The November gas population weight HDD was 552 compared to the 30-year normal of 589. The rank was 11th warmest of the past 20 years compared to the second warmest on record last year. The updated HDD ranking forecast for the remainder of winter is trending warmer and now ranks in the too 7 warmest for the past 20 years each of the next 4 months.

All models indicate at warmer than normal U.S. gas population weight HDD forecast through the first half of December. The outlook is adjusted somewhat warmer from 48 hours ago.

ost prominent in today’s medium-range forecast are the reversal in the North Atlantic oscillation/Pacific North America pattern(s) beginning later this week and indicating warmth in the West fades while emerging across the eastern half of the nation. The -PNA pattern should also lead to an increase in rain and snow in California in the extended-range.

The Canadian Operational model identifies a swath of heavy rain in the 5-day forecast extending from north of Hawaii into the Canadian West Coast and Washington. The 5-day forecast indicates over 10 in. of rain in this zone with high spots approaching 20 in. Widespread flooding complicated by high wind strikes Washington (and northward)!