Front Intensification By Jet Crossing

• Cloud Structure In Satellite Images
• Meteorological Physical Background
• Key Parameters
• Typical Appearance In Vertical Cross Sections
• Weather Events
• References

Weather Events

Where there is no orography, cloud fraction in mid- and high- levels dominate with slight to moderate rain or drizzle at the surface.

Parameter	Description
Precipitation	Intensifying precipitation, embedded Cbs and thunderstorms. May prolong the rainy period after the passage of the actual frontal precipitation area.
Temperature	No significant change.
Wind (incl. gusts)	No significant change.
Other relevant information

The case of 27 September 2019/12 UTC is also appropriate for the demonstration of weather events.

Legend: 27 September 2019, 12UTC: left: IR + synoptic measurements; right: probability of moderate rain (Precipitating clouds PF - NWCSAF).
Note: for a larger SYNOP image click this link.

Nearly all stations report heavy rain in this area of the "FI by Jet" and precipitation Probability from NWCSAF shows high values at least up to 65%.

Legend:
27 September 2019, 12 UTC, IR ; superimposed: u.l.: Cloud Type (CT NWCSAF); u.r.: Cloud Top Height (CTTH - NWCSAF); l.l.: Convective Rainfall Rate (CRR NWCSAF); l.r.: Radar intensities from Opera radar system.

For identifying values for Cloud type (CT), Cloud type height (CTTH), precipitating clouds (PC), and Opera radar for any pixel in the images look into the legends. (link).