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Forecast guidelines for fire weather and forecasters, how nighttime humidity affects wildland fuels
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    "The forecasting of meteorological elements for the Fire Weather Program presents the meteorologist with a special challenge. In order to make his/her forecast beneficial to the user, it must be presented in terms that are meaningful. When forecasting humidity, especially at night, the forecaster should be cognizant of the effects of humidity on the wildland fuel complex. Some fire weather offices have adopted an adjective rating system in order to describe to users the effects of humidity on wildland fuel. For example, a nighttime humidity recovery rating such as poor or good is often used. Unfortunately, such subjective ratings may have different meanings to different forecasters and wildland managers. Unless the forecaster understands the relationship between relative humidity and fuel moisture, lie/she should use caution when assigning adjective ratings to forecast elements. This paper will outline how relative humidity, especially at night, affects different wild land fuels. In so doing, hopefully the field fire weather forecaster can make his/her forecast more useful to the wild land manager. More complete information on fuels and the effects of humidity on fuel moisture can be found in the National Wildfire Coordinating Group (NWCG) S-390 Fire Behavior Course"--Introduction

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