Summer started mostly warm and dry in Illinois

    Jul 2, 2020 1:30 pm

    The preliminary statewide average June temperature was 73.7 degrees, 1.8 degrees above the 30-year normal, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey. The preliminary statewide average total June precipitation was 3.70 inches, 0.51 inches below the 30-year normal.

  • ISTC and ISWS Director Kevin OBrien with University of Illinois System President Timothy Killeen at City, Water, Light, and Power in Springfield, Illinois.

    Carbon capture collaborations lead clean energy drive

    Jun 30, 2020 8:00 am

    The Prairie Research Institute — is leading a drive to implement CO2 removal strategies, an essential step to a clean-energy future. 

  • Google Earth image of the shooting range showing the actual flood extent.

    Case study on flooding highlights usefulness of topographical tool

    Jun 18, 2020 10:45 am

    After a downpour in early June, Illinois State Water Survey (ISWS) hydrographer Ryan Meekma compared images from the Topographic Wetness Index (TWI), which outlines low-lying areas in Illinois that could flood, with actual flooding at a gun range in Champaign, Illinois, to study the tool’s effectiveness.

  • A lack of rain prompts drier soils across Illinois in mid-June

    Jun 17, 2020 8:00 am

    Drier weather has led to declining soil moisture across Illinois, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) program manager at the Illinois State Water Survey.

  • May was cool and wet in Illinois

    Cool, wet May ends wet spring

    Jun 2, 2020 9:00 am

    May was much colder and moderately wetter than average across Illinois, bringing an end to a wet climatological spring season. The preliminary statewide average May temperature was 60.5 degrees, 2.2 degrees below the 30-year normal and the 39th coldest on record. Preliminary statewide average total precipitation for May was 5.41 inches, 0.81 inches wetter than the 30-year normal and the 25th wettest on record.

  • Soil moisture levels rose in mid-May

    Soils are wetter in Illinois from mid-May showers

    May 19, 2020 2:30 pm

    Recent rains have caused soil moisture levels to rise in most of Illinois, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) program manager at the Illinois State Water Survey.

  • Illinois mp of water supply planning regions.

    Water Supply Planning team helps Illinois meet water needs

    May 11, 2020 9:45 am

    Due to projected growth of the population and economy, Illinois could require 20 to 50 percent more water in coming decades. Ensuring adequate and reliable supplies of clean water for all requires us to think ahead. We need to know how much water will be available, how much water we will need, what the options are for providing additional supplies, reducing demand, and what the impacts and costs will be.

    Since 2006 the Illinois Department of Natural Resources has tasked the Water Survey with leading regional water supply planning activities for 11 Illinois regions. Learn more about the team that carries out this important activity.

  • New hydrologic and hydraulic modeling in McHenry County, Illinois is underway.

    Water Survey to analyze flood risks in McHenry County, Illinois

    May 4, 2020 3:30 pm

    The Illinois State Water Survey (ISWS) announced today that new hydrologic and hydraulic modeling in McHenry County, Illinois is underway as part of a study to help local communities identify areas of high flood risk for flood mitigation planning.