Tables 12.2 and 12.3, respectively. The time periods that SNTHERM-RT predicted snow
cover on the road was not used in the calculation of the RMSE. In both tables the first
number in each column is the RMSE value for the entire period when the road surface
was bare. The second number in each column is the RMSE value for the period from
DOY 73 at 18:00 L to DOY 75 at 06:00 L. As indicated above, by not removing the snow
from the road to correspond to removal or chemical application by Iowa DOT we do not
correctly represent the road surface conditions.
Fig. 12.6. SNTHERM-RT predicted road surface temperature using the average solar
flux, observed meteorological conditions, and the observed cloud conditions. Also
plotted is the maximum and minimum predicted road surface temperatures based on the
ensemble forecast model meteorological conditions.
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