Key, Florida, United States, eye of the Labor Day Hurricane, 2 September 1935. While other landfalling tropical cyclones potentially had lower pressures, data is vague from areas other than the Atlantic basin, especially before the invention of weather satellites. Most intense landfall (estimated): 884 hPa (26.10 inHg); Rakiraki District, Viti Levu, Fiji, during Cyclone Winston, 20 February 2016. Although no official land pressure readings were recorded at the landfall site, it is estimated the Winston made landfall with the aforementioned pressure. Most precipitation Most precipitation from a single tropical storm: ; Commerson, Réunion, during Cyclone Hyacinthe in January 1980. Other severe weather Hail Heaviest officially recorded: ; Gopalganj District, Bangladesh, 14 April 1986. Largest diameter officially measured: diameter, circumference; Vivian, South Dakota, 23 July 2010. Largest circumference officially measured: circumference, diameter; Aurora, Nebraska, 22 June 2003. Lightning Longest lightning bolt: on 29 April 2020 in the southern United States. Longest duration for a single lightning flash: 17.1 seconds on 18 June 2020 in Uruguay and northern Argentina. Ultraviolet index Highest ultraviolet index measured: On 29 December 2003, a UV index of 43.3 was detected at Chile/Bolivia's Licancabur volcano, at altitude. A light-skinned individual in such conditions may experience moderate sunburn in as little as 4 minutes. Other categories Highest air pressure ever recorded [above 750 meters (2,461 feet)]: 1,084.8 hPa (32.03 inHg); Tosontsengel, Zavkhan, Mongolia, 19 December 2001. This is the equivalent sea-level pressure; Tosontsengel is located at above sea level. The highest adjusted-to-sea-level barometric pressure ever recorded (below 750 meters) was at Agata, Evenhiyskiy, Russia (66°53'N, 93°28'E, elevation: 261 m (856.3 ft)) on 31 December 1968 of 1,083.3 hectopascals (hPa) (31.99 inHg). The discrimination is due to the problematic assumptions (assuming a standard lapse rate) associated with reduction of sea level from high elevations. See also Weather of 2013 Extremes on Earth List of countries and territories by extreme temperatures List of extreme temperatures in Canada List of snowiest places in the United States by state U.S. state and territory temperature extremes United Kingdom weather records Weather extremes in Canada Climate change Notes References External links National Climate Extremes Committee Global Weather & Climate Extremes (Arizona State University) Weather and Climate Extremes from US Army Corps of Engineers