{"id":366165,"date":"2026-01-12T10:05:59","date_gmt":"2026-01-12T09:05:59","guid":{"rendered":"https:\/\/zakrasnejsivimperk.cz\/?p=366165"},"modified":"2026-01-12T10:05:59","modified_gmt":"2026-01-12T09:05:59","slug":"aktuality-pocasi-dnes-v-noci-na-utery-tvorba-ledovky","status":"publish","type":"post","link":"https:\/\/zakrasnejsivimperk.cz\/?p=366165","title":{"rendered":"AKTUALITY: Po\u010das\u00ed dnes, v noci na \u00fater\u00fd tvorba ledovky"},"content":{"rendered":"

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\nDne\u0161n\u00ed r\u00e1no je v t\u00e9to zim\u011b nejmraziv\u011bj\u0161\u00ed, teploty vzduchu v \u010cech\u00e1ch a na z\u00e1pad\u011b Moravy klesly v\u011bt\u0161inou na -12 a\u017e -20 \u00b0C, v\u00fdjime\u010dn\u011b i n\u00ed\u017ee. Na Morav\u011b a ve Slezsku je mr\u00e1z m\u00edrn\u011bj\u0161\u00ed, v\u011bt\u0161inou od -9 do -14 \u00b0C, na Ostravsku je kolem -8 \u00b0C.<\/h6>\n
Dne\u0161n\u00ed den bude posledn\u00ed v\u00fdrazn\u011b mraziv\u00fd, ve\u010der a v noci na \u00fater\u00fd k n\u00e1m od z\u00e1padu za teplou frontou za\u010dne proudit teplej\u0161\u00ed vzduch. Sn\u011bhov\u00e9 sr\u00e1\u017eky tak budou b\u011bhem ve\u010dera a noci na \u00fater\u00fd postupn\u011b od jihoz\u00e1padu p\u0159ech\u00e1zet v mrznouc\u00ed a bude se vytv\u00e1\u0159et ledovka.<\/h6>\n
Tlou\u0161\u0165ka ledovky zejm\u00e9na v p\u00e1su od severoz\u00e1padn\u00edch \u010cech p\u0159es st\u0159edn\u00ed \u010cechy a\u017e na jihoz\u00e1pad Moravy m\u016f\u017ee dos\u00e1hnout 2 a\u017e 5 mm. Na severov\u00fdchod\u011b a v\u00fdchod\u011b \u00fazem\u00ed sr\u00e1\u017eky z\u016fstanou v\u011bt\u0161inou sn\u011bhov\u00e9.<\/h6>\n

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Od dne\u0161n\u00edho ve\u010dera a\u017e do z\u00edt\u0159ej\u0161\u00edho dne se m\u016f\u017ee v \u010cech\u00e1ch na \u0159ad\u011b m\u00edst vyskytnout ledovka. Situace m\u016f\u017ee b\u00fdt velmi nebezpe\u010dn\u00e1, sledujte proto p\u0159\u00edpadnou aktualizaci v\u010dera vydan\u00e9 v\u00fdstrahy.<\/h4>\n

Ledovka – aneb kdy\u017e pr\u0161\u00ed, ale mrzne<\/h6>\n

Pro n\u011bkoho nelogick\u00e1 souvislost. Mr\u00e1z a d\u00e9\u0161\u0165 dohromady? V takov\u00e9m p\u0159\u00edpad\u011b mluv\u00edme o mrznouc\u00edm de\u0161ti, kter\u00fd p\u0159i kontaktu s povrchy, kter\u00e9 jsou pod nulou, okam\u017eit\u011b namrz\u00e1 a tvo\u0159\u00ed se pr\u016fhledn\u00e1 vrstva ledovky. Z\u00e1sadn\u00ed je, kolik mrznouc\u00edch sr\u00e1\u017eek spadne a kdy k situaci dojde (noc vs. rann\u00ed \u0161pi\u010dka). V p\u0159\u00edpad\u011b, \u017ee je to v \u0159\u00e1dech jednotek mm (a lok\u00e1ln\u011b to v nadch\u00e1zej\u00edc\u00ed situaci m\u016f\u017ee b\u00fdt a\u017e 5 mm), hovo\u0159\u00edme o velmi siln\u00e9 ledovce.<\/p>\n

Ledovka se \u010dasto vyskytuje v situac\u00edch, kdy je dlouh\u00e9 zimn\u00ed obdob\u00ed ukon\u010deno od z\u00e1padu teplou frontou (sch\u00e9ma n\u00ed\u017ee). Tepl\u00fd vzduch (leh\u010d\u00ed) se nasouv\u00e1 nad vrstvu chladn\u00e9ho vzduchu p\u0159i zemi a vznik\u00e1 tak teplotn\u00ed inverze. Nav\u00edc na rozhran\u00ed p\u0159i v\u00fdstupn\u00e9m pohybu tepl\u00e9ho vzduchu vznikaj\u00ed sr\u00e1\u017eky. Ve vy\u0161\u0161\u00edch hladin\u00e1ch je teplej\u0161\u00ed vzduch – zde sn\u011bhov\u00e9 sr\u00e1\u017eky p\u0159i jejich p\u00e1du roztaj\u00ed – a padaj\u00ed do vrstvy chladn\u00e9ho vzduchu p\u0159i zemi jako mrznouc\u00ed d\u00e9\u0161\u0165. A je to. Mrzne a pr\u0161\u00ed.<\/p>\n

Toto n\u00e1s \u010dek\u00e1 u\u017e od ve\u010dern\u00edch hodin nejprve na z\u00e1pad\u011b \u010cech. Ve vy\u0161\u0161\u00edch hladin\u00e1ch se za\u010dne oteplovat, p\u0159i zemi, ale z\u016fstane chladn\u00fd vzduch. Nejprve m\u016f\u017ee sn\u011b\u017eit, ale sr\u00e1\u017eky p\u0159ejdou postupn\u011b do mrznouc\u00edch. Pozd\u011bji se to sam\u00e9 stane i ve st\u0159edn\u00edch \u010d\u00e1stech \u010cech a n\u00e1sledn\u011b i v t\u011bch v\u00fdchodn\u011bj\u0161\u00edch. Na Morav\u011b a ve Slezsku ale bude chladn\u00fd cel\u00fd profil atmosf\u00e9ry a tam bude sn\u011b\u017eit.<\/p>\n

M\u011bjte na pam\u011bti, \u017ee \u0159\u00edct p\u0159esn\u011b kdy a kde p\u0159ejde sn\u00edh do mrznouc\u00edch sr\u00e1\u017eek a de\u0161t\u011b a kde bude hranice mezi de\u0161t\u011bm a mrznouc\u00edm de\u0161t\u011bm, to nen\u00ed nikdy zcela mo\u017en\u00e9. Nadch\u00e1zej\u00edc\u00ed situaci ale m\u016f\u017ee komplikovat \u0159ada skute\u010dnost\u00ed:<\/p>\n

1) Povrchy jsou velmi promrzl\u00e9 a oteplovat se budou jen pozvolna – i v p\u0159\u00edpad\u011b, \u017ee na teplom\u011bru u\u017e bude nad nulou, povrchy mohou b\u00fdt st\u00e1le pod.<\/p>\n

2) Ve st\u0159edn\u00edch oblastech \u010cech (st\u0159edn\u00ed \u010cechy, \u00dastecko) m\u016f\u017ee b\u00fdt na\u010dasov\u00e1n vznik ledovky p\u0159esn\u011b do z\u00edt\u0159ej\u0161\u00ed rann\u00ed \u0161pi\u010dky. Pokud bude sr\u00e1\u017eek hodn\u011b, situace m\u016f\u017ee b\u00fdt lok\u00e1ln\u011b velmi kritick\u00e1. Pokud se tak stane, lep\u0161\u00ed je z\u016fstat doma a nikam nevyj\u00ed\u017ed\u011bt ani nechodit (hlavn\u011b star\u0161\u00ed lid\u00e9).<\/p>\n

3) \u0158ada sr\u00e1\u017eek na\u0161t\u011bst\u00ed spadne do sn\u011bhu, silnice a chodn\u00edky ale budou i tak velmi nebezpe\u010dn\u00e9.<\/p>\n

4) Pamatujte, \u017ee silni\u010d\u00e1\u0159i maj\u00ed \u0161anci si poradit se slab\u0161\u00ed ledovkou, proti t\u00e9 siln\u00e9 nemohou d\u011blat t\u00e9m\u011b\u0159 nic.<\/p>\n

N\u00ed\u017ee: Sch\u00e9ma vzniku mrznouc\u00edch sr\u00e1\u017eek, typ sr\u00e1\u017eek ve\u010der a z\u00edtra r\u00e1no dle modelu Aladin (p\u0159esn\u00e1 rozhran\u00ed berte s rezervou) a p\u0159edpov\u011bdn\u00ed profil atmosf\u00e9ry pro Plze\u0148 dnes ve\u010der.<\/p>\n

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FB \u2013\u010cesk\u00fd hydrometeorologick\u00fd \u00fastav<\/span><\/a><\/strong><\/p>\n

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V\u00fdstrahy \u010cesk\u00e9ho hydrometeorologick\u00e9ho \u00fastavu pro regiony a m\u011bsta najdete ZDE<\/a><\/h4>\n
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Informujeme:<\/h6>\n

AKTUALITY: Velmi zaj\u00edmav\u00e9 po\u010das\u00ed n\u00e1s \u010dek\u00e1 hned na za\u010d\u00e1tku t\u00fddne<\/a><\/h4>\n

\u010cESK\u00dd HYDROMETEOROLOGICK\u00dd \u00daSTAV: P\u0159edpov\u011b\u010f po\u010das\u00ed pro ji\u017en\u00ed \u010cechy (11. \u2013 14. ledna)<\/a><\/h4>\n

\u010cESK\u00dd HYDROMETEOROLOGICK\u00dd \u00daSTAV: O v\u00edkendu doraz\u00ed po p\u0159echodn\u00e9m oteplen\u00ed prudk\u00e9 ochlazen\u00ed<\/a><\/h4>\n

\u010cESK\u00dd HYDROMETEOROLOGICK\u00dd \u00daSTAV: V\u00fdhled nebezpe\u010dn\u00fdch jev\u016f na ned\u011bli 11. a pond\u011bl\u00ed 12. ledna<\/a><\/h4>\n
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Dne\u0161n\u00ed r\u00e1no <\/p>\n","protected":false},"author":2,"featured_media":366168,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"footnotes":""},"categories":[179],"tags":[],"jetpack_featured_media_url":"https:\/\/zakrasnejsivimperk.cz\/wp-content\/uploads\/2026\/01\/12\/pocasi-120126-3.jpg","_links":{"self":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/366165"}],"collection":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=366165"}],"version-history":[{"count":1,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/366165\/revisions"}],"predecessor-version":[{"id":366173,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/posts\/366165\/revisions\/366173"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=\/wp\/v2\/media\/366168"}],"wp:attachment":[{"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=366165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=366165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zakrasnejsivimperk.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=366165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}