Temperature advection

Weather events are highly variable and can differ from season to season. Presented here are weather events related to the passage of a cold front during summer and winter in central Argentina.


Summer

Parameter Description
Precipitation
  • Convective precipitation along the frontal cloudiness.
  • Isolated heavy rain showers, especially when a MCS develops.
Temperature
  • Falls after the passage of the front.
  • The minimum temperature of the day following the passage is affected most.
  • Low thermal contrast between air masses on both sides of the cold front.
Wind (incl. gust)
  • Around deep convection or MCSs strong gusts are possible.
  • Veering of the wind caused by the frontal passage.
Other relevant information
  • Hail storms are possible in severe convection.
  • Lightning activity associated with Cbs.

Winter

Parameter Description
Precipitation
  • Stratiform precipitation (light rain and drizzle) along the frontal cloudiness with some embedded Cbs (rain and small hail showers).
  • Snow, sleet and/or ice pellets showers in the southeastern part of Argentina, related to open cell cloudiness after the front passage.
Temperature
  • Important falls after the passage of the front.
  • High thermal contrast between air masses on both sides of the cold front.
Wind (incl. gust)
  • Veering of the wind at the frontal passage.
  • Wing gusts are possible after the passage of the front.
Other relevant information
  • Dust storms in western part of Argentina are more probably due to driest surface (dry season).
  • Frosts in the central part of Argentina the day after the passage of the front.


6 February 2014/00.00 UTC - GOES 13 IR 10.7 image; weather events (green: rain, blue: drizzle, red: thunderstorm, yellow: fog, brown: dust, black: no actual precipitation or present weather report)
10 September 2015/00.00 UTC - GOES 13 IR 10.7 image; weather events (green: rain, blue: drizzle, red: thunderstorm, yellow: fog, brown: dust, black: no actual precipitation or present weather report)

6 February 2014/00.00 UTC - SYNOP surface temperature report
10 September 2014/00.00 UTC - SYNOP surface temperature report

 

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