Hurricane Watch: An announcement that sustained winds of 64 knots (74 mph or 119 km/hr) or higher are possible within the specified area in association with a tropical, subtropical, or post-tropical cyclone.
PSTN Definition The public switched telephone network (PSTN) is the worldwide collection of interconnected public telephone networks that was designed primarily for voice traffic. The PSTN is a circuit-switched network. That is, a dedicated circuit (also referred to as a channel) is established for the duration of a transmission, such as a telephone call.
â¢ PST is one of the time zones observed by North America. PDT is a variation of this time zone. â¢ Both PST and PDT are observed by several states in US, Canada, and Mexico. â¢ The purpose of PST is to tell the time in reference to GMT or UTC. However, the purpose of PDT is saving daylight time during the summer. â¢ PST is eight hours behind UTC. So, PST is UTC â 8. PDT is seven hours behind UTC. So, PDT is UTC â 7. So, the difference between PDT and PST is one hour. â¢ States that observe PST and PDT are as follows. The US states that follow PST and PDT are California, Idaho, Nevada, Oregon, and Washington. Canadian provinces where PDT is used during summers and PST the rest of the time are British Columbia and Yukon.