Monthly Archives: April 2011

National Weather, Natural Disasters

The South tries to recover amongst devastation of 2nd deadliest tornado outbreak on record

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Damage from an EF5 tornado that struck Smithville, Miss., on April 27, 2011.
Damage from an EF5 tornado that struck Smithville, Miss., on April 27, 2011. Click the image for a slideshow of the devastation. (NWS)

With entire towns reduced to rubble and damage spread across seven states, people in the southeastern United States began the long task of recovery.  The tornadoes that struck this past week claimed 341 lives and achieved the unwanted status as the 2nd deadliest single-day tornado outbreak in U.S. history.

President Barack Obama toured the devastated city of Tuscaloosa in Alabama yesterday saying, “I have never seen devastation like this. It is heartbreaking.”

The National Weather Service received 211 tornado reports during the outbreak, a number that will be reduced once duplicates are removed.  No matter the number of twisters, the results were nothing short of devastating.

One tornado that struck near Smithville, Mississippi has received an EF-5 rating – the highest possible.  Meteorologists estimate that twister packed winds of 205mph.  A tornado in Georgia was rated an EF-4 and at least five EF-3 tornadoes struck Alabama.  Weather service officials say they expect more twisters could receive the highest rating as they continue their investigation.

With 341 lives confirmed lost and the number expected to continue to grow, the outbreak ranks as the 2nd deadliest single-day outbreak on record.  It surpassed the “Super Outbreak” of 1974 and a 1932 outbreak in the Deep South.

Some are speculating the toll will grow enough for the event to become the worst in history, a truly nightmare scenario.  The Tri-State tornado on March 18, 1925 claimed the lives of 747 people.  One tornado alone in that outbreak tracked 234 miles across Missouri, Illinois and Indiana.

Slideshow: DigitalGlobe, NASA and Geoeye satellites provide view of tornado devastation
Slideshow: DigitalGlobe, NASA and Geoeye satellites provide view of tornado devastation

Obama has promised to speed federal aid to the region as governor’s in the hardest hit states declared states of emergency. “We can’t bring those who’ve been lost back. They’re alongside God at this point … but the property damage, which is obviously extensive, that’s something we can do something about,” the president said.

Damage estimates continue but an untold number of homes have been destroyed, certainly a number in the thousands.  Insured losses could reach between $2 billion and $5 billion which would push the disaster into the top 10 list of most expensive natural disasters in US history.

We are providing complete coverage of the tornado outbreak on Examiner.com.  Please visit the following links for more information.

Photo slideshows:

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National Weather, Natural Disasters

Disaster strikes: Worst tornado outbreak in more than 30 years hits the South

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A tornado is seen ripping through Tuscaloosa, Alabama. View more images in the slideshow below.
A tornado is seen ripping through Tuscaloosa, Alabama. View more images in the slideshow below. (Credit: yfrog / bamawx)

A virtually unrivaled severe weather outbreak hit the southern United States yesterday bringing death and destruction.  The death toll from the event continues to climb and now ranks as the second worst since 1950.

The evaluation on the number of tornadoes and their power has begun by the National Weather Service.  The Storm Prediction Center recorded 164 reports but a number of those will be eliminated as duplicates of the same twisters.

Harold Brooks, a meteorologist with the SPC, told the Associated Press that he believed as many as 60 reports may be attributed to a single long-track tornado.  He further said that some may have achieved the EF-5 rating, the highest possible that generates winds in excess of 200mph.

Recovery efforts across the nation’s South continue as resources continue to arrive.  The Red Cross and other relief agencies were sending personnel from across the nation to help with search and rescue and to help with the distribution of water, food and other necessities.

  • Check out images and video of the tornadoes below

More than 1 million people were still without power this evening in Georgia, Alabama and Tennessee.  The Browns Ferry nuclear power plant west of Huntsville lost power from the storms but was able to safely shut down.

Alabama announced 11 more fatalities bringing the state’s losses to at least 195.  Overall at least 284 people across six states were killed making the disaster one of the worst tornado outbreaks in U.S. history.  Only the “Super Outbreak” of 1974 caused more deaths.

Photo slideshow - Death and destruction in Alabama in the wake of tornado outbreak.
Photo slideshow - Death and destruction in Alabama in the wake of tornado outbreak.

Tuscaloosa Mayor Walter Maddox said, “I don’t know how anyone survived.”  The mayor toured his city by helicopter and was stunned by the devastation. “We have neighborhoods that have been basically removed from the map,”Maddox said.

States of emergency were declared in Mississippi, Alabama, Arkansas, Tennessee, and Georgia.  President Barack Obama announced that he would speed federal aid to the disaster stricken region and would visit Alabama personally on Friday.

For complete coverage of the tornado outbreak, please visit the Natural Disasters Examiner.

Do you know what to do when severe weather strikes? Learn how to protect you and your family:

National Weather, Severe Weather

Good Friday tornado strikes St. Louis airport; Twister rated EF4

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Extensive damage seen at St. Louis airport after tornado strikes. (Twitpic / LakishaJackson)
Extensive damage seen at St. Louis airport after tornado strikes. View more images in the slideshow below. (Twitpic / LakishaJackson)

Severe weather struck the St. Louis area Friday evening bringing large hail, damaging winds and powerful tornadoes.  One twister tore a lengthy pass through the city hitting the airport and causing extensive damage to the facility and nearby homes.

The most significant component of the storm system was a powerful EF4 tornado packing winds of more than 166mph at its peak and causing damage nearly one-half mile wide at the widest point.  Initially touching down west of Lambert-St. Louis International Airport, the tornado followed a 22 mile long path destroying homes and causing extensive damage at the airport.

At the airport tornado sirens were sounded as the storm approached and many of the estimated 500 travelers at the airport sought shelter.  The powerful tornado struck and blew out 60 percent of the windows in the main terminal building and partially lifted the roof on Concourse C.

On the grounds of the airport baggage carts were tossed about and the tarmacs were littered with debris.  Parking areas saw cars smashed and thrown into each other like toys.

Residential areas to the west of the airport where the tornado first touched down bore the brunt of the damage, particularly in the community of Bridgton.  Many homes were reduced to piles of wood and cinder while trees and power lines were downed.

After crossing the airport the tornado continued on its path damaging other buildings and homes.  Extensive roof damage was caused to the First Baptist Church of Ferguson and a Little Caesars Restaurant saw its roof torn completely off.

Slideshow: Lambert-St. Louis International Airport struck by tornadoThe tornado then crossed the Mississippi River into Illinois.  Three homes saw their roofs torn off while others sustained significant damage.

Despite the twister’s lengthy path of destruction and powerful nature, no fatalities were reported.  At the airport five people were treated for relatively minor injuries.

Do you know what to do to protect yourself and your family when severe weather strikes? The same type of events that struck in recent days can and do occur in Colorado.  Check out our Severe Weather Awareness series for more:

Weather History

April 24 to April 30 – This Week in Denver Weather History

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April 24 to April 30 - This Week in Denver Weather History
April 24 to April 30 - This Week in Denver Weather History

Weather in Colorado is always interesting but springtime can bring the entire gamut of conditions. Looking back at this week in Denver weather history we see just how varied this time of year – from flooding rains to heavy snowfall to severe thunderstorms it can and has all happened.

From the National Weather Service:

23-24

In 1883…snowfall totaled 7.6 inches in downtown Denver.

In 1904…a thunderstorm produced hail during the late evening of the 23rd. Apparent post-frontal rain changed to snow during the early morning of the 24th…but totaled only 2.0 inches. Precipitation consisting of rain…melted hail…and snow totaled 0.60 inch. Northeast winds were sustained to 41 mph with gusts as high as 52 mph on the 24th.

In 1905…rain changed to snow and totaled 8.0 inches. Much of the snow melted as it fell with only 2.5 inches measured on the ground. Precipitation totaled 1.88 inches. Northeast winds were sustained to 20 mph on the 23rd.

In 1942…the South Platte River reached flood conditions in the city. As many as 15 thousand residents were warned to evacuate their homes temporarily. Two lives were lost in the city. Four bridges were washed out by the flood waters and other bridges were endangered. The damage was generally limited to bridges that were in poor condition. However…the flood waters did not overflow their channel banks within the city limits.

In 1980…heavy rain began in the eastern foothills on the night of the 23rd and turned to heavy wet snow on the 24th. Up to a foot and a half of snow fell in the foothills west of Denver. At Stapleton International Airport precipitation totaled 1.58 inches…but only 3.7 inches of snow fell from the storm. East winds gusted to 24 mph.

In 1997…locations in and near the foothills received the greatest snow of the year as a winter-like storm system moved into metro Denver. East to southeast winds at speeds of 15 to 35 mph were common with even stronger gusts above 9 thousand feet. Snow fell at a rate of 2 to 3 inches an hour as deep upslope combined with a moist and unstable air mass. The snow began in the foothills above 7500 feet during the evening of the 23rd. By sunrise the snow level had dropped to 5000 feet. The hardest hit areas extended from I-25 into the foothills. Snowfall totals in the foothills ranged from 1 1/2 to over 3 1/2 feet. In the city…snowfall ranged from 8 to 18 inches. Some snowfall amounts included: 36 inches at Coal Creek Canyon; 31 inches at Nederland and Wondervu; 20 to 24 inches near Blackhawk… At Echo Lake…and North Turkey Creek Canyon; 15 to 19 inches at Boulder…central city…conifer…Evergreen…Georgetown… And Louisville; 8 to 14 inches in Arvada…Broomfield… Westminster…Wheat Ridge…Castle Rock…and Ken Caryl Ranch. Only 2.3 inches of snow fell at the site of the former Stapleton International Airport on the 24th. East winds gusted to 36 mph at Denver International Airport on the 24th.

In 2003…a strong and deep northerly flow circulating around a closed upper low pressure center allowed heavy snow to fall in the mountains and eastern foothills. Snowfall totaled 14 inches in Idaho Springs. Rain was mixed with snow and thunder across metro Denver. Snowfall was only 0.9 inch overnight at the site of the former Stapleton International Airport. Precipitation totaled 1.34 inches at Denver International Airport…where northwest winds gusted to 55 mph on the 23rd.

In 2007…a storm system intensified over southeast Colorado… Allowing for heavy snow and rain to develop over much of north-central and northeast Colorado. Severe thunderstorms preceded the storm system on the 23rd…affecting the urban corridor. Nickel size hail was reported in Boulder and a small landspout touched down near Byers. On the 24th…heavy snow fell in the foothills west of Denver and Boulder…where storm totals ranged from 1 to 2 feet. Heavy snow also occurred along the palmer divide…with storm totals of 10 to 16 inches. Elsewhere…a steady moderate to heavy rainfall was reported. Denver International Airport measured 2.09 inches of rainfall…which shattered the previous 24-hr record of 1.29 inches for the 24th of April. The heavy wet snow caused several power outages. In some instances it took several days to restore power. Several road closures were reported…including interstates 25 and 70. A jackknifed semi-trailer backed up traffic for nearly 20 miles…on southbound I-25…between Denver and Colorado springs. In addition…a 50-ton Boulder blocked the southbound lane of State Highway 285…near Parmalee Gulch. Crews had to use explosives to break up the Boulder and clear the debris. Stranded buses and impassable roadways also forced several school closures.

Continue reading April 24 to April 30 – This Week in Denver Weather History →

Natural Disasters, Thornton Weather, Weather Education

What not to do when faced with a tornado

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When faced with a tornado what would you do? Do the smart thing and drop the camera and seek shelter.
When faced with a tornado what would you do? Do the smart thing and drop the camera and seek shelter.

Just as we were wrapping up Severe Weather Awareness Week on ThorntonWeather.com, disaster struck the nation’s south.  Dozens of tornadoes brought death and destruction and at the same time Mother Nature allowed us to learn valuable lessons.

Extreme weather events have gotten more and more attention thanks to Twitter, YouTube, Facebook and other forms of social media.  Television shows like Discovery’s Storm Chasers and shows on the Weather Channel feed a seemingly insatiable desire to see these events.  They give the impression that anyone can stare down major storms with few repercussions but that is far from the truth.

Professional weather watchers, meteorologists and storm chasers cringe at some of what we see when these events happen.  People with seemingly no clue of the destructive and unpredictable nature of what they are looking at put themselves in harm’s way for 60 seconds of fame.

The severe weather outbreak of recent days highlights the folly of those uninitiated and untrained in these phenomena.  One particularly striking video has emerged of a man in Wilson, North Carolina watching as a tornado approaches, talking on the phone and shooting video.

The video (below) is scary to watch as the man is oblivious to what is coming toward him at 50mph.  We implore all ThorntonWeather.com readers to do the smart thing – seek shelter when severe weather.  Don’t become a statistic for a photo or a video.

For more on social media and the lessons that can be learned, check out this story from the Natural Disasters Examiner.

National Weather, Natural Disasters

Three-day severe weather outbreak kills dozens across nation’s south

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Debris is scattered through Sanford, North Carolina in the wake of one of dozens of tornadoes that truck in the past three days. (Yfrog / SanfordHerald http://yfrog.com/h4rystdj)
Debris is scattered through Sanford, North Carolina in the wake of one of dozens of tornadoes that truck in the past three days. View more images in the slideshow below. (Yfrog / SanfordHerald http://yfrog.com/h4rystdj)

One series of storms moved across the southeastern United States over a period of three days and wreaked havoc along the way.  In their wake more than three dozen people are dead from the severe weather that brought tornadoes, hail and wind.

On Thursday Oklahoma and Arkansas were the first to experience the severe weather that spawned a line of storms hundreds of miles long.  Nine lives were lost in those two states between tornadoes and deadly winds.

Friday the storms moved to the east and visited their destruction on Mississippi and Alabama.  Seven fatalities were recorded including a mother and two of her children.

Mother Nature was not done yet and created an amazing display of storms as the weather system continued on its deadly path on Saturday.  The Carolinas and Virginia were next on the hit list where as many as two dozen people have been killed.

The most destructive tornado struck near Sanford, North Carolina with dozens of homes and businesses reduced to rubble.  A Lowe’s Home Improvement store suffered a direct strike collapsing the front half of the store.  Miraculously no one was killed in the structure.

An untold number of homes and businesses have been destroyed in the severe weather outbreak.  Trees and power lines were toppled and hundreds of injuries recorded.

Slideshow: Severe weather outbreak kills dozens, destroys homes and businessesThe death toll from the three-day severe weather outbreak continues to climb with some accounts pegging the number at 45 or more.  The Storm Prediction Center recorded 230 reports of tornadoes over the period and the event is by far the most extensive and deadly weather event thus far in 2011.

For more on this story visit the Natural Disasters Examiner.

Do you know what to do to protect yourself and your family when severe weather strikes?  The same type of events that struck in recent days can and do occur in Colorado.  Check out our Severe Weather Awareness series for more:

Weather History

April 17 to April 23 – This Week in Denver Weather History

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April 17 to April 23 - This Week in Denver Weather History
April 17 to April 23 - This Week in Denver Weather History

As we enter the latter half of April the weather history calendar starts to reflect shift in the type of weather events we see. There are still plenty of significant snowfall events. However spring severe weather starts to appear with greater frequency including heavy rain, hail and even tornadoes.

From the National Weather Service:

13-17

In 2001…a huge dust storm over southern and Inner Mongolia during April 3rd through the 6th lifted desert dust into the jet stream. This dust cloud moved over metro Denver on the 13th and persisted through the 17th. The cloud created widespread haze…giving the sky a milkish cast due to the scattering of incoming solar radiation.

15-17

In 1922…heavy snowfall totaled 9.0 inches in downtown Denver. Most of the snow…6.0 inches…fell on the 16th. This was the third major snow storm in a week. Northwest winds were sustained to 43 mph with gusts to 47 mph on the 15th.

16-17

In 1944…heavy snowfall totaled 7.5 inches in downtown Denver. Northwest winds were sustained to 18 mph on the 16th.

16-18

In 2009…a potent spring storm brought heavy snow to locations in and near the Front Range foothills. A deep easterly upslope produced nearly 5 feet of snow in parts of the foothills. The heavy snow resulted in the closure of Interstate 70…from Golden west to Vail…for approximately 16 hours. The heavy snow snapped power lines in Evergreen and Nederland. The ensuing outages affected 14200 residents. In the Front Range foothills…storm totals included: 56 inches…3 miles south of Rollinsville; 54 inches…3 miles southeast of Pinecliffe…43 inches at Aspen Springs…42 inches at Evergreen…38 inches near conifer; 37 inches at St. Mary’s glacier…and 34 inches near Nederland. Along the urban corridor and Palmer Divide…the heaviest snow occurred above 5500 feet on the 17th. Storm totals included: 22 inches…8.5 miles southwest of Franktown; 18 inches…10 miles south-southeast of Buckley Air Force Base; 17 inches near Cherry Creek and 7 miles south of Sedalia… 16 inches…6.5 miles southwest of Castle Rock; 15 inches near Beverly Hills; 12 inches near Highlands Ranch and Lafayette…with 11 inches in Broomfield. Elsewhere storm totals ranged from 4 to 10 inches. Officially…only 2.6 inches of snow was observed at Denver International Airport. The 24-hr precipitation for the day however was 1.16 inches… Which established a new record for April 17th.

17

In 1889…northwest winds were sustained to 48 mph.

In 1899…apparent post-frontal north winds were sustained to 42 mph with gusts as high as 48 mph.

In 1935…light dust moved over the city behind an apparent dry cold front…which produced northeast winds to 19 mph with gusts to 20 mph.

In 1978…winds estimated to 70 mph occurred in Morrison. Northwest winds gusted to 49 mph at Stapleton International Airport.

In 2000…strong pre-frontal winds and widely scattered thunderstorms caused high winds to develop across northern metro Denver and portions of the northeast plains. Peak wind gusts included 75 mph at Louisville. South winds gusted to only 28 mph at Denver International Airport.

In 2002…strong southwest winds in advance of a cold front gusted to 52 mph at Denver International Airport.

In 2003…severe thunderstorms produced 1 inch diameter hail 7 miles east of Brighton. Strong thunderstorm winds blew out an auto windshield near Denver International Airport where south winds gusted to 48 mph.

Continue reading April 17 to April 23 – This Week in Denver Weather History →

National Weather

Severe weather tears across the south, nine killed

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The town of Tushka, Oklahoma saw extensive damage Thursday night when a tornado struck claiming at least two lives. (Twitpic / snickeraddict15 - http://twitpic.com/4l42do)
The town of Tushka, Oklahoma saw extensive damage Thursday night when a tornado struck claiming at least two lives. (Twitpic / snickeraddict15 - http://twitpic.com/4l42do)

Two days of severe weather have spawned more than two dozen tornadoes, dropped softball size hail and unleashed damaging winds.  The storms which have affected five states turned deadly and claimed the lives of nine people.

Yesterday a massive line of storms stretching from northern Kansas down to southern Oklahoma struck.  The town of Tushka, Oklahoma took a direct strike from the storm destroying many homes and as many as five school buildings.  Two elderly women were killed.

Early this morning the same storm system moved to the east bringing powerful winds to 80mph.  Seven people were killed including a six-year-old boy and an 18-month-old girl.  The boy’s life was claimed when a tree six feet in diameter fell on the family home.

Today the severe weather has continued as the storms continue their terrifying rampage.  More than 40 tornadoes have been reported, most in Mississippi and Alabama, and as of this writing they continue their movement east.

Extensive damage has been seen in both states.  In Talladega, Alabama, NASCAR officials were warning fans to be ready to evacuate as the racetrack is under a tornado watch until 9:00pm.  With tens of thousands of fans on site, officials prepared evacuation routes should the need arise.

Below is video from storm chasers as one tornado crosses a highway in Jackson, Mississippi.

National Weather, Natural Disasters

Video captures tornado ripping through northwestern Iowa

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Saturday evening the stage was set for severe weather across the nation’s heartland and Mother Nature came through in spades.  More than a dozen tornadoes were reported as were scores of significant hail events.

Despite the number of events most resulted in little damage.  However one tornado, by some accounts as big as three quarters of a mile wide, struck the town of Mapleton, Iowa.  This massive wedge tornado struck at 7:21 CDT and caused significant damage in the town.

The video below was captured by storm chasers as they tracked the dangerous tornado.

National Weather, Natural Disasters

CSU hurricane forecasters predict very active Atlantic season

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Forecasters are warning of a very active hurricane season and an increased potential for landfall in the United States. (Natural Disasters Examiner)
Forecasters are warning of a very active hurricane season and an increased potential for landfall in the United States. (Natural Disasters Examiner)

Forecasters at Colorado State University released an updated 2011 Atlantic hurricane forecast that if it holds true, portends a very eventful season.  The forecast warns of a 175 percent above normal level of activity and most troubling warns that the United States is overdue to get struck by a major hurricane.

The 2010 hurricane season was a busy one and saw the third most named storms on record but mercifully, none made landfall in the United States.  For the 2011 season the CSU team expects things to be slightly calmer but still far above normal.

CSU forecasters are calling for 16 named storms during the 2011 Atlantic hurricane season.  Of those they expect nine will become hurricanes and five of those will be major hurricanes (Category 3 or higher).

These estimates far exceed the historical 1950 to 2000 average.  During that period the Atlantic averaged 9.6 named storms per year, 5.9 hurricanes and 2.3 major hurricanes.

The team warned that whether a hurricane forecast calls for above or below normal activity, residents should always be equally prepared.  Dr. Phil Klotzbach said, “It takes only one landfall event near you to make this an active season.”

Breaking down the team’s analysis further, they gave a 72 percent chance that at least one major hurricane will make landfall along the U.S. coastline.  By comparison, the long-term average probability is 52 percent.

This recent 9 of 11-year period without any major landfall events should not be expected to continue.
~ Dr. William Gray

By region CSU forecasters put a 48% chance on the probability that a major hurricane will strike the East Coast.  Nearly matching that they said there was a 47% probably a major hurricane would hit on the U.S. Gulf Coast.

Dr. William Gray noted that overall the Atlantic Basin is primed for significant hurricane activity.  He said that since 1999, only the 2004 and 2005 seasons saw a major hurricane make landfall in the U.S. and this scenario is not likely to continue.  Gray warns, “This recent 9 of 11-year period without any major landfall events should not be expected to continue.”

More hurricane news from the Natural Disasters Examiner: