1 / 30

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.

hali
Download Presentation

Forecasting Visibility

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

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. 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. Duststorms: An increasing forecasting problem

  12. April 21, 1931: The Biggest Duststorm in NW History

  13. Why increasing? • Drier conditions in western U.S • More disturbance of soils—more grazing, more off-road vehicles, more mountain biking, more exploration for oil and another resources. • More dust coming from Asia.

  14. LA Smog

  15. The END

More Related