Highlight: Support for heavy precipitation will fade.
Medium-range 6-10 Day Forecast Valid April 7-11, 2018
Medium-range 11-15 Day Forecast Valid April 12-16, 2018
Days 6-10/11-15 commentary: Widening late period cold across southern Canada in the 6-10 day period while to the south most of the U.S. is warmer than normal especially south of snow cover. In the 11-15 day period The Midwest is cold while western warmth eases and new warmth emerges late period in the Southeast.
Extended-range 16-20 Day Forecast Valid April 17-21, 2018
Days 16-20 commentary: Low confidence forecast indicates a colder trend in the Central U.S. while the Southeast/East is warmer. Forecast confidence is low.
Madden Julian Oscillation
Support for heavy rain fading: The MJO is in the East Pacific and quite strong lending support for short-term heavy precipitation events. However, the MJO is forecast to weaken during the medium-range particularly the 11-15 day period. In the 11-15 day period significant precipitation disappears from the U.S. forecast. Support for heavy precipitation in the 16-20 day period is also below normal due to a weak MJO.
