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Enhancing Visibility Forecasting with Sensor Technology for Weather Monitoring

This discussion highlights the application of sensor technology and xenon flash light sources to measure and enhance visibility in varying weather conditions. The focus is on Rayleigh and Mie scattering mechanisms and their effects on visibility, particularly in areas such as Snoqualmie Pass. The forecast period extends through the weekend, addressing the potential for MVFR fog and varying VFR ceiling conditions. The analysis considers the impact of offshore flow and various types of fog, providing insights into predicting and managing visibility during adverse weather events.

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Enhancing Visibility Forecasting with Sensor Technology for Weather Monitoring

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Presentation Transcript

  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. Advection Fog

  8. Upslope Fog

  9. Upslope Fog: Snoqualmie Pass

  10. 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

  11. The END

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