Grasshopper and Mormon Cricket
Outbreak Forecasts and Survey Information

U.S. Grasshopper Forecast Maps (Hazard Maps)

A collection of regional grasshopper forecast or hazard maps for the western United States compiled by USDA-APHIS starting in 1994.  The maps summarize the previous year's grasshopper densities to show the anticipated risk, or hazard, of grasshopper problems throughout the western U.S for the year specified. The number of eggs laid by grasshoppers during the summer and weather conditions in the winter and spring can have large impacts on grasshopper densities, but are not reflected in the forecast maps.

Hazard maps:  2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996, 1995, 1994

Western U.S. Adult and Nymphal Grasshopper and Mormon Cricket Survey Maps

Field surveys of grasshopper densities and mapping were done by USDA-APHIS-PPQ Western Region.

• 2023 Rangeland Grasshopper Hazard Map w/Mormon Cricket Presence
• 2022 Adult Grasshopper Survey
• 2022 Mormon Cricket Survey
• 2022 Rangeland Grasshopper Hazard Map w/Mormon Cricket Presence
• 2021 Adult Grasshopper Survey
• 2021 Mormon Cricket Survey
• 2021 Rangeland Grasshopper Hazard Map w/Mormon Cricket Presence
• 2020 Adult Grasshopper Survey
• 2020 Mormon Cricket Survey
• 2020 Rangeland Grasshopper Hazard Map with Mormon Cricket Presence
• 2019 Adult Grasshopper Survey
• 2019 Mormon Cricket Survey
• 2019 Rangeland Grasshopper Hazard Map with Mormon Cricket Presence
• 2018 Adult Grasshopper Survey Map
• 2018 Mormon Cricket Survey Map
• 2018 Rangeland Grasshopper Hazard Map with Mormon Cricket Presence
• 2017 Adult Grasshopper Survey Map
• 2017 Mormon Cricket Survey Map
• 2016 Adult Grasshopper Survey
• 2016 Mormon Cricket Survey Map
• 2016 Rangeland Grasshopper Hazard Map with Mormon Cricket Presence
• 2015 Adult Grasshopper Survey Map
• 2015 Mormon Cricket Survey Map
• 2014 Adult Grasshopper Survey Map
• 2014 Mormon Cricket Survey Map (based on 2014 surveys)
• 2013 Adult Grasshopper Survey Map
• 2013 Mormon Cricket Survey Map (based on 2013 surveys)
• 2013 Mormon Cricket Hazard Map (based on 2012 surveys)
• 2013 Rangeland Grasshopper Hazard Map with Mormon Cricket Presence
• 2009 Adult Grasshopper Survey Map (November 2009)
• 2009 Nymphal Grasshopper Survey Map (August 2009)
• 2008 Adult Grasshopper Survey Map
• 2007 Adult Grasshopper Survey Map (July 2007)
• 2007 Adult Mormon Cricket Survey Map (July 2007)
• 2006 Adult Grasshopper Survey Map (October 2006)
• 2006 Adult Mormon Cricket Survey Map (October 2006)
• 2005 National Adult Grasshopper Survey Map (August 26, 2005)
• 2005 National Mormon Cricket Survey Map (August 26, 2005)
• 2005 Nymphal Grasshopper Survey Map (June 24, 2005)
• 2004 Adult Grasshopper Survey Map (Oct 20, 2004)
• 2004 Nymphal Grasshopper Survey Map (Oct 1, 2004)
• 2004 Mormon Cricket Survey Map (Oct 1, 2004)
• 2003 Grasshopper Adult Survey Map (Oct 14, 2003)
• 2003 Grasshopper Nymphal Survey Map (Aug 8, 2003)
• 2003 National Mormon Cricket Survey Map (Oct 14, 2003)
• 2002 Adult Grasshopper Survey Map (Oct 25, 2002)
• 2002 Nymphal Grasshopper Survey Map (Oct 8, 2002)
• 2002 Mormon Cricket Density (Oct 8, 2002)

* Please note: Dates on the maps indicate when the map, NOT the survey sampling, was completed. For example, the Grasshopper Nymph Map is an early-season survey, whereas the Adult Map is a late-season survey.

Friendly URL: https://www.ars.usda.gov/pa/nparl/pmru/GrasshopperMaps