La Grande-4 Airport

CYAH / YAH

La Grande-4, CA

Last Updated
Apr 15, 21:00Z

Current Weather

Display Units
Recent 44 min ago
21:00Z

🌙 Night
VFR
Flight Rules
4°C
Temperature
Dewpoint: -4°C
13 kt
230°
9 SM
Visibility
3,500 ft
Ceiling
Above Ground Level
1008 hPa
QNH
Altimeter Setting

Raw METAR

METAR CYAH 152100Z AUTO 23013KT 9SM OVC035 04/M04 A2976 RMK SLP104

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 1,005 ft
OVC 3,500 ft AGL
☁️
OVC
Overcast (8/8 sky coverage)
3,500 ft
AGL (Above Ground)
4,505 ft AMSL

Weather Briefing

VFR

La Grande-4 Airport is currently reporting visual flight rules (VFR) conditions with overcast skies at 3,500 feet and 9 SM visibility.

Wind Analysis

Winds are from the southwest (230°) at 13 knots. Runway 27 is favored with a 10-knot headwind and 8-knot crosswind component.

Visibility & Ceiling

Visibility is 9 SM. The ceiling is 3500 feet AGL (overcast), well above standard VFR minimums.

Temperature & Moisture

Temperature is 4°C (39°F) with a dewpoint of -4°C, indicating moderate moisture conditions.

Forecast Outlook

The TAF forecast covers the next 3 hours. Conditions are expected to remain MVFR throughout the forecast period. Expected weather includes: FCST, FCST. Temporary MVFR conditions are forecast with FCST, FCST between 18:00Z and 21:00Z.

Pilot Recommendations

Conditions are favorable for visual flight. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
1008 hPa
Sea Level Pressure
For altitude above MSL
QFE
975 hPa
Field Pressure
Height above aerodrome (1,005 ft)
Pressure Alt
1,163 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 84 ft
ISA Deviation: -9.0°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF CYAH 151740Z 1518/1521 22010G20KT P6SM BKN020 TEMPO 1518/1521 BKN025 RMK FCST BASED ON AUTO OBS. NXT FCST BY 161100Z
Upcoming Changes (Next 12 Hours)
21:43Z BASE
+0h
MVFR 220° 10 kt
Visibility: >6SM
Ceiling: 2,000 ft

24-Hour Weather Evolution

Loading weather data...
Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
Chart Features
  • • Hover for exact values and timestamps
  • • Click legend items to toggle data series
  • • Zoom and pan for detailed analysis
  • • Units automatically converted to preferences
Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
YAH
09
27 ✈️

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 09/27
Active: 27
5,000 ft 150 ft GRAVEL
10.0 kt 8.4 kt
40° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - CYAH

11,571 observations | Sep 2025 - Apr 2026

Flight Rules Distribution

VFR
34.2%
MVFR
52.4%
IFR
12.5%
LIFR
0.8%

La Grande-4 Airport is frequently affected by reduced visibility conditions, with VFR weather only 34.2% of the time and IFR/LIFR conditions occurring in 13.3% of observations. Prevailing winds are from the W averaging 9.2 knots. Temperature extremes range from -37°C to 23°C, reflecting significant seasonal variation. Low visibility conditions (below 3 SM) occur in 6% of weather observations. The best months for VFR flying are February, March, April.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 9.2 kt
Maximum Recorded: 26 kt
Calm Winds: 5.7%
Direction Distribution:
N
2.9%
NE
6%
E
7%
SE
2.6%
S
11.5%
SW
29.4%
W
30%
NW
4.9%

Temperature Range

Average: -10.6°C
Range: -37°C to 23°C
-37°C 23°C

Visibility

Average: 7.1 SM
Below 3 SM: 6%
Fog Frequency: 0.1%

Best Months for VFR

February March April

Runway Wind Analysis

Runway 09/27
Favorable wind: 100%
Avg crosswind: 4.7 kt

Statistics computed from 11,571 METAR observations (Sep 2025 - Apr 2026). Data sourced from official aviation weather services. Updated daily.

La Grande-4 Airport - Airport Information

Airport Details

ICAO Code: CYAH
IATA Code: YAH
Type: medium airport
Status: active
Elevation: 1,005 ft MSL

Location

City: La Grande-4
Country: CA
Latitude: 53.754700°
Longitude: -73.675301°
Time Zone: Etc/GMT+5

Runway Information

Runway 09/27
Length: 5,000 ft
Width: 150 ft
Surface: GRAVEL
ILS: No

About La Grande-4 Airport

Overview

La Grande-4 Airport serves the remote region of northern Quebec, situated at an elevation of 1005 ft MSL. Located at coordinates 53.754700, -73.675301, this medium-sized airport provides critical transportation infrastructure in a challenging northern environment. The airport's single gravel runway supports essential regional and resource-sector air operations.

Flying Conditions

Pilots should anticipate variable weather conditions, with marginal VFR (MVFR) dominating 53.7% of observations. Temperature ranges dramatically from -33°C to 23°C, with an average of -7.2°C, presenting significant potential for icing and temperature-related performance considerations. Wind is predominantly southwest at 9.1 knots, with occasional gusts up to 26 knots and calm periods occurring 4.8% of the time.

Notable Features

The 5000-foot gravel runway (09/27) presents unique operational challenges typical of northern Canadian airports. Gravel surface requires heightened awareness of potential foreign object damage (FOD) and modified landing/takeoff techniques. The airport's geographical position suggests potential terrain complexity and rapid weather changes characteristic of northern Quebec's landscape.

Approach Considerations

Runway 09/27 demonstrates 100% favorable wind alignment, with an average crosswind of only 4.8 knots. Pilots should note best VFR months are October, January, and September, with visibility averaging 7.1 statute miles. During approach, be prepared for potential reduced visibility, with 5.6% of observations showing visibility below 3 statute miles.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.