The Climate Impact Company U.S. selected cities CDD forecast shifted hotter in this week’s update and is close to the 2022 and 2024 observations. Summer of 2022 ranked 3rd hottest on record for the U.S. while summer 2024 ranked 4th hottest. The observed summer 2025 CDD will rival the 2022 and 2024 heat primarily due to the anomalous heat observed in the PJM sector.

Neutral or weak ENSO events do not imply low skill climate forecasts. Recognizing the new mid-latitude (mostly warm) SSTA regimes can not only foreshadow climate patterns ahead but also recognize the potential for extreme events such as heatwaves, droughts, and flooding rainfall episodes.

An interesting comparison between ECM "weeklies" and the AI GFS ENS 2-4-week temperature anomaly forecast for Australia whereas there is agreement on the upper air pattern (which supports increasing risk of cold in July) and AI GFS ENS offers the cold while ECM "weeklies" doubts the cold risk.

Global atmospheric angular momentum (GLAAM) is currently sharply negative. Negative GLAAM patterns are frequently represented by a slower jet stream, tendency for semi-permanent trough and ridge patterns (caused by the slow down), and responsible for persistent and sometimes harsh weather patterns. The 15-day forecast by all operational models indicates -GLAAM eases but does not end while the CFS V2 6-week forecast carries -GLAAM through July.