Here's what several webcams are doing across the US.
Pick a state and you can see what's going on after you enter a zipcode or city, state: http://www.instacam.com/default.asp
Here's a link from the UofA Atmospheric Sciences department which shows a great view of the Catalina Mountains in real time. (Pick a sidebar of Satellite Imagery or Radar for good state or local views including animation.): http://www.atmo.arizona.edu/index.php?section=weather
NOAA is the National Oceanic and Atmospheric National Weather Service (a one-stop weather information center) at www.weather.gov/ You can get weather warnings by state as well other
information.
Let us know if you find other links you think will be useful.
More Links for Weather Information:
ROAD CONDITIONS – ADOT site includes a map of road closures caused by severe weather conditions, construction and other situations: www.az511.gov
STATE ROAD CONDITION HOT LINE: ADOT has an automated phone system which can be reached by dialing 511 from a cell phone or a home phone. A recorded phone message will prompt you through the system.
To check road conditions around Tucson and the rest of the state:
The Pima County Sheriff’s Department road hot line: 547-7510.