During the second half of January and early February 2012, bitterly cold air originating from Siberia killed hundreds of people across Europe.
According to the World Meteorological Organization, lows plummeted to as low as minus 30 degrees C in eastern European countries of Latvia, Belarus, northeastern Poland and Ukraine, while lows fell to minus 10 to minus 15 degrees C in central and western Europe.
Pictures from Europe's Deep Freeze:
The seafront is frozen in the Adriatic coastal town of Senj, Croatia, Tuesday, Feb. 7, 2012. Europeans across the continent have been battling more than a week of extreme weather, with thousands still trapped by snow in remote, mountain villages in the Balkans; hundreds - most of them homeless - dead after temperatures hit as low as minus 33 Fahrenheit (minus 36 Celsius); and authorities now facing the prospect of flooding caused by melting snow. (AP Photo/Darko Bandic)
A lot of snow fell in Szeged, Hungary. Photo submitted to AccuWeather.com Facebook fan Spf S., on Sunday, Feb. 5, 2012.
Photo from Ancona, Italy after three days of snow on Sunday, Feb. 5, 2012. Photo from AccuWeather.com Facebook fan Massimiliano R.
Photo of snow in Slovenia on Monday, Feb. 6, 2012, from AccuWeather.com Facebook fan Marjan B.
Photo of heavy snow, 110 cm, in Sarjevo, Bosnia, on Monday, Feb. 6, 2012, from AccuWeather.com Facebook fan Jasmin B.
A Bosnian man walks on snow-covered road in the village of Breteljevici, near Kladanj, 100 kilometers north of Sarajevo, Bosnia, Thursday, Feb. 2, 2012. Some Bosnian villages have had no electricity for days as crews work around-the-clock trying to fix power lines affected by heavy snow and freezing temperatures. (AP Photo/Amel Emric)
Nearly the same setup for tornadoes that focused on Oklahoma Monday is targeting north central Texas Tuesday afternoon.
Severe storms, some capable of producing tornadoes, will threaten communities across northern and eastern Texas, southeastern Oklahoma, northwestern Louisiana and Arkansas on Tuesday.
The same storm system responsible for producing violent thunderstorms in Oklahoma recently will reach the Atlantic Seaboard Thursday.
The atmospheric severe weather engine began firing on all cylinders this past weekend and reached full speed Monday over Oklahoma.
Preliminary reports are calling it an EF-4 tornado that has caused numerous fatalities and injuries in Moore, Okla.
Several tornadoes touched down from Oklahoma to Iowa, including near Wichita, Kan., and Oklahoma City, on Sunday.
Memphis, TN (1983)
Freak lightning bolt strikes a man in his neck, runs down his spine, and passes out of a pocket containing keys. The bolt then struck 2 other men nearby before also hitting a tree the men were standing under at a golf course. Miraculously all three men survived.
Texas County, OK (1937)
Severe dust storm called "Black Blizzard" visibility near zero for 10 minutes.
Ohio Valley (1860)
Tornado swarm in Ohio Valley hit Louisville, KY, Cincinnati, OH, Chilicothe, OH, and Marietta, OH. Damage totalled $1 million; 4 people killed in Cincinnati.