New and Improved 30 day Global Forecasts
MWA updated its proprietary 30-day global weather forecast ensemble to the MPAS model (Model Prediction Across Scales), which was collaboratively developed by the National Center for Atmospheric Research (NCAR) and the climate modeling group at Los Alamos National Laboratory (COSIM). MWA modeling staff selected the latest update (Version 5) of this unique research model for conversion to an operational forecast platform based on several key features distinguishing MPAS from all other weather forecast models. Initial verification analyses show the model is highly stable and more accurate than the GFS model at forecast time scales beyond day-5.
The model is comprised of individual simulation components specific to atmosphere, ocean, land ice, and sea ice employing a unique hexagonal grid system especially suitable for higher resolution applications over any geographic area. Model output available to standard subscriptions include 30 day global forecasts of upper atmosphere and surface meteorological parameters; displayed graphically (including 5 day composites of temperature anomaly and precipitation), as well as in numerical form for over 200 cities. Forecasts specific to any city or global region can be customized to greatly enhanced resolution to satisfy individual user requirements
November 28 - Long Range Summary
Relatively mild temperatures in place across most of the U.S. this past weekend (despite widespread rainfall) are certain to plummet more than 15° degrees below average starting in the northwest quadrant of the country early this week. However, unlike most of November which was coldest for longest west of the Rockies, the opposite U.S. temperature gradient is anticipated to predominate December. Arctic air is of high forecast confidence to focus east of the Rockies the longest in December, more directly into the Midwest and East starting during the 2nd week of the month. Before then temperature volatility driven by fast moving coast to coast tracking storms is likely to average somewhat cooler than models forecast, especially across the northeastern quadrant of the U.S. (seasonal) as progressively colder air in their wake outweighs brief warming peaking during their approach. All extended range models flood the majority of the Eastern U.S. with cold air of varying intensity during the 11-15 day period, but all recent forecasts are considered too mild. Strong and prolonged high latitude blocking directing frigid arctic air across snow covered Canada with very little modification (weakening) along the way sets the stage for the coldest mid-late December in several years across the Midwest and East.
If your business or career depends on correctly predicting the weather, you can follow the pack or you can get ahead with MWA’s proprietary models and expert forecasts.