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Forecasting Visibility

Forecasting Visibility. ASOS Visibility Sensor. Uses Xenon flash light source and then measures how much light is scatttered into sensor. Rayleigh Scattering. Mie Scattering. Offshore Flow and Enhanced Visibility. Radiation Fog. Radiation Fog From Above.

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Forecasting Visibility

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  1. Forecasting Visibility

  2. ASOS Visibility Sensor • Uses Xenon flash light source and then measures how much light is scatttered into sensor

  3. Rayleigh Scattering Mie Scattering

  4. Offshore Flow and Enhanced Visibility

  5. Radiation Fog

  6. Radiation Fog From Above

  7. 000 FXUS62 KGSP 131857 AFDGSP AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC 253 PM EDT THU APR 13 2006 .SHORT TERM /TONIGHT THROUGH SATURDAY/... NORTHWESTERLY FLOW ALOFT WILL REMAIN OVER THE AREA THRU FRIDAY. …. THERE IS THE POSSIBILITY THAT KAND/KCLT COULD HAVE A BRIEF PERIOD OF MVFR FOG AROUND SUNRISE FRI GIVEN THE FORECAST HYDROLAPSE. HOWEVER CROSSOVER TEMPS ARE WELL BELOW FORECAST LOW TEMPS...THEREFORE WILL LEAVE OUT FOR NOW. CANNOT RULE OUT SOME VFR CEILINGS FROM TIME TO TIME...BUT CHANCE NOT HIGH ENOUGH TO INCLUDE AT THIS TIME. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...NONE. NC...NONE. SC...NONE. && $$ SHORT TERM...RWH/CSH LONG TERM...CSH AVIATION...RWH

  8. Advection Fog

  9. Upslope Fog

  10. Upslope Fog: Snoqualmie Pass

  11. The END

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