Rain falling before and during matches on Wednesday and Thursday could have a impact on the results of several key matches.
The matches most likely to be impacted by rain are taking place in Manaus, Porto Alegre and Recife.
All three of these matches feature teams that are fighting to advance from Group stage into the round of 16.
The Wednesday match in Porto Alegre between Nigeria and Argentina will have to deal with some rainfall and perhaps a thunderstorm. A soaking rain fell overnight which could have a lasting impact on the playing surface regardless of how much additional rain falls during the match.
Later in the day, the match between Honduras and Switzerland, taking place in Manaus, will be at risk for a shower or thunderstorm. The heat will also be a concern for this match as competitors deal with the grueling conditions of the Amazon for 90 minutes.
Shifting to Thursday, all eyes will be on the early match between the United States and Germany that will take place in the tropical city of Recife. A surge of tropical moisture leading up to the match will produce numerous showers through the day on Thursday. As a result, the playing conditions could affect the strategies of both teams as they face off in an attempt to move on to next round.
The other matches on Wednesday and Thursday will be largely rain-free, and temperatures are expected to be seasonable.
Cool and unsettled weather will continue across the Northeast through late week.
Relief is on the way for portions of the Plains that are in the grips of the ongoing drought.
A tropical wave west of the Cape Verde Islands looks like it could be the next named tropical storm in the Atlantic Basin.
It was a rather active past few days with tornadoes, flash flooding, and damaging winds targeting many communities.
A pair of tropical threats will target areas from China and Taiwan to Guam this week.
Television meteorologists and weather reports have the responsibility to provide the public with potentially life-saving information, even if it requires the interruption of a popular television program.