Virtual Press Conference on Salient features of Southwest Monsoon 2023 and forecast for Oct-Dec. 2023 at 1600 hrs IST of tomorrow, the 30th September, 2023.

Press Release: A Low Pressure Area lies over Eastcentral Arabian Sea off south Konkan-Goa coasts and another Low Pressure Area lies over Northeast & adjoining Eastcentral Bay of Bengal.

Press Release Current Weather Status and Extended range Forecast for next two weeks (28 Sept-11 Oct 2023)

Press release dated 28.09.2023: A low pressure area is likely to form over Eastcentral & adjoining Northeast Bay of Bengal during next 24 hours.

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Press Release: Current Weather Status and Extended range Forecast for next two weeks (21-28 Sept 2023)

Current Weather Status and Extended range Forecast for next two weeks (7-20 Sept 2023)

Press release: Climate Summary for the month of August 2023

प्रेस विज्ञप्ति: सितंबर 2023 के लिए मासिक वर्षा और तापमान हेतु पूर्वानुमान आउटलुक

PRESS RELEASE DATED 31.08.2023: FORECAST OUTLOOK FOR THE MONTHLY RAINFALL AND TEMPERATURE FOR SEPTEMBER 2023.

Current Weather Status and Extended range Forecast for next two weeks (13-26 July 2023)

WMO VIRTUAL WORKSHOP ON ENVIRONMENTAL SUSTAINABILITY

Climate Summary for the month of June 2023

जुलाई, 2023 के लिए मासिक वर्षा और तापमान आउटलुक

Monthly Rainfall and Temperature Outlook for July, 2023

Press Release: Updated Long Range ForecastOutlook for the 2023Southwest Monsoon Season (June - September) Rainfall and Monthly Rainfall and Temperature for June 2023

प्रेस विज्ञप्ति: 2023 दक्षिण-पश्चिम मॉनसून ऋतु (जून-सितंबर) कीवर्षाके लिए अद्यतन दीर्घावधिपूर्वानुमानदृष्टिकोणऔर

2023 दक्षिण पश्चिम मानसून ऋतु वर्षा के लिए दीर्घावधि पूर्वानुमान

Long Range Forecast for the 2023 Southwest Monsoon Season Rainfall

Spokesperson of IMD to brief press and electronic media on weather forecasting.

Monsoon Information | Onset

Onset & Advance of Monsoon

The guidelines to be followed for declaring the onset of monsoon over Kerala and its further advance over the country are enlisted below:

a) Rainfall

If after 10th May, 60% of the available 14 stations enlisted*, viz. Minicoy, Amini, Thiruvananthapuram, Punalur, Kollam, Allapuzha, Kottayam, Kochi, Thrissur, Kozhikode, Thalassery, Kannur, Kudulu and Mangalore report rainfall of 2.5 mm or more for two consecutive days, the onset over Kerala be declared on the 2nd day, provided the following criteria are also in concurrence.

b) Wind field

Depth of westerlies should be maintained upto 600 hPa, in the box equator to Lat. 10ºN and Long. 55ºE to 80ºE. The zonal wind speed over the area bounded by Lat. 5-10ºN, Long. 70-80ºE should be of the order of 15 – 20 Kts. at 925 hPa. The source of data can be RSMC wind analysis/satellite derived winds.

c) Outgoing Longwave Radiation (OLR)

INSAT derived OLR value should be below 200 wm-2 in the box confined by Lat. 5-10ºN and Long. 70-75ºE.

Northern Limit of Monsoon (NLM)

Southwest monsoon normally sets in over Kerala around 1st June. It advances northwards, usually in surges, and covers the entire country around 15th July. The NLM is the northern most limit of monsoon upto which it has advanced on any given day.