Light rain, and "Heat Index" defined
Good morning Augusta.
Its raining out there this morning, so drive careful.
This morning it is overcast with a chance of a thunderstorm and a chance of
rain. High of 73F. Winds from the South at 5 to 10 mph. Chance of rain 60%.
Tonight it will be overcast with a chance of a thunderstorm and a chance of
rain, then a chance of rain after midnight. Fog overnight. Low of 66F. Winds
from the South at 5 to 10 mph. Chance of rain 60% with rainfall amounts near
0.2 in. possible.
The readings from my own instruments are:
The humidity is 98% with a Dew Point of 58.1ºF and a wind chill of 59.2ºF.
The temperature is 61.9ºF.
We have South Southwest winds between 1.0 MPH and 5.0 MPH.
Our Barometric pressure is 30.00 HPA 1015.9 and rising with a weather
graphic indicating sun.
The UV rating is 0 out of 16, sunset will be at 7:54 PM with Moon Rise at
7:24 a.m. and the moon phase is a New Moon.
For the pilots out there, Raw Metar readings are:
METAR KAUG 081053Z AUTO 16007KT 10SM -RA FEW019 OVC034 16/15 A3008 RMK AO2
RAB05E27B48 SLP187 P0000 T01610150
Visibility is 10.0 miles/16.1 kilometers with few clouds to 1,900 ft / 579
m., and overcast to 3,400 ft / 1,036 m.
We've had 0.07 inches of rain here in the past 24 hours.
If you've ever wondered about the "Heat Index" here is a short explanation
of it.
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.
Its raining out there this morning, so drive careful.
This morning it is overcast with a chance of a thunderstorm and a chance of
rain. High of 73F. Winds from the South at 5 to 10 mph. Chance of rain 60%.
Tonight it will be overcast with a chance of a thunderstorm and a chance of
rain, then a chance of rain after midnight. Fog overnight. Low of 66F. Winds
from the South at 5 to 10 mph. Chance of rain 60% with rainfall amounts near
0.2 in. possible.
The readings from my own instruments are:
The humidity is 98% with a Dew Point of 58.1ºF and a wind chill of 59.2ºF.
The temperature is 61.9ºF.
We have South Southwest winds between 1.0 MPH and 5.0 MPH.
Our Barometric pressure is 30.00 HPA 1015.9 and rising with a weather
graphic indicating sun.
The UV rating is 0 out of 16, sunset will be at 7:54 PM with Moon Rise at
7:24 a.m. and the moon phase is a New Moon.
For the pilots out there, Raw Metar readings are:
METAR KAUG 081053Z AUTO 16007KT 10SM -RA FEW019 OVC034 16/15 A3008 RMK AO2
RAB05E27B48 SLP187 P0000 T01610150
Visibility is 10.0 miles/16.1 kilometers with few clouds to 1,900 ft / 579
m., and overcast to 3,400 ft / 1,036 m.
We've had 0.07 inches of rain here in the past 24 hours.
If you've ever wondered about the "Heat Index" here is a short explanation
of it.
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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