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21 Nov 2024 - 10:53 EST
21 Nov 2024 - 15:53 UTC

Post-tropical Cyclone Helene - Air Mass at 36.6°N - 87.4°W

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Apparent 'jumps' in the animation occur due to adjustments to reflect storm movement.

  

  

  
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 1920 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 1920 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 1930 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 1930 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 1940 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 1940 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2000 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2000 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2010 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2010 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2020 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2020 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2030 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2030 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2040 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2040 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2100 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2100 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2110 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2110 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2120 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2120 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2130 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2130 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2140 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2140 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2200 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2200 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2210 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2210 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2220 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2220 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2230 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2230 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2240 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2240 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2300 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2300 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2310 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2310 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2320 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2320 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2330 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2330 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2340 UTC
Air Mass - RGB based on data from IR & water vapor - 28 Sep 2024 - 2340 UTC
Air Mass - RGB based on data from IR & water vapor - 29 Sep 2024 - 0000 UTC
Air Mass - RGB based on data from IR & water vapor - 29 Sep 2024 - 0000 UTC
legend for AirMass RBG

Key for AirMass RGB:

1 - Jet stream / potential vorticity (PV) / deformation zones / dry upper level (dark red / orange)

2 - Cold air mass (dark blue/purple)

3 - Warm air mass (green)

4 - Warm air mass, less moisture (olive/dark orange)

5 - High thick cloud (white)

6 - Mid level cloud (tan/salmon)

7 - Low level cloud (green, dark blue)

8 - Limb effects (purple/blue)

Air Mass RGB is used to diagnose the environment surrounding synoptic systems by enhancing temperature and moisture characteristics of airmasses. Cyclogenesis can be inferred by the identification of warm, dry, ozone-rich descending stratospheric air associated with jet streams and potential vorticity (PV) anomalies. The RGB can be used to validate the location of PV anomalies in model data. Additionally, this RGB can distinguish between polar and tropical airmasses, especially along upper-level frontal boundaries and identify high-, mid-, and low-level clouds.

• For more details, see the Air Mass RGB Guide, (PDF, 1.1 MB)