WATER VAPOR

Water Vapor Mixing Ratio

Forecast relative to the night starting on 2026/06/14 MST

Note: click on a figure to magnify the image. Date of figures refers to the start of night in MST.

Vertical profiles of the water vapor mixing ratio are computed in the [0-20km] range above ground level (a.g.l.) and centered on the LBT. Data points frequency is 2 minutes.

TEMPORAL EVOLUTION
TIME AVERAGES

TEMPORAL EVOLUTION:

The contour plot represents the temporal evolution of water vapor mixing ratio vertical profiles between the sunset and the sunrise. On the x-axis is time in UT (bottom), in MST (top). Mountain Standard Time MST=UT-7. On the y-axis the height above ground level. The color scale represents the water vapor mixing ratio value.

Fig. 1: Water vapor mixing ratio vertical profile temporal evolution between the sunset and the sunrise
extended on [0-20]km above ground level (a.g.l).
Dashed lines indicate the dusk and the dawn.

Fig. 2: Water vapor mixing ratio vertical profile temporal evolution between the sunset and the sunrise
extended on [0-5]km above ground level (a.g.l).
Dashed lines indicate the dusk and the dawn.

TIME AVERAGES:

Three time averages are presented, computed in the first, central and last part of the night (see partition). The corresponding MST (MST=UT-7) is shown on the top of the figure.
The blue light halo around each average represents the +/- sigma in the respective time window.
Fig. 5 represents the three time averages in the same plot with different colors to better appreciate the macroscopic changes in the three temporal intervals.

Fig. 3: Average water vapor mixing ratio in the “first part of the night”.

Fig. 4: Average water vapor mixing ratio in the “central part of the night”.

Fig. 5: Average water vapor mixing ratio in the “last part of the night”.

Fig 6: Averaged water vapor mixing ratio in the three successive periods of the night (see red, blue and green intervals).