Record breaking March heat: Midwest USA and Canada
Posted 22 March 2012 - 18:25
Cheers - John
I was not only talking about the weather, but also about the landscapes. I love seeing beautiful ones, and being emotionally "taken" by them.
Who could resist to this?:
Sorry for putting a picture, I can't help doing that! hehe
I agree with you Dave, it's completely insane, I'd say even for the whole of Europe!
This post has been edited by MorganeLanesle: 22 March 2012 - 18:26
Posted 23 March 2012 - 09:27
- Chicago's average temperature for the first 21 days of March is 53.5°. Not only would this shatter the record for the warmest March ever, it would tie for the 7th warmest April ever in Chicago. Similarly for Rockford, the average temperature for the first 21 days of March would rank above the 19th warmest April.
Posted 23 March 2012 - 16:35
The convoluted jet stream pattern that brought Summer in March conditions to the Eastern U.S. and Canada is also bringing record snows to Oregon. Eugene, Oregon picked up 7.5 inches of snow yesterday, the largest snowstorm this late in the year on record. The previous record was a 7.6" snow storm on March 5 - 7, 1951. Snow amounts as high as 32" have been recorded in the Oregon Cascades over the past few days.
A loop in the jet stream has created a large upper-level ridge of high pressure that is stuck in place over the Eastern U.S., and large upper-level trough of low pressure over the Western U.S. Since the jet stream acts as the boundary between cold air to the north and warm air to the south, and the large loop in the jet places its axis far to the north of the eastern U.S., summer-like warmth has developed over the eastern half of the U.S. Conversely, colder than average temperatures have developed over the western third of the U.S. behind the southwards-dipping loop of the jet stream.
This jet stream pattern was too extreme to be stable, and the big loop over the Western U.S. has broken off to form a giant eddy. The resulting area of low pressure is known as a "cut-off low", because it is cut off from the jet stream. The cut-off low is drifting slowly eastwards, and will bring an end to "Summer in March" over the Eastern half of the U.S. by Friday.
Posted 23 March 2012 - 17:36
25.4°C at St John (New Brunswick), the previous all-time record for March being 17.5°C, and for April being 22.8°C (!).
Not only, St John beat its own record, but it did by 8°C, exceeded the 20°C-line, and even the warm day-line, 25°C!
Posted 24 March 2012 - 09:02
Some of these anomalies are very scary indeed. Normally one would expect to break records by tenths of one degree, not multiples of ten.
The biggest maximum temperature anomalies in the UK date by date tend to be around the 13C to 16C difference, for instance the top UK temperature on 10th August 2003 of 38C was near 16C. Similar anomalies were recorded during the last days of June 1976, when temperatures of up to 36C were recorded, this heatwave being an in-situ developer over very dry ground.
One can only speculate as to how such anomalies elsewhere could affect life, especially at the hottest time of the year. For instance, taking the Pellston anomaly of 48F, (27C), in London in July would yield a temperature of near 50C (120F), a temperature that would have the potential to kill tens, if not hundreds of thousands, plus a severe drain on elecrical energy as air conditioning units strained to cope with the extra demand.
Of course our temperatures are generally attenuated by being surrounded by cooler seas, and more often than not, some rainfall at relatively frequent intervals, but large conurbations on the Continent do not have this luxury. It is worth remembering that the heat-wave of 2003 across Europe allegedly killed tens of thousands, a more approximate number eludes me just now, but that was with temperatures into the low fourties.
As a leveller to the above stats, it might be worth pointing out, that given max sunshine, a lapse rate as seen during the summer of 1976, and thickness values as seen during the heatwaves of Augusts 1990 and 2003, would yeald a theoretical max temp here in the UK of around 42C.
Food for thought.
Posted 26 March 2012 - 09:16
Posted 26 March 2012 - 21:01
By Dr. Jeff Masters
Published: 1:13 PM GMT on March 26, 2012
After a week of temperatures in the 70s and 80s last week, it was a rude awakening for Michigan this morning, as temperatures across all but the extreme southern portions of the state dropped below freezing. Tonight, far colder temperatures in the low to mid-20s are expected across the entire state, and frosts and freezes are also expected in all of Ohio, plus portions of Indiana, Kentucky, Wisconsin, West Virginia, Virginia, Pennsylvania, Delaware, North Carolina, Maryland, Washington D.C., and New Jersey. A hard freeze (temperatures below 28°F ) will cause widespread damage to flowering plants fooled into blooming by last week's unprecedented "Summer in March" heat wave. Temperatures as hot as 90° hit Michigan last week, and the National Weather Service in Detroit called the "Summer in March" heat wave "perhaps the most anomalous weather event in Michigan since climate records began 130 years ago."