After a delay of over a week,Southwest Monsoon 2019has finally made onset over Kerala on June 8. As reiterated by Skymet Weather, all the required criteria had met on Friday itself, making conditions favorable for the arrival of the four month longMonsoonseason over the Indian mainland.
The Northern Limit of Monsoon (NLM) is currently passing through Latitude 11°N/ Longitude 60°E, Latitude 11°N/ Longitude 70°E, Amini Divi, Kochi, Madurai, Latitude 11°N/ Longitude 86°E, Latitude 16°N/ Longitude 91°E, and Latitude 20°N/ Longitude 94°E.
All credit goes to the the cyclonic circulation brewing in Southeast Arabian Sea, which is likely to induce alow pressure areaover the same area during the next 24 hours. This system has been primarily responsible for aligning all the required features for bringing theMonsoonin Kerala.
June 6 and 7 had reported good rainfall over the enlisted 14 stations of Kerala, Lakshadweep Islands and Coastal Karnataka, fulling the criteria of at least 60% of the enlisted stations recording rainfall for two consecutive days to the tune of 2.5 mm each.
OLR (Outgoing Longwave Radiation) also continued to be below the threshold value of 200 wm^2 in the area between Latitude 5-10°N and Longitude 70-75°E. Simultaneously, the wind speed has also been blowing to the tune of 30 kmph-40 kmph in the area defined by Latitude 5-10°N and Longitude 70-80°E. Depth of westerlies is also seen up to 600 hpa in the area bounded by Latitude 10°N and Longitude 55-80°E.
Image Credit: en.wikipedia.org
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