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Učit se znamená objevovat to, co už víš.
Konat znamená demonstrovat, že to to víš.
Učit druhé znamená připomínat jim, že to vědí stejně dobře jako ty.
Všichni jste zároveň žáci, praktikanti a učitelé.

Richard Bach

Polní laboratoř

Informace z polní laboratoře – Bořitov Altocumulus 24. 8. 2014, 10:20 UTC, W

Atocumulus, Altomumulus lenticularis, Stratocumulus 24. 8. 2014, 10:20 UTC, NWW
Atocumulus, Altomumulus lenticularis, Stratocumulus 24. 8. 2014, 10:25 UTC, NWW
Atocumulus, Altomumulus lenticularis, Stratocumulus 24. 8. 2014, 10:25 UTC, N
Atocumulus, Altomumulus lenticularis, Stratocumulus 24. 8. 2014, 10:25 UTC, N
Atocumulus, Altomumulus lenticularis, Stratocumulus 24. 8. 2014, 10:25 UTC, N
Meteorologické pozorování 1 m nad povrchem trávníku, Bořitov Hlavní stanice
Meteorologické pozorování 2 m nad povrchem trávníku, Bořitov Hlavní stanice
Meteorologické pozorování, Bořitov letiště

Nimbostratus cloud

Nimbostratus is a low-to-middle altitude cloud that has considerable vertical and horizontal extent and produces precipitation over a wide area. "Nimbo" is from the Latin word "nimbus", which denotes precipitation. It is a multilevel stratiform layer with a diffuse cloud base generally found anywhere from near surface and about 10000 ft (3000 m). This cloud typically forms from altostratus in the middle altitude range, but it tends to thicken into the low altitude range during precipitation. Although usually dark at its base, it often appears illuminated from within to a surface observer.[1] Nimbostratus usually has a thickness of about 2000 m. Though found worldwide, nimbostratus occurs more commonly in the middle latitudes.[2] Nimbostratus will occur along a warm front where the slowly rising warm air mass creates nimbostratus along with shallower stratus clouds producing less rain, these clouds being preceded by higher-level clouds such as cirrostratus and altostratus clouds.[3][4] Often, when an altostratus cloud thickens and descends into lower altitudes, it will become nimbostratus.[5] Nimbostratus, unlike cumulonimbus, is not a ss ociated with thunderstorms, however at an unusually unstable warm front caused as a result of the advancing warm air being hot, humid and unstable, cumulonimbus clouds may be embedded within the usual nimbostratus. Lightning from an embedded cumulonimbus cloud may interact with the nimbostratus but only in the immediate area around it. In this situation with lightning and rain occurring it would be hard to tell which type of cloud was producing the rain from the ground, however cumulonimbus tend to produce larger droplets and more intense downpours. The occurrence of cumulonimbus and nimbostratus together is uncommon, and usually only nimbostratus is found at a warm front. Nimbostratus fractus is a variation of nimbostratus and will sometimes occur as a weather front clears, these being areas of dark rain bearing clouds with lighter altostratus between. Lowell is now a large hurricane in the Eastern Pacific and NASA's Aqua and Terra satellites double-teamed it to provide infrared and radar data to scientists. Lowell strengthened into a hurricane during the morning hours of August 21. When NASA's Aqua satellite passed over Lowell on August 20 at 21:05 UTC (4:05 p.m. EDT), the Atmospheric Infrared Sounder got an infrared look at Lowell's cloud top temperatures when it was still a tropical storm. AIRS showed a very thick band of thunderstorms surrounding the center of circulation and what appeared to be a very small cloud-free center of circulation, like the formation of an eye. Cloud top temperatures exceeded -63F/-52C, the threshold for high, cold thunderstorms with the potential for dropping heavy rainfall.


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