Weather Blog: Dangerous August Heat

News

When it comes to Summer in the Tennessee Valley, we must always remember that August can be just as bad if not worse than July despite the fact that the average daily high actually drops. Looking through climate reports I find that August has some very warm days. When looking at the maximum high temperature during the month since records began the mean max is 98 degrees. The upcoming week will be no exception to the above.

Humidity Meter

During the day Monday an area of high pressure will begin to push east. Dew Points will climb into the mid and even upper 70s Monday through the later part of next week. This was noticed by incredibly high PWATS that were well exceeding 2”

I feel like I can better drive this point home if I define PWAT. PWAT stands for “precipitable water”. This is the amount of water that would accumulate if all the available moisture fell from a particular column of air. Referring to air as a “column” is arbitrary and something we usually did when I was in school in order to compute these things by hand. So, saying that PWATS are at or well above 2” is a simple way of saying “there’s a lot of moisture”. This goes together with the dew point since the dew point is the temperature the air would have to be cooled to in order to reach 100% saturation. The higher the dew point the more moisture that is present.

From here we move onto the heat index. As you probably know, heat index factors in the humidity and the air temperature and tells us the feels like temperature as opposed to the air temperature.

Air temperatures will climb into the mid-90s next week so when we think about that and the upper 70 dew points, we’ll be talking about heat indices between 105-110 degrees.

With that type of heat in the forecast, it is imperative that everyone takes the dame safety precautions you would take if it were going to be very cold. Just in a different way of course.

Outside Temp. VS Vehicle Temp.

First, most important, and probably the most common sense thing. Check the back seat of your car. With the outside temperature in the mid-90s the inside car temp. will climb quickly into the triple digits. Please reference the vehicle temps. chart.

Madison County Schools practice rules in extreme heat

Parents of athletes also should be checking with their schools’ athletic department on any procedures or rules in place when it comes to practices and games that take place. A good example is the chart which shows the rules that are in place for Madison County Schools.

Madison County Schools also tells us that as of Friday they have already reached out to coaches informing them of the policies in place.

©TEGNA Inc. 2019. All Rights Reserved.

Overcast

Huntsville

64°F Overcast Feels like 64°
Wind
12 mph SSW
Humidity
75%
Sunrise
Sunset

Tonight

Cloudy with periods of rain. Low 49F. SW winds shifting to NW at 10 to 15 mph. Chance of rain 90%. Rainfall around a quarter of an inch.
49°F Cloudy with periods of rain. Low 49F. SW winds shifting to NW at 10 to 15 mph. Chance of rain 90%. Rainfall around a quarter of an inch.
Wind
10 mph WSW
Precip
90%
Sunset
Moon Phase
Waxing Gibbous
Overcast

Decatur

65°F Overcast Feels like 65°
Wind
16 mph S
Humidity
75%
Sunrise
Sunset

Tonight

Rain showers early will evolve into a more steady rain overnight. Low 48F. SW winds shifting to NW at 10 to 15 mph. Chance of rain 90%. Rainfall near a quarter of an inch.
48°F Rain showers early will evolve into a more steady rain overnight. Low 48F. SW winds shifting to NW at 10 to 15 mph. Chance of rain 90%. Rainfall near a quarter of an inch.
Wind
12 mph W
Precip
90%
Sunset
Moon Phase
Waxing Gibbous
Overcast

Florence

66°F Overcast Feels like 66°
Wind
17 mph SSW
Humidity
78%
Sunrise
Sunset

Tonight

Overcast with rain showers at times, turning colder after midnight. Low 40F. Winds S shifting to NW at 10 to 20 mph after midnight.
40°F Overcast with rain showers at times, turning colder after midnight. Low 40F. Winds S shifting to NW at 10 to 20 mph after midnight.
Wind
10 mph W
Precip
30%
Sunset
Moon Phase
Waxing Gibbous
Overcast

Scottsboro

64°F Overcast Feels like 64°
Wind
7 mph
Humidity
83%
Sunrise
Sunset

Tonight

Rain. Low around 50F. Winds WSW at 5 to 10 mph. Chance of rain 90%. Rainfall near a quarter of an inch.
50°F Rain. Low around 50F. Winds WSW at 5 to 10 mph. Chance of rain 90%. Rainfall near a quarter of an inch.
Wind
7 mph WSW
Precip
90%
Sunset
Moon Phase
Waxing Gibbous
Overcast

Guntersville

64°F Overcast Feels like 64°
Wind
15 mph SSW
Humidity
68%
Sunrise
Sunset

Tonight

Rain likely. Low 53F. Winds SW at 5 to 10 mph. Chance of rain 90%. Rainfall near a half an inch.
53°F Rain likely. Low 53F. Winds SW at 5 to 10 mph. Chance of rain 90%. Rainfall near a half an inch.
Wind
8 mph SW
Precip
90%
Sunset
Moon Phase
Waxing Gibbous

More from WZDX News

Get our WZDX News & Weather Apps

ANDROID
iOS
ANDROID
iOS