GWDD Decomposition · 2026-05-29 00z · Updated May 29, 2026 at 09:06 PM UTC / May 29 at 04:06 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 24.5
CDD 64.7
Total 89.1
IFS
HDD 22.3
CDD 67.4
Total 89.7
GEFS
HDD 20.6
CDD 69.0
Total 89.6
AIFS
HDD 15.9
CDD 84.8
Total 100.7
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