How Accurate is the weather forecast?

Is forecasting the weather a simple task or a very complex one?

Forecasting the weather is a complex task because of all the factors inolved. Some things simply can't be perfectly presicted, such as whether or not precipiation will fall. Not to mention, weather can be chaotic and the longer a forecast you make, the less predictable it will be.

How does the accuracy of a weather forecast today compare to the accuracy of 20 years ago? Look for a specific comparison.

The accuracy has improved significantly from 20 years ago. Now, a five day prediction is accurate as a two day prediction from 20 years ago. This is because of technological advancements allowing more accurate weather predictions. It is still difficult to predict weather long term though.