setting a new record high temperature for the continental United States, and given that the U.S. is the world's tornado capital, and given the wailing of paid political shills like Joe Romm, Brad Johnson (who tried to get traction for a Twitter meme of #poisonedweather going) and weepy Bill McKibben, that tornadoes are exacerbated by global warming, you'd think Nature would have come through for them in July. By their twisted "logic", with record heat, it would naturally come to pass that July had a record number of tornadoes, right? As John Belushi would say: "But nooooooo...."
It's another CLIMATE FAIL, bring out Roger Pielke Jr.'s handy BS button, because Nature has just blown these idiots a raspberry. The only "poison" is their message. - Anthony
Guest post by Paul Homewood from Not a Lot of People Know That
NOAA has now released preliminary numbers for US tornadoes in July, showing that the remarkably quiet season seen up to June has continued. As the graph above indicates, April through July are by far the busiest months, so it is unlikely that the rest of the year will make any significant difference to the overall trend.
On July 28th, a tornado touched down along the northeastern slope of Mount Evans in Colorado at an elevation of approximately 11,900 feet above sea level. The location was remote and no structural damage or injuries were reported. The tornado was uncommon due to the high elevation of its occurrence, marking the second highest elevation at which a tornado has been observed in the nation. Mountainous terrain and high elevations typically create unfavorable conditions for tornadoes, making these events rare, but not impossible. The highest elevation of an observed tornado in the country occurred in July 2004 at 12,000 feet above sea level in California's Sequoia National Park.
Confirmed numbers for March
The SPC have confirmed the actual numbers for March, with a total of 82 tornadoes of EF-1 classification or greater. As in February, this was unusually high, comparing with the 1970-2011 March average of 42. Since 1950, the March total ranks 4th highest, behind 1976, 1961 and 1991. The total for 1976 of 147 was a good deal higher though.
There were 81 confirmed tornadoes in April, close to the 1970-2011 average of 85.
but do give some clues.
How do tornadoes form? The classic answer - "warm moist Gulf air meets cold Canadian air and dry air from the Rockies" - is a gross oversimplification. Many thunderstorms form under those conditions (near warm fronts, cold fronts and drylines respectively), which never even come close to producing tornadoes. Even when the large-scale environment is extremely favourable for tornadic thunderstorms, as in an SPC "High Risk" outlook, not every thunderstorm spawns a tornado. The truth is that we don't fully understand.Now take a look at the next two temperature maps from GISS for April, first last year and then this year.