{"id":7826,"date":"2021-02-26T15:36:17","date_gmt":"2021-02-26T14:36:17","guid":{"rendered":"https:\/\/blog.laviny.sk\/?p=7826"},"modified":"2021-03-01T09:21:48","modified_gmt":"2021-03-01T08:21:48","slug":"z-arktidy-na-saharu-pocasie-sneh-a-laviny-20-02-2021-26-02-2021","status":"publish","type":"post","link":"https:\/\/blog.laviny.sk\/?p=7826","title":{"rendered":"Z Arkt\u00eddy na Saharu – Po\u010dasie, sneh a lav\u00edny (20.02.2021 – 26.02.2021)"},"content":{"rendered":"\n

Studen\u00fd arktick\u00fd vzduch zo severu pre zmenu vystriedalo ju\u017en\u00e9 pr\u00fadenie s v\u00fdrazn\u00fdm oteplen\u00edm. Spolu s n\u00edm do na\u0161ej oblasti dovialo aj prach a piesok zo saharskej oblasti. Ten je s\u00edce nepatrne vidite\u013en\u00fd vo\u013en\u00fdm okom v podobe oparu nad horizontom, ale na zem nedopadol a sneh tak zostal \u017eiarivo biely. Na to aby piesok z ovzdu\u0161ia dopadol na zem s\u00fa potrebn\u00e9 zr\u00e1\u017eky. Tie ale bohu\u017eia\u013e, a mo\u017eno aj chvalabohu, tento t\u00fd\u017ede\u0148 nepri\u0161li. U\u017e\u00edva\u0165 sme si tak mohli v\u00fdrazn\u00e9 jarn\u00e9 po\u010dasie, opa\u013eovanie, ob\u010dasn\u00e9 firny ale hlavne mokr\u00fd ka\u0161ovit\u00fd sneh a mno\u017estvo splazov a mokr\u00fdch lav\u00edn. <\/p>\n\n\n\n

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Opar so saharsk\u00fdm pieskom nad Liptovskou kotlinou (25.02.2021)<\/figcaption><\/figure>\n\n\n\n

Tak ako na hojda\u010dke, aj po\u010dasie sa n\u00e1m prehuplo z jednej strany na druh\u00fa. Minul\u00fd t\u00fd\u017ede\u0148 sa kon\u010dil v znamen\u00ed siln\u00e9ho vetra, chladu a novej snehovej n\u00e1dielky. V pohoriach pripadlo do 30 cm snehu, ktor\u00fd bol ale pov\u00e4\u010d\u0161ine previaty na z\u00e1vetern\u00e9 svahy a to juhov\u00fdchodn\u00fdch orient\u00e1ci\u00ed. Dlho sme sa v\u0161ak nete\u0161ili. Cez v\u00edkend k n\u00e1m dorazilo v\u00fdrazn\u00e9 oteplenie, ktor\u00e9 za\u010dalo postupn\u00fdm pr\u00faden\u00edm vo vy\u0161\u0161\u00edch vrstv\u00e1ch. Zatia\u013e \u010do na Lomnickom \u0161t\u00edte sa behom 24 hod\u00edn oteplilo o 12\u00b0C, na Kr\u00ed\u017enej vo Ve\u013ekej Fatre to i\u0161lo postupnej\u0161ie a otep\u013eovalo sa denne o pribli\u017ene 5\u00b0C. Pri\u010dom ich v\u00fd\u0161kov\u00fd rozdiel je nie\u010do viac cez 1000 metrov. Z po\u010diatku to vyzeralo s\u013eubne a za\u010d\u00ednali sme sa te\u0161i\u0165 na firnov\u00e9 ly\u017eova\u010dky. \u017dia\u013ebohu bolo oteplenie nato\u013eko v\u00fdrazn\u00e9, \u017ee v noci takmer nemrzlo ani v najvy\u0161\u0161\u00edch poloh\u00e1ch. Sneh sa tak nemal kedy prerobi\u0165 na firn a tak sa v poloh\u00e1ch do 2000 m.n.m. takmer nevytvoril. Jedin\u00fd firn sa tak dal n\u00e1js\u0165 hlavne vo Vysok\u00fdch Tatr\u00e1ch, kde pomerne chladn\u00fd vietor t\u00fato snehov\u00fa pokr\u00fdvku pretv\u00e1ral.<\/p>\n\n\n\n

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Na teplotn\u00fdch grafoch vy\u0161\u0161ie m\u00f4\u017eeme vidie\u0165, \u017ee teplota len ve\u013emi m\u00e1lo atakovala m\u00ednusov\u00e9 teploty a to aj v no\u010dn\u00fdch hodin\u00e1ch. Za n\u00e1sledok to malo mno\u017estvo splazov a lav\u00edn z mokr\u00e9ho snehu. V\u00e4\u010d\u0161ina z nich spadla na ju\u017en\u00fdch svahoch v poobedn\u00fdch hodin\u00e1ch, kedy vo\u013en\u00fd sneh z poslednej peri\u00f3dy sne\u017eenia zvlhol nato\u013eko, \u017ee u\u017e sa \u010falej neudr\u017eal na svojom mieste. Typick\u00fd znak t\u00fdchto lav\u00edn je ich bodov\u00fd odtrh. Teda sta\u010d\u00ed len mal\u00e1 mokr\u00e1 gu\u013ea odtopen\u00e1 od vyhriatej skaly, ktor\u00e1 dok\u00e1\u017ee vyvola\u0165 lav\u00ednu aj v\u00e4\u010d\u0161\u00edch rozmerov. Mo\u017eno niektor\u00ed z V\u00e1s zachytili na soci\u00e1lnych sie\u0165ach lav\u00ednu z Lomnick\u00e9ho \u0161t\u00edtu. Inicioval ju ly\u017eiar v horn\u00fdch parti\u00e1ch ako mal\u00fd nevinne vyzeraj\u00faci splaz. Ten ale spustil \u010fal\u0161iu lav\u00ednu na slnkom nasvietenej pl\u00e1ni. V\u00fdsledkom bola mas\u00edvna mokr\u00e1 lav\u00edna valiaca sa do \u017e\u013eabu pod Lomnick\u00fdm \u0161t\u00edtom, takzvan\u00e9ho Kart\u00e1riku. Podobne vyzeraj\u00facu situ\u00e1ciu sme zaznamenali aj v mas\u00edve Slavkovsk\u00e9ho \u0161t\u00edtu vo Vysok\u00fdch Tatr\u00e1ch a z Pr\u00edslopu v Z\u00e1padn\u00fdch Tatr\u00e1ch.<\/p>\n\n\n\n

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Ako sme u\u017e p\u00edsali, znakom lav\u00edn z mokr\u00e9ho snehu s\u00fa typick\u00e9 bodov\u00e9 odtrhy, ve\u013ek\u00e9 tvrd\u00e9 hrudy v n\u00e1nose a ich relat\u00edvne pomal\u00e1 r\u00fdchlos\u0165. Zdanie ale klame. Lav\u00edna m\u00e1 ve\u013ek\u00fa hmotnos\u0165 a demoli\u010dn\u00fd charakter. V jej dr\u00e1he zost\u00e1va hlbok\u00e1 br\u00e1zda a zastavi\u0165 ju nedok\u00e1\u017ee takmer ni\u010d. Ve\u013ek\u00fd pozor si preto treba d\u00e1va\u0165 aj na prv\u00fd poh\u013ead ne\u0161kodn\u00e9 vyzeraj\u00face tzv. kol\u00e1\u010de alebo slim\u00e1ky, tvoriace sa z odt\u00e1paj\u00faceho sa snehu, alebo vypad\u00e1vaj\u00face z pod ly\u017e\u00ed pri zjazdoch a v\u00fd\u0161\u013eapoch.<\/p>\n\n\n\n

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Z t\u00fdchto d\u00f4vodov je teda jasn\u00e9, \u017ee vo v\u0161etk\u00fdch na\u0161ich pohoriach bol z pr\u00edchodom oteplenia vyhl\u00e1sen\u00fd 3. stupe\u0148 lav\u00ednov\u00e9ho nebezpe\u010denstva. Je pravda, \u017ee sneh s oteplen\u00edm sad\u00e1 a stabilizuje sa. No to iba v pr\u00edpade, \u017ee by mu aspo\u0148 v no\u010dn\u00fdch hodin\u00e1ch pomohol mr\u00e1z. Ten sa ale tento t\u00fd\u017ede\u0148 niekde pozabudol a tak snehov\u00e1 pokr\u00fdvka je ka\u017ed\u00fdm tepl\u00fdm d\u0148om viac a viac premo\u010den\u00e1. To m\u00e1 za n\u00e1sledok padanie z\u00e1kladov\u00fdch lav\u00edn. Sta\u010d\u00ed aby sa sneh premo\u010dil a\u017e do \u00faplne spodn\u00fdch vrstiev. Pri zemi sa \u010dasto nach\u00e1dza hranatozrnn\u00fd sneh, ktor\u00fd je ve\u013emi m\u00e4kk\u00fd a teda aj nestabiln\u00fd. Pr\u00edklad je lav\u00edna zo Stien v Malej Fatre. T\u00e1 spadla vo ve\u010dern\u00fdch hodin\u00e1ch, niekedy okolo 19tej hodiny. Jasn\u00fd d\u00f4kaz toho, \u017ee vo Fatr\u00e1ch je sneh na nasvieten\u00fdch svahoch \u00faplne premo\u010den\u00fd.<\/p>\n\n\n\n

Od severoz\u00e1padu k n\u00e1m postupne op\u00e4\u0165 prich\u00e1dza studen\u00fd front, ktor\u00fd so sebou nesie o\u010dak\u00e1van\u00e9 zr\u00e1\u017eky. Predpoklad\u00e1me, \u017ee po\u010das nadch\u00e1dzaj\u00faceho v\u00edkendu n\u00e1m sneh vo v\u0161etk\u00fdch pohoriach stvrdne alebo z\u013eadovatie. Ot\u00e1zne je, ako dobre sa na tento tvrd\u00fd podklad nalep\u00ed nov\u00fd sneh. Ide\u00e1lne by bolo, keby ochladenie spolu so sne\u017een\u00edm prich\u00e1dzalo pozvo\u013ena a nov\u00fd sneh by sa tak lep\u0161ie nalepil na star\u0161iu vrstvu. Neost\u00e1va n\u00e1m u\u017e teda ni\u010d in\u00e9, ako sa necha\u0165 prekvapi\u0165 a patri\u010dne sa na to pripravi\u0165. Do batoha si bude treba ako povinn\u00fa v\u00fdbavu pribali\u0165 ma\u010dky a cep\u00edn. <\/p>\n\n\n\n

Tak \u010di onak, treba by\u0165 st\u00e1le obozretn\u00fd a ide\u00e1lne denne sledova\u0165 v\u00fdvoj po\u010dasia a lav\u00ednov\u00fa inform\u00e1ciu vyd\u00e1van\u00fa Strediskom lav\u00ednovej prevencie na <\/p>\n\n\n\n

https:\/\/www.laviny.sk\/<\/a><\/strong><\/p>\n\n\n\n

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Studen\u00fd arktick\u00fd vzduch zo severu pre zmenu vystriedalo ju\u017en\u00e9 pr\u00fadenie s v\u00fdrazn\u00fdm oteplen\u00edm. Spolu s n\u00edm do na\u0161ej oblasti dovialo aj prach a piesok zo saharskej oblasti. Ten je s\u00edce nepatrne vidite\u013en\u00fd vo\u013en\u00fdm okom v podobe oparu nad horizontom, ale na zem nedopadol a sneh tak zostal \u017eiarivo biely. Na to aby piesok z ovzdu\u0161ia…<\/p>\n","protected":false},"author":1,"featured_media":7827,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[4],"tags":[363,46,293,292,362,127,359,154,155,156,171,189,197,202,214],"class_list":["post-7826","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pocasie-sneh-a-laviny","tag-baranec","tag-hzs","tag-lavinova-prevencia-2","tag-laviny-2","tag-piesok","tag-prehlad","tag-sahara","tag-sneh","tag-sneh-a-laviny","tag-snehova-pokryvka","tag-tatry","tag-velka-fatra","tag-vysoke-tatry","tag-zapadne-tatry","tag-ziarska-dolina"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8DxWh-22e","jetpack-related-posts":[],"jetpack_featured_media_url":"https:\/\/blog.laviny.sk\/wp-content\/uploads\/2021\/02\/Opar-so-saharskym-pieskom-nad-Liptovskou-kotlinou-25.02.2021.jpg","_links":{"self":[{"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/posts\/7826","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7826"}],"version-history":[{"count":17,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/posts\/7826\/revisions"}],"predecessor-version":[{"id":7875,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/posts\/7826\/revisions\/7875"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=\/wp\/v2\/media\/7827"}],"wp:attachment":[{"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.laviny.sk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}