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Even as the summer outlook of IMD has predicted a hotter May this year for Odisha, the reality has been starkly different. The State didn't witness any heat wave during the peak summer month of May. The trend is not unique to the State. Heat wave spell has been for only 2 -days even in Rajasthan.
When the Coronavirus second wave is peaking in the country, the weather seems to have relented a bit to give the much needed comfort to the mankind in the country.
The national capital Delhi has recorded less than 40 deg C in majority of days in the hot month of May, reveals the weather review report on May by IMD.
As per the IMD report, no significant heat wave spell was observed during the month over any parts of India in May this year. Like in March and April 2021, heat wave conditions in May 2021 was occasional and also for shorter periods over a very small region.
"During the month no significant heat wave observed across the country, except northwest Rajasthan where it was observed for 2 days on 29 and 30 May 2021. The national Capital Delhi, reported a max temperature of less than 40 deg C for most of the days in May 2021," the report outlined.
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No Harsh May For Odisha
As per IMD data, May 2021 has been the coolest ever for Odisha. The average maximum temperature during the month has remained below 40 deg C, which is the lowest ever in the State's history since 1969. The lowest ever maximum temperature was recorded in the State in the year 1990 (see the image below).
The IMD data for May 2021 shows that except for a few districts in south interior Odisha (Balangir, Nuapada, Kalahandi etc), all other districts in the State have recorded a maximum temperature in the range of 36-38 deg C in the month of May this year.
"The maximum temperature anomaly in western Odisha in May 2021 has been 4 per cent below the normal average maximum temperature recorded during the period of 1981 - 2010," the report outlined.
• Mean temperature over Central India, which includes Odisha, has been the seventh lowest since 1901.
• June 2021 will be cooler in Odisha, predicts IMD June Outlook.
Wettest May In Odisha History
This May, Odisha recorded the highest ever rainfall in State's weather history. A massive 157.5 mm rainfall was received by the State in May, which is around 122 per cent higher than the average amount of rainfall measured in month of May. The average rainfall the month of May receives in the State is estimated at around 68 mm.
Climatic Reasons Behind The 'Wonder May 2021'
Listing out the reasons as why the May this year has been wettest and coolest ever in State's history, the IMD says:
• Odisha along with Bihar, Jharkhand and West Bengal received scattered to fairly widespread rain with isolated thunderstorm activities during some days under the influence of the movement of five number of deep troughs in mid and upper tropospheric westerlies across this region and persistence of lower-level southerly and southeasterly wind convergences from Bay of Bengal.
• Moreover, the Cyclone Yaas induced rainfall has been like the Top-up over the intermittent rainfall during the month in the State.
• Odisha's Chandbali received third highest (288.3) rainfall in the country this May after Ratnagiri in Goa and William Nagar in Assam and Meghalaya.
• Of the 31 stations in country that received highest rainfall this May, as many as 11 stations from Odisha figure in the list.
May 2021 In India's Weather History
• Rainfall over India during the month of May was second highest since 1901. The country as a whole for the month of May 2021 recorded 107.9 mm rainfall, which is 74 % more than its Long Period Average (LPA) of 62 mm.
• The highest ever rainfall was measured in the year 1990 (110.7mm).
• The average maximum temperature over India during May 2021 is fourth lowest with 34.18 ºC since 1901 (i.e. in last 121- years for the month of May, with lowest ever in 1917 when it was 32.68 ºC ) and lowest since 1977 when it was of 33.84 ºC(in last 44-years) .
