December 2024 - Page 2 of 10 - Climate Impact Company

News

12/28/2024, 6:35 am EST

Snowy and Cold East U.S. Early to Middle January!

Beginning later in the first week of January an upper trough begins to lock-in on the U.S. East Coast, well supported by conventional climate signals such as negative phase AO, NAO, WPO, and EPO. Cold is pushed into the Southeast U.S. including Florida late period while a snowy pattern develops from the Upper Midwest to New England. During the week of Jan. 6-13, the upper trough amplifies as the high latitude blocking pattern strengthens.

12/27/2024, 7:22 am EST

Forecast Change: Models See Arctic Air Western Canada Days 6-10; Ejected Eastward Days 8-14/11-15!

Overnight, the U.S. gas population weight HDD forecast for Jan. 3-9 was revised colder by ALL models (except GFS). During Jan. 10-16, U.S. heating demand settles to the 30-year normal. The extended range HDD forecasts for the second half of January are near to below normal. Consequently, Jan. 3-9 is the coldest week of mid-winter.

12/26/2024, 4:20 am EST

Stratospheric Cooling/La Nina Climate Strengthening: Trend Is Away from Important Cold East U.S. in January

In a new twist, ECM is forecasting a cold stratosphere across the polar region and eastern North America in the 11-15-day period. Elusive stratospheric warming shifts to Eurasia. Beneath the cold stratosphere, GFS indicates a mild ridge pattern in the East U.S. instead of an evolving polar vortex pattern as previously reported.

12/26/2024, 4:18 am EST

La Nina Has Generated; Intensifying Rapidly!

The daily Nino34 SSTA has cooled to -1.06C qualifying as a moderate La Nina signature. The cooling is remarkable with a 30-day change of a stunning -0.81C. The subsurface is as impressive as a strong cool anomaly intensified across the equatorial East Pacific and upper ocean heat east of the Dateline has cooled to a peak for the evolution of La Nina during 2024.