When you check Notices to Airmen (NOTAMs) after August 22, 2013 you’ll notice some changes that will bring the U.S. NOTAM System closer to ICAO compliance and make them easier for airmen to read.
The FAA's Air Traffic Plans and Publications list gives basic pilot guidance on NOTAMs and has the full details on Notice #NOTC4908. The big differences will be in the Field Condition (FICON) NOTAMs, issued via a PIREP when field conditions are being unmonitored.
