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NWS Approximate Wet Bulb Formula:
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The NWS (National Weather Service) approximate wet bulb formula provides a simple method to estimate wet bulb temperature from dry bulb temperature and relative humidity. This approximation is useful for quick meteorological calculations and heat stress assessments.
The calculator uses the NWS approximate formula:
Where:
Explanation: This formula provides a simplified approximation of wet bulb temperature that is particularly useful for forecasting purposes and general meteorological applications.
Details: Wet bulb temperature is crucial for assessing heat stress, determining evaporation rates, and understanding human comfort levels in various environmental conditions. It's particularly important in weather forecasting and occupational safety.
Tips: Enter dry bulb temperature in °C and relative humidity as a percentage (0-100%). Both values are required for accurate calculation.
Q1: How accurate is the NWS approximation?
A: The NWS formula provides a reasonable approximation for general forecasting purposes but may not be as precise as more complex psychrometric equations for specific applications.
Q2: What is the typical range of wet bulb temperatures?
A: Wet bulb temperatures typically range from the dew point temperature up to the dry bulb temperature, depending on humidity levels.
Q3: When is wet bulb temperature most important?
A: Wet bulb temperature is particularly important during hot, humid conditions for assessing heat stress and determining cooling system efficiency.
Q4: Are there limitations to this approximation?
A: This simplified formula works best within typical atmospheric conditions and may be less accurate at extreme temperatures or humidity levels.
Q5: How does wet bulb temperature affect human comfort?
A: Higher wet bulb temperatures indicate reduced evaporative cooling potential, making it harder for the human body to regulate temperature through sweating.