FOG AND STRATUS - WEATHER EVENTS

by FMI


Parameter Description
Precipitation
  • Shallow stratus (radiation fog): generally no precipitation.
  • Stratus with larger vertical extent (especially advection fog): drizzle, in winter light snowfall or supercooled drizzle.
Temperature
  • St/fog covered areas in winter generally warmer, in summer cooler than adjacent cloud-free areas.
  • Reduced diurnal variation of temperature within cloudy areas.
Wind (incl. gusts)
  • For Radiation Fog light or calm wind conditions, for Advection Fog moderate, even slightly gusty winds.
Other relevant information
  • Visibility in Fog below 1000 m. Fluctuations in visibility, when cloud base temporarily lifting or lowering.
  • Icing possible within the supercooled cloud conditions. The most probable location for icing near the cloud top, where droplet size the largest.


SUB-MENU OF FOG AND STRATUS
TYPICAL APPEARANCE IN VERTICAL CROSS SECTIONS
REFERENCES