Posted on May 29, 2015 by Bob Berwyn
Months of record-high temperatures are amplifying the impacts of California’s dry spell.
Sizzling temps kill snowpack, bake soil
FRISCO — The California drought is all the worse because of warmer temperatures, U.S. Geological Survey scientists said this week in a new study that reinforces previous findings.
The research focused on a one-year span, from Oct. 2013 to Sept. 2014, showing that, if the air temperatures had been cooler — similar to the 1916-2012 average — California’s critical winter snowpack would have been bigger, leading to more runoff and lower soil moisture deficits in the summer. Continue reading
Filed under: climate and weather, climate change, Drought, extreme weather, global warming | Tagged: California drought, climate change, extreme weather, global warming, Sierra Nevada snowpack | Leave a comment »
Posted on May 21, 2015 by Bob Berwyn
Extreme storms can happen outside expected times
FRISCO — A new study led by Colorado-based scientists seems to reinforce the old saying that, when it comes to the state’s weather, there’s no such thing as normal.
The research aimed to track seasonal and geographical patterns of extreme weather events, especially the monster storms that create headaches for emergency responders and resources managers. But pinpointing those trends is not easy the weather experts found. Continue reading
Filed under: climate and weather, Colorado, extreme weather, seasons, Summit County snow and weather | Tagged: climate change, Colorado, Colorado flooding, Colorado weather, extreme weather | 2 Comments »
Posted on May 20, 2015 by Bob Berwyn
A warming Arctic is changing the configuration of the jet stream, which affects mid-latitude weather. GRAPHIC COURTESY NOAA.
‘Too soon to tell …’
*More Summit Voice stories on this subject are here
FRISCO — There’s been lots of speculation and some early research on a possible link between soaring temperatures in the Arctic and extreme weather in North America and Europe, but the jury is still out, according to scientists with the National Oceanic and Atmospheric Administration.
NOAA’s James Overland was part of an international team that took a close look at possible connections and concluded that more research is needed.
“We are in the pre-consensus stage of a theory that there are links between the rapid warming of the Arctic and some severe weather events since 2007,” said Overland, lead author of the new study, “The melting Arctic and Mid-latitude weather patterns: Are they connected?” Continue reading
Filed under: Arctic, climate and weather, climate change, extreme weather, global warming | Tagged: Arctic amplification, climate change, extreme weather, global warming, Jet stream | 3 Comments »
Posted on May 20, 2015 by Bob Berwyn
Population growth in warm zones is a big part of the equation
FRISCO — Extreme heat kills more people than any other type of extreme weather, and that mortality could increase significantly in coming decades as the Earth warms under a blanket of heat-trapping greenhouse gases.
Americans’ exposure to extreme heat could increase four- to six-fold by 2050, a new study concludes, explaining that it’s not just the heat — the country’s population is growing especially fast in the hottest regions of the country. Continue reading
Filed under: climate and weather, Drought, extreme weather, global warming | Tagged: drought, extreme weather, global warming, heatwaves, public health | Leave a comment »
Posted on May 18, 2015 by Bob Berwyn
Forecasters nearly certain pattern will persist at least through the end of summer and probably to the end of the year
Warm sea surface temperatures along the equatorial Pacific show the shape of El Niño.
A classic El Niño sea surface temperature pattern is projected in this map from NOAA.
By Bob Berwyn
FRISCO — A developing Pacific El Niño is already affecting weather patterns across the western U.S. by bringing abundant spring moisture to the region, including late season snow and rain to parts of parched California.
And last week meteorologists with the National Oceanic and Atmospheric Administration said El Niño is likely to stick around for the summer and probably even through the end of the year, perhaps even gaining strength. More on the forecast in this NOAA El Niño blog.
Filed under: climate and weather, Colorado, El Niño, global warming, Summit County Colorado | Tagged: climate, El Nino, ENSO, extreme weather | 1 Comment »
Posted on May 2, 2015 by Bob Berwyn
The chance of extreme heatwaves is increased dramatically by human-caused global warming.
Greenhouse gas buildup raises chances of record-breaking warmth
FRISCO — There’s little doubt that global warming will lead to, well, warmer weather in most places.
But scientists in the UK said they were surprised at how clearly they could see the fingerprint of greenhouse gas emissions in a recent study that projects a big increase in the likelihood of record-breaking warm years. Continue reading
Filed under: climate and weather, climate change, extreme weather, global warming | Tagged: climate change, England, extreme weather, global warming, heat waves, UK | 2 Comments »
Posted on April 10, 2015 by Bob Berwyn
Record low streamflows expected in many areas this summer
Precipitation for the 2015 water year- to-date is now below normal over most of the West except for some northwestern areas. The dry March has significantly affected this picture since a month ago, when far more of the West was near normal.
FRISCO —Federal water watchers say their April 1 readings show that precipitation thus far in the 2015 water year (beginning October 1, 2014) is now below normal over most of the West except for some northwestern areas and coastal Alaska.
Snowpack has declined significantly since last month throughout the West due to the warm and dry March. Only high- elevation areas in the Rocky Mountains and Interior Alaska retain somewhat near normal snowpack.
Streamflow forecasts have dropped since last month due to a lack of snow accumulation during March and an early snowmelt, with most regions now expecting below normal streamflow. Reservoir storage is currently below normal in the Southwest and Nevada, with near to above normal storage elsewhere. Continue reading
Filed under: climate and weather, Drought, El Niño, extreme weather, global warming | Tagged: climate change, drought, extreme weather, global warming, streamflow forecast, Western United States | 1 Comment »