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Water Survey

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  • frost on evergreen branch

    December brought warm and dry weather to end 2020

    Jan 4, 2021 10:45 am

  • December average temperature in top three for Illinois

    Jan 3, 2024 9:30 am

    Preliminary reports showed that December 2023 was the third warmest December on record, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey.

  • December 2021 was exceptionally warm

    Jan 5, 2022 8:45 am

    Provisional data show December was among the top 5 warmest on record in Illinois, with no snow on Christmas.

  • December 2010 in Illinois–Cold and Snowy

    Jan 3, 2011 12:30 am

    The statewide average temperature for December was 24.0 degrees, which is 5.8 degrees below normal. This ranks as the 12th coldest December on record, according to State Climatologist Jim Angel of the Illinois State Water Survey (http://www.isws.illinois.edu).

  • Complex Hydraulic Flow Patterns of Cache River

    Data from the sky inform flood planning

    Jun 21, 2022 8:00 am

    CHAMP is at the helm of one of the largest 2D models in Illinois, spanning five southern Illinois counties – Johnson, Pope, Massac, Pulaski, and Alexander. The extremely flat topography of this region, known as the Cache River Valley, follows the Cache River system and the historic path of the Ohio River that’s been heavily manipulated by humans over time.

  • Jo Daviess County alfalfa crop pattern in 2012

    Database reveals locations of sinkholes, crevices, and mines in Jo Daviess County

    May 18, 2023 8:45 am

    A new database compiling information from a decade of Prairie Research Institute (PRI) studies on the unique geology and hydrology of Jo Daviess County is designed to help residents and officials understand the karst features of the land where they live and to better protect their water supply from surface contamination.

  • Cultivating Innovation: The Intersection of Geography, Climate, and Agricultural Research in Illinois

    Jan 31, 2024 8:45 am

    Since its inception in 2008, the Prairie Research Institute has conducted long-term monitoring of Illinois’ water, soil, and climate. These data, including growing and pest degree days, soil temperature and moisture, water table levels, and in-stream sediment, are used every day by thousands of Illinoisans and by the state’s agriculture, renewable energy, and construction industries.

  • 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.

  • Cool, Wet Weather Slows Northern and Central Illinois Planting

    May 3, 2007 8:15 pm

    "Combined with cooler temperatures, wet April conditions led to widespread corn planting delays in the northern two-thirds of the state, where precipitation averaged 4.05 inches (0.46 inches above normal) and up to 5–7 inches at some locations. April temperatures averaged 49.5°F statewide (2.7°F below normal), and statewide precipitation was 3.75 inches (just 0.05 inches below normal), based on preliminary data. Southern Illinois was drier, averaging 3.38 inches (0.74 inches below normal), and planting there is further along," says State Climatologist Jim Angel of the Illinois State Water Survey (http://www.sws.uiuc.edu), a division of the Illinois Department of Natural Resources.

  • Cool, Wet Summer in Illinois

    Sep 2, 2009 11:00 am

    Based on preliminary data for Illinois, this was the 11th coolest and 8th wettest summer since statewide records began in 1895. The average temperature for June–August was 71.4 degrees, 2.4 degrees below normal. The total precipitation for June–August was 15.2 inches, 3.6 inches above normal, according to State Climatologist Jim Angel of 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.

  • 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.

  • Cooler, Wetter Soils in Mid-May

    May 16, 2016 7:00 pm

    Soils were wetter and cooler than average over most of Illinois in mid-May, according to Jennie Atkins, Water and Atmospheric Resources Monitoring (WARM) Program manager at the Illinois State Water Survey, Prairie Research Institute, University of Illinois.

  • Cooler than Normal July Prevails

    Aug 3, 2007 7:45 pm

    "Statewide July temperatures averaged 73.5°F, 2.3°F below normal, and the 20th coolest July since 1895. While we had some hot days, Illinois generally managed to avoid the heat wave experienced out West during July," says State Climatologist Jim Angel of the Illinois State Water Survey (http://www.sws.uiuc.edu), a division of the Illinois Department of Natural Resources.

  • Cooler soil temperatures in mid-April

    Apr 18, 2018 8:45 am

  • Cool, Dry November Finishes with First Major Snow of the Season

    Dec 3, 2008 8:15 pm

    November in Illinois was both cooler and drier than normal. However, a low-pressure system at the end of the month brought the first significant snowfall of the season across northern and central Illinois, according to State Climatologist Jim Angel of the Illinois State Water Survey (http://www.isws.illinois.edu).

  • Cool, Dry August for Illinois

    Sep 3, 2008 12:30 am

    August statewide precipitation was below normal, ending an eight-month streak of above-normal precipitation in Illinois that began in December 2007, according to State Climatologist Jim Angel of the Illinois State Water Survey (http://www.sws.uiuc.edu).

  • well water

    Coming soon: new hotline, website, and maps on private wells

    Nov 27, 2023 11:15 am

    A new hotline, website, and other resources will soon be available through the Illinois State Water Survey (ISWS) for private well and septic system owners and the water professionals that serve them. 

  • Cold, Snowy March for Illinois

    Apr 2, 2015 3:00 pm

    The statewide average temperature for March was 38.2 degrees, 3.1 degrees below average, according to Illinois State Climatologist Jim Angel, Illinois State Water Survey, University of Illinois.

  • light frost on fall leaves

    Cold November brings an end to meteorological autumn

    Dec 2, 2019 3:45 pm

    November temperatures were well below the long-term average across the state, breaking hundreds of local daily records. The preliminary statewide November average temperature was 35.6 degrees, about 7 degrees below our 30-year normal and tied for the ninth coldest on record.

  • Cold January for Illinois

    Feb 3, 2014 4:15 pm

    January 2014 was the eighth coldest January on record for Illinois. The statewide average temperature was 18.2 degrees, 8.1 degrees below the 1981-2010 average of 26.3 degrees, according to Illinois State Climatologist Jim Angel at the Illinois State Water Survey, University of Illinois.

  • Cold February Wraps Up Cold Winter

    Mar 3, 2010 1:45 am

    Based on preliminary data in Illinois, the statewide average temperature for February was 25.1 degrees, 5.1 degrees below normal. Snowfall for February was above normal. Amounts ranged from 6 inches in southern Illinois to over 18 inches in the Quad Cities and Chicago areas, according to State Climatologist Jim Angel of the Illinois State Water Survey 

  • Coldest July on Record for Illinois

    Aug 3, 2009 11:15 am

    Based on preliminary data for Illinois, the statewide average temperature for July was 70.4 degrees, 5.3 degrees below normal. This ranks as the coldest July in the statewide records and a degree colder than the previous record set in 1924 (71.5 degrees), according to State Climatologist Jim Angel of the Illinois State Water Survey (http://www.sws.uiuc.edu).

  • Cold, dry December ends a warm year in Illinois

    Jan 4, 2017 4:30 pm

    The statewide average temperature for December was 28.6 degrees, 1.3 degrees below normal, according to Illinois State Climatologist Jim Angel, Illinois State Water Survey, University of Illinois.

  • 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.

  • Climatologist compares rainfall from Hurricane Harvey with Chicago storms

    Sep 25, 2017 2:15 pm

    What would happen if the rain from Hurricane Harvey that fell in Houston, Texas, hit Chicago? The result would be unlike any rainstorm that Chicago has ever seen, according to Illinois State Climatologist Jim Angel.

  • Chicago skyline

    Climate studies focus on a new priority: urban areas

    Jul 15, 2021 1:15 pm

    Climate change affects cities, and cities affect the climate. Urban areas are hotspots for heat waves, flooding, and air pollution that ultimately affect human health and welfare. Scientists at the Illinois State Water Survey (ISWS) study the relationship between cities and climate to determine ways to make cities more resilient to these challenges.

  • snowy roadway

    Changing methods for road salt application may ease environmental effects

    Feb 8, 2017 4:30 pm

    Salt crystals on roads and parking lots shimmer in the muted sunlight of an Illinois winter day. Once washed away into rivers and streams, salt contaminates the local environment, according to groundwater geochemist Walt Kelly with the University of Illinois’ Prairie Research Institute (PRI).

  • Chances of a White Christmas in Illinois This year

    Dec 14, 2012 7:30 pm

    What are the chances of a white Christmas in Illinois this year?  Historically, the highest odds are in northern Illinois, according to State Climatologist Jim Angel at the Illinois State Water Survey.

  • Chance of a White Christmas in Illinois

    Dec 15, 2014 3:45 pm

    It's beginning to look a lot like Christmas, but will it be white?  A white Christmas is defined as at least an inch of snow on the ground on Christmas Day. It should come as no surprise that the highest odds are in northern Illinois, according to Illinois State Climatologist Jim Angel, Illinois State Water Survey, University of Illinois.

  • Central Illinois weather station is upgraded to track air pollution particles

    Jan 17, 2018 2:00 pm

    After 23 years of data collection on atmospheric conditions at the Bondville Environmental and Atmospheric Research Site, a team from the National Oceanic and Atmospheric Administration worked with scientists at the Prairie Research Institute to move the monitoring system to a new temperature-controlled building.

  • Innovative microwave sensors deployed on an unmanned aerial system over the I-FARM facility for soil and biomass sensing in 2024. Photo credit Mohamad Alipour.

    Center for Digital Agriculture, Prairie Research Institute partner to support joint agriculture research

    May 5, 2025 10:00 am

    The Center for Digital Agriculture and the Prairie Research Institute have partnered to offer seed funding for joint research projects.

  • 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.

  • 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. 

  • Buying a home in Illinois? You'll need PRI for that.

    Feb 6, 2020 1:00 pm

    For every Illinois home sold, the Prairie Research Institute provides data needed for banks, title companies, insurance companies, and consumers to make informed decisions about home ownership. 

  • Bondville weather station

    Bondville weather station has a long history of research partnerships

    May 3, 2022 1:15 pm

    Like clockwork, monitoring towers and scientific gadgets run continuously at the Bondville Environmental and Atmospheric Research Site (BEARS) in central Illinois, gathering data on current weather, climate, and atmospheric conditions. The facility caters mainly to government agencies and university researchers, offering services that few other weather stations provide.

  • Bitter cold in January likely won’t reduce field crop pests in the spring

    Mar 14, 2019 1:30 pm

    Despite the record cold air temperatures, soil temperatures averaged slightly warmer than normal this winter. Consequently, the Arctic conditions are expected to have little effect on overwintering field crop insect pest populations.

  • Big temperature swings in November, wrapping up an otherwise mild fall

    Dec 8, 2022 2:15 pm

    Temperature swings in November were extreme in Illinois with slightly cooler than normal temperatures overall, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey. Meanwhile, most of the state had drier than normal conditions, which extended the dry streak in summer and fall. Near to above normal snowfall fell across the state.

     

  • Be Prepared for Natural Disasters to Keep Well Water Safe and Clean

    Mar 28, 2013 2:45 am

    Floods, droughts, and power outages can affect the safety of water supplies in private wells.  Being prepared for the unexpected may minimize the damage, according to Steve Wilson, hydrologist at the Illinois State Water Survey, University of Illinois at Urbana-Champaign.

  • CoCoRaHS logo

    Backyard weather observers contribute to science

    Mar 29, 2023 10:45 am

    Whether you enjoy watching the weather or hope for more accurate local forecasts, reading a rain gauge in your own backyard as a volunteer to the Community Collaborative Rain, Hail & Snow (CoCoRaHS) network can make a big contribution to spot-on forecasts and studies of precipitation and climate, according to Trent Ford, Illinois State Climatologist at the Illinois State Water Survey (ISWS).

  • 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.

  • A Wet May, Spring, and Year to Date for Illinois

    Jun 3, 2013 2:30 am

    The statewide precipitation for May was 6.87 inches, 2.25 inches above the long-term average, and the 12th wettest May on record, according to Jim Angel, Illinois State Climatologist at the Prairie Research Institute, University of Illinois.

  • A Wet August Wraps Up a Cool, Wet Summer in Illinois

    Sep 2, 2014 3:45 pm

    The 12th wettest August in Illinois finishes out the 10th wettest summer on record. While August was slightly warmer than average, the summer was cooler than average, according to Illinois State Climatologist Jim Angel, Illinois State Water Survey, University of Illinois.

  • A Wet April and Record-Warm January-April in Illinois

    May 2, 2017 4:15 pm

    The statewide average precipitation for April in Illinois was 7.01 inches, 3.23 inches above normal and the second wettest April on record, according to Illinois State Climatologist Jim Angel at the University of Illinois’ Illinois State Water Survey.

  • A wet and wild January finally brings winter to Illinois

    Feb 6, 2024 9:15 am

    Mild weather carried over from December into January in Illinois, when frigid temperatures and winter storms hit mid-month. Rain and snowfall in January took a big bite out of drought in the state, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey.  January precipitation tied for the eighth wettest January on record.

  • snow and frost on tree branches

    A warm start to January, followed by snow and record-breaking cold

    Feb 1, 2019 2:15 pm

    January 2019 will be a month remembered by an unseasonably warm start, followed by a torrent of winter storms, and ending with a monumental Arctic air outbreak that shattered many record-cold temperatures across the state.

  • A warming climate is evident in new winter plant hardiness map

    Nov 16, 2023 2:00 pm

    Changes in the new 2023 US Department of Agriculture’s plant hardiness map are strong evidence of global warming.

  • A warm, dry September extended summer in Illinois

    Oct 4, 2021 8:15 am

    The statewide average temperature of 69.4 degrees in September was 2.6 degrees above average, but the humidity was lower than in the previous months. 

  • Awareness of Flood Risk Lessens Losses

    Mar 24, 2012 8:00 pm

    Damages as a result of flooding happen unnecessarily every year in the U.S. and in the U.K., much to the shock of many home and business owners who suffer losses in floodplain areas.  It is vital to raise public awareness for citizens who are at risk for flood losses and must understand how much risk they face and how to mitigate the hazard, according to speakers at the Illinois State Water Survey (ISWS) and University of Leeds workshop in Champaign on April 17.

  • August wrapped up a mild and drier summer in Illinois

    Sep 1, 2023 2:45 pm

    The heatwave in late August was intense, but the average temperature and rainfall for the month were nearly normal based on long-term records, according to Illinois State Climatologist Trent Ford at the Illinois State Water Survey. Likewise, the summer season temperature was within 1 degree of normal with slightly drier conditions.