* Spring will be a nightmare. Ohio, Michigan, Indiana and other states will suffer flooding. Kentucky, Michigan, Iowa, Kansas, Texas, and some upper states will have a series of violent tornadoes. These will be unusual for the areas as many of them will be large (a three or above). There will also be tornadoes in unusual places such as New York, and possibly Las Vegas as well a some in California.
Update: April 24, 2011 – 60-Year Data: Tornadoes a Major Threat Beyond ‘Tornado Alley’
“Tornado Alley,” the Southern Plains, has earned its infamous reputation for being the most tornado-prone region in the world. From a climate perspective, though, the tornado threat is relatively high across much of the United States.
The recently updated severe report database of the government’s Storm Prediction Center, now including data from 1950 through 2010, indicates that tornado touchdowns are indeed most common in the Plains. However, tornado touchdowns have been widespread across much of the United States.
The recently updated severe report database of the government’s Storm Prediction Center, now including data from 1950 through 2010, indicates that tornado touchdowns are indeed most common in the Plains. However, tornado touchdowns have been widespread across the eastern two-thirds of the nation and have dotted the Rockies and the West Coast.
This year so far has been particularly active in terms of tornado formation, with the Storm Prediction Center having accumulated more than 700 preliminary reports during that time. While the confirmed number might be slightly lower, the number is approaching half of the three-year average of 1,376 in fewer than four months.
And the most active months for tornadoes — May and June — are still to come. Paul Yeager – AOL News
Update: May 31, 2011 – Officials Assess Damage in Michigan – A day after a wind storm battered Battle Creek, emergency crews were assessing damage and beginning to repair the damage.
“We are still in damage mode,” Battle Creek Emergency Services Coordinator Mike McKenzie said Monday afternoon. “It is very heavy damage and it is widespread. We have not seen this much damage in a long time.”
The National Weather Service, after viewing the situation from the ground and air, said in a preliminary evaluation that damage to thousands of trees and dozens of buildings in the greater Battle Creek area and portions of Calhoun County was caused by straight-line winds of between 75 and 100 miles per hour.
“It was mostly straight winds with some tornadic swirl,” said Dan Cobb from the NWS office in Grand Rapids. He flew over the greater Battle Creek metropolitan area Monday morning in a helicopter provided by Enbridge Inc. Battlecreek Inquirer
Update: June 1, 2011 – Tornado Forms in Massachusetts over Conneticut River
An EF-3 Tornado tracks from West Springfield across North End Bridge & Memorial Bridge into downtown Springfield. Water siphoned up and mixes with debris. Western Massachusetts hit by 3 tornadoes June 1st, 2011; thus far 4 deaths.
Footage is from CBS-3 remote operated camera atop a building- hence no sound. You Tube
Update: Retrieved June 6, 2011 from Wikipedia – Tornado Outbreaks
As of June 1, there have been 1,448 tornadoes reported in the US in 2011 (of which at least 1,007 were confirmed). 2011 has been an exceptionally destructive and deadly year for tornadoes; worldwide, at least 537 people perished due to tornadoes: 12 in Bangladesh, one in New Zealand, one in the Philippines and an estimated 523 in the United States (compared to 564 US deaths in the 10 years prior) . Due in large part to several extremely large tornado outbreaks in the middle and end of April and in late May, the year is currently on record pace. It is also the deadliest year in the United States since 1936, due mostly to the 322 tornadic deaths that occured during the April 27 outbreak across the Southeastern United States and the 141 tornadic deaths in the 2011 Joplin Tornado.
April 25 – 28
Main article: April 25–28, 2011 tornado outbreak
EF0 EF1 EF2 EF3 EF4 EF5
108 134 51 22 12 3
Tornado damage in Tuscaloosa, Alabama
Between April 25 and 28, a historic tornado outbreak now known as the 2011 Super Outbreak took place across much of the Southern United States as well as parts of the Midwest and Northeast. With over 300 confirmed tornadoes and 317 tornadic fatalities, the outbreak ranks as the worst in United States history. More than three dozen tornadoes were confirmed each day of the event, with 39 on April 25, 55 on April 26, a record 188 in 24 hours on April 27 and 45 on April 28. In terms of violent tornadoes, the event ranks third with 15 EF4/5 storms, behind the 1974 Super Outbreak and 1965 Palm Sunday outbreak.
May 21 – 26
Main articles: May 21–26, 2011 tornado outbreak and 2011 Joplin tornado
EF0 EF1 EF2 EF3 EF4 EF5
43 47 23 5 3 2
On May 21, a small system of thunderstorms began to develop in Brown County, Kansas. At the same time, another system formed to the southeast of Emporia, Kansas. The Brown county system developed into a tornado over Shawnee County, Kansas and touched down over Topeka, Kansas for several seconds causing minor damage nearby. Meanwhile the Emporia system continued to move to the northeast, where an EF3 tornado heavily damaged the town of Reading, Kansas. One person was killed there, several others were injured and at least 20 houses were destroyed. After hitting Topeka it hit several towns including Oskaloosa, Kansas, doing extensive damage to that community. Several other tornadoes touched down in the region that evening.
St. John’s Regional Medical Center after the May 22 Joplin tornado
A moderate risk of severe weather was issued for much of the Midwest south to Oklahoma for May 22. The first tornadic supercell that day developed in the mid-afternoon hours over the western Twin Cities with a swath of damage, especially in and around Minneapolis, Minnesota. An intense tornado also tracked towards Harmony, Minnesota that afternoon and a tornado emergency was issued. Late that afternoon, at about 5:15 pm CDT (2215 UTC), a very large and intense multiple-vortex tornado resulted in catastrophic damage in Joplin, Missouri. Many houses and businesses were flattened and some even were blown away in Joplin, the main hospital was heavily damaged and many people were reported to have been trapped in destroyed houses. The Weather Channel video showed entire communities flattened. Early reports suggest there were at least 125 fatalities., with the death toll rising to at least 141, and another 1,000+ injured.. This tornado was given a rating of EF5.
May 25 (California)
Three tornadoes hit the Sacramento Valley of California, north of Sacramento. One tornado rated at EF-1, struck east of Artois uprooting hundreds of almond trees, and causing damage to farm equipment and roofing materials. Another tornado rated at EF-1, struck south of Durham, uprooting thousands of almond trees, destroying an out building, and damaging a barn. A tornado rated at EF-2, struck northwest of Oroville, causing heavy damage to a ranch and a garage. 
A squall line with embedded tornadoes developed late on May 30. A moderate risk of severe weather was issued for much of the northern Plains, with both tornadoes and extreme damaging winds. At least 18 tornadoes were reported, but they were generally in open country with little damage. A PDS severe thunderstorm watch was issued, as destructive straight-line winds over 90 mph(145 km/h) were reported as they developed into a hybrid derecho.