A dramatic flip from severe, even record-setting, cold to unusual warmth has happened over that part of western Asia centered upon the west of Siberian Russia.
The best illustration of this marked shift that has unfolded since the dead of winter may be found in the plains between Novosibirsk and Yekaterinburg.
The city of Omsk suffered an extreme, harsh winter. The coldest month, January, was below normal by 6.8 C, or 12.9 F. The actual mean monthly temperature was a bitter -25.0 C, or -12.9 F.
But the cold broke in March and, in mid-April, unusual warmth blossomed over a vast swath at the heart of Eurasia. In Omsk, this warming culminated on Tuesday in a high of 30.0 C, or 86 F--a hot day even in July. For April as a whole, the mean temperature as of Tuesday rose 5.7 C/10.2 F above normal.
Smaller Tara, lying north of Omsk, suffered a January 8.2 C/14.7 F colder than normal, but the big mid-April spike brought the mean monthly temperature as of Tuesday to 4.9 C/8.9 F above normal.
The April mean monthly temperature has been as much as 7.1 C, or 12.7 F, above normal, this being registered in the city of Yekaterinburg, east of the Ural Mountains.
Interestingly, this week's spike in warmth over western Siberia and neighboring Siberia culminated in a high of 32.1 C, or about 90 F, on Tuesday in the town of Kyuchi, near the Kazakh border.
The plum rains are known as "meiyu" in China, the "baiyu" or "tsuyu" in Japan, and the "jangma" in the Koreas. The heart of the plum rain season stretches from early June to mid-July, with a tendency to shift south to north across the affected area.
In the wake of the mid-June cloudbursts, most of Pakistan to northwestern India last week saw a return to dry, hot weather typical of the weeks leading up to the Monsoon onset. It was as if the Monsoon withdrew to its "normal" position for the latter half of June.
The 38.5 degree C (101 degrees F) reading Tuesday in Ajaccio, Corsica, may have been tops in Europe.
Monsoon Onset was June 13th, 2013, in Delhi, almost two weeks earlier than average. The June 15th onset at Karachi and Islamabad was more like three week ahead of schedule.
In Pakistan, hit-or-miss downpours missed the Sindh capital, Karachi. One did hit Pad Idan, where it left 60 mm of rain Wednesday. This was more than 20 times greater than the normal June rainfall.
It is still possible that this scenario is over wrought as to the intensity and spread of rain in Pakistan and northwestern India. However, it is the hunch of the present forecaster that some very unusual weather is going to unfold in the Subcontinent during the next week!