Scattered damaging winds from severe thunderstorms will be possible across parts of the Northeast and Mid-Atlantic States Sunday. Excessive heat will continue over the southern U.S. Sunday before another round of heat arrives Monday through the central and southern U.S. spreading into the East by Independence Day. California will see excessive heat starting Tuesday. Read More >
El Niño: A warming of the ocean surface, or above-average sea surface temperatures (SST), in the central and eastern tropical Pacific Ocean. Over Indonesia, rainfall tends to become reduced while rainfall increases over the tropical Pacific Ocean. The low-level surface winds, which normally blow from east to west along the equator (“easterly winds”), instead weaken or, in some cases, start blowing the other direction (from west to east or “westerly winds”).
https://psl.noaa.gov/map/clim/sst.anom.anim.year.htm
Northern Sierra Precipitation (8-station Index in Sacramento Basin)
Central Sierra Precipitation (5-station Index in San Joaquin Basin)
Southern Sierra Precipitation (6-station Index in Tulare Basin)
Maps
El Niño 2015/16: A Historical Perspective (NCEI)
U.S. Risk of Seasonal Extremes During ENSO (ESRL)
ENSO across NOAA
El Niño/Southern Oscillation (NCEI)
ENSO Research and Monitoring (ESRL)
Societal & ecosystem impacts