- The dust can reduce the effectiveness of military equipment
- A huge sandstorm aided ISIS in Ramadi in 2015
- Iraqi-led forces have been edging towards the Mosul city limits for several days
Irbil, Iraq (CNN)On Tuesday afternoon, the wind whipped up around Mosul as Iraqi troops closed in on the city's outskirts. Amid gusts of 25 miles per hour, a cloud of fine sand and dust shrouded the horizon, halting most army operations -- and handing a tactical advantage to ISIS.