Presentation is loading. Please wait.

Presentation is loading. Please wait.

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

Similar presentations


Presentation on theme: "Web-Based Graphical Output of WAFS Gridded Icing, Turbulence, Cumulonimbus Cloud. Larry Burch, WAFC Washington Nigel Gait, WAFC London WAFC Science Meeting."— Presentation transcript:

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

2 WAFS Gridded ICE, TURB, CB Three Output Components 1.GRIB2 The full product suite 2.Web-based graphics Limited set of products 3.High-at-a-Glance Minimum set of products WAFC Science Meeting April 2009 Washington DC.

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

4 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 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 remain unchanged. WAFC Science Meeting April 2009 Washington DC.

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

6 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. WAFC Science Meeting April 2009 Washington DC.

7 630 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. WAFC Science Meeting April 2009 Washington DC.

8 CB Cloud Extent Isolated, Occasional, Frequent WAFC Science Meeting April 2009 Washington DC. ISOLFRQOCNL DRAFT

9 Draft CB Cloud Contoured Tops WAFC Science Meeting April 2009 Washington DC Possible Height Scale DRAFT

10 High-at-a-Glance SIGWX (Concept - Beta version) (Final version pending approval by WAFSOPSG/5) Outcome from WAFSOPSG/4 –Conclusion 4/14 b) 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 ? WAFC Science Meeting April 2009 Washington DC.

11 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 WAFC Science Meeting April 2009 Washington DC.

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

13 High-at-a-Glance MEDIUM Level Drift-down Emergency Icing potential –FL 100 – 140 –Layer CB Cloud extent WAFC Science Meeting April 2009 Washington DC. DRAFT


Download ppt "Web-Based Graphical Output of WAFS Gridded Icing, Turbulence, Cumulonimbus Cloud. Larry Burch, WAFC Washington Nigel Gait, WAFC London WAFC Science Meeting."

Similar presentations


Ads by Google