Snow and ice removal: timing the treat-and-plow window before the freeze

Pre-treat too early and it's wasted; too late and the bond sets. Here's how pavement temperature, timing, and precip type define the snow and ice removal window.

Snow and ice work lives and dies on timing. The same storm can be an easy clear or an ice-bonded mess depending on when you pre-treat and when you plow — and air temperature alone won’t tell you which.

Pavement temp leads air temp

Surface temperature lags and leads the air at different times of day. Brine applied to a road that’s still above freezing runs off; applied too late, after a bond forms, it works much harder. The treat window opens as the surface approaches freezing with precip on the way — not when the thermometer says 32.

What sets the window

Pavement temperature trend — falling toward or holding below freezing
Precip type and onset — snow, sleet, or freezing rain, and exactly when it starts
Timing of the pre-treat — early enough to bond to dry pavement, not runoff
Refreeze risk overnight — when melt water turns back to ice

Reading it as a window

Instead of one number, the decision is a window: pre-treat here, plow there, watch for refreeze after. DecideWeather frames cold-weather operations the same way it frames a summer work window — a Go / Caution / Stop recommendation tuned to pavement conditions and timing, so the crew rolls when it counts.