Once again, Climate Impact Company raises the U.S. population weight CDD forecast for each month of meteorological summer (Fig. 1). The new forecast is the hottest so far and slowly getting closer to the hottest on record this century. Anticipated electricity demand on the U.S. grid is on the increase.

Meteorological spring (MAR/APR/MAY) 2024 was the 10th warmest on record. A record warm spring was observed in Ohio and Pennsylvania. The entire South, East-central, and East U.S. was MUCH ABOVE normal and included the second warmest spring on record for Maine, New Hampshire, Massachusetts, Connecticut, New York, New Jersey, Maryland, Michigan, West Virginia, Virginia, Arkansas, Oklahoma, and Texas.

To the north of a potential tropical system in the Gulf of Mexico and to the east of an approaching cold front and beneath strengthening subtropical ridging an area of “major” heat is forecast by NOAA centered on Iowa and the Mid-south U.S. on Sunday June 16. The maximum temperature in the “major” heat risk area is well into the 90’s with heat index to the 100-105F range. Sunday is the peak heat day. However, temperatures could be nearly as hot for most of next week.

Europe and Western Russia are the target of extreme weather and climate conditions through the spring season. On May 7, Moscow declared a state of emergency for crop conditions due to damage suffered during many freeze events occurring in early-to-mid May. Not helping is the long-term lack of precipitation in the Eastern Black Sea region throughout Southwest Russia. Conversely, much of Europe is soaking wet since March 1.