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Stability: Absolute Instability: Adiabatic lapse rate greater than 5 degs. F.,3.0 degs. C. per 1,000 feet.
Stability: Absolute Stability Isothermal: Temperature remaing the same from surface to some point aloft.
Stability: Absolute Stability Inversion:  Temperature warmimg as air ascends.
Stability: Absolute Stability:  Adiabatice lapse remaing at 5 degrees F., 3.0 degs. C.  per 1,000 feet.
Stability: Conditional Stability:  Adiabatic temperature between 5 Deg. F., 3.0 Degs. C. per 1,000 feet.
Stability: Dry Adiabatic Lapse Rate: 5 Degs. F., 3 Degs. C. per 1,000 feet.
Stability: Moist Adiabatic Lapse Rate: 3 Degs. F., 1.5 Degs. C. per 1,000 feet.






Meteorology              Charles A. Giannetta
                         Meteorologist - Professor 


"S T A B I L I T Y"

Stability: Absolute Instability: Adiabatic lapse rate greater than 5 degs.
F.,3.0 degs. C. per 1,000 feet.

Stability: Absolute Stability Isothermal: Temperature remaing the same 
from surface to some point aloft.

Stability: Absolute Stability Inversion:  Temperature warmimg as air ascends.
Stability: Absolute Stability: Adiabatice lapse remaing at 5 degrees F., 
3.0 degs. C.  per 1,000 feet.

Stability: Conditional Stability: Adiabatic temperature between 5 Deg. F., 
3.0 Degs. C. per 1,000 feet.

Stability: Dry Adiabatic Lapse Rate: 5 Degs. F., 3 Degs. C. per 1,000 feet.

Stability: Moist Adiabatic Lapse Rate:3 Degs. F., 1.5 Degs. C. per 1,000 feet.


Stability Index: The stability index is used in determimg the stability of 
the atmosphere. Is is a good guide as to the stability of the atmosphere:
 
It  is a good indicator as to whether air will ascend or not. A negative 
stability index indicates air will rise . A positive stability index will 
indicate the air will rise slowly or not at all. If the rising air is warmer
than the surrounding air it will continue to rise, this will indicate a
negative stability index. The more unstable the parcel of air the more likely 
it will continue to rise with the possibility of severe weather.
The more stable the air is indicates that the air will rise slowly or not
at all.

Standard Height of the 925 mb Chart: - - - 2,500 Feet. 
925mb = 761 Meters.   On the WX Map plotted as 761 meters.

Standard Height of the 850 mb Chart: - - - 5,000 Feet.   
850mb = 1522 meters.  On the WX Map the 1 is omitted. = 522 meters.

Standard Height of the 700 mb Chart: - - - 10,000 Feet.  
700mb = 3046 meters.  On the WX Map the first nunmber is ommited. 
= 046 meters.

Standard Height of the 500 mb Chart: - - - 18,000 Feet. 
500mb = 5482 Meters.  On the WX Map the last number is omitted. = 548 meters.

Standard Height of the 300 mb Chart: - - - 30,000 Feet. 
300mb = 9137 Meters.  On the WX Map the last number is omitted. = 914 meters.

Standard Height of the 250 mb Chart: - - - 35,000 Feet. 
250mb = 10660 Meters. On the WX Map the first & last numbers is omitted.
= 066 meters

Standard Height of the 200 mb Chart: - - - 40,000 Feet. 
200mb = 12181 Meters. On the WX Map the first & last numbers is omitted. = 218

Standard Height of the 150 mb Chart: - - - 45,000 Feet. 
140mb = 13706 Meters. On the WX Map the first & last numbers is omitted. = 371

Standard Height of the 100 mb Chart: - - - 50,000 Feet.  
100mb = 15228 Meters. On the WX Map the first & last numbers is omitted.
= 528 meters.

Standard Barometric Pressure: Standard Barometric Pressure at sea level is:
1013.2 mb.  29.92 inches of mecury. 14.7 lbs. per sq. inch. at a standard 
temperature of 59 degs. F.