70% of Nebraska now in exceptional drought, the most extreme designation. Source: NOAA.
109 F. heat index yesterday at Searcy, Arkansas.
“Isaac’s rains were like Chapter 1 in the drought relief book,” said David Miskus, a meteorologist with the National Oceanic and Atmospheric Administration’s climate prediction center. “We still need a lot more rain to go here to really eliminate this drought.” – excerpt from a New York Times article on the drought below.
“…While some parts of the nation were dealing with drought and fire, others were beingpummeled by storms. A freak wind system known as a derecho left 23 dead and 1.4 million people without power from Illinois to Virginia. Another potent storm dumped up to 10 inches of rain in Minnesota and in Wisconsin, flooding homes, breaking records, and prompting a polar bear to escape from a swamped Lake Superior Zoo. All these storms, heat waves, droughts, and fires are not one-off events, but a pattern of increasingly extreme weather that is exactly what global warming models have predicted.” – excerpt from a story at The Energy Collective; details below. Photo above: NOAA.
“...In providing an overview of the climatological situation, AMS noted that all all of the 10 warmest years in the global temperature records through 2011 occurred since 1997. For the U.S. as a whole, there have been twice as many record daily high temperatures as record daily low temperatures recorded in the first decade of the 21st century.“ - from an article on the new, revised AMS (American Meteorological Society) position on climate change; details below.
“…Cherry pickers ignore the fact that our planet is currently building up heat at the stunning rate of around 3 Hiroshima bombs per second. Instead, they focus on short periods of the surface temperature record. This record bounces up and down from year to year as the ocean exchanges heat with the atmosphere, meaning that it’s possible to find any short period during a long-term warming trend where temperatures fall briefly.” – excerpt from The Conversation below.
KSMQ Station Operating Again. This is what the severe storms rumbling across far southern Minnesota earlier this week did – straight line winds possibly in excess of 70 mph. at times. The Austin Daily Herald has an update; here’s an excerpt: “Austin KSMQ TV employees had a hectic day Wednesday after a storm toppled the station’s broadcast tower early that morning; however, the station is now back on the air. While the tower itself still lies in shambles, the station was able to get back up and running at 7:58 p.m. thanks to the help of other local broadcast stations. “We had great cooperation with local broadcasters,” Eric Olson, KSMQ president and CEO, said Wednesday afternoon before the station was again operational. The fiasco was like a mini TV reunion for Olson and other local TV executives, many who have not seen each other in years. Initially, Olson and others thought it could be two weeks before KSMQ would be operational, so much of the day was spent collaborating with other stations on a solution.”
Photo credit above: ”A portion of a 440-foot transmitter tower lies draped over a small building near the Riverland Community College west building Wednesday morning. The tower came down during the severe storms that swept through Wednesday between midnight and 1 a.m.” Eric Johnsonfirstname.lastname@example.org
Aurora Forecast. Here’s a good link to gauge the probability of being able to view the aurora on any given night, the latest forecasts from the Geophysical Institute at The University of Alaska, Fairbanks.
* more great aurora links here.
Waiting For Leslie. Here is the latest radar loop from the Bermuda Weather Service. The island may endure Category 2 (95-110 mph) winds by the weekend as Hurricane Leslie’s eye passes very close to Bermuda.
GFS Solution. The GFS solution is slower (and deeper/stronger), showing a Category 2-3 hurricane 300 miles south of St. John’s, Newfoundland next Wednesday. Other solutions move the hurricane faster, bringing “Leslie” ashore as early as Tuesday as a Category 1 storm.
Warm Bias Thru Third Week of September. In spite of a few blips of cooler air (including cool 60-degree highs for much of Minnesota today) the trend will be…the same as it’s been for the last 15 months across the Upper Midwest: warmer than normal. The 8-14 day temperature outlook from NOAA CPC shows a warm bias across most of America. Map: NOAA and Ham Weather.
Graphic above: Drought’s Footprint. ”More than half of the country was under moderate to extreme drought in June, the largest area of the contiguous United States affected by such dryness in nearly 60 years. Nearly 1,300 counties across 29 states have been declared federal disaster areas. Areas under moderate to extreme drought in June of each year are shown in orange (above)” Source: New York Times.
Flash Flood. Jennifer Shutte snapped this photo of street flooding in Salisbury, Maryland Thursday afternoon, the result of slow-moving T-storms dumping out some 1-2″ rains in a short period of time. Details from WBOC-TV.
Moisture Imbalance. The 5-Day rainfall outlook (NOAA HPC) shows some 1-3″ amounts from Indianapolis and Toledo to Detroit, another soggy bulls-eye near Tampa. Monsoon T-storms flare up over the desert southwest.
Hurricane Isaac 3-D Satellite Images Show Extent Of Flood Damage. I thought this was fascinating – a story from Huffington Post and Our Amazing Planet; here’s an excerpt: “Hurricane Isaac sent sheets of rain from the sky and ocean waters surging ashore, inundating large regions of the Gulf Coast with devastating floods last week. Teams of scientists are already on the ground, using advanced laser-imaging technology to capture the storm’s effects in 3D. Teams with the U.S. Geological Survey are using lidar (short for light detection and ranging) to help make intricately detailed topographic maps of the floodwaters Isaac brought to the hardest hit population centers in Louisiana, Mississippi and Alabama. The scans capture not only the extent of the flooding, but also catalog damage to buildings, levees and other structures.”
Image credit above: “A lidar scan, taken from the ground, of New Orleans’ I-510 bridge taken on Aug. 31, 2012.” USGS.
Hurricane Season Dilemma: To Stay Or To Go. Many locals take a wait and see attidude, often relying on the category of the hurricane to decide on whether to evacuate inland or wait it out. “Category 1? No big deal – I’ll take my chances.” But Isaac was a Category 1, a “minimal hurricane” (oxymoron) that produced Category 3-like damage and flooding, especially in the parishes outside of New Orleans. Here’s an excerpt of an article at nola.com in New Orleans: ”It was seven years ago that my life changed forever, just as many of us who were affected by Hurricane Katrina. And it was deja vu last week when Hurricane Isaac decided to pay us a visit and prolong its stay, leaving many without power for days, and unfortunately, entire communities without homes. When my husband suggested that we evacuate, I originally thought that he was overestimating the severity of what was then Tropical Storm Isaac. As I watched the newly formed Hurricane Isaac destroy power lines and homes from the comfort of a family member’s home the next day, I soon realized we had made the right decision.”
Arctic Ice Melt “Like Adding 20 Years Of CO2 Emissions.” The BBC has the story (and video) – here’s a clip: “The loss of Arctic ice is massively compounding the effects of greenhouse gas emissions, ice scientist Professor Peter Wadhams has told BBC Newsnight. White ice reflects more sunlight than open water, acting like a parasol. Melting of white Arctic ice, currently at its lowest level in recent history, is causing more absorption. Prof Wadhams calculates this absorption of the sun’s rays is having an effect “the equivalent of about 20 years of additional CO2 being added by man“.
Summer From Hell: Climate Change Makes Its Presence Known. The Energy Collective has the story; here’s an excerpt: “The summer of 2012 has come to a close, but it won’t be forgotten anytime soon. It delivered one extreme weather event after another, from heat waves to freak storms, wildfires to drought. People lost their homes and livelihoods, yet even as they try to pick up the pieces, more powerful weather systems are looming on the horizon. Extreme weather is a hallmark of climate change. Scientists from the National Center for Atmospheric Research, the National Oceanic and Atmospheric Administration, and other leading groups confirm that climate change is contributing to the frequency and power of 2012’s weather events. Climate change creates stronger storms, including hurricanes like Isaac, and more potent heat and drought.”
Meteorologists Update Position On Climate Change. The story from feedstuffs.com; here’s a segment of the article: “Updating a 2007 position statement, the American Meteorological Society released an updated Statement on Climate Change Aug. 27. In addition to providing background and a brief overview on how and why the global climate has changed in recent decades, the statement names human activities as the main cause of atmospheric and oceanic warming. “There is unequivocal evidence that Earth’s lower atmosphere, ocean and land surface warming; sea level is rising; and snow cover, mountain glaciers, and Arctic sea ice are shrinking,” the statement concludes. “The dominant cause of the warming since the 1950s is human activities. This scientific finding is based on a large and persuasive body of research.”
Timeline (Infographic) Showing Extreme Weather, Climate Change Link So Far In 2012. Huffington Post has the story (and timeline): “As the Gulf Coast assesses damage from Hurricane Isaac, food prices take a hit from the Midwest drought and the West continues to battle wildfires, the World Resources Institute has compiled a timeline of some of the extreme weather and climate events that have hit the world so far in 2012.As WRI’s Kelly Levin notes, “While we have not performed analysis connecting any of these events to climate change, many of these occurrences are in line with what scientists have predicted in a warmer world. Plus, the science of attributing extreme events to human-induced warming has improved significantly.”
Democrats Mention Climate Change Once In Over 80 Speeches. Details from The Daily Caller: “CHARLOTTE, N.C. — Though the 2012 Democratic Party platform declares that the “national security threat from climate change is real, urgent, and severe,” it is apparently not urgent and severe enough to merit mention by speakers at the Democratic National Convention during the past two days. The Daily Caller reviewed the speech transcripts of the over 80 speakers who took the stage at the Time Warner Cable Arena here in Charlotte on Tuesday and Wednesday, and only one mentioned climate change — and even he only mentioned it in passing.”