Feb 7, 2018
Leaf Wetness Update - Feb 7, 2018
Dry weather has remained in place for the past two weeks, resulting in low humidity levels and limited levels of leaf wetness. No leaf wetness was recorded at the Roll and the YAC monitoring sites during this period while several short periods of wetness were observed at the North Gila site (Table 1). Higher levels of leaf wetness, ranging from 3.9 to 6.4 hours/day, have been recorded at the South valley site during the past four days and may warrant an uptick in disease monitoring (Table 1).
Temperatures near ground level (Table 1) have generally remained above freezing during the past two weeks. Exceptions (sub-freezing near surface temperatures) have been reported at Roll (24, 25 & 27 January), YAC (25 January) and South (27 January). Medium term forecast models suggest a trough of low pressure will impact the Yuma area Sunday through Tuesday, producing windy and cooler weather with a slight chance for precipitation