|
F O G - F O R M A T I O N |
| Type |
Formation - Dissolution |
|
RADIATION |
1 - Clear Nite , Wind < 5
mph , Radiational Cooling 2 - Heavier Cold Air flows into Lower Places 3 - Fog forms as Air Cools to Dew Point , < 200 ' 4 - Morning Sun raises Temp. above Dew Point, Wind mixes Warmer Air |
| VALLEY | 1 - Large Valleys in Winter w /
surrounding Mountains, can exceed 1.500 ' 2 - Winter Sun may not be enough to Dissipate, can raise Fog to 500 ' 3 - Can last for days until Strong Wind ( Storm ) Dissipates |
| ADVECTION | 1 - Warm , Humid Air moves Inland
Horizontally in Winter 2 - Air Cooled to Dew Point by Cooler Ground 3 - Can cover large areas , Dissipated by Sun or Wind |
| UPSLOPE | 1 - Warm , Humid Air moves up
Hill or Mountain 2 - Fog forms as Temp. drops to Dew Point - Adiabatic Temp. Change 3 - Dissipated by Sun or Wind |
| SEA SMOKE STEAM |
1 - Cool Air moves over Warm
Water 2 - Water Evaporates into Cool Air increasing to Dew Point forming Fog 3 - Can see "Steam" rising from ponds & lakes in Fall 1 - 2 " above water 4 - Dissipated by Wind |
| PRECIPITATION | 1 - Some Rain Evaporates if warmer
than Air 2 - Vapor reaches Dew Point - Fog forms 3 - Dissipated by Sun or Wind after Rain stops |
FOG is essentially a Cloud on the Ground