If the temperature and dewpoint are within 2°C of each other, what weather phenomenon would you expect?

When the temperature and dew point are within 2°C of each other, it indicates a high level of humidity in the air. This proximity between temperature and dew point suggests that the air is nearly saturated with moisture, leading to the likelihood of fog formation.

Fog typically occurs when temperatures drop at night or in the early morning, cooling the air to a point where it can no longer hold all of its moisture, thus resulting in condensation. Since the dew point represents the temperature at which air needs to cool for saturation to occur, a narrow gap of 2°C between temperature and dew point is a strong indicator that fog is likely to develop.

Clear skies would not be expected in this scenario, as high humidity usually leads to cloud formation. Thunderstorms require more dynamic weather conditions, such as significant atmospheric instability and lifting mechanisms, making them less likely solely based on the close temperature and dew point. Heavy snow also necessitates specific colder temperatures and moisture conditions, which are not directly inferred just from the temperature and dew point relationship.

Thus, the expectation of fog when temperature and dew point are within 2°C is accurate and aligns with meteorological principles.