Lake Effect Snow Season is Shifting and Contracting

Lake effect snow will still occur in a warming world, but by the late 21st century, we can expect a shortened lake effect snow season. Rather than peaking in fall and early winter, heavy lake effect snow would be pushed back later in the season, generally from January through March.

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Coastal Cities at Risk

Five years ago this month, Sandy made landfall in New Jersey as it transitioned to a non-tropical storm. The catastrophic flooding that followed resulted in an estimated $50+ billion in damage. On the storm’s fifth anniversary, we analyze the 50 largest U.S. populations at risk from coastal flooding from Atlantic basin storms.

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Here’s How Wildfire Pollution Harms Health

Large wildfires are becoming more frequent and widespread in the western U.S. Smoke from these fires is undermining decades of progress in reducing air pollution from tailpipes, power plants, and other industrial sources in many areas. Large fires are becoming more common and severe, and the smoke from these fires has serious public health impact

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More Frost-Free Days Means a Longer Growing Season

The growing season is now nearly two weeks longer on average across the U.S. compared to the beginning of the 20th century. While this may delight warm-weather lovers, warmer overnight temperatures can reduce productivity and quality of grains and fruits, which might increase their costs at the supermarket. Warmer average temperatures lead to an in

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lake effect snow

Less Lake Ice, More Potential Lake Effect Snow

Arctic air begins to race across the relatively milder water of the Great Lakes every fall, generating lake effect snow. These snowfalls can be intense, but are often localized. Several inches of snow can fall a few miles away from a place that only gets flurries. As the planet has warmed from the increase in greenhouse gases, so have the lakes, me

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lake effect snow

Lake Effect Snow Season is Shifting and Contracting

Lake effect snow will still occur in a warming world, but by the late 21st century, we can expect a shortened lake effect snow season. Rather than peaking in fall and early winter, heavy lake effect snow would be pushed back later in the season, generally from January through March.

more
wildfires and health

Here’s How Wildfire Pollution Harms Health

Large wildfires are becoming more frequent and widespread in the western U.S. Smoke from these fires is undermining decades of progress in reducing air pollution from tailpipes, power plants, and other industrial sources in many areas. Large fires are becoming more common and severe, and the smoke from these fires has serious public health impact

more
coastal flooding risk

Coastal Cities at Risk

Five years ago this month, Sandy made landfall in New Jersey as it transitioned to a non-tropical storm. The catastrophic flooding that followed resulted in an estimated $50+ billion in damage. On the storm’s fifth anniversary, we analyze the 50 largest U.S. populations at risk from coastal flooding from Atlantic basin storms.

more
longer growing season

More Frost-Free Days Means a Longer Growing Season

The growing season is now nearly two weeks longer on average across the U.S. compared to the beginning of the 20th century. While this may delight warm-weather lovers, warmer overnight temperatures can reduce productivity and quality of grains and fruits, which might increase their costs at the supermarket. Warmer average temperatures lead to an in

more
first freeze

The First Frost is Coming Later

Coming off of a warm September, warmer falls are becoming a trend across the U.S., with the first freeze (temperature below 32°F) of the season arriving later than before. This trend is not limited to one area of the country. The first freeze is coming a full month (31 days) later in Boise, Idaho, 27 days later in Las Vegas, Nevada, and 24 days lat

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More Warm Fall Days Across the U.S.

As the calendar turns to October, many people are excited to bring out their cool weather clothes. While parts of the western U.S. have already cooled enough to see snow, much of the U.S. will continue to be warmer than normal leading into this weekend. Here, we look at how the fall warming trend breaks down to individual warm fall days in cities a

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summers lasting longer

Summer is Lasting Longer Across the U.S.

While there is a lot of variation from year-to-year, that last summer-like day is coming later in the year for many of our U.S. cities. This effectively lengthens summer at the expense of the other seasons. Though the calendar continues to turn the same as ever, fall is arriving later while spring is arriving earlier on average — and in many

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summer lasting longer

Summers Are Lengthening While Winters Shrink

While the West has been feeling the heat, fall-like temperatures dominated the eastern half of the country in August. But just as the calendar flips to astronomical fall, summer-like heat is making a return to many of those same places. So this week we examine the last annual occurrence of a hot, summer-like day in these U.S. cities.

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climate extremes index

Climate Extremes Index

Harvey and Irma have brought devastating floods to Texas and Florida, while severe to exceptional drought has contributed to wildfires in Montana and the Pacific Northwest. These types of weather and climate extremes are trending upward, as indicated by the NCEI Climate Extremes Index. In addition to accounting for drought and hurricane winds, the

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rain increasing in the U.S.

More Downpours in the U.S.

Harvey and Irma have brought devastating floods to Texas and Florida, while severe to exceptional drought has contributed to wildfires in Montana and the Pacific Northwest. These types of weather and climate extremes are trending upward, as indicated by the NCEI Climate Extremes Index. In addition to accounting for drought and hurricane winds, the

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flood map irma

Here’s How You Can Help Hurricane Researchers Map Irma’s Flooding

I co-founded the U-Flood project during Hurricane Harvey. It's a simple, but powerful project to generate crowdsourced flood maps in real time. We have launched U-Flood for nine cities that are impacted by Hurricane Irma. If you could please pass this along to your friends, we can generate useful maps that help emergency managers as well as the

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