GFS vs ECMWF U.S. demand-hub forecast (15-day) - Run #4066
Reporting Date: 2026-10-10T12:00:00Z
Completed
Run Details
- State
- Completed
- Started At
- October 10, 2026 at 12:25 PM
- Completed At
- October 10, 2026 at 12:25 PM
- Duration
- less than a minute
Data Preview
{
"models": {
"gfs": "gfs_seamless",
"ecmwf": "ecmwf_ifs025"
},
"source": "Open-Meteo",
"locations": [
{
"id": "chicago",
"lat": 41.85,
"lon": -87.65,
"label": "Midwest (Chicago)",
"divergence": {
"mean_abs_hdd_diff_by_day": 3.8886
},
"daily_series": [
{
"cdd_gfs": 1.3875,
"hdd_gfs": 0.0,
"cdd_ecmwf": 1.65,
"hdd_ecmwf": 0.0,
"valid_date": "2026-10-10",
"mean_temp_f_gfs": 66.3875,
"mean_temp_f_ecmwf": 66.65
},
{
"cdd_gfs": 0.0,
"hdd_gfs": 1.3625,
"cdd_ecmwf": 0.9458,
"hdd_ecmwf": 0.0,
"valid_date": "2026-10-11",
"mean_temp_f_gfs": 63.6375,
"mean_temp_f_ecmwf": 65.9458
},
{
"cdd_gfs": 6.0542,
"hdd_gfs": 0.0,
"cdd_ecmwf": 4.45,
"hdd_ecmwf": 0.0,
"valid_date": "2026-10-12",
"mean_temp_f_gfs": 71.0542,
"mean_temp_f_ecmwf": 69.45
},
{
"cdd_gfs": 9.8083,
"hdd_gfs": 0.0,
"cdd_ecmwf": 10.4167,
"hdd_ecmwf": 0.0,
"valid_date": "2026-10-13",
"mean_temp_f_gfs": 74.8083,
"mean_temp_f_ecmwf": 75.4167
},
{
"cdd_gfs": 0.0,
"hdd_gfs": 1.9708,
"cdd_ecmwf": 0.0,
"hdd_ecmwf": 1.6917,
"valid_date": "2026-10-14",
"mean_temp_f_gfs": 63.0292,
"mean_temp_f_ecmwf": 63.3083
},
{
"cdd_gfs": 0.0,
"hdd_gfs": 7.7208,
"cdd_ecmwf": 0.0,
"hdd_ecmwf": 8.4667,
"valid_date": "2026-10-15",
"mean_temp_f_gfs": 57.2792,
"mean_temp_f_ecmwf": 56.5333
},
{
"cdd_gfs": 0.0,
"hdd_gfs": 8.8083,
"cdd_ecmwf": 0.0,
"hdd_ecmwf": 7.4208,
"valid_date": "2026-10-16",
"mean_temp_f_gfs": 56.1917,
"mean_temp_f_ecmwf": 57.5792
},
{
"cdd_gfs": 0.0,
"hdd_gfs": 24.0208,
"cdd_ecmwf": 0.0,
"hdd_ecmwf": 12.6417,
"valid_date": "2026-10-17",
"mean_temp_f_gfs": 40.9792,
"mean_temp_f_ecmwf": 52.3583
},
{
"cdd_gfs": 0.0,
"hdd_gfs": 22.6375,
"cdd_ecmwf": 0.0,
"hdd_ecmwf": 14.9458,
"valid_date": "2026-10-18",
"mean_temp_f_gfs": 42.3625,
"mean_temp_f_ecmwf": 50.0542
},
{
"cdd_gfs": 0.0,
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"cdd_ecmwf": 0.0,
"hdd_ecmwf": 6.4625,
"valid_date": "2026-10-19",
"mean_temp_f_gfs": 47.6583,
"mean_temp_f_ecmwf": 58.5375
},
{
"cdd_gfs": 0.0,
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"cdd_ecmwf": 0.0,
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"valid_date": "2026-10-20",
"mean_temp_f_gfs": 53.5833,
"mean_temp_f_ecmwf": 63.7458
},
{
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"valid_date": "2026-10-21",
"mean_temp_f_gfs": 56.1333,
"mean_temp_f_ecmwf": 63.3792
},
{
"cdd_gfs": 0.0,
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"cdd_ecmwf": 0.0,
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"valid_date": "2026-10-22",
"mean_temp_f_gfs": 54.725,
"mean_temp_f_ecmwf": 55.625
},
{
"cdd_gfs": 0.0,
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"cdd_ecmwf": 0.0,
"hdd_ecmwf": 14.7583,
"valid_date": "2026-10-23",
"mean_temp_f_gfs": 54.9208,
"mean_temp_f_ecmwf": 50.2417
},
{
"cdd_gfs": 0.0,
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"cdd_ecmwf": 0.0,
"hdd_ecmwf": 16.3417,
"valid_date": "2026-10-24",
"mean_temp_f_gfs": 50.275,
"mean_temp_f_ecmwf": 48.6583
}
],
"demand_weight": 0.35,
"noaa_region_hint": "midwest",
"cumulative_cdd_gfs": 17.25,
"cumulative_hdd_gfs": 139.225,
"cumulative_cdd_ecmwf": 17.4625,
"cumulative_hdd_ecmwf": 94.9792
},
{
"id": "nyc",
"lat": 40.71,
"lon": -74.0,
"label": "East (New York City)",
"divergence": {
"mean_abs_hdd_diff_by_day": 3.7906
},
"daily_series": [
{
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"cdd_ecmwf": 0.0,
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"valid_date": "2026-10-10",
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},
{
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},
{
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"valid_date": "2026-10-12",
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},
{
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},
{
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"hdd_ecmwf": 0.0,
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"mean_temp_f_gfs": 69.8167,
"mean_temp_f_ecmwf": 70.55
},
{
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"hdd_gfs": 4.6667,
"cdd_ecmwf": 0.0,
"hdd_ecmwf": 5.3375,
"valid_date": "2026-10-15",
"mean_temp_f_gfs": 60.3333,
"mean_temp_f_ecmwf": 59.6625
},
{
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},
{
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},
{
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"cdd_ecmwf": 0.0,
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"valid_date": "2026-10-18",
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"mean_temp_f_ecmwf": 46.1333
},
{
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"mean_temp_f_ecmwf": 50.8417
},
{
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"mean_temp_f_ecmwf": 56.2667
},
{
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},
{
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},
{
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{
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}
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},
{
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{
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{
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},
{
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},
{
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},
{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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}
],
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},
{
"id": "houston",
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},
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{
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},
{
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{
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{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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}
],
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"cumulative_hdd_gfs": 10.375,
"cumulative_cdd_ecmwf": 195.3166,
"cumulative_hdd_ecmwf": 0.0
},
{
"id": "atlanta",
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"divergence": {
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},
"daily_series": [
{
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"valid_date": "2026-10-10",
"mean_temp_f_gfs": 62.8292,
"mean_temp_f_ecmwf": 61.4917
},
{
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"hdd_ecmwf": 0.0,
"valid_date": "2026-10-11",
"mean_temp_f_gfs": 65.4667,
"mean_temp_f_ecmwf": 65.0917
},
{
"cdd_gfs": 5.9833,
"hdd_gfs": 0.0,
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"hdd_ecmwf": 0.0,
"valid_date": "2026-10-12",
"mean_temp_f_gfs": 70.9833,
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},
{
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"valid_date": "2026-10-13",
"mean_temp_f_gfs": 76.2292,
"mean_temp_f_ecmwf": 70.9625
},
{
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},
{
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Feed Information
Feed Type
GfsEcmwfUsDemandHubForecastFeed