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import argparse
import os
import szilagyi
from geopy.geocoders import Nominatim
from metpy import calc
from metpy.units import units
from windy import point_forecast
from windy import Windy
def main():
parser = argparse.ArgumentParser()
parser.add_argument("location")
args = parser.parse_args()
key = os.getenv("WINDY_KEY")
if not key:
raise RuntimeError("expected windy's api key")
locator = Nominatim(user_agent="waterspout-radar")
location = locator.geocode(args.location)
coords = (location.latitude, location.longitude)
registry = units
model = point_forecast.Model.ICONEU
levels = (point_forecast.Level.SURFACE, point_forecast.Level.H850, point_forecast.Level.H700, point_forecast.Level.H500)
windy = Windy(registry)
forecast = windy.point_forecast(key, *coords, model, ("temp", "dewpoint", "wind", "pressure"), levels)
for entry in forecast:
dt = abs(entry["temp-850h"] - entry["temp-surface"])
pressure, _ = calc.lcl(entry["pressure-surface"], entry["temp-surface"], entry["dewpoint-surface"])
lcl = calc.pressure_to_height_std(pressure)
pressure, _ = calc.el(
[entry["pressure-surface"].m_as(units.hPa), 850, 700, 500] * units.hPa,
[entry["temp-" + str(x)].m_as(units.degK) for x in levels] * units.degK,
[entry["dewpoint-" + str(x)].m_as(units.degK) for x in levels] * units.degK)
el = calc.pressure_to_height_std(pressure)
ccd = (el - lcl).to(units.ft)
try:
swi = szilagyi.calculate_swi(dt, ccd)
except ValueError:
swi = -10
print(entry.timestamp, dt, ccd, swi)
if __name__ == '__main__':
main()
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