After the earthquake on 11 March 2011, many weather observation data from AMeDAS (JMA's automated weather observation and collection system) stations in Northern Japan had been suspended due to tsunami damages, network failure, and power outage.
After the earthquake on 11 March 2011, many weather observation data from AMeDAS (JMA's automated weather observation and collection system) stations in Northern Japan had been suspended due to tsunami damages, network failure, and power outage.
As of 15 April 2011, 99 percent of stations resumed operation after restoration work. Further, to ensure better weather monitoring and forecast for the affected areas, JMA has integrated weather data from NTT DoCoMo in support of JMA's weather monitoring network.