1 / 13

Web-Based Graphical Output of WAFS Gridded Icing, Turbulence, Cumulonimbus Cloud .

WAFC Science Meeting 20-21 April 2009 Washington DC. Web-Based Graphical Output of WAFS Gridded Icing, Turbulence, Cumulonimbus Cloud. Larry Burch, WAFC Washington Nigel Gait, WAFC London. WAFC Science Meeting 20-21 April 2009 Washington DC. WAFS Gridded ICE, TURB, CB.

chakra
Download Presentation

Web-Based Graphical Output of WAFS Gridded Icing, Turbulence, Cumulonimbus Cloud .

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. WAFC Science Meeting 20-21 April 2009 Washington DC. Web-Based Graphical Output of WAFS Gridded Icing, Turbulence, Cumulonimbus Cloud . Larry Burch, WAFC Washington Nigel Gait, WAFC London

  2. WAFC Science Meeting 20-21 April 2009 Washington DC. WAFS Gridded ICE, TURB, CB • Three Output Components • GRIB2 • The full product suite • Web-based graphics • Limited set of products • “High-at-a-Glance” • Minimum set of products

  3. WAFC Science Meeting 20-21 April 2009 Washington DC. GRIB2 Data Set • Everything currently in GRIB1, • i.e., Wind, Temp, Humidity, Trop Height , Max Wind, • Plus • Icing, Turbulence, Cumulonimbus Cloud.

  4. WAFC Science Meeting 20-21 April 2009 Washington DC. GRIB2 Full Product Suite • 3 hourly time steps forecasts: • 6,9,12,15,18,21,24,27,30,33 and 36 hours. • 3 additional level for wind/temp: • FL 270, 320 and 360. • 1.25 degree resolution. (regular grid = unthinned) • Issued 4 times per day, based on 00Z, 06Z, 12Z, 18Z model runs. • Note: Current WAFS GRIB1 product suite to remainunchanged.

  5. WAFC Science Meeting 20-21 April 2009 Washington DC. GRIB2 Full Product Suite • Icing (mean and max). 100 hPa thick layers centered at: • 800hPa(FL060), 700hPa (FL100), 600hPa (FL140), 500hPa (FL180), 400hPa (FL240) and 300hPa (FL300). • CAT (mean and max). 50 mb thick layers centered at: • 400hPa(FL240), 350hPa(FL270), 300hPa(FL300), 250hPa(FL340), 200hPa(FL390) and 150hPa(FL450) • In-Cloud Turbulence (mean and max). 100 mb thick layers centered at: • 700hPa (FL100), 600hPa (FL140), 500hPa (FL180), 400hPa (FL240) and 300hPa (FL300). • CB Cloud: • Horizontal extent, Bases, Tops.

  6. WAFC Science Meeting 20-21 April 2009 Washington DC. Web-Based Graphical Output of gridded ICE, TURB, CB. • Primarily intended for WAFS users in Least Developed Countries. • Web-based output is a partial set of the full GRIB2 suite. • 630 products, 4 times a day.

  7. WAFC Science Meeting 20-21 April 2009 Washington DC. 630 Products (pending approval by WAFSOPSG/5) • Valid times: 6, 9, 12, 15, 18, 21, 24 hrs. • (Full GRIB2 suite contains 27, 30, 33, and 36 hrs). • Mean icing: • 700 hPa and 600 hPa (FL100 and 140). • Mean CAT: • 300 hPa, 250 hPa, 200 hPa (FL300, 340, 390) • CB Horizontal Extent, Contoured Tops. • Standard ICAO chart areas.

  8. WAFC Science Meeting 20-21 April 2009 Washington DC. CB Cloud ExtentIsolated, Occasional, Frequent DRAFT ISOL OCNL FRQ

  9. WAFC Science Meeting 20-21 April 2009 Washington DC. Draft CB CloudContoured Tops DRAFT Possible Height Scale 200 250 310 370 430 480

  10. WAFC Science Meeting 20-21 April 2009 Washington DC. High-at-a-Glance SIGWX(Concept - Beta version) (Final version pending approval by WAFSOPSG/5) • Outcome from WAFSOPSG/4 • Conclusion 4/14b) design the gridded forecasts with a high “at a glance” value; • Note. The gridded forecasts do not have to replicate the existing SIGWX forecasts; however, they must provide the same ease of use. • WAFCs propose combining a limited set of gridded IC/TURB/CB elements with Jet Stream. • Suitable for Flight Documentation ?

  11. WAFC Science Meeting 20-21 April 2009 Washington DC. High-at-a-Glance • WAFCs propose the “high-at-a-glance” contain two parts. • High-at-a-glance for SIGWX at High Levels (HG-SWH) • High-at-a-glance for SIGWX at Medium Levels • Drift-down emergency • Loss of cabin pressure • Single-engine operations

  12. WAFC Science Meeting 20-21 April 2009 Washington DC. High-at-a-Glance HIGH Level En-route Cruise • CB Cloud extent, • CAT: FL300-390, • Jet Stream: FL340 >80 kts DRAFT

  13. WAFC Science Meeting 20-21 April 2009 Washington DC. High-at-a-Glance MEDIUM LevelDrift-down Emergency • Icing potential • FL 100 – 140 • Layer 080-160 • CB Cloud extent DRAFT

More Related