( ( The ( basic ( weather elements ) ) ) ( ( observed ( ( are : ) ( ( ( ( ( ( ( ( ( ( ( ( ( ( sky condition ) , ) visibility ) , ) ( present weather ) ) , ) ( obstructions ( to ( vision ( , ( pressure ( , ( temperature ( , ( dew point ) ) ) ) ) ) ) ) ) ) , ) ( wind ( ( direction and ) speed ) ) ) , ) ( precipitation accumulation ) ) , ) and ) ( selected ( significant remarks ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ basic) (NN weather) (NNS elements)) (VP (VBD observed) (SBAR (S (VP (VBP are) (: :) (NP (NP (NN sky) (NN condition)) (, ,) (NP (NN visibility)) (, ,) (NP (JJ present) (NN weather)) (, ,) (NP (NP (NNS obstructions)) (PP (TO to) (NP (NN vision) (, ,) (NN pressure) (, ,) (NN temperature) (, ,) (NN dew) (NN point)))) (, ,) (NP (NN wind) (NN direction) (CC and) (NN speed)) (, ,) (NP (NN precipitation) (NN accumulation)) (, ,) (CC and) (NP (VBN selected) (JJ significant) (NNS remarks))))))) (. .)))
The basic weather elements observed are: sky condition, visibility, present weather, obstructions to vision, pressure, temperature, dew point, wind direction and speed, precipitation accumulation, and selected significant remarks.
(ROOT (S (NP (NN Temperature) (CC and) (NN sky) (NNS conditions)) (VP (VBP are) (ADVP (DT both)) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NN weather))))))) (. .)))