Guest Post by Bob TisdaleAUSTRALIA’S BOM UPGRADES ENSO TRACKER STATUS TO EL NIÑO ALERTOn November 18, Australia’s Bureau of Meteorology (BOM) upgraded the conditions in the tropical Pacific from El Niño “watch” to “alert” levels, “indicating at least a 70% chance of El Niño occurring”. See the rest of their update here.NOAA’S WEEKLY NINO3.4 DATA The sea surface temperature anomalies of the NINO3.4 region of the equatorial Pacific are a commonly used ENSO index. NOAA’s Oceanic NINO Index is a form of the data of that region. According to NOAA’s weekly sea surface temperature data for the NINO3.4 region, as of...