January 08, 2010
No matter how you slice it, the last few weeks have been consistently wintry across large chunks of North America and Eurasia.
AO index for September 2009-January 2010
November 06, 2009
How do people and organizations respond to extreme weather events—in particular, flash floods? Flash floods are already on average the leading cause of weather-related fatalities in the United States and second most common worldwide.
Flooded highway.
November 01, 2009
Dione Lee Rossiter, University of California, Santa Cruz • This Ph.D. student studies clouds, especially over the subtropical ocean—the area just north and south of the tropics. She's interested in their invisible physical changes, or microphysics, and a whole lot more.
Dione Lee Rossiter
September 11, 2009
This spring the second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2, or V2) captured one tornado in unprecedented detail, as well as a number of potentially tornadic thunderstorms that never made the grade.
A W-band radar capturing the end stages of the 5 June tornado
September 11, 2009
Eleven days can go by in no time, but their brevity was accentuated for 27 graduate students at a summer colloquium on 1–12 June. The goal was to give students a taste of fieldwork by having them organize and conduct mini–field experiments and draw meaningful results from the data.
Students catch a glimpse of the University of Wyoming King Air in flight
August 27, 2009
A team of NCAR researchers led by Jacob Fugal is developing and testing a specialized instrument that uses digital holography to measure tiny cloud droplets.
HOLODEC 2 installed on Gulfstream V aircraft.
May 07, 2009
Using a highly efficient modeling technique, Pablo Ortiz (University of Granada) and Piotr Smolarkiewicz (ESSL/MMM) have simulated the role of winds in forming sand dunes and sandholes.
Sand dunes in the Atacama Desert
May 04, 2009
The largest and most ambitious tornado study in history will begin next week, as dozens of scientists deploy radars and other ground-based instruments across the Great Plains to gain a better understanding of these often deadly weather events.
still from animation of tornado visualization
April 06, 2009
The 2008 Super Tuesday tornado outbreak swept through several southern states and the lower Ohio Valley, killing 57 people. NCAR scientist Julie Demuth helped the National Weather Service assess the societal impacts of the deadly storms.
The funnel cloud of a tornado
March 18, 2009
NCAR scientists are exploring the use of a novel statistical technique to help steer intercontinental flights away from thunderstorms.
Test of one-hour prediction skill for locations of showers and thunderstorms
February 17, 2009
NCAR scientist Fei Chen is collaborating with colleagues at China’s Institute of Urban Meteorology to explore how growth in Beijing is changing the city’s summer rainfall patterns, focusing specifically on the relationship between urban expansion, aerosols, and summer rainfall.
Sunset over Beijing, China
February 04, 2009
The highly detailed forecasts will help the utility use power from turbines when sufficient winds are predicted.
color plot of wind strength
January 23, 2009
While there has been much attention focused on the question of whether climate change influences hurricanes, scientists are also interested in whether the reverse holds true: do hurricanes significantly impact global climate?
Building damaged by a hurricane
December 15, 2008
Accurate, high-resolution weather forecasts are a critical part of wind energy production. In December, UCAR signed an agreement with Xcel Energy to develop a wind prediction system for the company’s wind energy farms in Colorado, Minnesota, and Texas.
Tall modern wind turbines in green field.
December 10, 2008
Several red-eye commercial flights were rocked by moderate to severe turbulence as they flew across northeast Kansas early on June 17, 2005. A new study by NCAR scientists Stan Trier and Bob Sharman uses modeling to connect storms in Oklahoma with the Kansas turbulence.
Flight paths across Kansas
December 04, 2008
A new UCAR COMET Program course, Weather and Health, will help meteorologists and others broaden their understanding of the impacts of weather and climate on public health.
Winter weather scene.
October 08, 2008
NCAR, working with federal agencies and universities as well as the insurance and energy industries, has launched an intensive study to examine how global warming will influence hurricanes in the next few decades.
Color map of North America, Atlantic, and parts of Europe and Africa
October 01, 2008
Andrea Sealy, NCAR's Advanced Study Program • If you are from the Caribbean and you're good at math and science, the advice you get is to become a doctor, says Sealy. "But I never liked biology much," she adds. Now she's a researcher at the Caribbean Institute for Meteorology and Hydrology.
Photograph of Andrea Sealy
September 24, 2008
Mountain pine beetles appear to be doing more than killing large swaths of forests in the Rocky Mountains. Scientists suspect they are also altering local weather patterns and air quality.
Photograph of Alex Guenther looking at an instrument attached to a pine tree
September 09, 2008
This year is proving unusually active for Atlantic storms. The hurricane season is only at its midpoint, but already there have been 10 named storms—which is the average number for an entire year.
August 12, 2008
Dramatic year-to-year temperature swings and a century-long warming trend across West Antarctica are linked to conditions in the tropical Pacific Ocean, according to a new analysis of ice cores conducted by scientists at NCAR and the University of Washington (UW).
August 01, 2008
James Done, NCAR's Mesoscale and Microscale Meteorology Division • A meteorologist, Done examines weather forecasts generated by computer models to better understand severe weather and long-term climate change. Recently, that has meant homing in on tropical meteorology and hurricanes.
James Done
July 22, 2008
People living near vulnerable creeks and rivers along the Front Range may soon get advance notice of potentially deadly flash floods, thanks to a new forecasting system being tested this summer by NCAR.
Photograph of people standing at washed-out road after flood
July 08, 2008
In an attempt to create a favorable environment for this summer's Olympic Games in Beijing, Chinese officials hope to influence local weather conditions and air quality.
Photograph of a sunset over a city and highways
June 19, 2008
The first comprehensive analysis of observed and projected changes in weather and climate extremes in North America and U.S. territories was released today.
Jerry Meehl

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