Weather Articles

Typhoon Lan to Intensify and Threaten Okinawa This Weekend, Then Japan Monday

By Jonathan Erdman
October 19, 2017

After a relatively quiet year so far, the western Pacific Basin is back to life.

Atmospheric River Will Bring Heavy Rain, Mountain Snow to the Pacific Northwest Through the Weekend

By Brian Donegan
October 18, 2017

The first atmospheric river event of this rainy season will impact the Pacific Northwest.

Warmth Returns to the Midwest, Northeast This Week, Adding to One of the Warmest Starts to October on Record

By Brian Donegan
October 18, 2017

The weather pattern has returned to one that has been all too familiar over the past month.

Firefighters Making Significant Progress Against Deadly Northern California Wildfires, Officials Say

By Pam Wright
October 18, 2017

Here's the latest on the deadly wildfire situation in Northern California.

The Orionid Meteor Shower Peaks This Weekend: Where Viewing Conditions Could Block Your View

By Jonathan Belles
October 18, 2017

Halley's comet will bring meteors to Earth in this year's Orionid Meteor Shower. Here's where clouds and storms will hamper your view.

The International Space Station's Astronauts Finally Got a Chance to See Puerto Rico After Hurricane Maria. Here's What They Saw

By Ada Carr
October 18, 2017

The image was captured by astronaut Joe Acaba, whose parents were both born on the island.

Puerto Ricans Face Major Health Threat from Drinking Contaminated 'Superfund' Site Water, EPA Says

October 18, 2017

The desperation for drinking water has some residents taking major risks.

2017 On Pace to Be in Top 3 for Warmest Years on Record

By Jonathan Erdman
October 18, 2017

The trend of record or near-record warmth globally continued in September.

Spain, Portugal Wildfires Kill at Least 46; Portuguese Minister Resigns

October 18, 2017

Portugal's interior minister has resigned in the wake of yet another round of deadly fires.

Firefighters Injured as New Wildfires Burn in California

By Sean Breslin
October 18, 2017

At least six firefighters were injured in California fighting multiple new fires. Here's the latest.

Typhoon Lan May Rapidly Intensify to a Super Typhoon and Threaten Okinawa, Japan This Weekend

By Jonathan Erdman
October 17, 2017

The western Pacific Basin is poised to host yet another super typhoon.

Much-Needed Pattern Change in West Will Bring Rain, Cooler Temperatures to Fire-Ravaged California Late Week

By Brian Donegan
October 17, 2017

Fire-ravaged northern California will finally get relief due to a change in weather pattern this week.

New NOAA Maps Show the Torrents Harvey Unleashed on Texas

By Jonathan Belles
October 17, 2017

New maps show exactly how much rain fell during Harvey's trek across Texas and Louisiana.

Massive Environmental Crisis Rises in Puerto Rico as Raw Sewage Contaminates Waters After Maria

By Associated Press
October 17, 2017

Hundreds of thousands, still without water, have been forced to use contaminated streams for bathing and washing clothes.

15 Billion-Dollar Disasters Have Impacted the U.S. This Year; 2017 Tied for Second-Most All-Time

By Linda Lam
October 17, 2017

This year may set a record for most billion-dollar disasters.

Trump Says Military Distributing Supplies in Puerto Rico Is 'Something ... They Shouldn't Have to Be Doing'

By Sean Breslin
October 17, 2017

The president called on local groups to do more to help with the distribution of supplies on the island.

Three Dead, Hundreds of Thousands Lose Power as Post-Tropical Cyclone Ophelia Blasts Ireland, United Kingdom With High Winds

October 17, 2017

Ophelia brought high winds to Ireland and the U.K. as a post-tropical cyclone.

Ophelia Turns UK Sky Orange and Red and Causes Unusual Odor Aboard British Flights

By Chris Dolce
October 17, 2017

Smoke and dust particles turned the sky orange and red in the United Kingdom on Monday.

Invest 92L Could Develop Into a Tropical Depression or Tropical Storm Early This Week While Tracking Toward Bermuda

By Linda Lam
October 16, 2017

Invest 92L could develop into a tropical depression or tropical storm and impact Bermuda.

Post-Tropical Cyclone Ophelia Blasting Ireland, United Kingdom With Damaging Winds; Gusts Over 70 MPH Reported

By Brian Donegan
October 16, 2017

Ophelia is bringing high winds to Ireland and the U.K. as a post-tropical cyclone.

Featured Blogs

Meteorology of Saturday's Colombian Flood Disaster That Killed 254

By Dr. Jeff Masters
April 3, 2017

At least 254 people were killed in the in the city of Mocoa (population 40,000) in southwest Colombia near the border of Ecuador early Saturday, when torrential rains triggered a debris flow on a nearby mountain that surged into the town as a huge wall of water carrying tons of mud and debris. The disaster is the fourth deadliest weather-related disaster in Colombia’s recorded history.

Iconic American Destination Virtually Isolated for Rest of Year

By Christopher C. Burt
March 24, 2017

Half of the village of Big Sur, on the coast of central California, has lost its only access to the north following the demolition of the flood-damaged Pfeiffer Canyon Bridge along State Route 1 (also Rt. 1 or SR 1) on March 19. Although Rt. 1 to the south of Big Sur has reopened to traffic (after mud and rock slides were cleared) it is a long 70-mile journey along the windy but spectacular highway to Cambria, the next town of any significance where supplies can be had. CalTrans (California Department of Transportation) estimates it will take 6-9 months to rebuild a new bridge over the canyon.

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

By Stu Ostro
October 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
September 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
May 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

September 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.