When it comes to weather forecasts, the terms "partly cloudy" and "partly sunny" are often used interchangeably. However, the National Weather Service (NWS) uses these terms differently. Let's take a closer look at the difference between "partly cloudy" and "partly sunny" according to the NWS.
NWS Definition of "Partly Cloudy"
The NWS defines "partly cloudy" as a sky condition where 3/8 to 5/8 of the sky is covered by clouds. This means that there will be some breaks in the clouds, allowing for periods of sunshine throughout the day. The amount of cloud coverage can vary throughout the day, but it will generally be a mix of sun and clouds.
NWS Definition of "Partly Sunny"
On the other hand, the NWS defines "partly sunny" as a sky condition where 3/8 to 5/8 of the sky is covered by clouds, but there will be more periods of sunshine than in a partly cloudy sky. This means that while there will still be some breaks in the clouds, there will be more sun than clouds throughout the day.
Why the Difference Matters
While the difference between "partly cloudy" and "partly sunny" may seem minor, it can actually have a significant impact on how we plan our day. For example, if you hear that the forecast is "partly sunny," you may be more likely to plan outdoor activities since there will be more sun than clouds. However, if the forecast is "partly cloudy," you may want to be more cautious since there will be more periods of clouds.
Other Sky Conditions
Of course, "partly cloudy" and "partly sunny" are just two of many sky conditions that the NWS uses in its forecasts. Other conditions include "mostly cloudy," "mostly sunny," "partly clear," and "mostly clear." Each of these conditions describes a different level of cloud coverage and can help us better understand what to expect from the weather.
Conclusion
While "partly cloudy" and "partly sunny" may seem like interchangeable terms, the NWS uses them to describe different levels of cloud coverage. Understanding the difference between these terms can help us better plan our day and be prepared for whatever weather comes our way.