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Use Open-Meteo for wind data in Vandy and Cape weather endpoints #1

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Use Open-Meteo for wind data in Vandy and Cape weather endpoints #1

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fc7ec92
Initial plan
Copilot Feb 9, 2026
6c52b4f
Update wind data source for Vandy and Cape to use Open-Meteo
Copilot Feb 9, 2026
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113 changes: 88 additions & 25 deletions app.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1249,6 +1249,47 @@ def parse_metar(raw_metar: str):
'raw': raw_metar
}

def fetch_open_meteo_wind(location: str):
"""Fetch current wind data from Open-Meteo API for Vandy and Cape."""
increment_metric("api_calls")
coords = {
'Starbase': (25.997, -97.156),
'Vandy': (34.742, -120.572),
'Cape': (28.483, -80.577),
'Hawthorne': (33.921, -118.330)
}
lat, lon = coords.get(location, (25.997, -97.156))
# Request current conditions plus hourly data
url = f"https://api.open-meteo.com/v1/forecast?latitude={lat}&longitude={lon}&current=windspeed_10m,winddirection_10m,windgusts_10m&timezone=auto"

try:
response = requests.get(url, timeout=10)
response.raise_for_status()
data = response.json()

current = data.get('current', {})
wind_speed_kmh = current.get('windspeed_10m') # km/h
wind_gust_kmh = current.get('windgusts_10m') # km/h
wind_direction = current.get('winddirection_10m') # degrees
timestamp = current.get('time')

result = {}
if wind_speed_kmh is not None:
# Convert km/h to knots (1 km/h = 0.539957 knots)
result['speed_kts'] = round(wind_speed_kmh * 0.539957, 1)
if wind_gust_kmh is not None:
result['gust_kts'] = round(wind_gust_kmh * 0.539957, 1)
if wind_direction is not None:
result['direction'] = int(wind_direction)

result['timestamp'] = timestamp
result['source'] = 'Open-Meteo Real-time'

return result
except Exception as e:
print(f"Error fetching Open-Meteo wind for {location}: {e}")
return {}

def fetch_forecast(location: str):
"""Fetch 7-day forecast (daily + hourly) from Open-Meteo."""
increment_metric("api_calls")
Expand Down Expand Up @@ -1280,31 +1321,39 @@ def fetch_weather(location: str):
}
station_id = metar_stations.get(location, 'KBRO')

# Try to fetch live wind from NWS API for higher frequency (often includes SPECI or more frequent updates)
# Determine which wind data source to use
use_open_meteo_wind = location in ['Vandy', 'Cape']

# Try to fetch live wind data
live_wind = {}
try:
# User-Agent is required for NWS API
nws_headers = {'User-Agent': '(my-launch-app, contact@example.com)'}
nws_url = f"https://api.weather.gov/stations/{station_id}/observations/latest"
nws_res = requests.get(nws_url, headers=nws_headers, timeout=5)
if nws_res.status_code == 200:
nws_data = nws_res.json().get('properties', {})
wind_speed = nws_data.get('windSpeed', {}).get('value') # km/h
wind_gust = nws_data.get('windGust', {}).get('value') # km/h
wind_dir = nws_data.get('windDirection', {}).get('value') # degrees

if wind_speed is not None:
# NWS API returns speed in km/h (wmoUnit:km_h-1)
live_wind['speed_kts'] = round(wind_speed * 0.539957, 1)
if wind_gust is not None:
live_wind['gust_kts'] = round(wind_gust * 0.539957, 1)
if wind_dir is not None:
live_wind['direction'] = int(wind_dir)

live_wind['timestamp'] = nws_data.get('timestamp')
live_wind['source'] = 'NWS Real-time'
except Exception as e:
print(f"Error fetching NWS live wind for {location}: {e}")
if use_open_meteo_wind:
# For Vandy and Cape, use Open-Meteo for wind data (same source as long-term forecasting)
live_wind = fetch_open_meteo_wind(location)
else:
# For other locations, use NWS API for higher frequency updates
try:
# User-Agent is required for NWS API
nws_headers = {'User-Agent': '(my-launch-app, contact@example.com)'}
nws_url = f"https://api.weather.gov/stations/{station_id}/observations/latest"
nws_res = requests.get(nws_url, headers=nws_headers, timeout=5)
if nws_res.status_code == 200:
nws_data = nws_res.json().get('properties', {})
wind_speed = nws_data.get('windSpeed', {}).get('value') # km/h
wind_gust = nws_data.get('windGust', {}).get('value') # km/h
wind_dir = nws_data.get('windDirection', {}).get('value') # degrees

if wind_speed is not None:
# NWS API returns speed in km/h (wmoUnit:km_h-1)
live_wind['speed_kts'] = round(wind_speed * 0.539957, 1)
if wind_gust is not None:
live_wind['gust_kts'] = round(wind_gust * 0.539957, 1)
if wind_dir is not None:
live_wind['direction'] = int(wind_dir)

live_wind['timestamp'] = nws_data.get('timestamp')
live_wind['source'] = 'NWS Real-time'
except Exception as e:
print(f"Error fetching NWS live wind for {location}: {e}")

url = f"https://aviationweather.gov/api/data/metar?ids={station_id}&format=raw"
try:
Expand All @@ -1315,8 +1364,22 @@ def fetch_weather(location: str):
raise ValueError("Empty METAR response")

parsed = parse_metar(raw_metar)
if live_wind:

# For Vandy and Cape, override wind data from METAR with Open-Meteo data
if use_open_meteo_wind and live_wind:
# Update the main wind fields with Open-Meteo data
if 'speed_kts' in live_wind:
parsed['wind_speed_kts'] = int(live_wind['speed_kts'])
if 'gust_kts' in live_wind:
parsed['wind_gust_kts'] = int(live_wind['gust_kts'])
if 'direction' in live_wind:
parsed['wind_direction'] = live_wind['direction']
# Also add as live_wind for UI display
parsed['live_wind'] = live_wind
elif live_wind:
# For other locations, add NWS live wind as supplementary data
parsed['live_wind'] = live_wind

return parsed
except Exception as e:
print(f"Error fetching weather for {location}: {e}")
Expand Down