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Meteo Question

Sat Feb 27, 2010 11:08 am

Can you have both fog and rain/snow at the same time? In what (micro-climate?) situation would this arise?

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RE: Meteo Question

Sat Feb 27, 2010 11:22 am

Sure. The rain can fall from above the fog and thus through it. Don't know about snow and fog. If it is "proper" snow, that is not sleet, it might be too cold for fog.

I regularly see rain + fog in HK. As in I'm standing in fog and rain will fall on me.

At a guess, high humidity helps.
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RE: Meteo Question

Sat Feb 27, 2010 4:59 pm

Snow in fog occurs routinely here in Colorado on the eastern slope of the Rocky Mountains. When snow begins to fall, the ground is warmer than the air, creating radiation fog with enough humidity. The snow falls from clouds high above the dense ground fog. In many snow conditions, the front is stable, helping to ensure low surface winds, further promoting fog development. Pacific storms don't generally have enough moisture to cause this, but the upslope flow from Gulf storms in the spring usually do. The National Weather Service will call this as fog, but depending on the air temperature near the surface, can also refer to it as light snow with mist and associated reduced visibility.
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RE: Meteo Question

Fri Mar 12, 2010 11:35 am

Yes it is possible. Precipitation can actually cause fog to form. The evaporation/sublimation of the falling precip will cause the temperature to drop and and the humidity to rise.

This is the current Stampede Pass METAR: KSMP 121056Z AUTO VRB06G20KT 1/4SM -SN FG VV001 01/M01 A2963 RMK AO2 SLP053 P0002 T00061006 TSNO $
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