Wet, cooler and Sea Smoke explained
Good morning Augusta.
This morning it is mostly cloudy with a chance of a thunderstorm and a
chance of rain, then a chance of rain in the afternoon. Fog early. High of
70F. Winds from the North at 5 to 10 mph. Chance of rain 40%.
Tonight it will be partly cloudy. Fog overnight. Low of 48F. Winds less than
5 mph.
The readings from my own instruments are:
The humidity is 90% with a Dew Point of 59.6ºF and a wind chill of 62.5ºF.
The temperature Is 62.5ºF.
We have North Northeast winds between 2.0 mph and 6.0 mph.
Our Barometric pressure is 30.03 HPA 1016.9 and rising with a weather
graphic indicating sun.
The UV rating is 0 out of 16, sunset will be at 7:20 PM with no Moon Rise
and the moon phase is in the last quarter.
For the pilots out there, Raw Metar readings are:
SPECI KAUG 291217Z AUTO 05008KT 10SM BKN010 BKN015 OVC032 17/16 A3011 RMK
AO2 CIG 007V013
Visibility is 10.0 miles/16.1 kilometers with mostly cloudy conditions
tetween 1,000 ft / 304 m. and to between 1,500 ft / 457 m. . and 3,200 ft
/ 975 m.
We've had rain here of 1.20 inches in the past 24 hours.
Have you ever wondered what causes Sea Smoke?
Sea smoke, or arctic steam fog, is a cloud over the sea, which could
otherwise be called fog, and is usually formed when very cold air moves over
warmer water. The physics are in principle similar to lake-effect snow.
Evaporation from exposed water surface depends upon its vapor pressure. If
the water temperature is greater than that of the nearby air, the
evaporation continues faster than the air can absorb the water vapor, even
though the cool air's relative humidity is 100%. This further evaporates
immediately and re-condenses as visible fog, which rises up in convective
currents. If the wind blows across cold icy areas like the Arctic, the
breaks in the ice sheets where clear water is exposed, the water surface
steams up into the air, producing fog.
The conditions required for such fog formation include not only low surface
temperature but also a preexisting surface inversion of temperature to
inhibit the rapid development of instability.
This morning it is mostly cloudy with a chance of a thunderstorm and a
chance of rain, then a chance of rain in the afternoon. Fog early. High of
70F. Winds from the North at 5 to 10 mph. Chance of rain 40%.
Tonight it will be partly cloudy. Fog overnight. Low of 48F. Winds less than
5 mph.
The readings from my own instruments are:
The humidity is 90% with a Dew Point of 59.6ºF and a wind chill of 62.5ºF.
The temperature Is 62.5ºF.
We have North Northeast winds between 2.0 mph and 6.0 mph.
Our Barometric pressure is 30.03 HPA 1016.9 and rising with a weather
graphic indicating sun.
The UV rating is 0 out of 16, sunset will be at 7:20 PM with no Moon Rise
and the moon phase is in the last quarter.
For the pilots out there, Raw Metar readings are:
SPECI KAUG 291217Z AUTO 05008KT 10SM BKN010 BKN015 OVC032 17/16 A3011 RMK
AO2 CIG 007V013
Visibility is 10.0 miles/16.1 kilometers with mostly cloudy conditions
tetween 1,000 ft / 304 m. and to between 1,500 ft / 457 m. . and 3,200 ft
/ 975 m.
We've had rain here of 1.20 inches in the past 24 hours.
Have you ever wondered what causes Sea Smoke?
Sea smoke, or arctic steam fog, is a cloud over the sea, which could
otherwise be called fog, and is usually formed when very cold air moves over
warmer water. The physics are in principle similar to lake-effect snow.
Evaporation from exposed water surface depends upon its vapor pressure. If
the water temperature is greater than that of the nearby air, the
evaporation continues faster than the air can absorb the water vapor, even
though the cool air's relative humidity is 100%. This further evaporates
immediately and re-condenses as visible fog, which rises up in convective
currents. If the wind blows across cold icy areas like the Arctic, the
breaks in the ice sheets where clear water is exposed, the water surface
steams up into the air, producing fog.
The conditions required for such fog formation include not only low surface
temperature but also a preexisting surface inversion of temperature to
inhibit the rapid development of instability.
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