How is a 30% chance of precipitation indicated in a weather report?

A 30% chance of precipitation in a weather report is indicated by "PROB30." This term is derived from the word "probability," which denotes the likelihood of a specific weather event occurring over a given time frame. When meteorologists state a probability of precipitation (PoP), it represents the estimated percentage chance that at least some measurable precipitation will occur at a specific location during a specified time period.

The use of "PROB" followed by a percentage directly communicates this probability and is a standardized format in weather reporting. Understanding this term is crucial for interpreting meteorological data accurately, as it allows for effective planning and decision-making based on expected weather conditions.

In contrast, the other terms do not properly represent the concept of probability of precipitation as commonly understood in meteorological contexts. "OVC30," "PRECIP30," and "CHANCE30" are not standard abbreviations used in official weather reports for indicating the probability of precipitation.