Weather Articles

Super Typhoon Lan, Now at Category 4 Intensity, Will Brush Okinawa This Weekend, Then Strike Mainland Japan With Flooding Rain, Winds

By Jonathan Erdman
October 20, 2017

The threats from Lan in Japan are coming into focus now. Here's what we know.

Colder Pattern Change Next Week May Include First Snow for Northern Great Lakes, Appalachians

By Brian Donegan
October 20, 2017

The Midwest and East will finally see a more persistent period of real fall weather next week.

Severe Thunderstorms With Damaging Winds, Hail, a Few Tornadoes Possible in the Plains, Mississippi Valley Saturday

By Jonathan Belles
October 20, 2017

A wave of severe thunderstorms is possible this weekend across the central Plains and the South.

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

By Jonathan Belles
October 20, 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.

Puerto Rican 'Superfund' Water Is Fine to Drink, CNN Report Finds

October 20, 2017

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

Puerto Rico, One Month After Hurricane Maria: 3 Million Without Power, 1 Million Without Water

By Sean Breslin
October 20, 2017

The numbers tell a story about the devastation in Puerto Rico.

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

By Brian Donegan
October 20, 2017

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

Winter Forecast Released: North Will Be Wet, South Will Be Dry and Warm

By Chris Dolce
October 20, 2017

Here's what to expect this winter, according to NOAA and The Weather Company.

Why Hurricane Maria Was Such a Catastrophe in Puerto Rico

By Jonathan Erdman
October 20, 2017

The meteorological factors playing into the tragedy in Puerto Rico and the Virgin Islands.

16 Billion-Dollar Disasters Have Impacted the U.S. This Year, Tying an All-Time Record, Thanks to the California Wildfires

By Linda Lam
October 20, 2017

2017 has now tied a record for most billion-dollar disasters.

What Are Your Odds of Snow on Halloween?

By Brian Donegan
October 19, 2017

Find out if you may need snow boots as part of your Halloween costume.

Widespread Warmth in Midwest, Northeast to Last Into Early Next Week; One of Warmest Starts to October on Record

By Brian Donegan
October 19, 2017

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

How to Help the Victims of Hurricane Maria in Puerto Rico

By Pam Wright
October 19, 2017

Giving money is the best way to support victims, so here's how you can help.

We Don't Know How Many People Died in Puerto Rico

By James Crugnale
October 19, 2017

The death count in Puerto Rico from Hurricane Maria is likely higher than the official number given by officials, and now Congress is demanding answers.

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 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.

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.

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

By
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.