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Author: Dr. Simon Keeling

December 2025 – Final Guidance

by Dr. Simon Keeling -

+++ THIS FORECAST IS FOR PRIVATE CLIENTS ONLY AND MAY NOT BE DISTRIBUTED OR COPIED IN ANY WAY WITHOUT PRIOR PERMISSION. +++ DECEMBER 2025 - FINAL GUIDANCE ================================== Issued: Sunday 30th November 2025 Contact: simon@weatherweb.net HEADLINES ========== + Unsettled beginning of month + Near average temperatures + Wet west and south + Colder and drier later FACTORS AFFECTING DECEMBER 2025 FINAL

December 2025 – Preliminary Guidance

by Dr. Simon Keeling -

+++ THIS FORECAST IS FOR PRIVATE CLIENTS ONLY AND MAY NOT BE DISTRIBUTED OR COPIED IN ANY WAY WITHOUT PRIOR PERMISSION. +++ DECEMBER 2025 - PRELIMINARY GUIDANCE ===================================== Issued: Monday 17th November 2025 Contact: simon@weatherweb.net HEADLINES ========== + Frosty, fogg start, dry + Becoming more mixed + Risk sleet and snow FACTORS AFFECTING DECEMBER 2025 PRELIMINARY GUIDANCE ====================================================== + High pressure at

Getting ready for winter forecasting

by Dr. Simon Keeling -

  One of the charts we will be looking at closely in the coming months is the 10hPa Zonal Wind forecast from ECMWF. This is a measure of the strength of the west-east flow at 60N at the highest levels of the atmosphere. A strong flow tends to keep cold air closer to

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