Skew-T Log-P

Use Skew-T Log-P Diagrams to see the current temperature and relative humidity at each altitude, what altitudes are likely to form clouds, storms, whether tempratures will cause rain, snow, freezing levels, etc. See also our Aviation Weather, IFR, Ceilings, Icing, Turbulence, Dew Point webpage.
Skew-T Log-P Diagrams Shown Below		NOAA Skew-T Log-P home page
Note dates and times on each chart (format "yymmdd/hhmm" GMT)		A great pilot's app for iPad, iPhone; get a copy on each. Chart data is updated hourly, for any airport or any location. See two videos explaining "Weather in the Vertical" Other webpages with Skew-T Log-P information Explanation of Skew-T Log-P Diagrams Vertical Motion of Air and Stability AOPA - Skew-T Basics Thermo and Skew-T Education Mathematical Algorithms NOAA GOES Image Viewer General Information: GOES Atmospheric Soundings Display Click here for a good description of Skew-T-graphic plotting. Additional sources for Soundings data NOAA-20 NUCAPS Global Map Earth System Research Laboratory - Model Soundings Model Analysis and Guidance - Forecast Soundings SPC Experimental Sounding Analysis System Hourly Mesoscale Analysis Definitions Adiabatic – occurring without loss or gain of heat Adiabatic Temperature – especially with regard to a lifting parcel of air Atmospheric Stability CAPE - Convective Available Potential Energy Convective Inhibition Determining Air Parcel Temperature: Rising air parcels and adiabatic cooling EL - Equilibrium Level Lapse Rate LFC - Level of Free Convection Saturated Adiabatic Lapse Rate Wind Barbs detailed description
Al - Birmingham Az - Flagstaff Az - Tucson Ca - Los Angeles Ca - San Diego Ca - San Francisco Canada - Ottawa Co - Denver DC - Washington Ga - Atlanta Fl - Cape Canaveral Fl - Jacksonville Fl - Key West Fl - Tallahassee Fl - Tampa Bay Ia - Des Moines Id - Boise Il - Lincoln La - Baton Rouge La - Shreveport	Me - Portland Mn - Minneapolis Mo - Springfield Ms - Jackson Mt - Great Falls NC - Greensboro NM - Albuquerque NY - Albany Oh - Wilmington Or - Portland Pa - Pittsburgh SC - Charleston SD - Rapid City Tn - Nashville Tx - Dallas - Ft. Worth Ut - Salt Lake City Va - Roanoke - Blacksburg Wa - Seattle Wi - Green Bay Wy - Riverton
Also shown: Current Doppler Radar "Weather in the Vertical" videos

Inches Hg to Millibars to Altitude conversion (standard pressure)

29.92"

1013 mb

0000'

23.98"

0812 mb

6000'

14.76"

0500 mb

FL 180

28.85"

0977 mb

1000'

23.09"

0782 mb

7000'

11.81"

0400 mb

FL 240

27.82"

0942 mb

2000'

22.24"

0753 mb

8000'

8.86"

0300 mb

FL 300

26.81"

0908 mb

3000'

21.38"

0724 mb

9000'

6.64"

0225 mb

FL 360

25.84"

0875 mb

4000'

20.58"

0697 mb

10,000'

5.17"

0175 mb

FL 420

24.89"

0843 mb

5000'

19.19"

0650 mb

12,000'

3.69"

0125 mb

FL 480

Skew-T Log-P chart showing standard temperatures

Current SkewT-LogP charts

Al - Brimingham

Az - Flagstaff

Az - Tucson

Ca - Los Angeles

Ca - San Diego

Ca - San Francisco

DC - Washington

Fl - Cape Canaveral

Fl - Jacksonville

Fl - Key West

Fl - Tallahassee

Fl - Tampa Bay

Canada - Ottawa

Co - Denver

Ga - Atlanta

Ia - Des Moines

Id - Boise

Il - Lincoln

La - Baton Rouge

La - Shreveport

Me - Portland

Mn - Minneapolis

Mo - Springfield

Ms - Jackson

Mt - Great Falls

NC - Greensboro

NM - Albuquerque

NY - Albany

Oh - Wilmington

Or - Portland

Pa - Pittsburgh

SC - Charleston

SD - Rapid City

Tn - Nashville

Tx - Dallas Ft. Worth

Ut - Salt Lake City

Va - Roanoke-Blacksburg

Wa - Seattle

Wi - Greenbay

Wy - Riverton

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Current Doppler Radar

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Videos explaining SkewT-LogP charts

Weather in the Vertical – part 1

Weather in the Vertical – part 2

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