WEATHER CONDITIONS
1 Clear, No Precipitation
2 Partly Cloudy
3 Overcast
4 Ground Fog
5 Intermittent Showers
6 Rain
7 Snow flurries
8 Snowing Hard and Continuously
9 Severe Weather Alert (Dust Storm - Blowing Snow - White Out - Freezing Rain - High Winds - Falling Trees etc)
ROAD SURFACE CONDITIONS
1 Bare Pavement
2 Spots of Ice
3 Black Ice
4 Standing Water or Flooding on Roadway
5 Slush or Pack Breaking up
6 Packed Snow
7 Intentionally left blank
8 Conditional Closure Chains Required - Traction tires are not sufficient
9 Highway Closed
You might hear a report like this: 12-37 for Santiam Pass - 22-76-2-68-C...The first numbers are the temperature, 22 degs. The second set are the weather then the road conditions, in this case Snow Flurries, Packed Snow. The 3rd number is new snow, the 4th number is roadside snow and the last letter is the current Chain Requirement, in this case Chains or Traction tires required.
