Weather Articles

More Snow Expected into Friday in Northeast; Chilly Temperatures Dominate

By Brian Donegan
October 27, 2016

Last week's record warmth is a distant memory, and now snow is moving into parts of the Northeast.

Hurricane Seymour Rapidly Weakening After Reaching Category 4 Strength in the Eastern Pacific

October 27, 2016

Seymour is weakening rapidly well off the coast of Mexico.

World Series Forecast: Will Weather Be a Factor in Chicago?

By Jon Erdman
October 26, 2016

A relatively mild stretch is ahead for Games 3 through 5 in Chicago.

More Rain, Mountain Snow Kicking Off Hopeful Rainy Season in California, Oregon, Washington Through the Weekend

By Linda Lam
October 26, 2016

Rainfall usually begins to increase in late October in the West, and this year is off to a good start.

Record Warmth Closes Out October in Western, Central and Southern U.S.

By Chris Dolce
October 26, 2016

Records will fall through Halloween to end October.

Halloween 2016 Weather: For Many, It Will Be A Treat

By Brian Donegan
October 26, 2016

Will the weather be a trick or a treat where you live?

Mount Washington, New Hampshire: The Most Extreme Weather Observatory on Earth

By Brian Donegan
October 26, 2016

Mt. Washington, New Hampshire, is home to some of the world's most fascinating – and extreme – weather.

Antarctica’s Glaciers Experiencing Alarming Ice Loss Because of Warm Oceans

By Andrea Thompson
October 26, 2016

It has become increasingly clear in recent years that ocean waters are eating away at the undersides of the ice shelves that fringe Antarctica and buttress its many glaciers.

A Vicious Cycle: How LA’s Record Breaking Smog May Exacerbate Itself

By Sami Grover
October 26, 2016

Southern California recently experienced some of its worst smog in years. Persistent inversion layers caused by unusually hot, stagnant weather were trapping ozone and other smog particles, creating a build up of dangerously contaminated air. What’s interesting is the fact that the sources of these ozone emissions — trucks, cars, forest fires, etc. — are also major sources sources of the greenhouse gas emissions responsible for heating up our planet and increasing the likelihood of such hot, stagnant weather in the first place.

U.S. Tornadoes So Far in 2016 Continue Near 11-Year Low

By Chris Dolce
October 25, 2016

Here is a drought you can love. There have been far fewer tornadoes so far in 2016.

South May Not See Much Relief from Drought This Winter, Thanks to La Niña

By Linda Lam
October 25, 2016

Drought conditions will likely persist and potentially worsen this winter, courtesy of La Niña.

Three Weeks Later, Haiti in Ruins from Hurricane Matthew's Effects

By Sean Breslin
October 24, 2016

It could be months or even years until parts of Haiti are able to return to any sense of normalcy following Hurricane Matthew.

Super Typhoon Haima Damaged or Destroyed Nearly Every Home In This Philippine City, Official Says

By Pam Wright
October 24, 2016

This Filipino city was nearly wiped out by Super Typhoon Haima.

Carbon Dioxide Passed Critical Threshold in 2015

By Brian Kahn, Climate Central
October 24, 2016

It’s the first year in human history where carbon dioxide levels have reached the symbolic milestone for an entire year.

2016 Another Deadly Flood Year For the U.S.

By Chris Dolce
October 24, 2016

Flooding has contributed to 300 deaths in the U.S. since January 2015.

As Winter Approaches, Wild Montana Mustangs Depend on Snowpack For Survival

By John Hopewell
October 24, 2016

Residing mostly in Montana, the Pryor Mountain Mustangs have chosen an extremely harsh environment to live in where the weather can determine their survival.

First Snow Falls in the Northeast After Record Warm Temperatures

October 23, 2016

Areas in the Northeast are seeing their first snow.

Three Things To Know About the Weather This Week

By Chris Dolce
October 23, 2016

Here are some of the weather stories we are tracking this week.

Parts of Northeast Are Getting Its Biggest Soaking in Months, But Is it Too Much of a Good Thing?

By Brian Donegan
October 22, 2016

A soaking rain is impacting the Northeast, but could it be too much too quickly?

Higher-Elevation Snow Ahead in the Northeast After Record-Warm Temperatures

By Linda Lam
October 22, 2016

Portions of the Northeast started the week feeling like summer, but this weekend snow is in the forecast.

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Featured Blogs

Sea Ice Extent Is Near Record Lows--South as Well as North

By Dr. Jeff Masters
October 26, 2016

Sea ice is at a record-low extent for late October in the Arctic and close to a record low in the Antarctic. The latter is a big change from unusually high extents in recent years. The global total of sea ice (Arctic plus Antarctic] is more than 1 million square kilometers below the previous record for late October.

An Investigation of Death Valley’s 134°F World Temperature Record

By Christopher C. Burt
October 24, 2016

In 2012 the WMO (World Meteorological Organization) disallowed what had long been considered the hottest air temperature ever measured on Earth: a 58.0°C (136.4°F) reading measured at El Azizia, Libya on September 13, 1922. As a result of this record being struck from the books, the temperature of 134°F (56.7°C) recorded at Greenland Ranch at Furnace Creek in Death Valley, California on July 10, 1913 became, by default, the new world’s hottest air temperature yet measured. In this guest blog we will investigate the credibility of that measurement. This blog is courtesy of William T. Reid, a geographer and climatologist who has been studying the desert climate of California and, in particular, the Death Valley temperature record for some 30 years. Mr. Reid and I worked together to come to a commensurate conclusion regarding the validity of this significant planetary weather record: It is possible to demonstrate that a temperature of 134°F in Death Valley on July 10, 1913, was essentially not possible from a meteorological perspective, using an officially sanctioned USWB shelter and thermometer and following proper procedures observationally. Thus, the best explanation for the record high report(s) in July 1913 is observer error.

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.