Thursday, July 10, 2014

Weather Craziness?

Paul Douglas is a nationally respected meteorologist with 33 years of television and radio experience. A serial entrepreneur, Douglas is Senior Meteorologist for WeatherNation TV, a new, national 24/7 weather channel with studios in Denver and Minneapolis. Founder of Media Logic Group, Douglas and a team of meteorologists provide weather services for media at Broadcast Weather, and high-tech alerting and briefing services for companies via Alerts Broadcaster. His speaking engagements take him around the Midwest with a message of continuous experimentation and reinvention, no matter what business you’re in. He is the public face of “SAVE”, Suicide Awareness, Voices of Education, based in Bloomington. | Send Paul a question.

Summer On Hold Next Week - Coolest MLB All-Star Game on Record?

Posted by: Paul Douglas Updated: July 9, 2014 - 11:27 PM
"July-tober"
Not much surprises me anymore. Numbing cold followed by record rains as weather patterns slow and our climate becomes more volatile? A 4th of July blizzard would have gotten my attention.
Welcome to the "new normal".
Even so next week's weather map made me do a double-take. During what is typically the hottest week of the year a hunk of October-like air will hurtle south. Minnesotans will be wandering around in light jackets & sweatshirts on Monday and early Tuesday, mourning the (temporary) death of summer.
1816 was "A Year Without a Summer", due to low solar activity and volcanic eruptions. Heavy snows were reported into June; ice "thick enough to support the full weight of a duck" into July over New England.
This summer? Not quite that extreme, but the jet stream is still misbehaving and I suspect it's related to rapid warming of the Arctic. We'll see.
A comfortable Thursday gives way to a few T-storms Friday, the wettest day in sight. Soak up 80s Saturday because an autumn-like cool front arrives late Sunday. By Monday "highs" may hold in the 50s north, 60s south with a discernible whiff of crisp mid-summer wind chill.
Just when you thought things couldn't get any stranger around here.

* Monday 1 PM temperature anomalies across the USA courtes of Weather Bell. Temperatures may be 26 F. cooler than average across much of Minnesota; as much as 30-34 F. warmer than normal across western Canada. More crazy extremes.

.28" rain predicted for MSP tonight and early Friday. Source: NOAA NAM model

Reinforcing Tired Stereotypes. "Oh, you're from Minnesota. It's really cold up there, huh?" Raise your hand if you've ever heard that before. Plan on hearing more of it after Tuesday's MLB All-Star game, which may wind up being the coolest on record, with gametime temperatures in the 60s under a mostly clear sky. Light jacket or sweatshirt weather. But not as chilly as Monday, when 10-20 mph winds, coupled with ragged clouds and PM showers will make you SWEAR it's October. Something to look forward to. A meager warm front sparks a few showers and T-showers tonight into Friday morning. Summer takes a siesta next week.

Risk of a Smoky Sunset. Visible satellite imagery Wednesday showed a plume of smoke sweeping across the Dakotas, from wildfires blazing over Canada's Northwest Territories. Some of that smoke may reach Minnesota in the coming days, giving the sky a milky, hazy cast - possibly sparking an extra-red sunrise or sunset. Image: Des Moines office of the National Weather Service and Twitter.

Tornado Alley Migration? Traditional Tornado Alley runs from Texas to Iowa, but in recent years NOAA SPC has issued the most Tornado Watches for southern Alabama and Mississippi, the same area that has the highest tornado concentration and death toll. Not quite what I was expecting, and it's the topic of today's first Climate Matters segment.

Steps To Reduce The Risk of Tornado Damage in Commercial Structures. Here's an excerpt of an interesting story at DisasterSafety.org that caught my eye: "...The strongest category of tornadoes can generate maximum wind speeds of greater than 250 mph, which is enough to destroy most buildings and structures in their path. These maximum wind speeds generate forces that are about twice as large as those generated by the strongest hurricanes. Only a few specialty buildings are designed to withstand the direct impact of a severe tornado. However, well engineered, large and tall commercial structures are not likely to suffer structural collapse. For smaller commercial structures, good construction choices can give added protection and increase the likelihood that at least part of the structure will remain standing to provide shelter. Buildings that have been strengthened in critical areas and particularly at connection points, such as between the roof and walls and walls and foundation, would have a good chance of surviving intact or with minor cosmetic damage if subjected to the outer edges of a tornado..."

Severe Storm Capital of the USA Since 2003: Asheville, North Carolina? I know, I did a double-take too, and 10 years may not be a long enough time to derive any meaningful statistical trends, but the Asheville area receives nearly 40 days/year, on average, with a tornado, severe wind storm or large hail within 25 miles of the city, according to NOAA SPC. That compares with 25 in Atlanta, 21 in Dallas and Denver, 10 in Chicago and roughly 16 in the Twin Cities. L.A. sees an average of 4 severe weather days, with only 1 in the Bay Area and San Diego. Sign me up. Source: NOAA SPC.

Severe Thunderstorm Winds Days Per Year Since 2003. The same trends are evident with thunderstorm generated straight-line winds, with a peak frequence over the western Carolinas and the Tennessee Valley. On average the Twin Cities have picked up an average of 8-9 severe wind days/year since 2003.

Want To Avoid Hail? Move North. Cool breezes off Lake Superior inhibit the largest, hail-producing thunderstorms much of the summer season: 1-3 large hail days a year for Duluth, on average, but less than 1 for much of the North Shore and Minnesota Arrowhead. That compares with 3-6 large hail days for Minneapolis - St. Paul, and over 8 hail days/year for Kansas City and the Denver area.

The Severe Weather Capital of the USA Since 2003 is....North Carolina? When, exactly, did that happen? The data set isn't very long (since 2003), but looking at tornadoes, large hail and damaging winds Asheville, North Carolina sees more than 3 times more "severe weather days" during an average year than Dallas or Wichita. That's the subject of a second Climate Matters segment: "40 days a year of severe weather makes..... Asheville, NC the severe weather capital of the United States? It's true. The Carolinas see almost 40 days a year with hail and wind gusts over 50 mph. That's a bit of a head scratcher."

Be Prepared! What To Do Before, During, And After a Hurricane. RedOrbit has a timely article with some useful information and links; here's an excerpt: "From June 1 to November 30 of each year, the Atlantic hurricane season flexes its muscles. In an effort to help keep people alive and safe, the Centers for Disease Control and Prevention (CDC) keeps a Hurricane Preparedness website that is full of great information to help with hurricane health and safety. The CDC provides important tips to help before, during, and after a hurricane. Before: The first tip is to prepare for a hurricane. If you live in a place that could be hit, it is best to prepare now rather than wait for a hurricane to be imminent. Before a hurricane, the CDC identifies two steps: make a plan and get supplies. In making a plan, the CDC gives these readiness suggestions..." (Hurricane Irene file photo: NASA).

Why New Orleans' Katrina Evacuation Debacle Will Never Happen Again. Next City has an interesting story focused on what New Orleans officials learned in the wake of Superstorm Sandy; how they are much better prepared for the next, inevitable hurricane. Here's an excerpt: "In New Orleans, evacuation requires decisions that must be made early before traffic builds, motels fill up, roads flood, or winds reach dangerous levels. In 2005, when Katrina loomed in the Gulf, most New Orleanians did leave town, but roughly 100,000 were left behind. Many lacked a car or money for transportation, or had special needs that made evacuation impossible. Others were stranded because they practiced “vertical evacuation,” staying with family that lived on higher ground or renting hotel rooms in buildings that had proven safe in the past. “We will never do that again,” said Lt. Col. Jerry Sneed, the city’s deputy mayor of Public Safety and Homeland Security..."


What's The Difference Between a Hurricane, Cyclone and Typhoon? Of course they are one in the same, but some of the classifications are slightly different, as explained at wsav.com; here's a clip: "...To be classified as a hurricane… typhoon or cyclone… a storm must reach wind speeds of at least 74 miles per hour. If a hurricane's winds reach speeds of 111 miles per hour… it is then upgraded to a major hurricane. If a typhoon hits 150 miles per hour then it becomes a super typhoon..."

end quote from:
http://www.startribune.com/blogs/266535861.html

No comments: