5671c5dc_pe_and_Wine_Industry_Institute__Severe_Drought_Stress
[Observation] Leaf temperature (press between palm & hands or check with infrared thermometer) Warm to touch at mid-day (>100 F) [Severe Drought Stress] 
Much greater than 100 F
#208 - July 13, 2012 | Midwest Grape and Wine Industry Institute
Severe Drought Stress