GWDD Decomposition · 2026-07-13 00z · Updated Jul 13, 2026 at 09:08 PM UTC / Jul 13 at 04:08 PM 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 3.5
CDD 130.9
Total 134.4
IFS
HDD 1.9
CDD 149.9
Total 151.7
GEFS
HDD 1.7
CDD 137.1
Total 138.7
AIFS
HDD 1.4
CDD 152.8
Total 154.3
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