meteo-lt-pkg 0.6.0

A library to fetch weather data from api.meteo.lt

Meteo.Lt Lithuanian weather forecast package

MeteoLt-Pkg is a Python library designed to fetch weather data from api.meteo.lt. This library provides convenient methods to interact with the API and obtain weather forecasts and related data. Please visit for more information.

Requirements

• Python 3.11 or higher
• aiohttp 3.13 or higher

Installation

You can install the package using pip:

pip install meteo_lt-pkg

Quick Start

Here's a quick example to get you started:

import asyncio
from meteo_lt import MeteoLtAPI

async def quick_example():
    async with MeteoLtAPI() as api:
        # Get current weather for Vilnius
        forecast = await api.get_forecast("vilnius")
        current = forecast.current_conditions

        print(f"Current temperature in Vilnius: {current.temperature}°C")
        print(f"Condition: {current.condition_code}")
        print(f"Wind: {current.wind_speed} m/s")

        # Check for weather warnings
        warnings = await api.get_weather_warnings("Vilniaus miesto")
        if warnings:
            print(f"Active warnings: {len(warnings)}")
            for warning in warnings:
                print(f"   - {warning.warning_type}: {warning.severity}")
        else:
            print("No active weather warnings")

asyncio.run(quick_example())

Usage

Basic Usage (Recommended)

The recommended way to use the library is with the async with context manager, which ensures proper cleanup of HTTP sessions:

import asyncio
from meteo_lt import MeteoLtAPI

async def main():
    async with MeteoLtAPI() as api:
        # Get weather forecast for Vilnius
        forecast = await api.get_forecast("vilnius")
        print(f"Current temperature in {forecast.place.name}: {forecast.current_conditions.temperature}°C")

        # Get weather warnings for Vilnius
        warnings = await api.get_weather_warnings("Vilniaus miesto")
        print(f"Active warnings: {len(warnings)}")
        for warning in warnings:
            print(f"- {warning.warning_type}: {warning.description}")

asyncio.run(main())

Alternative Usage

If you prefer not to use the context manager, make sure to call close() to properly cleanup resources:

async def alternative_usage():
    api = MeteoLtAPI()
    try:
        forecast = await api.get_forecast("kaunas")
        print(f"Temperature: {forecast.current_conditions.temperature}°C")
    finally:
        await api.close()  # Important: prevents session warnings

asyncio.run(alternative_usage())

Fetching Places

To get the list of available places:

async def fetch_places():
    async with MeteoLtAPI() as api:
        await api.fetch_places()
        for place in api.places:
            print(f"{place.name} ({place.code})")

asyncio.run(fetch_places())

Getting the Nearest Place

You can find the nearest place using latitude and longitude coordinates:

async def find_nearest_place():
    async with MeteoLtAPI() as api:
        # Example coordinates for Vilnius, Lithuania
        nearest_place = await api.get_nearest_place(54.6872, 25.2797)
        print(f"Nearest place: {nearest_place.name}")

asyncio.run(find_nearest_place())

NOTE: If no places are retrieved before, that is done automatically in get_nearest_place method.

Fetching Weather Forecast

To get the weather forecast for a specific place:

async def fetch_forecast():
    async with MeteoLtAPI() as api:
        # Get forecast for Vilnius (warnings included by default)
        forecast = await api.get_forecast("vilnius")

        # Current conditions
        current = forecast.current_conditions
        print(f"Current temperature: {current.temperature}°C")
        print(f"Feels like: {current.apparent_temperature}°C")
        print(f"Condition: {current.condition_code}")

        # Check for warnings (automatically included)
        if current.warnings:
            print(f"\nActive warnings: {len(current.warnings)}")
            for warning in current.warnings:
                print(f"- {warning.warning_type}: {warning.severity}")

        # Future forecasts
        print(f"\nNext 24 hours:")
        for timestamp in forecast.forecast_timestamps[:24]:
            print(f"{timestamp.datetime}: {timestamp.temperature}°C")

asyncio.run(fetch_forecast())

NOTE: Weather and hydrological warnings are automatically included in forecast data by default. To exclude warnings, use get_forecast(place_code, include_warnings=False).

NOTE: current_conditions is the current hour record from the forecast_timestamps array. Also, forecast_timestamps array has past time records filtered out due to api.meteo.lt not doing that automatically.

Fetching Weather Forecast with Warnings

To get weather forecast enriched with warnings:

async def fetch_forecast_with_warnings():
    async with MeteoLtAPI() as api:
        # Get forecast with warnings using coordinates
        forecast = await api.get_forecast_with_warnings(
            latitude=54.6872,
            longitude=25.2797
        )

        print(f"Forecast for {forecast.place.name}")
        print(f"Current temperature: {forecast.current_conditions.temperature}°C")

        # Check for warnings in current conditions
        if forecast.current_conditions.warnings:
            print("Current warnings:")
            for warning in forecast.current_conditions.warnings:
                print(f"- {warning.warning_type}: {warning.severity}")

asyncio.run(fetch_forecast_with_warnings())

Fetching Weather Warnings

To get weather warnings for Lithuania or specific administrative areas:

async def fetch_warnings():
    async with MeteoLtAPI() as api:
        # Get all weather warnings
        warnings = await api.get_weather_warnings()
        print(f"Total active warnings: {len(warnings)}")

        for warning in warnings:
            print(f"Warning: {warning.warning_type} in {warning.county}")
            print(f"Severity: {warning.severity}")
            print(f"Description: {warning.description}")
            if warning.instruction:
                print(f"Instruction: {warning.instruction}")
            print(f"Active: {warning.start_time} to {warning.end_time}")
            print("-" * 50)

async def fetch_warnings_for_area():
    async with MeteoLtAPI() as api:
        # Get warnings for specific administrative division
        vilnius_warnings = await api.get_weather_warnings("Vilniaus miesto")
        print(f"Warnings for Vilnius: {len(vilnius_warnings)}")

        for warning in vilnius_warnings:
            print(f"- {warning.warning_type} ({warning.severity})")

asyncio.run(fetch_warnings())
asyncio.run(fetch_warnings_for_area())

Fetching Hydrological Warnings

To get hydrological warnings (water-related warnings like floods, high water levels):

async def fetch_hydro_warnings():
    async with MeteoLtAPI() as api:
        # Get all hydrological warnings
        hydro_warnings = await api.get_hydro_warnings()
        print(f"Total active hydro warnings: {len(hydro_warnings)}")

        for warning in hydro_warnings:
            print(f"Hydro Warning: {warning.warning_type} in {warning.county}")
            print(f"Severity: {warning.severity}")
            print(f"Description: {warning.description}")
            if warning.instruction:
                print(f"Instruction: {warning.instruction}")
            print("-" * 50)

async def fetch_hydro_warnings_for_area():
    async with MeteoLtAPI() as api:
        # Get hydro warnings for specific administrative division
        warnings = await api.get_hydro_warnings("Vilniaus miesto")
        print(f"Hydro warnings for Vilnius: {len(warnings)}")

asyncio.run(fetch_hydro_warnings())
asyncio.run(fetch_hydro_warnings_for_area())

Fetching All Warnings (Weather + Hydrological)

To get both weather and hydrological warnings combined:

async def fetch_all_warnings():
    async with MeteoLtAPI() as api:
        # Get all warnings (weather + hydrological)
        all_warnings = await api.get_all_warnings()
        print(f"Total active warnings (all types): {len(all_warnings)}")

        for warning in all_warnings:
            print(f"{warning.warning_type} in {warning.county}")
            print(f"Severity: {warning.severity}")
            print(f"Description: {warning.description}")
            if warning.instruction:
                print(f"Instruction: {warning.instruction}")
            print("-" * 50)

async def fetch_all_warnings_for_area():
    async with MeteoLtAPI() as api:
        # Get all warnings for specific administrative division
        warnings = await api.get_all_warnings("Vilniaus miesto")
        print(f"All warnings for Vilnius: {len(warnings)}")

        # Separate by type if needed
        weather_count = sum(1 for w in warnings if w.category == "weather")
        hydro_count = sum(1 for w in warnings if w.category == "hydro")
        print(f"  Weather warnings: {weather_count}")
        print(f"  Hydro warnings: {hydro_count}")

asyncio.run(fetch_all_warnings())
asyncio.run(fetch_all_warnings_for_area())

Data Models

The package includes several data models to represent the API responses:

Coordinates

Represents geographic coordinates.

from meteo_lt import Coordinates

coords = Coordinates(latitude=54.6872, longitude=25.2797)
print(coords)

Place

Represents a place with associated metadata.

from meteo_lt import Place

place = Place(
    code="vilnius",
    name="Vilnius",
    administrative_division="Vilniaus miesto",
    country_code="LT",
    coordinates=coords
)
print(place.latitude, place.longitude)
print(place.counties)  # List of counties this place belongs to

ForecastTimestamp

Represents a timestamp within the weather forecast, including various weather parameters.

from meteo_lt import ForecastTimestamp

forecast_timestamp = ForecastTimestamp(
    datetime="2024-07-23T12:00:00+00:00",
    temperature=25.5,
    apparent_temperature=27.0,
    condition_code="clear",
    wind_speed=5.0,
    wind_gust_speed=8.0,
    wind_bearing=180,
    cloud_coverage=20,
    pressure=1012,
    humidity=60,
    precipitation=0
)
print(f"Temperature: {forecast_timestamp.temperature}°C")
print(f"Condition: {forecast_timestamp.condition_code}")
# Warnings list is automatically populated when using get_forecast_with_warnings()
print(f"Warnings: {len(forecast_timestamp.warnings)}")

Forecast

Represents the weather forecast for a place, containing multiple forecast timestamps.

from meteo_lt import Forecast

forecast = Forecast(
    place=place,
    forecast_created="2024-07-23T12:00:00+00:00",
    current_conditions=forecast_timestamp,
    forecast_timestamps=[forecast_timestamp]
)
# current_conditions is automatically set to the current hour's forecast
print(f"Current temperature: {forecast.current_conditions.temperature}°C")
# forecast_timestamps are automatically filtered to exclude past hours
print(f"Future forecasts: {len(forecast.forecast_timestamps)}")

MeteoWarning

Represents a meteorological warning (weather or hydrological) for a specific area.

from meteo_lt import MeteoWarning

# Weather warning example
weather_warning = MeteoWarning(
    county="Vilniaus apskritis",
    warning_type="frost",
    severity="Moderate",
    description="Ground surface frost 0-5 degrees in many places",
    instruction="Protect sensitive plants and be cautious on roads",  # Optional safety instruction
    category="weather",
    start_time="2024-07-23T12:00:00Z",
    end_time="2024-07-23T18:00:00Z"
)
print(f"Warning for {weather_warning.county}: {weather_warning.description}")
if weather_warning.instruction:
    print(f"Safety instruction: {weather_warning.instruction}")
print(f"Category: {weather_warning.category}")  # "weather" or "hydro"

# Hydrological warning example
hydro_warning = MeteoWarning(
    county="Kauno apskritis",
    warning_type="flood",
    severity="High",
    description="High water levels expected",
    instruction="Avoid low-lying areas and do not attempt to cross flooded roads",  # Optional
    category="hydro",
    start_time="2024-07-23T12:00:00Z",
    end_time="2024-07-24T12:00:00Z"
)

HydroStation

Represents a hydrological observation station with water body information.

from meteo_lt import HydroStation

station = HydroStation(
    code="klaipedos-juru-uosto-vms",
    name="Klaipėdos jūrų uosto VMS",
    water_body="Baltijos jūra",
    coordinates=coords
)
print(f"Station: {station.name} on {station.water_body}")

HydroObservation

Represents a single hydrological observation with water measurements.

from meteo_lt import HydroObservation

observation = HydroObservation(
    observation_datetime="2024-07-23T12:00:00+00:00",
    water_level=481.8,
    water_temperature=15.5,
    water_discharge=100.0
)
print(f"Water level: {observation.water_level} cm")
print(f"Water temperature: {observation.water_temperature}°C")

HydroObservationData

Represents a collection of hydrological observations for a specific station.

from meteo_lt import HydroObservationData

data = HydroObservationData(
    station=station,
    observations=[observation],
    observations_data_range={"from": "2024-07-01", "to": "2024-07-23"}
)
print(f"Station: {data.station.name}")
print(f"Observations: {len(data.observations)}")

Hydrological Data

The package provides access to hydrological data from Lithuanian water monitoring stations.

Fetching Hydrological Stations

To get the list of all hydrological stations:

async def fetch_hydro_stations():
    async with MeteoLtAPI() as api:
        stations = await api.fetch_hydro_stations()
        for station in stations:
            print(f"{station.name} ({station.code}) - Water body: {station.water_body}")

asyncio.run(fetch_hydro_stations())

Finding the Nearest Hydrological Station

You can find the nearest hydrological station using coordinates:

async def find_nearest_hydro_station():
    async with MeteoLtAPI() as api:
        # Example coordinates for Klaipėda, Lithuania
        nearest_station = await api.get_nearest_hydro_station(55.6872, 21.2797)
        print(f"Nearest station: {nearest_station.name}")
        print(f"Water body: {nearest_station.water_body}")
        print(f"Distance: approximately {nearest_station.latitude}, {nearest_station.longitude}")

asyncio.run(find_nearest_hydro_station())

Fetching Hydrological Observations

To get water level and temperature observations for a specific station:

async def fetch_hydro_observations():
    async with MeteoLtAPI() as api:
        # Get observations for a station
        hydro_data = await api.get_hydro_observation_data("klaipedos-juru-uosto-vms")

        print(f"Station: {hydro_data.station.name}")
        print(f"Water body: {hydro_data.station.water_body}")
        print(f"\nRecent observations:")

        for observation in hydro_data.observations[:5]:
            print(f"  {observation.observation_datetime}")
            print(f"    Water level: {observation.water_level} cm")
            print(f"    Water temperature: {observation.water_temperature}°C")
            if observation.water_discharge:
                print(f"    Water discharge: {observation.water_discharge} m³/s")

asyncio.run(fetch_hydro_observations())

Getting Observations for Nearest Station

Combine location finding with observation fetching:

async def get_nearest_station_observations():
    async with MeteoLtAPI() as api:
        # Find nearest hydro station to coordinates
        nearest_station = await api.get_nearest_hydro_station(55.6872, 21.2797)

        # Get observations for the nearest station
        hydro_data = await api.get_hydro_observation_data(nearest_station.code)

        print(f"Latest observations from {hydro_data.station.name}:")
        if hydro_data.observations:
            latest = hydro_data.observations[0]
            print(f"  Time: {latest.observation_datetime}")
            print(f"  Water level: {latest.water_level} cm")
            print(f"  Temperature: {latest.water_temperature}°C")

asyncio.run(get_nearest_station_observations())

Contributing

Contributions are welcome! For major changes please open an issue to discuss or submit a pull request with your changes. If you want to contribute you can use devcontainers in vscode for easiest setup follow instructions here.

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