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35.5% of capacity was recorded at Mona Reservoir on September 16, 2026, a water supply source for Kingston and St. Andrew.
National Water Commission (2026)
National Water Commission. (2026, September 16). Daily reservoir levels. https://enterpriseregistration.nwcjamaica.com/reservoir.php
The share of the United States and Puerto Rico in drought grew by 12.2 percentage points over the past month, reaching 49.77% as of September 15, 2026 (59.37% across the Lower 48 states); the affected population grew 11.2% over the same period, to 103.5 million people, according to the U.S. Drought Monitor.
U.S. Drought Monitor / Drought.gov (2026)
National Integrated Drought Information System (NIDIS). (2026, September 15). National Current Conditions. Drought.gov. https://www.drought.gov/current-conditions
Flash drought continues to worsen across the Southern Plains and the Lower Mississippi River Basin, and this week began affecting parts of the Southeastern United States as well, according to the U.S. Drought Monitor (week of September 9-15, 2026). Conditions improved in the Midwest and showed little change in the West.
U.S. Drought Monitor / Drought.gov (2026)
National Integrated Drought Information System (NIDIS). (2026, September 15). National Current Conditions. Drought.gov. https://www.drought.gov/current-conditions
48% is the probability that Coastal El Niño will reach extraordinary magnitude during December 2026-March 2027 in Peru, while the probability of strong magnitude is 45% and moderate magnitude is 7%.
Comisión Multisectorial encargada del Estudio Nacional del Fenómeno El Niño (ENFEN, 2026)
Comisión Multisectorial encargada del Estudio Nacional del Fenómeno “El Niño” (ENFEN). (2026, 14 de septiembre). Comunicado Oficial ENFEN N.º 16-2026. Instituto del Mar del Perú (IMARPE). https://repositorio.imarpe.gob.pe/items/d1eadaba-d087-487e-a0a2-9f894e37a9f1/full
Between 30 and 155 mm of rain could accumulate in Costa Rica's Northern Zone from September 14 to 20, 2026, the highest forecast range among the country's regions. The probability of an extreme event is low, at about 25%, and forecast uncertainty is also low.
Instituto Meteorológico Nacional de Costa Rica (2026)
Instituto Meteorológico Nacional de Costa Rica. (2026). Pronóstico subestacional: válido del 14 de septiembre al 11 de octubre de 2026. https://www.imn.ac.cr/busqueda?_101_assetEntryId=564589&_101_struts_action=%2Fasset_publisher%2Fview_content&_101_type=content&_101_urlTitle=contenido-pronostico-subestacional&p_p_id=101&p_p_lifecycle=0&p_p_mode=view&p_p_state=maximized
During the four weeks from September 14 to October 11, 2026, the IMN forecasts below-normal rainfall in Costa Rica's Pacific region, Central Valley, and Western Northern Zone. The pattern is expected to be associated with El Niño and stronger-than-usual trade winds.
Instituto Meteorológico Nacional de Costa Rica (2026)
Instituto Meteorológico Nacional de Costa Rica. (2026). Pronóstico subestacional: válido del 14 de septiembre al 11 de octubre de 2026. https://www.imn.ac.cr/busqueda?_101_assetEntryId=564589&_101_struts_action=%2Fasset_publisher%2Fview_content&_101_type=content&_101_urlTitle=contenido-pronostico-subestacional&p_p_id=101&p_p_lifecycle=0&p_p_mode=view&p_p_state=maximized
Coastal El Niño is expected to continue until mid-autumn 2027, with the highest probability of reaching extraordinary magnitude between September 2026 and January 2027; between February and March it would remain between strong and extraordinary.
Comisión Multisectorial encargada del Estudio Nacional del Fenómeno El Niño (ENFEN, 2026)
Comisión Multisectorial encargada del Estudio Nacional del Fenómeno “El Niño” (ENFEN). (2026, 14 de septiembre). Comunicado Oficial ENFEN N.º 16-2026. Instituto del Mar del Perú (IMARPE). https://repositorio.imarpe.gob.pe/items/d1eadaba-d087-487e-a0a2-9f894e37a9f1/full
55% is the probability that El Niño will reach very strong magnitude during December 2026-March 2027, while the probability of strong magnitude is 40% and moderate magnitude is 5%.
Comisión Multisectorial encargada del Estudio Nacional del Fenómeno El Niño (ENFEN, 2026)
Comisión Multisectorial encargada del Estudio Nacional del Fenómeno “El Niño” (ENFEN). (2026, 14 de septiembre). Comunicado Oficial ENFEN N.º 16-2026. Instituto del Mar del Perú (IMARPE). https://repositorio.imarpe.gob.pe/items/d1eadaba-d087-487e-a0a2-9f894e37a9f1/full
Argentina's first-crop (early-planted) soybean recorded above-average yields in 91% of the farming seasons analyzed under El Nino influence, according to the AgroENSO tool developed by INTA and GEA-CONICET, presented as part of the 2026/27 season outlook.
INTA Argentina (2026)
Instituto Nacional de Tecnologia Agropecuaria (INTA). (2026, September 11). Administrar riesgos y transformar mas agua en mas produccion. Argentina.gob.ar. https://www.argentina.gob.ar/noticias/administrar-riesgos-y-transformar-mas-agua-en-mas-produccion
Argentina's national maize yield exceeded the historical average in 10 of the 12 farming seasons analyzed under El Nino influence, according to the AgroENSO tool developed by INTA and GEA-CONICET, presented as part of the 2026/27 season outlook.
INTA Argentina (2026)
Instituto Nacional de Tecnologia Agropecuaria (INTA). (2026, September 11). Administrar riesgos y transformar mas agua en mas produccion. Argentina.gob.ar. https://www.argentina.gob.ar/noticias/administrar-riesgos-y-transformar-mas-agua-en-mas-produccion
