Early morning radiation fog.

Early morning radiation fog.

Fog and rain make for a dreary day.

Valley fog and pollution.

Morning smog.

Morning smog - Photo #1 of sequence.

Smog clearing in the early afternoon - Photo #2 of sequence.

After a cold front cleared the air - Photo #3 of sequence.

A SURVEYOR sunset. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset - Photo #1 of sequence. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset - Photo #2 of sequence. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset - Photo #3 of sequence. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset - Photo #4 of sequence. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset - Photo #5 of sequence. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset. On board the NOAA Ship SURVEYOR on the way north.

A SURVEYOR sunset. On board the NOAA Ship SURVEYOR on the way north.

Cloud reflections on a calm sea. On board the NOAA Ship SURVEYOR on the way north.

Sunset with crepuscular rays.

Sunset with shadow bands.

Sunset in the Gulf of Mexico.

"Cirri ober Ferwolken". In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

"Stratusoberflache in 1300 m" Bildstelledes preusB. Ministeriums fur Handel u. Gewerbe. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

"Wogenwolken" Bildstelledes preusB. Ministeriums fur Handel u. Gewerbe. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

"Drei Wolkenformationen ubereinander, Wellenbildungen verscheidener Lange". Captain Alfred G. Buckham. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

"Gewitterwolken" Captain Alfred G. Buckham. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

"Aufquellender Cumuluskopf" Captain Alfred G. Buckham. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

"Die Hohle unter der Wolke" Captain Alfred G. Buckham. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

Military aircraft flying over layer of strato-cumulus; cirro-stratus above. In: "Monthly Weather Review," August 1919, p. 523.

Military aircraft flying near towering cumulus. In: "Monthly Weather Review," August 1919, p. 523.

The top of the Woolworth Building seen through the fog. In: "Flug Und Wolken", Manfred Curry, Verlag F. Bruckmann, Munchen, 1932.

A glorious sunset illuminates altocumulus clouds as seen from above.

An offshore rain shower and a soaring pelican off the beach at Boca Raton.

Rain shaft to left - rainfree base of thunderstorm to right. Photo taken during National Geographic filming of special on cyclones.

A rainbow makes a bright spot in the water. Perhaps there is a pot of gold at end of the rainbow.

Which way is up? A mirror-smooth sea reflects cumulus clouds on a still morning in the Keys.

A rainbow makes a bright spot in the water. Perhaps there is a pot of gold at end of the rainbow.

Reflections on a mirror-smooth sea make it difficult to determine where the sea begins on a horizonless morning.

Cumulus building over the Florida Keys.

Which way is up? A mirror-smooth sea reflects cumulus clouds on a still morning in the Keys.

Sea and atmosphere merge into one as reflection obscure the horizon on a still Florida Keys morning.

Clouds caused by gravity waves within meteorological disturbance. Where the wave has a crest, the cloud forms.

Clouds caused by gravity waves within meteorological disturbance. wave has a crest, the cloud forms.

Clouds caused by gravity waves within meteorological disturbance. wave has a crest, the cloud forms.

Sail boat approaching squall line.

There was a crooked house following tornado passage at Lawrence. An example of a New England tornado. 8 people were killed and 52 injured in this storm. In: "The Lawrence Tornado of July 26, 1890" by W. M. Davis, et al. 1892. Library Call Number M/1580 D2651.

A house whose first floor collapsed following tornado passage at Lawrence. An example of a New England tornado. 8 people were killed and 52 injured. In: "The Lawrence Tornado of July 26, 1890" by W. M. Davis, et al. 1892. Library Call Number M/1580 D2651.

Houses whose roofs and sides were removed by the tornado. Note the beds in the left-hand house still sitting in the bedrooms. An example of a New England tornado. In: "The Lawrence Tornado of July 26, 1890" by W. M. Davis, et al. 1892. Library Call Number M/1580 D2651.

Results of a hailstorm at Weatherford, Oklahoma.