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US Weather Model Upgraded to Better Forecast Extreme Events

The National Weather Service upgraded its forecast model, with an eye on predicting extreme weather events better and faster.

by capitalizefinancial
March 23, 2021
in Sports
0
US Weather Model Upgraded to Better Forecast Extreme Events

BY SETH BORENSTEIN, AP Science Writer

The National Weather Service has turbocharged its lagging forecast model to better predict extreme weather events such as hurricanes, blizzards and downpours, as well as day-to-day weather.

By including much higher layers of the atmosphere, increased factoring of ocean waves and other improvements, the weather service’s update to its Global Forecast System is trying to catch up with a European weather model that many experts consider superior.

Tests for the past two years show the upgrade, which kicked in Monday, forecast heavy rains and snowfall 15% better five days out and improved hurricane and tropical storm tracks by more than 10%, better pinpointing storm formation five to seven days in advance.

Forecasters say this new model does not predict more rain and snow than actually arrives, which its predecessor had a tendency to do. The new model was significantly better at forecasting the massive Colorado snowstorm earlier this month, getting the storm arrival time and snow amounts far more accurately than the older version, said Vijay Tallapragada, chief of modeling at the agency’s Environmental Modeling Center.

Internal studies also showed the new model was generally more accurate earlier on downpours in the Southeast in February 2020, Hurricane Dorian in 2019 and Hurricane Michael in 2018.

“This is for the general day-to-day forecasting and for the extreme events, and you’ve got to get both right,” said National Weather Service Director Louis Uccellini.

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