Spring is when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications.

The maps show the accumulation of base 50°F growing degree days (GDD) for three accumulation intervals: Last week is the number of that accumulated over the last 7 days. Next week is a forecast based on National Weather Service forecast guidance for GDD accumulation over the next seven days.

This accumulation is typically reported in Growing Degree Days. The USA-NPN generates daily Accumulated Growing Degree Day (AGDD) maps using a January 1 start date and two base temperatures, 32°F and 50°F. The left map below shows the accumulation of Growing Degree Days since Jan 1 of the current year, using a 32°F base temperature.

Growing Degree Days View the latest growing degree information for your zip code below or sign up for individual email alerts when degree days hit a target threshold in your area. Questions about how to use degree days on your operation?

This map compares the accumulation of base 50°F growing degree days (GDD) from March 15 to the current date, to the climatological (30-year) average. This map is a product of the Northeast Regional Climate Center, and part of a set of GDD Maps developed for the turf grass industry.

2009年3月7日 · With these maps, you can 1) track the extent of degree-day (heat unit) build-up so far this growing season using 3 common thresholds: 32°, 41°, and 50° F, 2) compare this year's heat unit build-up with 30-year historical average or "normal" heat units, 3) monitor deviations between the current year and normal heat-unit build up (which ...

2025年2月13日 · Change in Growing Degree Days in the Contiguous 48 States, 1948–2023. This map shows trends in the total number of growing degree days per year at 280 weather stations. The color and size of the symbols represent percent change between 1948 and 2023, based on the long-term average rate of change.

The Corn GDD tool uses daily gridded minimum and maximum temperature data from the Applied Climate Information System (ACIS). GDD are calculated from the gridded temperature data using the 86/50 method. Accumulated GDD GeoTIFF files were created for each year from 1981 thru the last calendar year.

Growing degree days are a simple way to adjust your practices based on the current weather. Use the following growing degree day maps and models to maximize your efficiency. Special thanks to Rick Wayne and Bill Bland of the UW-Madison Soil Science Department for creating and maintaining these maps for us.

Click small image below to view the full-size map. GDD Accumulation - Northeast. GDD Difference - Northeast. GDD Accumulation - New York. ... GDD Difference - West NY. GDD Accumulation - East NY. GDD Difference - East NY. Monitoring Sites Status-Table. Monitoring Sites Status-Graph ...