June 30, 2011
The inadvertent cloud-seeding effect occurs up to about 6 percent of the time at major airports.
June 09, 2011
Prior to massive flooding early in 2011, long-term drought plagued the Australian state of Queensland . As part of a broad research program on cloud seeding, NCAR researchers have been steadily crunching data from a 2008–09 field project that looked into how to make the clouds drop more rain on the region.
classroom scene
June 03, 2011
A new study led by NCAR’s Wei Yu and CU-Boulder’s Weiqing Han looks at the effects of the Madden-Julian Oscillation (MJO), the largest source of intraseasonal (within one season) variability in the tropics, causing wet and dry periods to alternate.
Ocean waves.
May 06, 2011
The surfeit of snowfalls across the U.S. East Coast over the last two winters brought ample evidence of just how much the white stuff can vary from place to place—and how difficult it is to assess accurately.
UCAR Magazine
May 06, 2011
Rick Anthes, UCAR president, looks at atmospheric predictability in general and presents some remarkable examples of recent successful experimental predictions.
Cyclone Nargis in Bay of Bengal
May 06, 2011
Clark Evans from the University of Wisconsin examines Tropical Storm Erin, the rare cyclone that actually became stronger over Oklahoma than it did over water.
April 28, 2011
How could a tornado outbreak kill more than 200 people? Several factors—meteorological, geographical, and sociological—came together in a rare and deadly way.
UCAR Magazine
April 12, 2011
FIP-Severity provides 12-hour icing forecasts to pilots and forecasters on the likelihood of encountering dangerous in-flight icing conditions.
Map of upper Midwest with dark blue areas of potentially severe icing
March 10, 2011
Snowstorms have been a dime a dozen across much of the central and eastern United States over the last few months, but four of them got special scrutiny.
Grad students and Doppler on Wheels unit
March 08, 2011
The biggest upgrade to the U.S. weather-radar network in 15 years gets rolling this winter with a minimum of fanfare—debuting under the radar, as it were. But the new capabilities should get their fair share of attention in the long run.
Dual-polarization radars sending out signals
February 23, 2011
A case study from NCAR looks at how coastal residents assessed their risks and made decisions leading up to Hurricane Ike.
Debris on streets.
February 15, 2011
A new NCAR study compares two different methods for forecasting power production at wind farms: turbine-based versus farm-based.
Wind turbines at sunset.
February 10, 2011
A new study by NCAR scientists looks at the accuracy of snow gauges. Making accurate measurements of snowfall is critical for weather forecasting, climate studies, and hydrology. But a combination of snow gauge geometry and weather conditions can lead to systematic measurement errors.
A close-up image of a snowflake.
December 30, 2010
It's good to remind ourselves how far weather prediction has come in recent years. The ferocious winter storm that assailed the U.S. Atlantic coast in late December 2010 offers a great case in point.
A motorist near Central Park tries to enter his snowbound vehicle
December 02, 2010
Issuing a five-day weather forecast was once a daring enterprise. Today, we’re not only accustomed to long-range weather forecasts but also to seasonal-scale outlooks. Hurricanes and sea ice show how far we've come.
Hurricanes Igor and Julia, 15 September 2010
November 03, 2010
International collaboration has always been at the heart of COSMIC, a six-satellite network that intercepts GPS signals to measure weather, climate, and space weather variables. Now one of the leading university collaborators on COSMIC, the University of Graz, is UCAR’s latest international affiliate.
UCAR president Rick Anthes and representatives from University of Graz
November 02, 2010
Kevin Knupp at the University of Alabama investigates heat bursts, unusual pockets of very warm, dry air descending from thunderstorms.
Kevin Knupp
November 02, 2010
Julia Slingo from the U.K. Met Office foresees physicists and mathematicians engaging with many other disciplines to provide world-class weather and climate science and services.
Julia Slingo, UK Met Office
November 02, 2010
There was no gold medal, no podium ceremony, and definitely no tears from the losers on 30 July, but there was a new national champion. On that date, NOAA proclaimed that a South Dakota hailstone had surpassed all contenders in both size and weight.
Charles Knight with 2010 Vivian, SD, hailstone
November 02, 2010
UCAR president Rick Anthes says the good forecasts of Hurricane Earl were not unusual. The accuracy of hurricane track forecasts has increased steadily over the years.
Hurricane Earl
November 02, 2010
It’s not exactly a moment for celebration, but when a tropical storm is born in the Atlantic, millions of people learn about it quickly. As with any birth, though, a great deal has to happen in just the right way before a tropical storm is christened.
NASA’s DC-8 shuttled to St. Croix for a flight into the remnants of Gaston
October 26, 2010
A new computer simulation of a deadly, fast-spreading 2006 wildfire in California shows how far researchers have come in their quest to better understand fire dynamics.
UCAR Magazine
October 18, 2010
A team of NCAR scientists is studying how advanced satellite technology that measures lightning could help protect aircraft from turbulence caused by severe weather.
Lightning flashing from clouds down to the ground.
September 16, 2010
Can a distant hurricane play havoc with your GPS unit? Scientists aren’t sure of the answer, but they suspect that hurricanes affect more than land and water.
model simulation of wind and density in outer atmosphere
September 08, 2010
On December 20, 2008, a Boeing 737 with Continental Airlines encountered a crosswind gust during takeoff at Denver International Airport, causing it to veer off the runway. Simulations done at NCAR indicate that a mountain lee wave amplified over DIA within minutes of the accident.
Lenticular clouds at sunset over the Front Range.

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