[ACTUEEL] Tornado's VS #23 Nieuw seizoen van start

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Op woensdag 16 juli 2014 14:27 schreef Frutsel het volgende:
Tornado Hunters - Series starts August 2014

http://globalnews.ca/news(...)tured-in-web-series/

Voor de liefhebbers

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Op woensdag 5 november 2014 11:57 schreef aloa het volgende:
Genesis and maintenance of a long-track EF5 torna…:

Genesis and maintenance of a long-track EF5 tornado embedded within a supercell thunderstorm

Stormscapes 2 door Nicolaus Wegner

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Nicolaus Wegner's Stormscapes 2 video is the most impressive collection of time-lapse severe storm footage I've ever seen. His 7-minute time-lapse compilation of his May - September 2014 adventures in Wyoming, Montana, South Dakota, Nebraska, and Colorado feature an impressive rainbow at 0:40, an incredible orange cumulonimbus at 4:00, a sequence of spectacular funnel clouds and tornadoes beginning at 5:10, and some stunning mammatus clouds at 6:04. Highly recommended.

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Op maandag 24 november 2014 13:54 schreef Frutsel het volgende:

Stormscapes 2 door Nicolaus Wegner

[..]

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Vier doden bij tornado in Mississippi

Vlak voor Kerstmis zijn in de Amerikaanse staat Mississippi vier mensen bij een tornado om het leven gekomen.

De wervelstorm vernielde volgens zender WDAM delen van de plaats Columbia. Twee mensen overleden toen het natuurgeweld hun wooncaravan trof. Twintig mensen raakten gewond, aldus ABC News.

Huizen raakten beschadigd, auto’s werden in de lucht geslingerd en bomen ontworteld. Duizenden mensen zaten tijdelijk zonder stroom.

In twee districten is de noodtoestand uitgeroepen. Ook in de staten Georgia en Louisiana waren er tornado’s.

twitter:

Frutseltjuh twitterde op woensdag 25-02-2015 om 13:47:39 1 maart start het #tornado seizoen weer in de VS. Join us en volg het seizoen tot in de late uurtjes via de streams.http://t.co/bELhGViLH6 reageer retweet

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Op woensdag 25 februari 2015 13:55 schreef MaryMouse het volgende:

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Frutseltjuh twitterde op woensdag 25-02-2015 om 13:47:39 1 maart start het #tornado seizoen weer in de VS. Join us en volg het seizoen tot in de late uurtjes via de streams.http://t.co/bELhGViLH6 reageer retweet

Meldt zich vast

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Severe Weather Forecast: A Few Severe Storms Possible on Thursday`

A rainy weather pattern will be accompanied by some thunderstorms in the South late this week.

Although widespread severe weather is not expected from the disturbances causing the rain, a few storms could turn severe. This potential threat will mainly stay confined to the Gulf Coast states.

On Thursday, the chance for a few severe storms will be from Louisiana and southeast Arkansas to Mississippi, southern/central Alabama, southwest Georgia and the Florida Panhandle. The main threats are localized damaging wind gusts and perhaps a brief tornado. Heavy rain could also trigger local flash flooding.

Below, we have more details on severe weather threats across the country. You can scroll down the page, or click on these links to jump to your area of interest.

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25 Years Ago Today: An Early Outbreak for Tornado Alley

The U.S. is in the midst of an extremely quiet March for severe weather thus far, with no tornadoes and only three reports of large hail. Things looked far different 25 years ago today, as the central Great Plains endured its worst late-winter tornado outbreak on record. From March 11 to 13, 1990, more than 60 tornadoes plowed across Tornado Alley, from north Texas to Iowa. The meteorological setup for this outbreak was classic, but the seasonal timing wasn’t. Never before or since have such strong tornadoes been observed so far northwest so early in the year.

Figure 2. Tracks and intensities of the tornadoes observed on March 13-14, 1990, across the central Plains. Image credit: National Weather Service.

The standouts of this outbreak were two long-lived F5 tornadoes that raked central Kansas on the late afternoon of March 13. The twisters were the first in a family of five generated by a single supercell thunderstorm. The first one developed near the town of Pretty Prairie, west of Wichita, and went on to strike the town of Hesston near the end of its 48-mile path, destroying more than 200 homes. As this F5 tornado narrowed and dissipated, a new one formed about a mile to its north within the same larger-scale circulation. An analysis by eminent tornado scientist Theodore “Ted” Fujita found that the two twisters likely rotated around a common axis as the first one dissipated and the second one expanded, delivering a glancing blow to the town of Goessel along its 22-mile path. There have been only four other days since 1950--and none so early in the year--with at least two tornadoes producing F5 or EF5 damage (May 25, 1955; May 15, 1968; April 3, 1974, and April 27, 2011).

Despite the strength and longevity of the Hesston and Goessel tornadoes, they caused only two fatalities. The low death toll becomes even more impressive when you consider the limits of communication and warning technology circa 1990. At that time, the National Weather Service office in Wichita still relied on a 1957-vintage, pre-Doppler weather radar that tracked precipitation but provided no wind data. ”We would draw what we saw on a reflection plotter and then trace contours on a paper map overlay to locate a storm geographically,” recalled Randy Steadham, who was filling in as meteorologist in charge of the Wichita NWS office. The emergence of a classic hook echo on radar, plus a number of eyewitness reports, helped the office to track the storm closely and issue updates roughly every 9 minutes, which made it to the public via radio, TV, and NOAA Weather Radio.

1990 Hesston, Kansas Tornado

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Tornado season is off to a slow start
But March has been known for its deadly and notable severe weather outbreaks in the past.

Not a single tornado has been reported to the National Weather Service so far in March, which typically marks the first month of severe weather season in the Plains and Southeast. According to the Weather Channel’s severe expert Greg Forbes, the only other year since 1950 that there have been zero tornado reports in the first half of March was 1969.

Just seven severe weather reports — two for large hail and five for strong winds — have been reported so far this month. From 1991 to 2010, an average of 80 tornadoes were reported in the month of March across the United States, with the largest number being reported in the South.

January and February were also extremely quiet, weather.com reports:

As of March 12, only 27 tornadoes had been documented across the nation, according to statistics from The Weather Channel severe weather expert Dr. Greg Forbes. This is the slowest start to the year, tornado-wise, since the 21 tornadoes recorded through March 12, 2003.

February was eerily quiet, with only two tornadoes reported during the month; one in California, the other in Florida. According to statistics kept by Dr. Forbes, only three other Februaries since 1950 saw two or fewer tornadoes in the U.S.: 2010 (1), 2002 (2) and 1964 (2).

Greg Carbin, warning coordination meteorologist at the Storm Prediction Center (SPC) noted only four tornado watches were issued by the SPC in January and February combined, the fewest in the year’s first two months since 1985 required only two tornado watches.

twitter:

weatherchannel twitterde op dinsdag 24-03-2015 om 23:48:25 3D radar shows big #Hail building in these 2 storms just SW of #Springfield MO #mowx #severe http://t.co/hvTucqlTia reageer retweet

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TWCBreaking twitterde op woensdag 25-03-2015 om 00:55:59 Tornado Warning for Boone and Marion Counties in AR until 7:30 PM CDT http://t.co/ruJjPGx9Ua reageer retweet

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Another disturbance will move into the Plains on Wednesday bringing the risk for large hail, damaging winds and isolated tornadoes.

The first severe thunderstorm watch of 2015 was issued over parts of four states as the first threat of organized springtime severe weather targeted the nation's midsection on Tuesday. There were more than 60 reports of hail between 1 and 2 inches in diameter on Tuesday night.

In what has been a very quiet year for severe weather, NOAA's Storm Prediction Center had issued only four watches this year before Tuesday's watch. All of those were tornado watches – three in January and one in February.

Wednesday: Scattered severe thunderstorms should again break out by mid-late afternoon, this time near the intersection of a bulge in a surface dryline and cold front in Oklahoma, north Texas and southeast Kansas. During the evening, this activity is expected to form a squall line and push across central and southern Missouri and at least northern Arkansas. Damaging winds and large hail will again be the primary threats, but a tornado cannot be ruled out.

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weatherchannel twitterde op woensdag 25-03-2015 om 12:46:55 #TorCon of 4 today for SW #Missouri, NW #Arkansas & NE #Oklahoma. Latest forecast: http://t.co/RgUUdZYVO7 #tornado http://t.co/ObPzNkMzIA reageer retweet