To predict the path of the flight-disrupting traveler-stranding Icelandic ash cloud, look to the weather — we know conditions now, we can guess what will happen tomorrow and next week is blowing with the wind.

NASA has kept tabs on Eyjafjallajokul’s stream of ash, which has shown no signs of stopping since the April 15 eruption that caused a near total shutdown of airspace over Europe.  Most recently, the ash cloud disrupted travel in Ireland and the UK, but flights began today after the wind shifted west toward the Atlantic.

According to an Associated Press report, forecasters expect this pattern to last for about a week before the winds turn south, blowing the cloud back to Europe and possibly interfering with airspace.  It’s worth noting that meteorologists say the ash cloud’s path could change on a dime, so travelers are advised to watch the weather and keep a close eye on all flights.