WeatherNation Blog

Plowable Snow for Oklahoma; More on Hattiesburg, MS EF-4 Tornado – Are warmer sea surface temperatures spinning up more severe coastal storms?

Tornadoes or Drought?

People are asking about 2013. “What’s the long range outlook Paul?” Um. Changeable. “Can you be a little more vague?” Here’s what I’ve noticed in recent years: either a rash of tornadoes (like in 2010) OR a bias toward drought. It’s usually one or the other.

Pick your poison.

NOAA predicts some improvement in Minnesota’s drought by late April, and I think/hope they’re right. I see subtle signs the pattern may be shifting. I guess, all other things being equal, I’d rather point to rotating red blobs on Doppler. At least a busy tornado season implies enough moisture for farmers and our lakes. And a drought would impact everyone.

The storm that dumped 18″ on Audubon, Minnesota (2-4″ of slush in the metro) is long gone. No commute-snarling storms are brewing; just a Thursday coating out ahead of the next cold surge for late week. Highs hold in the teens by Saturday, but no subzero lows are on tap looking out 2 weeks, at least not in the immediate metro area.

Hey, that’s progress!

I’m a naive optimist, but I really do believe the coldest days of winter are behind us now.

Last year we saw 70s by mid-March. Don’t hold your breath this year. A potentially good omen for our drought?

Two Cold Days – Nothing Arctic In Sight. Models show highs near 30 today, possibly low to mid 30s Wednesday before cooling off late in the week. Expect daytime highs in the teens by Friday and Saturday, before thawing to near 32 F. by Monday. Graph: Iowa State.

Ski Oklahoma. Looking for fresh powder this week? Head to the Panhandle of Texas or northern Oklahoma, where some 6-10″ amounts are possible by Friday morning. A weak storm may drop 2-4″ slushy snow from Baltimore to Wilmington, Philadelpha and the Boston area. Just what they need – more snow. NAM model guidance above courtesy of Weathercaster.

What A Difference A Year Makes. Check out the difference in snowcover from February 11, 2013 and February 11, 2012. Night and day. Details from NOAA NOHRSC: “A comparison between the current snow depths across the northeast US compared to the same time last year. Data is from the NWS National Operational Hydrologic Remote Sensing Center (NOHRSC) in Chanhassen, MN.”

Dual Polarization Doppler Radar And The Hattiesburg EF-4 Tornado. More details on how the new Doppler (which scans about the vertical as well as the horizontal axis) from the Jackson, MS office of the National Weather Service: “As the tornado moved into West Hattiesburg yesterday evening, we were receiving multiple ground truth reports confirming the tornado. However, thanks to recent dual-pol upgrades at area Doppler radar sites, we could also confirm the presence of tornadic debris. Here is a screen capture from the Mobile, AL radar at 5:13 pm as the tornado was moving through the West Hattiesburg/Oak Grove area. The more traditional radar products shown at the top (base reflectivity, storm relative velocity) were showing a severe thunderstorm, with strong and tight rotation at just over 7,000 feet above the ground. It was the dual-pol products on the bottom of this image that provided additional confirmation that this rotation must have been extending to the ground. The correlation coefficient (CC) product in the bottom-right helps to provide an idea of the consistency of the shape of the targets being reflected back to the radar. Higher values shows greater consistency (for instance, all rain), while lower values show less consistency (a mixture of targets). In this image we see an area of lower CC, which is actually an indication of tornadic debris of various shapes and sizes. In addition, the differential reflectivity product indicated values close to 0, which would also be expected with tornadic debris. Dual-pol continues to prove to be a powerful tool in our arsenal of technology enabling us to track severe weather.

* the Hattiesburg EF-4 (with winds estimated as high as 170 mph) was on the ground for 20 miles, leaving behind a trail of damage, 82 injuries, but (miraculously) no fatalaties. The wedge tornado was clearly visible, striking after 5 pm local time, moving east at close to 50 mph. Had it been a month or two earlier twilight would have made the tornado difficult, even impossible to see, which could have resulted in a significant death toll. Details here.

What Would Your City Look Like With Beijing’s Air? A “Smog Simulator”. Be glad you’re not stuck in Bejing, where the air has been unbreathable in recent weeks – locals warned to stay indoors. That’s what happens when a country doesn’t have the equivalent of the EPA. Growth comes first – who cares about the environment and public health? Marketplace reports: ”A cloud of pollution three times the size of California blanketed China last month that was so dangerous residents were warned to stay indoors and avoid outdoor activities. Many locals reported visibility so poor that buildings down the street were obscured. Images of Beijing covered with murky brown air were a startling reminder of how rising pollution from factories and automobiles can spoil the air in that industrializing nation….”

I’m Bill Gates. I have a lot of respect for Microsoft founder Bill Gates, now co-chair of the Bill and Melinda Gates Foundation. Yesterday he gave a spirited (virtual) interview on the popular site Reddit. Check out the questions and answers – some of the comments are priceless too.

A Link Between More Powerful Storms and Warmer Sea Surface Temperatures? Here’s the latest installment of “Climate Matters”, a 2:30 YouTube clip prepared for WeatherNation TV: “WeatherNation Chief Meteorologist Paul Douglas examines the link between abnormally warm sea-surface temperatures and powerful storms. Topics include the recent southern tornadoes, the blizzard , and Superstorm Sandy.”

Winter Boots – With Spikes? My footwear helps me navigate glaze ice – and it’s a weapon too! Details from gizmag.com; here’s an excerpt: ”German footwear manufacturer Meindl recently added an innovative solution for winter traction to its line. The metal spikes in the Tecvision Spike System provide traction during the slipperiest winter conditions and quickly retract back into the rubber sole when they’re not needed. You can tackle all winter conditions with one pair of boots…”

Uh Oh. This is a troubling photo, on so many counts. Where did he get a “Big Boy” float? Photo courtesy of theCHIVE.

“Fire And Ice”. Thanks to photographer Steve Burns, a gifted photographer (and MBA student at the University of Minnesota). He writes: “I did a photography workshop with Grand Marais photographer Bryan Hansel this weekend. Here is my favorite shot of the trip which was from sunrise on Saturday morning.  Amazing display of fire and ice!

Climate Stories…

 

Celebrating and Preserving Winter. The American Birkebeiner Ski Marathon is coming up; it’s America’s largest ski event with 10,000 skiers, 5 separate races – it sold out back in October, 2012. As part of this event, author Bill McKibben, global climate solutions leader at 350.org (and avid cross country enthusiast) will be attending a a series of presentations on climate change and the future of Minnesota’s (increasingly fickle) winters. I’ll be giving a presentation on severe weather trends – very much looking forward to hearing Bill’s presentation at St. Thomas on Feb. 20.

When: St. Thomas, February 20. Macalester College on February 21, and in Hayward, WI on February 21. The theme: “What I Love About Winter Weather”.

Why: “To build an unstoppable movement toward climate stability and a smart, sustainable future for generations to come.”

Details: at www.coolplanetmn.org

Get Involved: organizers are looking for investors, contributors, skiers and people interested in climate change to attend SPEAK UP!! (a climate leadership training program on Sunday, March 10; details to follow).

Security Risks of Climate Change And Extreme Weather. Here’s an excerpt from ScienceDaily: “Increasingly frequent extreme weather events such as droughts, floods, severe storms, and heat waves have focused the attention of climate scientists on the connections between greenhouse warming and extreme weather. Because of the potential threat to U.S. national security, a new study was conducted to explore the forces driving extreme weather events and their impacts over the next decade, specifically with regard to their implications for national security planning. The report finds that the early ramifications of climate extremes resulting from climate change are already upon us and will continue to be felt over the next decade, directly impacting U.S. national security interests…”

Image credit above: “Hurricane Katrina. Predicted changes in extremes include more record high temperatures; fewer but stronger tropical cyclones; wider areas of drought and increases in precipitation; increased climate variability; Arctic warming and attendant impacts; and continued sea level rise as greenhouse warming continues and even accelerates.” (Credit: NOAA)

 

Harvard Study. Here is a link to the PDF of the new research referenced above. A long but worthy read.

The Earth’s Climate Doesn’t Care What Political Party You Are A Member Of. Here’s an important video, courtesy of Greg Laden’s scienceblogs.com: “Climate scientist Anthony Leiserowitz drops some serious knowledge on “Moyers & Company”. In two bullet points, he describes exactly what Obama needs to say about global warming and what we can do to stop climate change. Let’s hope Obama watches Bill Moyers videos.”

Canadian Doctors Urged To Fight Climate Change. Climate Central has the story; here’s an excerpt: “Scientists began talking seriously about some dangers of climate change more than 30 years ago — rising seas, changing weather patterns, more rain in rainy places and more drought in dry places, and more. But the risks that lie outside their areas of expertise have taken longer to draw attention — especially in the area of human health. That has started to change, however, as medical professionals have begun to understand how a changing climate could lead to all sorts public health problems — increased mortality as heat waves become more intense and more common; a rising incidence of allergies; the spread of infectious diseases into new areas; and more. The latest evidence of this growing awareness: an editorial in the Canadian Medical Association Journal that lays out the facts and urges doctors to become more vocal in demanding action against climate change…”

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