aviation meteorology a northwest airlines perspective tom fahey, manager meteorology american...
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![Page 1: Aviation Meteorology A Northwest Airlines Perspective Tom Fahey, Manager Meteorology American Meteorological Society - Memphis Chapter 20 September 2005](https://reader031.vdocuments.us/reader031/viewer/2022032201/56649d535503460f94a2f769/html5/thumbnails/1.jpg)
Aviation MeteorologyA Northwest Airlines
Perspective
Tom Fahey, Manager MeteorologyAmerican Meteorological Society - Memphis Chapter
20 September 2005Memphis, TN
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MEM September 2005 - 2
Northwest Airlines Perspective
• General Introduction to NWA
• NWA System Operations Control
• NWA Meteorology Roles and Products
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MEM September 2005 - 3
Northwest & KLM Alliance 1990’s
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MEM September 2005 - 4
2004NWA - Member of SkyTeam
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The SOC
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MEM September 2005 - 6
NWASystem Operations Control
SOCSOC•Crew Coord.
•Customer Svc
•Flight Dispatch
•Load Control
•Maintenance
•Meteorology
•Navigation Data
•Ops Planning
•Ops Analysis
•Perf Engineering
Implement, Mitigate &/or Recover
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MEM September 2005 - 7
SOC - Responsibilities Focus on “Day of Operation”
2 Main Causes of Flight Schedule Disruptions • Maintenance• Weather
SOC will take action based on 12hr Fcst - Not a 2 day Fcst
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MEM September 2005 - 8
NWA Meteorology Roles
•Support Efficiency
•Support Safety
•Deliver Useful Products & Services
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MEM September 2005 - 9
NWA Meteorology RolesA Historical Perspective
• 1985 Route Selection & Wind Fcsting
• 1990 Terminal Forecasting & Verification
• 1995 Fcsts Supporting Stn Deicing
• 2000 En Route Tstrms & Air Traffic Mgmnt
• 2000 Tropical Strm Fcst Supporting Stn Ops
• 1985-2005 Fcsts For Turbc Avoidance
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Operational Efficiency
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MEM September 2005 - 11
Operational EfficiencyNWA Historical Perspective
• 1980’s Flight Planning for En Route- Manual Wind Forecasts by Meteorologist
- Route Selection by Meteorologist
• 1990’s Terminal Area Operations- Individual Flight Focus
- Currently 3 TAF’s by NWA & Rest from NWS
• Mid 1990 - Current System Efficiency - CDM (Collaborative Decision Making)
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MEM September 2005 - 12
CCFP (Collaborative Convective Forecast Product)
•1998 Test Lead by NWA•1999 Operational @NWS AWC• Since 2003 Issued every 2 hrs• 2, 4, & 6 Hour Fcsts• Used by Traffic Flow Mngmnt • Collaborative Forecast
- CWSU’s @ FAA ARTCC’s- Environment Canada- Airline Meteorologists- NWS AWC
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MEM September 2005 - 13
CCFP
CCFP Purpose:Identify En Route Airspace Impacted
Significantly.
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MEM September 2005 - 14
Collaborative Decision MakingTstrm Routing - Terminal Area
Flt Dispatchers & Pilots @ an Airline and Air Traffic Managers @ FAA & Airline use Fcsts & Obs to decide on routes around tstrms when departing an airport.
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Safety&
Efficiency
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MEM September 2005 - 16
NWA Meteorology Products
• Fcsts Supporting Safety & Efficiency- Air Traffic Management During Convection
- Station Ops During Deicing
- Station Ops During Tropical Activity
- Clear Air &Terrain Induced Turbc Avoidance
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MEM September 2005 - 17
Preflight Routing-Tstrm Avoid
• Preferred Route for time & burn.
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MEM September 2005 - 18
Preflight Routing-Tstrm Avoid
• White Line most days. Green Line today.
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MEM September 2005 - 19
Station Ops During Deicing
Name this Airport:AMS ?DTW ?IND ?MEM ?MKE ?MSP ?NRT ?
Meteorology Fcsts for 5 NWA hub airports - Which Ones?
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MEM September 2005 - 20
Aviation Safety Requires Deicing
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MEM September 2005 - 21
What Station?
Deicing Fcsts Support Efficiency
• Decision Support- Staffing- Equipment Prep- Flight Thinning
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MEM September 2005 - 22
Winter Weather Depiction
Covers 5 Hub areas & E. Coast stns
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MEM September 2005 - 23
Tropical Weather Depiction
Also Issued for East Pacific (btwn Mexico & HNL), Asia Pacific & India
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MEM September 2005 - 24
Clear & Mtn Wave Turbulence Avoidance
• NWA’s Turbulence Plot System- Meteorologist Forecasting Procedures
- Preflight Graphics & Outlooks- For Route Selection by Dispatchers
- En Route Updates to Dispatchers & Pilots
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MEM September 2005 - 25
1. 700mb wind >30kts - wave develops2. Wave begins to propagate vertically if 500mb/700mb wind ratio 1.5-2.0 & Stable layer at or near Mtn peaks3. Heights begin packing near surface4. Upper level waves reach tropopause & begin to break and reflect back down5. Downslope windstorm ensues.
700mb
1.
2.
3.
4.
5.
Vertical Propagating Breaking Waves
.
Waves:Step 1Starts @Mt Peaks
Step 2 & 3 Develops Vertically
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MEM September 2005 - 26
SevereRotor turb
Vertically propagatingBreaking mountain wave
Turbulence (+)
Mountain topStable layer
2 Layers ofFocus
Mtn Wave Fcst Procedures Model
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MEM September 2005 - 27
Preflight GraphicsA General Overview
CAT & Mtn Waves
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MEM September 2005 - 28
The Turbulence Plot Messages
• The Details- Continuous
Updates
• Preflight Graphics- For Pilot &
Dispatcher
• En Route Updates- For Dispatcher
& Text for Pilot
• 8 Hazards Including Including Clear & Mtn Wave Turbc
Dispatchers’ ToolASD
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MEM September 2005 - 29
The Turbulence Plot MessagesPilots’ Tool
Web Wx
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Conclusion
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MEM September 2005 - 31
Safety & Efficiency
• Driven by Conditions at Airport & TAF- TAF Ceiling & Visibility: Require Fuel for an
Alternate
- Airport Congestion: Snow, Tstrms or Wind Velocity
• Driven by Conditions En Route-Air Traffic Mngmt & Congestion During Convection
-Clear Air &Terrain Induced Turbce Avoidance
-Convection Hazard Avoidance
Fuel Loading Decisions
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Questions?