There are days when the sky suddenly darkens, black clouds billow, strong winds blow, and the temperature drops quickly. Then suddenly, from above, icy white hailstones plunge to the ground. This is hail, a weather phenomenon that is both fascinating to see and potentially dangerous. Have you ever wondered why these \u201cice stones from the sky\u201d appear and fall so quickly? Let\u2019s find the answer together with I-CLC!<\/span><\/p>\n M\u01b0a \u0111\u00e1 l\u00e0 g\u00ec?<\/b><\/p>\n What is hail?<\/b><\/p>\n M\u01b0a \u0111\u00e1 l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng th\u1eddi ti\u1ebft \u0111\u1eb7c bi\u1ec7t, khi t\u1eeb tr\u00ean tr\u1eddi r\u01a1i xu\u1ed1ng nh\u1eefng <\/span>vi\u00ean b\u0103ng <\/b>l\u1ea1nh bu\u1ed1t thay v\u00ec nh\u1eefng gi\u1ecdt m\u01b0a, vi\u00ean b\u0103ng n\u00e0y<\/span> c\u00f3 <\/span>h\u00ecnh c\u1ea7u ho\u1eb7c h\u00ecnh n\u00f3n, <\/b>kh\u00f4ng c\u00e2n \u0111\u1ed1i, <\/span>ch\u00fang c\u00f3 th\u1ec3 nh\u1ecf nh\u01b0 h\u1ea1t \u0111\u1eadu, nh\u01b0ng c\u0169ng c\u00f3 khi to nh\u01b0 qu\u1ea3 tr\u1ee9ng g\u00e0. Ch\u00fang r\u01a1i xu\u1ed1ng m\u1eb7t \u0111\u1ea5t v\u1edbi t\u1ed1c \u0111\u1ed9 r\u1ea5t nhanh, t\u1ea1o ra ti\u1ebfng \u201cl\u1ed9p b\u1ed9p\u201d tr\u00ean m\u00e1i nh\u00e0 v\u00e0 m\u1eb7t \u0111\u01b0\u1eddng.<\/span><\/p>\n Hail is a special weather phenomenon in which icy hailstones fall from the sky instead of raindrops. These hailstones are spherical or cone-shaped and uneven in form. They can be as small as a pea or as large as a chicken egg. They fall to the ground at very high speeds, creating a \u201cpitter-patter\u201d sound on rooftops and roads.<\/span><\/p>\n M\u01b0a \u0111\u00e1 h\u00ecnh th\u00e0nh nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/p>\n How is hail formed?<\/b><\/p>\n M\u01b0a \u0111\u00e1 h\u00ecnh th\u00e0nh b\u00ean trong <\/span>nh\u1eefng \u0111\u00e1m m\u00e2y d\u00f4ng<\/b>, n\u01a1i kh\u00f4ng kh\u00ed <\/span>\u0111\u1ed1i l\u01b0u m\u1ea1nh<\/b>, ngh\u0129a l\u00e0 c\u00f3 s\u1ef1 giao \u0111\u1ed9ng li\u00ean t\u1ee5c gi\u1eefa kh\u00ed n\u00f3ng v\u00e0 l\u1ea1nh. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y th\u01b0\u1eddng x\u1ea3y ra v\u00e0o <\/span>th\u1eddi \u0111i\u1ec3m giao m\u00f9a<\/b>, t\u1eeb m\u00f9a l\u1ea1nh sang n\u00f3ng ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i.\u00a0<\/span><\/p>\n Hail forms inside thunderclouds, where strong convection occurs, meaning there is a continuous movement between warm and cold air. This phenomenon often happens during seasonal transitions, from cold to hot weather or vice versa.<\/span><\/p>\n Khi kh\u00f4ng kh\u00ed n\u00f3ng \u0111\u01b0a gi\u1ecdt n\u01b0\u1edbc l\u00ean \u0111\u1ebfn v\u00f9ng r\u1ea5t l\u1ea1nh trong m\u00e2y (d\u01b0\u1edbi \u201320 \u00b0C), ch\u00fang s\u1ebd <\/span>\u0111\u00f3ng b\u0103ng th\u00e0nh h\u1ea1t b\u0103ng nh\u1ecf<\/b>. Nh\u1eefng h\u1ea1t b\u0103ng n\u00e0y r\u01a1i xu\u1ed1ng g\u1eb7p l\u1edbp m\u00e2y th\u1ea5p h\u01a1n s\u1ebd b\u00e1m th\u00eam n\u01b0\u1edbc l\u1ea1nh d\u01b0\u1edbi 0 \u00b0C, r\u1ed3i l\u1ea1i b\u1ecb gi\u00f3 \u0111\u1ea9y l\u00ean cao, ti\u1ebfp t\u1ee5c \u0111\u00f4ng c\u1ee9ng. C\u1ee9 nh\u01b0 v\u1eady, h\u1ea1t b\u0103ng l\u1edbn d\u1ea7n qua nhi\u1ec1u v\u00f2ng l\u00ean\u00a0 xu\u1ed1ng. Khi ch\u00fang qu\u00e1 n\u1eb7ng, gi\u00f3 kh\u00f4ng n\u00e2ng n\u1ed5i n\u1eefa, ch\u00fang r\u01a1i xu\u1ed1ng \u0111\u1ea5t t\u1ea1o th\u00e0nh <\/span>m\u01b0a \u0111\u00e1<\/b>.<\/span><\/p>\n When warm air carries water droplets up to extremely cold regions within the cloud (below \u201320 \u00b0C), they freeze into small ice pellets. As these ice pellets fall and encounter lower layers of the cloud, they collect more supercooled water, then are pushed back up by the wind and freeze again. This cycle of rising and falling continues, causing the ice pellets to grow larger with each round. When they become too heavy for the wind to lift, they fall to the ground, creating hail.<\/span><\/p>\n M\u01b0a \u0111\u00e1 nguy hi\u1ec3m ra sao?<\/b><\/p>\n How dangerous is hail?<\/b><\/p>\n Nh\u1eefng vi\u00ean m\u01b0a \u0111\u00e1 r\u01a1i t\u1eeb r\u1ea5t cao xu\u1ed1ng v\u1edbi t\u1ed1c \u0111\u1ed9 c\u00f3 th\u1ec3 l\u00ean t\u1edbi <\/span>30-60 m\/gi\u00e2y<\/b>, th\u1eadm ch\u00ed h\u01a1n. Ch\u00fang c\u00f3 th\u1ec3 l\u00e0m v\u1ee1 k\u00ednh, m\u00f3p m\u00e1i t\u00f4n, h\u1ecfng xe c\u1ed9, g\u00e3y c\u00e0nh c\u00e2y v\u00e0 h\u01b0 h\u1ea1i hoa m\u00e0u.<\/span><\/p>\n Hailstones fall from great heights at speeds that can reach 30\u201360 meters per second, or even higher. They can break glass, dent metal roofs, damage vehicles, snap tree branches, and destroy crops.<\/span><\/p>\n M\u01b0a \u0111\u00e1 c\u00f2n g\u00e2y \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn <\/span>th\u1ef1c v\u1eadt<\/b>, l\u00e0m r\u1ee5ng l\u00e1, g\u00e3y th\u00e2n, d\u1eadp n\u00e1t hoa qu\u1ea3 v\u00e0 gi\u1ea3m n\u0103ng su\u1ea5t m\u00f9a v\u1ee5. \u0110\u1ed1i v\u1edbi <\/span>\u0111\u1ed9ng v\u1eadt<\/b>, \u0111\u1eb7c bi\u1ec7t l\u00e0 gia s\u00fac, gia c\u1ea7m nu\u00f4i ngo\u00e0i tr\u1eddi, m\u01b0a \u0111\u00e1 c\u00f3 th\u1ec3 khi\u1ebfn ch\u00fang b\u1ecb th\u01b0\u01a1ng, ho\u1ea3ng s\u1ee3 ho\u1eb7c ch\u1ebft n\u1ebfu kh\u00f4ng k\u1ecbp tr\u00fa \u1ea9n.<\/span><\/p>\n Hail also causes serious damage to plants, stripping leaves, breaking stems, bruising fruits, and reducing crop yields. For animals, especially livestock and poultry kept outdoors, hail can injure, frighten, or even kill them if they cannot find shelter in time.<\/span><\/p>\n![\"\"](\"https:\/\/i-clc.edu.vn\/wp-content\/uploads\/2025\/08\/anh-3-1.jpg\")
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