New Delhi, As of now, the weather conditions are indicating that there would be less dense-fog hours in north India this year compared to the last year. The reason behind this is being attributed to the lesser numbers of Western Disturbances that are expected this season compared to 2011 winters. In absence of Western Disturbance, dry northerly winds are expected to dominate the season.
These dry winds are short on the humidity level, which is important for the development of fog, so chances of dense fog formation are less. Fog formation also depends on the speed of the wind, which counts on pressure. If the pressure gradient is high, the wind speed would pick up, just like what we are about to experience over northwestern and Indo-Gangetic plains during the next two days.
During the next two days, northerly winds are expected to blow with an average speed of around 20 kmph over north and east India. The wind speed is high in these regions as under clear skies, days are sunny and the difference between maximum and minimum is high which is creating greater pressure gradient. So, there will be less mist or haze during the next two days over the region as strong winds would not let moisture in the air stay for long.
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