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Archive for the ‘midwest tornadoes’ Category

Mega Tornadoes to Bombard U-S Tornado Alley

Posted by feww on March 3, 2011

2011 Tornadoes Ever Deadlier: FEWW

Start of Meteorological Spring Signals Hyper Tornado Season

Based on several climatic indicators and recent weather trends, FIRE-EARTH forecasts a deadly peak tornado season in 2011.

“Tornado reports are already coming in,” says the National Weather Service forecast offices.

“Tornado Alley should be geared up. Typical peak tornado season runs from late winter through mid summer. The peak period for tornadoes in the southern plains runs from May to early June. On the Gulf coast, it is earlier during the spring. In the northern plains and upper Midwest, it is June or July. Remember, tornadoes can happen any time of year if the conditions are right.”

The Maximum Threat

The following map shows the time for maximum probability of significant tornadoes.

Time for maximum probability of significant tornadoes (F2 or greater). Source: Severe Thunderstorms Climatology

Time for maximum probability of tornadoes. Source: Severe Thunderstorms Climatology

  1. Tornado
  2. F2 or greater (significant) tornadoes
  3. Wind
  4. Hail

Monthly Probabilities

Any Tornado

Signif. Tornado (F2-F5)

Violent Tornado (F4-F5)

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Monthly frames

Monthly frames

Monthly frames

January January January
February February February
March March March
April April April
May May May
June June June
July July July
August August August
September September September
October October October
November November November
December December December

The probability of having one or more days with a tornado within 25 miles of a point sometime during a month. The base data for all tornadoes are the reports from 1980-1994 and for significant and violent tornadoes are the reports from 1921-1995. The values are probabilities in percent. Source: Severe Thunderstorms Climatology

F5 and EF5 Tornadoes of the United States: 1950-present

[Storm Prediction Center]

Click image to enlarge. Click here for details.

Tornado Stats:

  • Deadliest U.S. tornadoes: The “Tri-state” tornado of 18 March 1925 killed 695 people along a 219 mile track across Missouri, Illinois and Indiana, causing F5 damage. The 25 deadliest tornadoes on record are listed here.
  • The deadliest U.S. tornado days: On 3 April 1974, a “Super Outbreak” of tornadoes killed 308 people. Two lists of the top 15 deadliest tornado days since 1950 are posted here.
  • Biggest outbreak of tornadoes: Some 147 tornadoes touched down in 13 U.S. states on 3 and 4 April, 1974. See map here.
  • The biggest known tornado: “The Hallam, Nebraska F4 tornado of 22 May 2004 is the newest record-holder for peak width, at nearly two and a half miles, as surveyed by Brian Smith of NWS Omaha. This is probably close to the maximum size for tornadoes; but it is possible that larger, unrecorded ones have occurred. “
  • Single month with the most tornadoes: Tornado record was set in May 2003, with 543 tornadoes touchdowns confirmed . Previous record was 399, set in June 1992 (modern tornado records began in 1950).
  • The strongest tornado/ the highest wind speed in a tornado: Not Known! “Tornado wind speeds have only been directly recorded in the weaker ones, because strong and violent tornadoes destroy weather instruments. Mobile Doppler radars such as the OU Doppler on Wheels have remotely sensed tornado wind speeds above ground level as high as about 302 mph (on 3 May 1999 near Bridge Creek OK)–the highest winds ever found near earth’s surface by any means. [That tornado caused F5 damage.] But ground-level wind speeds in the most violent tornadoes have never been directly measured.”
  • The costliest tornado: The Topeka (KS) tornado of 8 Jun 1966 is believed to be the costliest. The tornado caused damage estimated at  $1,599,537,000 in 2007 dollars, after adjusting for inflation. “The Bridge Creek-Moore-Oklahoma City-Midwest City, OK, tornado of 3 May 1999 currently ranks first in actual dollars but third when inflation adjusted.  A list of  top-10 tornado damage in 2007 dollars is posted here. SOURCE: Storm Prediction Center

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Humongous Wind Storm Wreaks Havoc in the Midwest

Posted by feww on October 27, 2010

Massive Storm System Causes Substantial Damage in Parts of the U.S.

A massive wind storm, extending more than 2,000km (1,200 miles) north to south, pummeled the Midwest Tuesday, spawning tornadoes, causing widespread damage, and disrupting air travel throughout the region. Some 31 states were impacted by the storm system.

Click Image to enlarge. (24-Hr FE ED). Click HERE to Animate Image. (Source: SSEC/Wisc-Uni)

IR satellite image of the massive storm system heading north to Canada Tuesday after causing widespread damage in the midwest.Source: NOAA.

The system set a record low barometric pressure of 955.2mb in Minnesota, or the equivalent of cat. 3 hurricane [on land.]  The storm caused significant damage to buildings in Lincoln County, N.C., Racine, Wisconsin and Peotone, Illinois. Some structural damage in St. Louis, Missouri, were also reported.
At least 11 people were injured after a tornado swept through Lincoln County, N.C. causing extensive damage to homes and vehicles, reports say.

Click image to update.


Tornado watches extended from western New York through Pennsylvania, Ohio, West Virginia, Virginia, Kentucky, Tennessee, North Carolina, Georgia, Alabama and Mississippi, as well for southern Ontario, Canada. At least 21 tornadoes were reported by Tuesday evening.

National Weather Service Warnings, Watches and Advisories

Click image to enter NOAA portal.

Related Links:

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Tornado Headlines

Posted by feww on April 27, 2009

NWS Warnings and Forecasts

Source: National Weather Service/NOAA

1 Dead After Severe Storms Rake Midwest

Severe thunderstorms raked parts of the Midwest on Saturday, killing a motorcyclist, spawning tornadoes that damaged several homes and sent race fans fleeing, snarling air traffic and knocking out power.

Tornadoes touched down in southern Leavenworth County, Mo., northwest of Linwood, and in Butler County, Kan. No injuries were immediately reported. Source Your Fox. Image may be subject to copyright.

NWS issued a tornado watch for all of western Oklahoma

On Sunday, the National Weather Service issued a tornado watch for all of western Oklahoma until 10 p.m. as pockets of storms moved across the state.

Strong front brings possibility of tornadoes, severe storms

A moderate risk covers most of the rest of central and northern Kansas, including Wichita.

Tornado damages some rural areas, halts races

KANSAS CITY — Severe thunderstorms spawned at least one tornado that damaged rural homes and structures, and sent race fans fleeing from the Kansas Speedway.

The tornado touched down in southern Leavenworth County, northwest of Linwood. Leavenworth County emergency management reported barns were destroyed and some homes were severely damaged, with some cars flipped over.

Over 23,000 Hydro One customers without power after storm

Thunderstorms  started in Michigan before making it’s way to  Southwestern Ontario causing power outages for thousands of residents.

The region reached highs of 27.5 degrees yesterday. In the early evening that was joined by damaging thunderstorms and unstable air.

Severe storms possible across Oklahoma

OKLAHOMA CITY (AP) – Tomorrow could be a day of volatile weather across much of Oklahoma.

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