Weather Calculation Problems
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This document contains multiple practice quiz problems related to weather concepts: 1) Conversions between wind speed in knots and km/hr are provided. 2) Relative humidity percentages and calculations to determine water vapor holding capacities at different saturation levels are explained. 3) Temperature changes with elevation on a 5km mountain based on moist adiabatic lapse rates are calculated at various altitudes. 4) Additional practice problems involving dew point, LCL, and temperature calculations at different elevations on a 9km cliff are presented.
Weather Calculation Problems
- 2. If wind speeds are 70 knots. How fast are they in km per hour? If the wind is going 17,000 meters per hour, how fast are they going in knots? If the relative humidity is 75%, which ends up being 45 g of water vapor per meter cubed, what is the maximum amount of water vapor the air can hold if the relative humidity was 100%? If the air can hold up to 175 g of water vapor per cubic meter, how much water vapor is there in the air if the relative humidity is 10%? What about 30%? A mountain is 5 km high. The temperature at the base is 313 K. The dew point is 264 K. Once clouds begin forming, the air begins to cool down at a rate of 5*C/1000m. a. What is the temperature at the top of the mountain? b. What is the LCL? c. What is the temperature at 1.5 km up the mountain? d. What is the temperature at 4.5 mountain km?
- 3. 10 points If wind speeds are 70 knots. How fast are they in km per hour?
- 4. 15 points If the wind is going 17,000 meters per hour, how fast are they going in knots?
- 5. 20 points If the relative humidity is 75%, which ends up being 80 g of water vapor per cubic meter, what is the maximum amount of water vapor the air can hold if… Relative humidity is 100%
- 6. 30 points If the relative humidity is 75%, which ends up being 80 g of water vapor per cubic meter, what is the maximum amount of water vapor the air can hold if… Relative humidity is 30%
- 7. 20 points You are at the top of a 9 km cliff and the temperature is 223K. You saw that the first sign of clouds was at the altitude of 4 km. The moist adiabatic lapse rate is 8*C/1000m. What is the Dew point? What is the LCL? What is the temperature at the bottom of the cliff? What is the temperature at 500m?