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Aviation Meteorology A Northwest Airlines Perspective. Tom Fahey, Manager Meteorology American Meteorological Society - Memphis Chapter 20 September 2005 Memphis, TN. Northwest Airlines Perspective. General Introduction to NWA NWA System Operations Control

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aviation meteorology a northwest airlines perspective

Aviation MeteorologyA Northwest Airlines Perspective

Tom Fahey, Manager Meteorology

American Meteorological Society - Memphis Chapter

20 September 2005

Memphis, TN

northwest airlines perspective
Northwest Airlines Perspective
  • General Introduction to NWA
  • NWA System Operations Control
  • NWA Meteorology Roles and Products
slide4

2004

NWA - Member of SkyTeam

nwa system operations control
NWASystem Operations Control

SOC

•Crew Coord.

•Customer Svc

•Flight Dispatch

•Load Control

•Maintenance

•Meteorology

•Navigation Data

•Ops Planning

•Ops Analysis

•Perf Engineering

Implement, Mitigate &/or Recover

soc responsibilities focus on day of operation
SOC - ResponsibilitiesFocus 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

nwa meteorology roles
NWA Meteorology Roles
  • Support Efficiency
  • Support Safety
  • Deliver Useful Products & Services
nwa meteorology roles a historical perspective
NWA Meteorology RolesA Historical Perspective

• 1985 Route Selection & Wind Fcsting

• 1990Terminal 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

operational efficiency nwa historical perspective
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)
ccfp collaborative convective forecast product
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
slide13
CCFP

CCFP Purpose:

Identify En Route

Airspace Impacted

Significantly.

collaborative decision making tstrm routing terminal area
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.
nwa meteorology products
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
preflight routing tstrm avoid
Preflight Routing-Tstrm Avoid
  • Preferred Route for time & burn.
preflight routing tstrm avoid18
Preflight Routing-Tstrm Avoid
  • White Line most days. Green Line today.
station ops during deicing
Station Ops During Deicing

Name this

Airport:

AMS ?

DTW ?

IND ?

MEM ?

MKE ?

MSP ?

NRT ?

Meteorology Fcsts for 5 NWA hub airports - Which Ones?

deicing fcsts support efficiency
Deicing Fcsts Support Efficiency
  • Decision Support
    • Staffing
    • Equipment Prep
    • Flight Thinning

What Station?

winter weather depiction
Winter Weather Depiction

Covers 5 Hub areas & E. Coast stns

tropical weather depiction
Tropical Weather Depiction

Also Issued for East Pacific (btwn Mexico & HNL), Asia Pacific & India

clear mtn wave turbulence avoidance
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
slide25

.

Vertical Propagating Breaking Waves

1. 700mb wind >30kts - wave develops

2. Wave begins to propagate vertically if

500mb/700mb wind ratio 1.5-2.0 &

Stable layer at or near Mtn peaks

3. Heights begin packing near surface

4. Upper level waves reach tropopause &

begin to break and reflect back down

5. Downslope windstorm ensues.

4.

2.

Waves:

Step 1

Starts @

Mt Peaks

1.

700mb

3.

5.

Step 2 & 3 Develops Vertically

slide26

Mtn Wave Fcst Procedures Model

Turbulence (+)

Mountain top

Stable layer

Severe

Rotor turb

2 Layers of

Focus

Vertically propagating

Breaking mountain wave

the turbulence plot messages
The Turbulence Plot Messages

Dispatchers’ Tool

ASD

  • 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

safety efficiency31
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