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PDS Tornado Watch Far Southeastern MN

Posted by: Paul Douglas Updated: June 12, 2013 - 2:46 PM

 

PDS Tornado Watch. SPC has issued a "Particularly Dangerous Situation" Tornado Watch, from southeastern Minnesota into southern Wisconsin, eastern Iowa and northwest Illinois until 9 pm this evening. An MCS or derecho may spin up with violent straight-line winds, a few supercell thunderstorms out ahead of the main squall line may spark 3" diameter hail and a few large, violent tornadoes. There's a high risk of severe weather in Chicago, for the first time since 2004, only the 16th "high risk" day for Chicago since 1980.

 

 

Over The Edge

 

"Paul, my parents came back from Arizona in April, thinking they were home free. Now they're threatening to never return north to the Land of 10,000 Weather Disappointments!" I'm hearing this a lot. People fed up by our 7-month winter, deflated by our cool, wet (late) spring and no-show summer. Will there be a few thousand additional snowbirds come December? Probably.

The reality: most of our winters since the late 90s have been pretty easy, but every now and then Mother Nature spanks us pretty hard.

A cool bias is keeping the most severe T-storms just to our south today; we'll get grazed by a few morning showers - skies brighten this afternoon, and Thursday will restore your faith in June. The next unstable swirl of cold air aloft sparks random T-storms late Friday into Sunday evening.

It won't rain all weekend, in fact most of the time should be dry with highs in the 70s. A string of 80s return next week. If this keeps up June will arrive..sometime in July.

Try to keep some perspective: Arizona is an oven. Florida's lovely, except for Texas-size storms with names. California's a relief, when the ground isn't shaking violently. 2013 has brought annoying weather. But it could always be worse.

 

5 Day Rainfall. Conditions are ripe for severe (training) thunderstorms - passing over the same counties of the Midwest and Ohio Valley into the Northeast by Thursday and Friday. Too much water east of the Mississippi, while wildfires grow in size and intensity from Colorado into New Mexico.

 

Weekend Preview. ECMWF model guidance (WSI) shows morning showers and T-storms Saturday giving way to partial clearing by midday and afternoon. A dry start Sunday may give way to a few instability T-showers by midday and afternoon Sunday. Trying to time weekend T-storms, 3-4 days in advance, is a fool's errand.

 

Trending Warmer - Slowly But Slowly. No heat spikes until the end of next week, when highs may surge into the 90s. Until then a southerly detour of the jet stream will keep highs in the 70s and 80s. ECMWF forecast highs above in Celsius.

 

Heat Spike Late Next Week? Denver saw 100 F. Tuesday, the earliest 100-degree high on record. Intense heat is likely from the Central Plains into the Rockies and Southwest for the next 1-2 weeks, ECMWF data hinting at 90s surging northward next week. The way this year is going I'm not holding my breath.

 

Storm Chasing From The Sky. Now this is how to storm chase - from an altitude of 40,000 feet. Within a few years NOAA may be sending jet aircraft into the vicinity of supercell thunderstorms capable of major tornadoes, similar to how they send 4 engine propeller "Hurricane Hunter" aircraft into tropical storms and hurricanes today. USA Today has the story; here's an excerpt: "...Early morning flights aboard the Gulfstream V jet have sampled the pre-storm atmosphere across several states in the Intermountain West and the Plains, cruising at 40,000 feet in altitude for up to six hours. The scientists have been looking for signs of bad weather that could be hiding far above the clouds. Specifically, the project is looking to better the weather forecasts that fall between two types of long-range alerts:

• Long term projections, known as convective outlooks, which show the risk of severe weather up to eight days in advance across large parts of the country; and...


• Tornado and severe thunderstorm watches, which are issued up to eight hours in advance for state-sized areas
..."

Photo credit above: "The Gulfstream V is readied to take off on a mission to study Tropical Storm Gaston in 2010. This is the same aircraft used in the MPEX project this spring." (Photo: NCAR).

 

Our Worst Fear: A Large, Urban Tornado. Downtowns have been struck in recent years, including Nashville, Salt Lake City and Miami. An EF-4 tornado hit La Plata, Maryland, tracking about 30 miles south of the White House in D.C. There's no reason why an EF-4 or EF-5 couldn't strike a major downtown or close-in suburb. We've been relatively lucky over the years. But as suburban sprawl continues, the statistical odds of injury-producing tornadoes increases too, and at least one structural engineer and meteorologist is forecasting a day of reckoning in our lifetime. Details in today's edition of Climate Matters. I've also included footage of the recent waterspout/tornado in Baltimore, and new, remarkable police dashcam-video of the developing EF-5 that hit Newcastle, then Moore, Oklahoma on May 20.

 

Deadly Oklahoma Tornado Upgraded To Widest On Record, Rare EF-5 Twister. Here's an excerpt from the AP and the Seattle Times article that resonated: "...Like many Midwestern cities, the Oklahoma City metropolitan area continues to expand in the suburbs, but the rapid growth hasn’t quite reached as far west as where Friday’s tornado tracked. William Hooke, a senior policy fellow of the American Meteorological Society, said the continued growth of cities in tornado-prone areas makes it only a matter of time before another monstrous twister hits a heavily populated area. “You dodged a bullet,” Hooke said. “You lay that path over Oklahoma City, and you have devastation of biblical proportions."

Photo credit above: Alonzo Adams / The Associated Press. "The National Weather Service has upgraded the deadly tornado that struck near Oklahoma City last week to a top-of-the-scale EF5 twister, which packed winds reaching 295 mph. The weather service also says the twister's 2.6-mile width is the widest ever recorded."

 

Enhanced Ohio Valley Tornado Risk Wednesday. All the ingredients are present for a few larger, more violent EF-2+ tornadoes Wednesday afternoon, from Chicago to Indianapolis, South Bend, Cincinnati, Dayton and Columbus. I expect SPC to issue Tornado Watches for portions of the red-shaded area by 2 or 3 pm tomorrow, with a 1 in 3 chance of a PDS (Particularly Dangerous Situation) Tornado Watch, implying a high risk of damaging tornadoes. We may also see an MCS or even a derecho capable of violent straight-line winds.

 

Black Forest Blaze Near Colorado Springs, Colorado. Record heat Tuesday (highs topping 100F) coupled with high winds and tinder-dry conditions have resulted in a significant blaze outside Colorado Springs. At least 6 homes have been consumed by flames, dozens more evacuated. Thousands of local Black Forest residents have been evacuated, as a precaution.

 

Tropical Storm Yagi. Yagi is a Tropical Storm, with sustained winds of 46 mph, gusts to 48 mph. The storm is pushing into cooler Pacific Ocean water and greater low-level wind shear, and it has shown weakening over the last 24 hours. It is not expected to achieve hurricane/cyclone status off the coast of Japan, but rather do a U-Turn and weaken to depression status. But the storm is tracking uncomfortably close to Tokyo - we'll continue to watch it carefully.

 

El Reno Tornado Had Rare Anticyclonic Companion. When tornadoes get that big all kinds of strange things can happen; LiveScience has the story - here's a clip: "As if the massive EF5 tornado that hit El Reno, Okla., last week weren't already noteworthy — it ranks as the widest tornado on record, at 2.6 miles (4.2 kilometers) across — it was also accompanied by a rare anticyclone twister that formed 3 miles (4.8 km) to the southeast, reports the Washington Post's Capital Weather Gang blog. Anticyclonic tornadoes are ones that spin clockwise instead of the usual counterclockwise (in the Northern Hemisphere, that is). These usually only form as waterspouts or twisters generated by non-supercell storms (those that don't have a rotating updraft), the Capital Weather Gang notes..."

Image credit above: "The path of the tornado that hit near El Reno, Okla., a suburb of Oklahoma City, on May 31, 2013. The tornado was judged by researchers to have been an EF5 at its peak and to have reached 2.6 miles wide at its peak (marked on the map)." Credit: NWS/NOAA.


 

Could Lightning Provide Earlier Tornado Warnings? Here is an avenue of research that holds tremendous potential to lengthen lead times for severe storms, including tornadoes. Scientific American has the story - here's a clip: "...On the day the devastating tornado hit Moore, Okla., Robert Marshall sat glued to the news, watching images of the deadly twister on CNN while he also monitored it on his computer. Marshall, the energetic CEO of Earth Networks, a company that owns and operates an enormous network of weather sensors, was looking for one thing in particular: lightning. But he didn't see it. "These tornadoes from a couple weeks ago were probably the most videotaped tornadoes in history. If you just watched the video, there's almost no lightning," Marshall said. Visible lightning, that is. In fact, as Marshall explained, there actually was lightning, a whole lot of it, in the storm that caused the Moore tornado. It's just that most of it didn't hit the ground and was thus unseen by humans..."

 

Storm Chasing Critical, Profitable, And Dangerous. Yes to all three. Here's a portion of a story from AP and The Grand Forks Herald: "...Professors at the University of Oklahoma's School of Meteorology strongly discourage their students from storm chasing and rarely bring them into the field for research unless it's part of a well-planned, coordinated project. "I can tell you that from a university perspective, we do not condone storm chasing at all. It's not something we teach in classes," said Melissa Bird, spokeswoman for OU's College of Atmospheric and Geographic Sciences. "It's dangerous, and students are not considered weather experts." In the end, meteorologists, like Armstrong, believe storm trackers play an important role in keeping the public safe. "There are aspects of it where storm chasers and storm trackers are always going to play a vital role in the warning process," Armstrong said. "But it is inherently dangerous to be around these storms..."

 

EF5 Tornadoes Since 1950. NOAA SPC has an online graphic showing the location (and year) of every F5 and EF5 since 1950.

 

How Swarming Drones Can Explore a Hurricane. It just dawned on me - I need a drone. Not sure why, I just know I need one. Here's a clip from an eye-opening story at Smithsonian.com: "...Kamran Mohseni thinks there may be a better way to gather storm data. It’s about thinking small. Mohseni, an engineering professor at the University of Florida, believes the next generation of hurricane hunters will be drones small enough to almost fit into the palm of your hand, but able to engage fierce hurricanes by riding the wind rather than trying to punch through it. Its weight–about as much as an iPod Nano–is an asset in his mind. “Our vehicles don’t fight the hurricane,” he says. “We use the hurricane to take us places.” His take is that instead of relying on a few “super-duper” aircraft, why not use hundreds of little drones that through their sheer numbers, could make the data that much more accurate or, as he put it, “You get super duper on an aggregate level.” Mohseni’s drones, with their sensors, would be launched with commands from a laptop, and then, with the help of mathematical models that predict where the best wind currents can be found, would be able to hitch a ride into the storm..."

Photo credit above: "Can this little thing really ride hurricane winds?" Photo courtesy of the University of Florida.


 

Stalled Take-Off For NOAA Satellite Plan? Politico has the story; here's an excerpt: "To save weather jobs on the ground, the Obama administration would take money from weather satellites in the sky. That’s the bottom line to a proposal by the National Oceanic and Atmospheric Administration (NOAA) that would drain the last 2013 funds for a promising U.S.-Taiwan COSMIC-2 satellite program in order to prevent furloughs of NOAA’s Weather Service personnel this summer...The beauty of this program is it generates an extraordinary amount of useful data and we don’t have to pay the whole freight,” said Clifford Mass, a professor of atmospheric sciences at the University of Washington. “It is an extraordinary mistake to take away the money,” he told POLITICO. “This will be really controversial in the discipline.” The COSMIC system’s design rests on a technique known as radio occultation, which measures changes in radio signals as they pass through the atmosphere. By measuring the bending of signals from GPS satellites, it is possible to collect thousands of temperature and humidity soundings that can very useful in improving weather forecasting..."

 

Europe Is Under Water. The Chive has an amazing collection of photos from recent (historic) flooding across Europe, in some cases the worst since the early 1500s: "These images show how the recent heavy torrential rainfall has resulted in dangerous flooding across Germany, Austria, Switzerland, Slovakia, Poland and the Czech Republic."

 

Flood Survival: What You Need To Know. I have a feeling it's going to be a long, tough summer with plenty of flash flooding from training thunderstorms. Here's an excerpt of a timely story at Outdoor Life Survival: "...Some floods develop slowly over a period of days from heavy rains and hurricanes. Flash floods can develop quickly, sometimes in just a few minutes and without any visible signs of rain. Tidal flooding can also happen with or without rain in your area. Be aware of flood hazards no matter where you live, but especially if you live in low-lying areas, near rivers and bays, or downstream from a dam. Keeping an ear to the radio or local TV stations is a great way to stay informed. In low-lying or flood prone areas, a NOAA weather radio with an alarm can be a life-saving investment.  

FEMA and the National Weather Service use the following terms to announce flood information:

- Flood Watch: Flooding is possible. Tune in to NOAA Weather Radio, commercial radio, or local television for updated information.

- Flash Flood Watch: Flash flooding is possible. Be prepared to move to higher ground. Listen to NOAA Weather Radio, commercial radio, or television for information..."

Photo credit above: NOAA.

 

A Surreal Sight. Check out this story and collection of flood-related photos from Europe, courtesy of Business Insider and Reuters: "A garden with a swimming pool is inundated by the waters of the Elbe river during floods near Magdeburg in the federal state of Saxony Anhalt, June 10, 2013. Tens of thousands of Germans, Hungarians and Czechs were evacuated from their homes on Wednesday as soldiers raced to pile up sandbags to hold back rising waters in the region's worst floods in a decade..."


 

Space Weather Needs More Attention, Experts Say. It would be ironic if the biggest threat originated not from a tornado, hurricane, earthquake or tsunami, but from our nearest star. Could a G-class (Black Swan) solar flare bring down our power grid? The idea isn't as far-fetched as it sounds. Here's a clip from the Courier-Post: "...Experts say the public pays little attention to solar flares, geomagnetic storms and other conditions lumped into the “space weather” category. Scientists themselves have begun only recently to understand its patterns and effects and are developing more reliable ways to predict activity. What they do know is there’s a lot at stake. A 2009 National Academy of Sciences report warned of global disruption if a powerful solar-powered storm affected Earth. Using evidence from storms in 1859, 1921 and 1989, the report said massive power outages would be accompanied by radio blackouts and satellite malfunctions. Telecommunications, GPS navigation, banking, finance and transportation would all be affected..."

Image credit above: "The largest solar storm in five years erupted in March 2012, sending charged particles toward Earth with the potential to disrupt power grids, navigation systems and satellites." / AP

 

Play Misty For Me: Cubs, White Sox Play Fog Ball. The game must go on! Here's a funny clip from SportsGrid: "Brandon Phillips is The Smoke Monster. On a ridiculous fog-shrouded day at Wrigley Field (I mean, look at the field), Phillips had a grand slam and drove in all six of the Reds’ runs in a 6-2 win over the Cubs..."

 

79 F. high Tuesday in the Twin Cities.

78 F. average high for June 11.

74 F. high on June 11, 2012.

 

 

TODAY: Morning T-storms likely with locally heavy rain, gradual PM clearing. Winds: N 10-15. High: 77

 

WEDNESDAY NIGHT: Clearing and pleasant. Low: 59

 

THURSDAY: Plenty of sun, pleasant. Best day in sight. High: 78

 

FRIDAY: Fading sun, late day thunder. Wake-up: 58. High: 76

 

SATURDAY: AM storms, then clearing. Wake-up: 63. High: near 80

 

SUNDAY: Sticky, few pop-upT-storms possible later in the day. Wake-up: 64. High: 82

 

MONDAY: Partly sunny, pleasantly warm. Wake-up: 63. High: 77

 

TUESDAY: Generous sunshine. feels like June again. Wake-up: 64. High: 81

 

 

Climate Stories...

 

Greenhouse Gases Nearing Highly Dangerous Levels, Study Finds. Here's a clip from a story at The Chicago Tribune: "...The IEA report, Redrawing the Energy-Climate Map, says carbon dioxide emissions grew at a rate of 1.4% in 2012, releasing a record 31.6 gigatons into the atmosphere. On this current path, the world’s average temperatures are on track to increase between 3.6 degrees Celsius to 5.3 degrees Celsius, or 6.48 degrees Fahrenheit to 9.54 degrees Fahrenheit, by the end of the century, said the IEA, an independent research group established by the world’s most industrialized nations. “Climate change has quite frankly slipped to the back burner of policy priorities,” said IEA Executive Director Maria van der Hoeven. “But the problem is not going away — quite the opposite...”

 

Waiting On A New Climate Deal "Will Set World On A Path to 5C Warming". Here's an excerpt from an Op-Ed at the International Energy Agency's Chief Economist in The Guardian: "...The world cannot afford to wait for a new global climate change agreement to come into force in 2020, because doing so will mean an end to hopes of limiting global warming to moderate levels, one of the world's foremost authorities on energy has warned. Carbon dioxide emissions from energy rose by 1.4% in 2012 to a record high of more than 31bn tonnes, according to a report from the International Energy Agency on Monday, driven in part by a striking 6% rise in emissions from Japan following its phase-out of nuclear power and continuing growth in emissions from China. Fatih Birol, chief economist at the IEA, and one of the world's most respected energy experts, told the Guardian that greenhouse gas emissions were continuing to rise so fast that pinning hopes on a replacement for the Kyoto protocol would set the world on a path to 5C of warming, which would be catastrophic..."

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