Atmospheric Rivers Drive Western U.S. Flood Damages

news image
Special Stories
23 Jan 2020 2:00 AM
[NOAA by Alison Stevens]   New research recently published in Science Advances found that atmospheric rivers accounted for 84% of flood damages, or $42.6 billion, across the western United States from 1978-2017. Supported by NOAA's Regional Integrated Sciences and Assessments (RISA) and co-authored by California-Nevada RISA PI Alexander Gershunov, the study analyzed 40 years of data from the National Flood Insurance Program to quantify atmospheric rivers’ economic impacts. Not only were atmospheric rivers the primary driver across all 11 states, with annual average damages of $1.1 billion, but they also caused over 95% and even exceeded 99% of flood damages in some coastal areas of northern California and the Pacific Northwest. In addition, the authors used a recently developed atmospheric rivers intensity and duration scale varying from 1 (weak) to 5 (exceptional) to assess how flood damages change with each category. They found that each increase in the atmospheric intensity and duration scale corresponds to a roughly 10-fold increase in flood damages. Flood damages from atmospheric rivers are expected to increase in the face of rising population, increased development, and climate change. 
All Weather News
More
Wildfire Smoke Impacting Air Quality Across the West, Central U.S.

Wildfire Smoke Impacting Air Quality Across the West, Central U.S.

Smoke from large wildfires burning in the nor

27 Jul 2024 2:50 AM
Man Arrested After "Pushing Fiery Car Into Gully" to Start Park Fire

Man Arrested After "Pushing Fiery Car Into Gully" to Start Park Fire

Wild developments have surfaced from the stat

27 Jul 2024 2:50 AM
Relentless Rainfall Continues for the South

Relentless Rainfall Continues for the South

The Southern United States has exhausted its

27 Jul 2024 2:45 AM
Saharan Dust Reaching the Southern U.S.

Saharan Dust Reaching the Southern U.S.

Conditions are quiet in the tropical Atlantic

27 Jul 2024 2:40 AM
Non-Stop Heat Into Next Week

Non-Stop Heat Into Next Week

A stagnant ridge of high pressure has led to

27 Jul 2024 2:30 AM
Tropics: Post-Tropical Cyclone Bud, Wave in the Atlantic

Tropics: Post-Tropical Cyclone Bud, Wave in the Atlantic

Tropical Storm Bud formed in the Eastern Paci

27 Jul 2024 2:30 AM
Typhoon Gaemi Displays Unusual Spin Over Taiwan

Typhoon Gaemi Displays Unusual Spin Over Taiwan

Typhoon Gaemi (Kemi) is impacting Tawain this

25 Jul 2024 10:30 AM