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Drift Risk Advisor

Step 1: Select your closest Mesonet site.

Step 2: Select your request type

Step 3: Select a time period

Data Range End Date/Time
  • Results will be shown for the data range before this date and time.
  • The current date and time will be used if no value is entered

Step 4: Set the limits according to your product label.
* Indicates required fields

Lower Limit
Upper Limit

Average Wind Speed* (mph)

Air Temperature (°F)

Relative Humidity (%)

A relative humidity below 50% warrants caution, especially for temperatures over 75°F or fine droplets smaller than 150 microns. If temperatures are cooler or droplets are larger, lower humidity values might be acceptable.

Maximum 1-hr Rainfall (in.)

Step 5: Check allowable wind directions.

The Drift Risk Advisor is a weather-based forecast tool for planning spray applications. It does not replace the best judgement of the applicator or applicator responsibility to follow label restrictions due to actual field conditions.