KLAX RJTT

Los Angeles International Airport Tokyo Haneda International Airport
Route Information
Departure

KLAX (LAX)

Distance

8,812.4 km (4,758.3 nautical miles)

Arrival

RJTT (HND)

Flight Time

715 minutes (11h 55m)

Flight Profile

Cruise Altitude: 40,000 ft (Flight Level 400)

Route calculated using great circle navigation

Turbulence Comfort Along Route Comfort View
Comfort Score: Combines turbulence probability (GTG forecast) with intensity (ZTI analysis). High scores indicate both high probability AND high intensity turbulence.
Smooth
Comfortable
Noticeable
Uncomfortable
Formula: (Probability × Intensity)
Flight Smoothness Score
8.7 /10
Smoothness
Smooth Flight
52%
Smooth
46%
Light
2%
Moderate
AI-Powered Flight Briefing
📊 17,000 data points analyzed
Advanced AI-Powered Flight Briefing
Your Flight

We analysed more than 17,000 data points along your route from Los Angeles International Airport, Los Angeles to Tokyo Haneda International Airport, Tokyo.

Your Journey Beta

32 minutes into the flight: Some moderate bumps expected.
The crew may adjust altitude or ask you to stay seated during these sections.
The rest of the flight should be smooth.

Your route takes you over the Sierra Nevada and crossing the North Pacific Ocean – these areas can sometimes cause light turbulence.

Smooth Flight

We're expecting smooth conditions throughout your flight. You can sit back and relax.

Takeoff

Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 46 knots. These winds may delay arrival by up to 47 minutes.

Landing

Landing should feel a bit bumpy on descent with typical approach conditions.

You're in Safe Hands

If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.

Relaxation Exercises
Live data from ECMWF global forecast models • 12 atmospheric pressure levels analyzed • Updated every 6 hours
Most Common
SMOOTH
52% of your flight
Peak Intensity
MODERATE
Brief sections only
Route Breakdown (178 zones)
Moderate
4 zones (2%)
Light
82 zones (46%)
Smooth
92 zones (52%)
Forecast Valid: Aug 31, 00:00 UTC (Generated: Aug 31, 00:00 UTC)
Flight Timeline 11h 55min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Moderate
1:00-1:30
Smooth
1:30-2:00
Light
2:00-2:30
Smooth
2:30-3:00
Smooth
3:00-3:30
Light
3:30-4:00
Light
4:00-4:30
Light
4:30-5:00
Light
5:00-5:30
Smooth
5:30-6:00
Light
6:00-6:30
Smooth
6:30-7:00
Light
7:00-7:30
Light
7:30-8:00
Light
8:00-8:30
Light
8:30-9:00
Light
9:00-9:29
Light
9:29-9:58
Light
9:58-10:27
Light
10:27-10:56
Light
10:56-11:25
Moderate
Landing
Moderate
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR
Comparing Two Turbulence Metrics:
  • ZTI (ZeroTurb Index): Our proprietary composite metric (0.0-1.0 scale)
  • EDR (Eddy Dissipation Rate): ICAO/WMO official standard (m^(2/3)/s scale)
ZTI Scale (Custom)
Smooth
<0.2
Light
0.2-0.5
Moderate
0.5-0.75
Severe
>0.75
EDR Scale (ICAO)
Smooth
<0.1
Light
0.1-0.4
Moderate
0.4-0.7
Severe
>0.7

Detailed Analysis Below: While flights generally follow these patterns, our forecast combines ECMWF and NOAA weather data, atmospheric conditions, and pilot reports to build a route-specific picture, updated every 6 hours. Review the detailed metrics and interactive maps below for a comprehensive understanding of expected conditions along your flight path.

How Aircraft Size Affects Your Comfort

Did you know that the size of your aircraft can affect how turbulence feels? Larger, wide-body aircraft have more mass and inertia, which means they absorb turbulent air movements more smoothly. Smaller regional jets and turboprops are lighter, so passengers may feel more noticeable movement during the same turbulence conditions.

Important: All commercial aircraft, regardless of size, are designed and certified to safely handle even severe turbulence. The difference is only in passenger comfort - not safety.

Learn more about how aircraft size affects your turbulence experience
Technical Forecast Details Advanced Analysis

Prefer a simpler overview?

Return to Simplified View
Comprehensive Flight Profile Altitude • Wind • Turbulence

Flight Altitude Profile
  • X-axis: Distance along route (km)
  • Y-axis (left): Aircraft altitude (feet)
  • Blue = Climb phase
  • Green = Cruise phase
  • Orange = Descent phase
Pilot Reports (PIREPs)

Real turbulence reports from pilots who recently flew near your route:

  • Green = Smooth (no turbulence)
  • Yellow = Light turbulence
  • Orange = Moderate turbulence
  • Red = Severe turbulence
Wind Speed
  • Y-axis (right): Wind speed in knots
  • Sudden wind changes often indicate turbulence
  • Hover over points to see wind direction
AI Comfort Forecast
  • Y-axis (right): Comfort Score (0-70)
  • <1 = Smooth (cyan)
  • 1-25 = Light (green)
  • 25-50 = Moderate (orange)
  • >50 = Severe (red)
Tip: Look for areas where multiple indicators coincide (e.g., pilot reports + AI forecast + wind changes) to identify the most likely turbulence zones.
Global Winds Forecast ECMWF Open Data Worldwide Coverage
Route-Specific Forecast: Wind data calculated at 178 waypoints along your flight path using high-resolution ECMWF global weather model (0.25° grid, ~25km resolution).
Minimum Winds
3 kt
3 mph
Average Winds
46 kt
53 mph
Maximum Winds
92 kt
106 mph
Valid: Aug 31, 03:00 UTC
Source: European Centre for Medium-Range Weather Forecasts
Flight Planning: Headwinds increase flight time and fuel consumption. Tailwinds decrease both. Strong crosswinds may affect takeoff/landing at airports.
Wind Impact Analysis FAIR
Wind Assessment: Moderate crosswinds (32 kt avg) may contribute to some turbulence. Headwinds: 31 kt avg.
Route Wind Breakdown
Headwinds
85 zones (48%)
Crosswinds
92 zones (52%)
Moderate headwinds averaging 31 kt - slightly longer than normal
Flight Time Impact
31 kt
Avg Headwind
+47 min
Time Impact
Slower than normal
Wind Range:
• Max Tailwind: 0 kt
• Max Headwind: 70 kt
• Max Crosswind: 64 kt
Wind Speed Along Route ECMWF Forecast
ZeroTurb Index (ZTI) Analysis Custom Algorithm
What is ZTI? Our proprietary ZeroTurb Index combines three meteorological indicators to give you a comprehensive turbulence probability (0.0-1.0 scale). The chart below shows how each component contributes to the overall ZTI along your route:
  • Richardson Number (Ri): Atmospheric stability - lower values indicate CAT risk
  • Wind Shear Index (WSI): Rate of wind speed/direction changes
  • Temperature Gradient Index (TGI): Frontal boundary strength
  • ZTI (Composite): Proprietary composite of the three indices above
ZTI Thresholds: Smooth: 0.0-0.2 Light: 0.2-0.5 Moderate: 0.5-0.75 Severe: 0.75-1.0
Scientific GTG Analysis NOAA Standards
For Aviation Professionals: This section shows turbulence zones using conservative NOAA GTG thresholds. These scientific thresholds are more cautious than the user-friendly "Comfort View" above, which better represents typical passenger experience.

Note: Modern aircraft are designed to handle moderate turbulence effortlessly. What scientific models classify as "moderate" often goes unnoticed by passengers due to advanced flight control systems and aircraft structural design. Most commercial flights encounter some level of atmospheric turbulence that the aircraft manages automatically.
Zone Distribution (Scientific Thresholds)
26%
Smooth (<15%)
46 zones
19%
Light (15-30%)
33 zones
54%
Moderate (30-50%)
97 zones
1%
Severe (≥50% prob)
2 zones
Threshold Comparison
Category Comfort View Scientific (NOAA)
Smooth <20% probability <15% probability
Light 20-50% 15-30%
Moderate 50-75% 30-50%
Severe ≥75% ≥50%
Turbulence Probability Along Route GTG Forecast
Low (0-30%)
Light or no turbulence
Medium (30-50%)
Moderate turbulence likely
High (50-70%)
Moderate-severe expected
Extreme (70-100%)
Severe turbulence
Active Turbulence Warnings (AIRSIGMETs) Loading...
Lightning Activity (Last Hour) Severe Activity

1000

Total Strikes

3 min ago

Latest Strike

Active

Ongoing Activity

1 hour

Time Window
Lightning strikes near your route indicate convective activity (thunderstorms). Active storms detected within the last 15 minutes. Areas with lightning typically have severe turbulence, icing, hail, and strong winds. Avoid these areas by at least 20 nautical miles.
Pilot Reports (PIREPs) - 8 Reports
What are PIREPs? Pilot Reports (PIREPs) are real-time observations from pilots flying the route. They are direct, first-hand reports of actual conditions aloft.
Time (UTC) Intensity Altitude Aircraft Report
Airport Forecasts (TAF) - Next 24-30 Hours
Departure: KLAX
Valid: Aug 31 02:00 - Sep 01 06:00 UTC
02:00 - 04:00 UTC
Wind: 260° at 12 kt
Visibility: 6+ SM
Clouds: SCT 25000 ft
FM 04:00 - 09:00 UTC
Wind: 260° at 6 kt
Visibility: 6+ SM
Clouds: SCT 25000 ft
FM 09:00 - 15:00 UTC
Visibility: 6+ SM
Clouds: SKC
FM 15:00 - 21:00 UTC
Wind: 260° at 6 kt
Visibility: 6+ SM
Clouds: SCT 1200 ft
FM 21:00 - 04:00 UTC
Wind: 260° at 12 kt
Visibility: 6+ SM
Clouds: SKC
FM 04:00 - 06:00 UTC
Wind: 260° at 8 kt
Visibility: 6+ SM
Clouds: SKC
Raw TAF: 
TAF KLAX 310202Z 3102/0106 26012KT P6SM SCT250 FM310400 26006KT P6SM SCT250 FM310900 VRB03KT P6SM SKC FM311500 26006KT P6SM SCT012 FM312100 26012KT P6SM SKC FM010400 26008KT P6SM SKC
Arrival: RJTT
Forecast Valid: Aug 31 00:00 - Sep 01 06:00 UTC
00:00 - 03:00 UTC
Wind: 40° at 6 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 03:00 - 12:00 UTC
Wind: 70° at 14 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 12:00 - 03:00 UTC
Wind: 30° at 10 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
BECMG 03:00 - 06:00 UTC
Wind: 70° at 8 kt
Visibility: 6+
Clouds: FEW at 1500 ft BKN at 3000 ft
Raw TAF: 
TAF RJTT 302305Z 3100/0106 04006KT 9999 FEW015 BKN030 BECMG 3103/3105 07014KT BECMG 3112/3115 03010KT BECMG 0103/0106 07008KT
About TAF: Terminal Area Forecasts (TAF) provide detailed 24-30 hour weather forecasts for airports, including wind, visibility, cloud ceiling, and weather phenomena. Updated every 6 hours by NOAA Aviation Weather Center.
Current Airport Weather (METAR)
Departure: KLAX
Temperature: 23°C (73°F) | Dewpoint: 17°C
Wind: 250° at 9 kt
Sky: FEW10000 (Base: 10000 ft)
Flight Category: VFR
Altimeter: 1011.60 inHg (1011 mb)
Observed: Aug 31 03:53 UTC
Raw METAR: 
METAR KLAX 310353Z 25009KT 10SM FEW100 23/17 A2987 RMK AO2 SLP111 T02280172 $
Arrival: RJTT
Temperature: 27°C (80°F) | Dewpoint: 22°C
Wind: 60° at 10 kt
Sky: FEW2500 BKN3500 BKN4500 (Base: 2500 ft)
Flight Category: VFR
Altimeter: 1014.00 inHg
Observed: Aug 31 03:30 UTC
Raw METAR: 
METAR RJTT 310330Z 06010KT 9999 FEW025 BKN035 BKN045 27/22 Q1014 NOSIG
About METAR: Meteorological Aerodrome Reports (METAR) provide current weather observations from airports, including temperature, wind, visibility, clouds, and atmospheric pressure. Updated hourly by NOAA Aviation Weather Center. Flight Categories: VFR (Good), MVFR (Marginal), IFR (Instrument Flight Rules), LIFR (Low Instrument Flight Rules).
Route Segment Analysis

The route has been divided into segments of approximately 500km each for detailed analysis.

Route Map With GTG Forecast Overlay
Data Sources & Our Approach
ZeroTurb's Custom Algorithm: Unlike generic turbulence forecasts, we've developed a proprietary ZeroTurb Index (ZTI) algorithm that combines three meteorological indices weighted by their predictive accuracy. This gives you transparent, passenger-focused turbulence probability (0.0-1.0 scale) instead of vague categories. Our approach processes raw ECMWF atmospheric data through custom calculations to detect Clear-Air Turbulence (CAT), wind shear zones, and frontal boundaries that cause bumpy rides.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

How accurate are turbulence alerts? Alerts are based on updated forecast models and pilot reports, and can change as departure approaches.

Flight Insights & Recommendations

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