GWDD Decomposition · 2026-10-24 00z · Updated Oct 24, 2026 at 01:08 PM UTC / Oct 24 at 08:08 AM CT
NOAA Temperature Outlook
6–10 Day Temperature Outlook
8–14 Day Temperature Outlook
10-Day Cumulative Breakdown
HDD / CDD components per model
GFS
HDD 93.3
CDD 9.9
Total 103.2
IFS
HDD 83.2
CDD 13.5
Total 96.8
GEFS
HDD 93.3
CDD 8.4
Total 101.7
AIFS
HDD 78.0
CDD 13.8
Total 91.8
HDD-Only Forecast (Gas-Utility Weighted)
CDD-Only Forecast (Gas-Utility Weighted)
GWDD = HDD + CDD · all values gas-utility-consumption weighted across 9 EIA census divisions · National only · West not shown