Historical and Forecast Weather Data
for the Energy Trading Industry

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proven and most accurate forecasts available

Daily Weather Reports

Morning Preview
City Forecasts
Morning Summary
HDD/CDD Summary
Midday Update
Midday Summary
Tropical Update
Seasonal Forecast

We issue a series of weather reports each business day starting at 5AM CT, with updates again at midday. We also issue several of our reports on Sunday morning as well. These reports are available both on the website and by email distribution. You can view samples of our reports by clicking on the image links above.

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Wind Generation Forecasts

We produce wind generation forecasts for nearly every major wind farm in the US and Canada, covering more than 83,000 MW of installed capacity. Wind generation forecasts are available out to seven days, and are updated hourly. Frontier Weather utilizes an ensemble of many computer models to maximize forecast accuracy, including data from the NAM, DGEX, HRRR, RAP, SREF, GFS, CMC and more. Forecast data is available for individual wind farms and aggregated by power region in both graphical and csv data file format.

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Model Graphics & Data

We produce thousands of model graphics and data files each day for the US and international regions, including from the ECMWF operational and ensemble models. Maps and data file output is available for temperature, precipitation, snowfall and other data types. Many of our temperature anomaly maps update in real-time as model data becomes available and we send real-time email updates for the 12Z GFS and ECMWF models.

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HDD & CDD Data

Historical and forecast US and regional degree day data is available in a variety of formats. We produce hundreds of data files each day, including population, natural gas heating, and oil heating weighted degree day data. Files are available with various periods of record, and also with various weighting schemes. We have some data sets where weights are fixed to 2010 values, and others where weights vary by year based on population and consumption trends. All degree day data files are updated twice per day on business days, as well as on Sunday mornings.

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Hourly & Daily Data

We produce historical and forecast hourly and daily weather data files for hundreds of US and Canadian cities. Hourly forecasts extend out 7 days and are updated hourly, while our daily forecasts extend out 15 days and have two full updates each day. Historical hourly data is available back to 1998, and historical daily data extends as far back as 1948. You can see our period of records listed for some locations at Historical Data

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Forecast Accuracy

Avg daily MAE for 300+ cities, last 90 days
Days 2-5
Days 6-10
Days 11-15

Our 15 day forecasts have historically matched or outperformed most weather vendors during the last two years. During 2015, 98% of our daily forecasts in the 1-5 day period were within 5°F, as were 79% in the 6-10 day period and 62% in the 11-15 day period.

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Standard & Custom Packages

Basic Access Package

  • Morning Forecast Preview + Morning Weather Summary
  • Model Pop-weighted Temperature Anomalies
  • Quick Midday Update + Midday Weather Summary
  • Graphical City Forecasts
  • 16-30 Day + Seasonal Updates
  • Real-time Model Graphics
  • Tropical Reports

Wind Generation

  • Wind Generation Forecast
  • Model Graphics
  • Wind Generation Data
  • Estimated NG storage impacts
  • Historical Wind Generation Forecasts

Ag Weather Package

  • Everything in the Basic Access Package Plus:
  • Ag Weather Data Indices
  • Additional Ag Weather Graphics

Weighted Degree Day Data Only Package

  • Weighted Degree Day Report
  • Short and Long Term Storage Forecasts
  • US and Regional Degree Day Data and Forecasts
  • Weighted Degree Day History

Full Hourly & Daily Weather Data Package

  • Everything in Weighted Degree Day Package Plus:
  • Full Historical Data Sets
  • Historical & Forecast City Data
  • Ag Weather Data Indices
  • Model Data

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