GWDD Decomposition · 2026-08-24 00z · Updated Aug 24, 2026 at 09:07 PM UTC / Aug 24 at 04:07 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 8.7
CDD 108.7
Total 117.4
IFS
HDD 4.0
CDD 113.3
Total 117.3
GEFS
HDD 5.3
CDD 113.5
Total 118.8
AIFS
HDD 3.7
CDD 116.9
Total 120.6
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