NASA MODIS Image of the Day: December 27, 2011 – Dust storm in southwest Asia (afternoon overpass)
A dense cloud of dust swept across southern Afghanistan and Pakistan on December 20, 2011.
When the Moderate Resolution Imaging Spectroradiometer (MODIS) took this image from Aqua satellite at 9:25 UTC (2:25 p.
m. Pakistan Standard Time), the storm had reached the coast of the Arabian Sea. Rolling over this image will reveal an image captured by the Terra MODIS when it flew over the same region three hours earlier on the same day. At that time, the dust was largely hemmed in by the Makran and Sulaiman Ranges in Pakistan with only a few wisps reaching south over the Arabian Sea. The storm is being propelled by strong winds from the north. The winds picked up dust from dry lakebeds in the Hamun wetlands, on the border between Afghanistan and Iran. Concentrated plumes of dust rise from the pale wetlands to become a more diffuse cloud in the south and east. Dry lakebeds and wetlands are among the most common sources of dust in the world. Dust storms can happen any time of the year in Afghanistan. On average, Afghanistan experiences blowing dust one to two days per month in the winter and six days per month at the height of the summer. Zabon, an Iranian city located near the border in the Hamun wetlands, reports 81 dust storms per year. Blowing dust poses a hazard to transportation, as low visibility closes roads and airports. This particular storm prevented British Prime Minister David Cameron from visiting a British military base because the runway was closed for low visibility.
