Weather Articles

Severe Thunderstorm Threat, Including Tornadoes, Sweeps Into Lower Mississippi Valley Friday, Saturday

By Jonathan Belles
March 23, 2017

The first week of spring features a severe weather threat.

Blizzard Warning Issued in Colorado as Spring Snow Blankets Rockies, Great Lakes and New England into Next Week

By Brian Donegan
March 23, 2017

Winter's not over yet in the Front Range, Great Lakes or interior Northeast.

Numerous Severe Weather Threats Likely to End March Like a Lion

By Jonathan Belles
March 23, 2017

A progressive weather pattern will likely provide multiple rounds of severe storms.

California's Wet Pattern Returns; Mountain Snow to Add to Impressive Western Snowpack

By Jon Erdman
March 23, 2017

Wet weather is back after a recent and welcomed respite in the Golden State.

El Niño's Odds to Return By Late Summer or Fall Increasing

By Jonathan Belles and Brian Donegan
March 23, 2017

Odds are increasing that El Niño may develop by late summer or fall.

Here's Why There's More Than One Type of Tornado

By Chris Dolce
March 23, 2017

Here's the answer for all the different types of tornadoes you may hear about.

When The Rain Affects Your Travel Plans

By Holly Zynda
March 23, 2017

Whether in Southeast Asia, on African plains, in the American Southwest or the Australian outback, seasons of intense rain are part of nature’s rhythm. You’ll need to be prepared for potential storms and know how to respond to wetter weather.

New Cloud Types Added For the First Time in 30 Years

By Chris Dolce
March 22, 2017

One cloud species has been named volutus. It's more commonly known as a roll cloud.

5 Best and Worst U.S. Cities in Winter 2016-17

By Jon Erdman
March 22, 2017

One location shows up in both the worst and best winter lists – for good reason.

One Killed in Georgia as Severe Thunderstorms Rattle the South

By Andrew MacFarlane and Sean Breslin
March 22, 2017

Here's the latest on the round of severe weather to sweep through the Southeast.

'Marchuary' Continues in Northeast as New Cold Blast Moves Into Region

By Brian Donegan
March 22, 2017

The chilly March across the Northeast is expected to continue with a new blast of cold air this week.

With More Than 300 Tornadoes, It's the Most Active Start to a Year Since 2008

By Chris Dolce
March 21, 2017

The year is off to a tornadic start.

This Was Your Coldest Temperature of Winter 2016-17 and When It Occurred

By Brian Donegan
March 21, 2017

What were the coldest temperatures where you live in winter 2016-17?

Tornadoes in the Southeast May Be Influenced by Mountainous Terrain; VORTEX-SE Project Investigating This Spring

By Chris Dolce
March 20, 2017

Scientists are hoping to find out more this spring.

Evacuation Orders Lifted for Wildfire Burning near Boulder, Colorado

By Pam Wright and Sean Breslin
March 20, 2017

Here's the latest on the Sunshine fire, burning west of Boulder, Colorado.

Vernal Equinox: Science Behind the First Day of Spring 2017

March 20, 2017

Today is the Vernal Equinox, which is more commonly known as the First Day of Spring.

Wildfire Near Boulder, Colorado, Prompts Evacuations

By Pam Wright
March 19, 2017

The latest on the Sunshine fire, burning west of Boulder, Colorado.

Pattern Change Will Bring Return of Rain, Snow to California, Warmer Temperatures in Plains and South

By Linda Lam
March 19, 2017

If you think the weather has been in a rut lately, the week ahead will bring changes for many.

Snow Spreads Through Mid-Atlantic and Cape Cod Sunday

By Linda Lam
March 19, 2017

Don't worry. It's not another Stella. Just another wintry nuisance

The Two Warmest Februaries on Earth Since 1880 Have Occurred the Past Two Years

By Jon Erdman
March 18, 2017

Independent analyses once again find global temperatures among the warmest since the last 19th century.

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Featured Blogs

A Prolonged Series of Severe Threats—But How Severe?

By Dr. Jeff Masters
Marzo 23, 2017

As storm systems sweep across the country over the next week in classic late-March fashion, we can expect near-daily doses of severe weather over parts of the south-central and southeast United States. Most of the severe weather will plow through the regions most favored for stormy conditions in early spring, from Texas and Oklahoma across the Mississippi Valley into the Southeast states.

California Precipitation: From Famine to Feast

By Christopher C. Burt
Febbraio 25, 2017

It’s amazing what a difference one year can make. California’s five-year long drought has come to a dramatic halt (or at least interruption) this winter season. The latest California Drought Monitor report, released on February 23rd, has no portion of the state under ‘Extreme Drought’ conditions for the first time in four years. Last year on this date 61% of state was enduring such.

An extraordinary meteorological event; was one of its results a 1000-year flood?

By Stu Ostro
Ottobre 5, 2015

The confluence of meteorological ingredients the first weekend in October 2015 resulted in an extraordinary weather event with severe impacts. Was one of them a 1000-year flood?

Why the Arrest of a Science-Loving 14-year-old Matters

By Shaun Tanner
Settembre 16, 2015

By now, many of you have heard or read about the arrest of Ahmed Mohamed, a 14-year-old high school student from Irving, Texas. Ahmed was arrested because school officials called the police after he showed one of his teachers his homemade clock. Mistaken for a bomb, Ahmed was taken into custody, interrogated, shamed, suspended (still on suspension today, Wednesday), and reprimanded. All of this after it has been found that the "device" he brought to school was indeed, a homemade clock.

2013-14 - An Interesting Winter From A to Z

By Tom Niziol
Maggio 15, 2014

It was a very interesting winter across a good part of the nation from the Rockies through the Plains to the Northeast. Let's break down the most significant winter storms on a month by month basis.

What the 5th IPCC Assessment Doesn't Include

Settembre 27, 2013

Melting permafrost has the potential to release an additional 1.5 trillion tons of carbon into the atmosphere, and could increase our global average temperature by 1.5°F in addition to our day-to-day human emissions. However, this effect is not included in the IPCC report issued Friday morning, which means the estimates of how Earth's climate will change are likely on the conservative side.

Recent Infographics

Storm Surge

Storm Surge terms described and defined in the Storm Surge infographic by Weather Underground.

El Niño

To understand the science behind El Niño, and the associated precipitation, checkout this infographic by Weather Underground.

Why the Sky is Blue

Finally, childhood questions answered. Find out why the sky is blue in our latest graphic.