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Time of India
27-05-2025
- Climate
- Time of India
TNAU forecasts normal southwest monsoon in Tamil Nadu
COIMBATORE: Tamil Nadu Agricultural University (TNAU) has forecast a normal southwest monsoon from June to September for most districts in Tamil Nadu this year. Near normal rainfall is expected in Coimbatore, Tirupur, Karur, Namakkal, Tenkasi, Tirunelveli, Tuticorin and Kanyakumari districts, according to TNAU. As per the seasonal forecast released by the varsity on Tuesday, Chennai would receive 430 mm of rainfall against its normal rainfall of 440 mm, while Coimbatore would receive 185 mm of rainfall against 210 mm between June and September 2025. The forecast was developed based on the Southern Oscillation Index and Sea Surface Temperature values of the Pacific and Indian Oceans using Australian Rainman International V43 software at the Agro Climate Research Centre of TNAU, said a statement. The forecast said Madurai would receive 298 mm of rainfall against its normal average of 325 mm and Trichy would receive 260 mm against 277 mm. Among all the districts in TN, the Nilgiris is expected to receive the highest rainfall of 860 mm, followed by Kancheepuram (462 mm) and Chengalpet (450 mm). Tuticorin would receive the lowest rainfall of 59 mm against its normal of 67 mm. Tirupur and Erode are forecast to receive 130 mm and 245 mm of rainfall, respectively, while Salem would receive 410 mm, according to TNAU.
The Hindu
27-05-2025
- Climate
- The Hindu
TNAU releases district-level rainfall forecast for Southwest monsoon
Tamil Nadu Agricultural University (TNAU), Coimbatore, on Tuesday released the district-level seasonal rainfall forecast for Southwest Monsoon season, 2025 (June to September). The rainfall forecast was calculated based on the Southern Oscillation Index and Sea Surface Temperature values of Pacific and Indian Oceans by using Australian Rainman International V.4.3. software at the university's Agro Climate Research Centre. The TNAU presented its forecast at 60% probability level. Normal rainfall (±10 per cent deviation from long term rainfall) is expected in most of the districts in Tamil Nadu. Near normal rainfall (-10 per cent deviation from the long-term rainfall) is expected in Coimbatore, Tiruppur, Karur, Namakkal, Thenkasi, Tirunelveli, Tutucorin and Kanyakumari districts of Tamil Nadu. The predicted rainfall (in mm) have been grouped under different zones. North Eastern Zone (Normal rainfall in mm, predicted rainfall, and percent deviation in brackets): Chennai (440, 430, -2), Chengalpattu (450, 450, 0), Cuddalore (360, 370, 3), Kallakurichi (410, 385, -6), Kancheepuram (479, 462, -4), Ranipet (450, 430, -4), Tiruvallur (456, 440, -4), Tirupathur (416, 400, -4), Tiruvannamalai (449, 449, 1), Villpuram (405, 405, -5), Vellore (453, 422, -7). West zone: Coimbatore (210, 185, -12), Erode (260, 245, -6), Tiruppur (151, 130, -14). North West zone: Dharmapuri (392, 380, -3), Krishnagiri (375, 377, 1), Namakkal (336, 300, -11), Salem (421, 410, -3). Cauvery Delta zone: Ariyalur (377, 355, -6), Karur (199, 175, -12), Mayiladuthurai (295, 300, 2), Nagapattinam (279, 267, -4), Perambalur (279, 269, -4), Thanjavur (314, 315, 0), Tiruvarur (302, 280, -7), Tiruchirapalli (277, 260, -6). Southern Zone: Dindigul (308, 296, -4), Madurai (325, 298, -8), Pudukkottai (330, 326, -1), Ramanathapuram (135, 135, 0), Sivaganga (417, 421, 1), Theni (215, 205, -5), Tenkasi (174, 150, -14), Tuticorn (67, 59, -12), Tirunelveli (128, 108, -16), Virudhunagar (190, 175, -8). Hilly Zone: The Nilgiris (875, 860, -2).
Scoop
02-05-2025
- Climate
- Scoop
Warmer Nights Ahead With Upper North Wetter- NIWA's Seasonal Climate Outlook For May To July 2025
Forecast – NIWA Seasonal air temperatures are expected to be above average across all New Zealand regions, says NIWA meteorologist Principal Scientist – Forecasting & Media, Chris Brandolino. Wetness is favoured for the northern North Island, with dryness a possibility for the western part of the North Island as well as western South Island, according to the latest Seasonal Climate Outlook for May to July 2025, issued by NIWA. Seasonal air temperatures are expected to be above average across all New Zealand regions, says NIWA meteorologist Principal Scientist – Forecasting & Media, Chris Brandolino. ''Low pressure systems forming north of the country are expected to affect New Zealand and may lead to heightened risks for heavy rainfall events. In the absence of strong large-scale climate drivers, local and regional influences – inherently less predictable – are likely to dominate New Zealand's climate over the forecast period.' NIWA Outlook: May – July 2025 Outlook Summary: Neutral El Niño – Southern Oscillation (ENSO) conditions are now present in the tropical Pacific. The Southern Oscillation Index (SOI), and sea surface temperatures (SSTs) in the central Pacific (in the Niño 3.4 region), which are standard indices for monitoring ENSO, are in the neutral range. International guidance indicates about an 80% chance for the tropical Pacific to remain in an ENSO-neutral state over the forecast period. However, intermittent La Niña-like atmospheric patterns may still occur over the next three months. For New Zealand, higher than normal atmospheric pressure is expected to the east of the country, leading to northeasterly flow anomalies that may shift to a more northerly direction towards the end of the three-month period. Low pressure systems forming north of the country are expected to affect New Zealand and may lead to heightened risks for heavy rainfall events. Seasonal air temperatures are expected to be above average across all New Zealand regions, with particularly warm overnight temperatures driving this trend. May – July rainfall totals are expected to be above normal for the north of the North Island. For the western regions of both the North and South Islands, rainfall is forecast to be near normal or below normal. For the rest of New Zealand, near normal or above normal seasonal rainfall totals are about equally likely. Sub-seasonal, or monthly, projections of rainfall and dryness are updated daily through the NIWA35 forecast. Ocean waters around New Zealand are currently much warmer than average, with extended offshore areas experiencing Marine Heat Wave (MHW) conditions. Global climate forecasts indicate that SSTs in the New Zealand region are likely to remain overall higher than average for the next three-month period, although the intensity may decrease. During May – July 2025, near normal soil moisture levels and river flows are expected in the north and east of the North Island. In the north and east of the South Island, near normal or above normal soil moisture and river flows are forecast. In the west of both islands, normal or below normal soil moisture are forecast, while river flows are anticipated to be in the near normal range in the west of the South Island, and below normal in the west of the North Island.
Scoop
02-05-2025
- Climate
- Scoop
Warmer Nights Ahead With Upper North Wetter- NIWA's Seasonal Climate Outlook For May To July 2025
Wetness is favoured for the northern North Island, with dryness a possibility for the western part of the North Island as well as western South Island, according to the latest Seasonal Climate Outlook for May to July 2025, issued by NIWA. Seasonal air temperatures are expected to be above average across all New Zealand regions, says NIWA meteorologist Principal Scientist - Forecasting & Media, Chris Brandolino. ""Low pressure systems forming north of the country are expected to affect New Zealand and may lead to heightened risks for heavy rainfall events. In the absence of strong large-scale climate drivers, local and regional influences - inherently less predictable - are likely to dominate New Zealand's climate over the forecast period." NIWA Outlook: May – July 2025 Outlook Summary: Neutral El Niño – Southern Oscillation (ENSO) conditions are now present in the tropical Pacific. The Southern Oscillation Index (SOI), and sea surface temperatures (SSTs) in the central Pacific (in the Niño 3.4 region), which are standard indices for monitoring ENSO, are in the neutral range. International guidance indicates about an 80% chance for the tropical Pacific to remain in an ENSO-neutral state over the forecast period. However, intermittent La Niña-like atmospheric patterns may still occur over the next three months. For New Zealand, higher than normal atmospheric pressure is expected to the east of the country, leading to northeasterly flow anomalies that may shift to a more northerly direction towards the end of the three-month period. Low pressure systems forming north of the country are expected to affect New Zealand and may lead to heightened risks for heavy rainfall events. Seasonal air temperatures are expected to be above average across all New Zealand regions, with particularly warm overnight temperatures driving this trend. May – July rainfall totals are expected to be above normal for the north of the North Island. For the western regions of both the North and South Islands, rainfall is forecast to be near normal or below normal. For the rest of New Zealand, near normal or above normal seasonal rainfall totals are about equally likely. Sub-seasonal, or monthly, projections of rainfall and dryness are updated daily through the NIWA35 forecast. Ocean waters around New Zealand are currently much warmer than average, with extended offshore areas experiencing Marine Heat Wave (MHW) conditions. Global climate forecasts indicate that SSTs in the New Zealand region are likely to remain overall higher than average for the next three-month period, although the intensity may decrease. During May – July 2025, near normal soil moisture levels and river flows are expected in the north and east of the North Island. In the north and east of the South Island, near normal or above normal soil moisture and river flows are forecast. In the west of both islands, normal or below normal soil moisture are forecast, while river flows are anticipated to be in the near normal range in the west of the South Island, and below normal in the west of the North Island. Advertisement - scroll to continue reading Using Scoop for work? Scoop is free for personal use, but you'll need a licence for work use. This is part of our Ethical Paywall and how we fund Scoop. Join today with plans starting from less than $3 per week, plus gain access to exclusive Pro features. Join Pro Individual Find out more
