Best chances for rainfall will be across southern sections of the state. Fair weather is expected to return for the coming weekend, with warmer temperatures and a chance for showers and thunderstorms by early next week. The ability of the air to hold water vapor is dependent upon its temperature. The higher the air temperature, the greater the amount of water vapor that the air can potentially hold. When the air temperature falls to the dewpoint, the air is said to be saturated, as it cannot hold any more water vapor.
Any excess moisture is condensed out into liquid or ice.
Relative humidity is determined by the amount of water vapor that is actually in the air divided by the amount that could be potentially held by the air at that temperature level. Many of you may have a sensor that gives wet bulb temperature, which is not the same as dewpoint temperature. Given the wet bulb temperature, one can also obtain the dewpoint temperature and relative humidity. For reference, the dewpoint temperatures will always be less than or equal to the wet bulb temperature, which will always be less than or equal to the air temperature. A common rule of thumb in frost control strategy assumes the minimum temperature on a given morning will approach the dewpoint temperature taken the prior evening.