Friday afternoon posting
Good afternoon Augusta.
Right now it is partly cloudy with a chance of a thunderstorm and a chance
of rain in the afternoon. Fog early. High of 88F. Winds from the SW at 5 to
10 mph. Chance of rain 20%.
Tonight it will be partly cloudy with a chance of a thunderstorm and a
chance of rain. Low of 70F. Winds less than 5 mph. Chance of rain 20%.
The readings outside at this moment taken from my own instruments are:
a relative humidity of 50% with a Dew Point of 70.2º F.
The temperature is 91.4ºF.
Presently we have West winds between 1.1 MPH and 3.2 MPH.
Our Barometric pressure is 29.87/HPA 1011.5 and rising with a weather
graphic indicating clouds.
UV is 11 out of 16, sunset will be at 8:00 PM with Moon Rise at 8:29 p.m.
Eastern Daylight Time, and the moon phase is Full Moon.
For the pilots out there: Raw METAR –
METAR KAUG 031653Z AUTO 00000KT 10SM CLR 29/18 A2995
We had no precipitation overnight in this area. Only fog in the morning.
Visibility is 10.0 miles / 16.1 kilometers with a few clouds and a great
ceiling.
I'm re-posting this short bit about the Heat Index. Given the brutal heat
and humidity out there, I thought it might be a good thing to review.
Heat Index
Heat indexFrom Wikipedia, the free encyclopedia
The heat index (HI) is an index that combines air temperature and relative
humidity in an attempt to determine the human-perceived equivalent
temperature — how hot it feels, termed the felt air temperature. The human
body normally cools itself by perspiration, or sweating, which evaporates
and carries heat away from the body. However, when the relative humidity is
high, the evaporation rate is reduced, so heat is removed from the body at a
lower rate causing it to retain more heat than it would in dry air.
Measurements have been taken based on subjective descriptions of how hot
subjects feel for a given temperature and humidity, allowing an index to be
made which relates one temperature and humidity combination to another at a
higher temperature in drier air.
The heat index was developed in 1978 by George Winterling as the "humiture,"
and was adopted by the National Weather Service a year later. It is derived
from work carried out by Robert G. Steadman. Like the wind chill index, the
heat index contains assumptions about the human body mass and height,
clothing, amount of physical activity, thickness of blood, sunlight and
ultraviolet radiation exposure, and the wind speed. Significant deviations
from these will result in heat index values which do not accurately reflect
the perceived temperature.
In Canada, the similar "humidex" is used in place of the heat index. The
humidex is not described here.
Right now it is partly cloudy with a chance of a thunderstorm and a chance
of rain in the afternoon. Fog early. High of 88F. Winds from the SW at 5 to
10 mph. Chance of rain 20%.
Tonight it will be partly cloudy with a chance of a thunderstorm and a
chance of rain. Low of 70F. Winds less than 5 mph. Chance of rain 20%.
The readings outside at this moment taken from my own instruments are:
a relative humidity of 50% with a Dew Point of 70.2º F.
The temperature is 91.4ºF.
Presently we have West winds between 1.1 MPH and 3.2 MPH.
Our Barometric pressure is 29.87/HPA 1011.5 and rising with a weather
graphic indicating clouds.
UV is 11 out of 16, sunset will be at 8:00 PM with Moon Rise at 8:29 p.m.
Eastern Daylight Time, and the moon phase is Full Moon.
For the pilots out there: Raw METAR –
METAR KAUG 031653Z AUTO 00000KT 10SM CLR 29/18 A2995
We had no precipitation overnight in this area. Only fog in the morning.
Visibility is 10.0 miles / 16.1 kilometers with a few clouds and a great
ceiling.
I'm re-posting this short bit about the Heat Index. Given the brutal heat
and humidity out there, I thought it might be a good thing to review.
Heat Index
Heat indexFrom Wikipedia, the free encyclopedia
The heat index (HI) is an index that combines air temperature and relative
humidity in an attempt to determine the human-perceived equivalent
temperature — how hot it feels, termed the felt air temperature. The human
body normally cools itself by perspiration, or sweating, which evaporates
and carries heat away from the body. However, when the relative humidity is
high, the evaporation rate is reduced, so heat is removed from the body at a
lower rate causing it to retain more heat than it would in dry air.
Measurements have been taken based on subjective descriptions of how hot
subjects feel for a given temperature and humidity, allowing an index to be
made which relates one temperature and humidity combination to another at a
higher temperature in drier air.
The heat index was developed in 1978 by George Winterling as the "humiture,"
and was adopted by the National Weather Service a year later. It is derived
from work carried out by Robert G. Steadman. Like the wind chill index, the
heat index contains assumptions about the human body mass and height,
clothing, amount of physical activity, thickness of blood, sunlight and
ultraviolet radiation exposure, and the wind speed. Significant deviations
from these will result in heat index values which do not accurately reflect
the perceived temperature.
In Canada, the similar "humidex" is used in place of the heat index. The
humidex is not described here.
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