May 2019 - Climate Impact Company

05/30/2019, 9:59 am EDT

Madden Julian Oscillation Is Catalyst to Historic U.S. Wet Pattern & More Recently Epic Severe Weather Outbreaks

The Madden Julian oscillation has frequently shifted across the equatorial East Pacific/Atlantic during the past 12 months making available tropical moisture to be entrained by the U.S. storm track to drive what has been the wettest 12 months in history. In May the MJO was very intense and the catalyst to the extraordinary severe weather pattern across the U.S.

05/24/2019, 9:38 am EDT

Flash Drought Risk in Southeast U.S.

The Southeast is turning drier and the potential for flash drought increases as late spring anomalous heat and dryness arrives and lasts for at least 10 days.

05/20/2019, 11:54 am EDT

Subsurface Equatorial Pacific Ocean Heat Fading – El Nino May End

The NCEP CFS V2 Nino34 SSTA forecast indicates the latest forecast (in blue) is fading away from El Nino more rapidly and with good reason as upper ocean heat in the eastern equatorial Pacific Ocean fades fast.

05/19/2019, 11:11 am EDT

Adverse Climate for the Central U.S. Continues

Another late season freeze for the northern Dakotas prolonging cold soil moisture temperatures followed by yeat another excessive rainfall event this week including severe weather episodes.

05/14/2019, 8:20 pm EDT

Polar/Tropical Climate Interaction Leads to 87F Northwest Russia

A large stretch (from the Dateline to tropical Africa) of tropical convection associated with the Madden Julian oscillation coupled with high latitude high pressure blocking (negative arctic oscillation) have combined to produce more extreme weather events. Included is a record 87F observed in Northwest Russia this past Sunday.

05/05/2019, 11:47 am EDT

Sudden Emergence of -NAO Pattern

A strong negative North Atlantic oscillation climate pattern has emerged and may last much of the remainder of meteorological spring. Implications include more wet weather for the U.S. and a general cool thermal regime and potentially prohibitive rains in Eastern Europe/Western Russia.

05/02/2019, 4:28 pm EDT

Are El Nino Global SSTA Patterns Changing?

Modern-day El Nino episodes have a tendency to occur while many other parts of the global oceans are also warmer than normal. This observation is a large change from the previous strong El Nino episodes of 1982-83/1997-98 when most of the oceanic heat and influence on atmospheric climate was consolidated in the tropical East Pacific. Consequently, our understanding of El Nino climate rooted in the influence on the atmosphere by the 1982-83/1997-98 warm ENSO events is different for many regions.