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

705 minutes (11h 45m)

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
8.0 /10
Smoothness
Smooth Flight
25%
Smooth
71%
Light
3%
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

2 hours, 2 hours, and 10 hours 25 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 58 knots. These winds may delay arrival by up to 66 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
LIGHT
71% of your flight
Peak Intensity
MODERATE
Comfortable flight expected
Route Breakdown (178 zones)
Moderate
6 zones (3%)
Light
127 zones (71%)
Smooth
45 zones (25%)
Forecast Valid: Jun 01, 18:00 UTC (Generated: Jun 01, 18:00 UTC)
Flight Timeline 11h 45min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Smooth
1:00-1:30
Light
1:30-2:00
Moderate
2:00-2:30
Moderate
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Light
4:00-4:29
Light
4:29-4:58
Light
4:58-5:27
Light
5:27-5:56
Light
5:56-6:25
Light
6:25-6:54
Light
6:54-7:23
Light
7:23-7:52
Light
7:52-8:21
Light
8:21-8:50
Light
8:50-9:19
Light
9:19-9:48
Light
9:48-10:17
Light
10:17-10:46
Moderate
10:46-11:15
Light
Landing
Light
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 advanced turbulence prediction system analyzes real-time weather data, atmospheric conditions, and pilot reports to provide you with precise, route-specific forecasts. 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

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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
11 kt
13 mph
Average Winds
58 kt
67 mph
Maximum Winds
114 kt
132 mph
Valid: Jun 02, 00:00 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 headwinds (42 kt avg) will moderately increase flight time. This is typical for this route.
Route Wind Breakdown
Headwinds
111 zones (62%)
Crosswinds
66 zones (37%)
Moderate headwinds averaging 42 kt - slightly longer than normal
Flight Time Impact
42 kt
Avg Headwind
+66 min
Time Impact
Slower than normal
Wind Range:
• Max Tailwind: 0 kt
• Max Headwind: 95 kt
• Max Crosswind: 100 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)
12%
Smooth (<15%)
21 zones
11%
Light (15-30%)
19 zones
76%
Moderate (30-50%)
135 zones
2%
Severe (≥50% prob)
3 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

227

Total Strikes

2 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) - 2 Reports
What are PIREPs? Pilot Reports (PIREPs) are real-time observations from pilots flying the route. They provide the most accurate turbulence information available.
Time (UTC) Intensity Altitude Aircraft Report
Airport Forecasts (TAF) - Next 24-30 Hours
Departure: KLAX
Valid: Jun 01 21:00 - Jun 03 00:00 UTC
21:00 - 03:00 UTC
Wind: 250° at 12 kt
Visibility: 6+ SM
Clouds: FEW 2500 ft
FM 03:00 - 06:00 UTC
Wind: 250° at 6 kt
Visibility: 6+ SM
Clouds: BKN 1000 ft
FM 06:00 - 18:00 UTC
Visibility: 6+ SM
Clouds: BKN 800 ft
FM 18:00 - 21:00 UTC
Wind: 250° at 6 kt
Visibility: 6+ SM
Clouds: SCT 1200 ft
FM 21:00 - 00:00 UTC
Wind: 260° at 12 kt
Visibility: 6+ SM
Clouds: SCT 25000 ft
Raw TAF: 
TAF KLAX 012058Z 0121/0224 25012KT P6SM FEW025 FM020300 25006KT P6SM BKN010 FM020600 VRB03KT P6SM BKN008 FM021800 25006KT P6SM SCT012 FM022100 26012KT P6SM SCT250
Arrival: RJTT
Forecast Valid: Jun 01 18:00 - Jun 03 00:00 UTC
18:00 - 12:00 UTC
Wind: 200° at 16 kt
Visibility: 6+
Clouds: FEW at 3000 ft
18:00 - 12:00 UTC
Wind: 200° at 16 kt
Visibility: 6+
Clouds: FEW at 3000 ft
BECMG 12:00 - 18:00 UTC
Wind: 80° at 16 kt
Visibility: 6+
Clouds: FEW at 3000 ft
TEMPO 12:00 - 18:00 UTC
Visibility: 1.86
Weather: SHRA BR
Clouds: FEW at 500 ft BKN at 800 ft
BECMG 12:00 - 18:00 UTC
Wind: 80° at 16 kt
Visibility: 6+
Clouds: FEW at 3000 ft
TEMPO 12:00 - 18:00 UTC
Visibility: 1.86
Weather: SHRA BR
Clouds: FEW at 500 ft BKN at 800 ft
BECMG 18:00 - 00:00 UTC
Wind: 80° at 26 kt
Visibility: 6+
Clouds: FEW at 3000 ft
TEMPO 18:00 - 00:00 UTC
Wind: 80° at 34 kt gusting to 46 kt
Visibility: 0.93
Weather: +SHRA BR
Clouds: FEW at 300 ft BKN at 500 ft
BECMG 18:00 - 00:00 UTC
Wind: 80° at 26 kt
Visibility: 6+
Clouds: FEW at 3000 ft
TEMPO 18:00 - 00:00 UTC
Wind: 80° at 34 kt gusting to 46 kt
Visibility: 0.93
Weather: +SHRA BR
Clouds: FEW at 300 ft BKN at 500 ft
Raw TAF: 
TAF RJTT 011705Z 0118/0300 20016KT 9999 FEW030 BECMG 0212/0215 08016KT TEMPO 0212/0218 3000 SHRA BR FEW005 BKN008 BECMG 0218/0221 08026KT TEMPO 0218/0300 08034G46KT 1500 +SHRA BR FEW003 BKN005
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: 21°C (69°F) | Dewpoint: 13°C
Wind: 250° at 13 kt
Sky: CLR
Flight Category: VFR
Altimeter: 1014.00 inHg (1014 mb)
Observed: Jun 01 22:53 UTC
Raw METAR: 
METAR KLAX 012253Z 25013KT 10SM CLR 21/13 A2994 RMK AO2 SLP138 T02110133 $
Arrival: RJTT
Temperature: 25°C (77°F) | Dewpoint: 17°C
Wind: 180° at 12 kt
Sky: FEW3000 (Base: 3000 ft)
Flight Category: VFR
Altimeter: 1017.00 inHg
Observed: Jun 01 23:30 UTC
Raw METAR: 
METAR RJTT 012330Z 18012KT 9999 FEW030 BKN/// 25/17 Q1017 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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