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Skew-T Log-P Diagrams

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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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