Currents with red arrows represent those that will bring warm water from the tropics poleward, and blue arrows represent currents that bring cold water equatorward from the poles. 20. Which currents will have the greatest impact on the United States? 21. Describe the temperature of the water that each of these currents will bring to the U.S. coast? 22. Use your previous answers to make a statement about the difference between- weather (temperature, specific humidity, and precipitation) along either side of the continent of North America..