St Louis Weather Conditions & Forecast, December 29, 2017

St Louis Weather Conditions & Forecast, December 29, 2017

St Louis Weather Conditions, Forecast & Air Quality Index readings published by STL.News

ST LOUIS, MO/December 29, 2017 (STL.News) St Louis weather conditions & forecast readings from the St. Louis Lambert International Airport at 2:51 a.m at Latitude: 38.75°N, Longitude: 90.37°W – Elevation 604 feet.  Forecast is provided by the National Weather Service (N.W.S.).

Current Conditions

WEATHER WARNING: Hazardous Weather Outlook – N/A

Temperature: 19°F – -7°C
Humidity: 68%
Wind Speed: S 3 mph
Barometer: 30.44 in (1032.6 MB)
Dew-point: 10°F – -12°C
Visibility: 10 Miles
Wind Chill: N/A°F – N/A°C
Heat Index: N/A°F – N/A°C

Extended Weather Forecast for the St Louis, Missouri area beginning December 29, 2017

Overnight: Cloudy – low around 16 with light west wind.
Friday: Cloudy – high near 30 with calm wind southeast 5 to 8 mph in the pm.
Friday Night: Chance of freezing drizzle between early am, mostly cloudy – low around 16 with east wind 5 to 13 mph.
Saturday: Mostly cloudy/cold, temperature falling to around 10 by 5 pm with north wind 11 to 14 mph.
Saturday Night: Mostly cloudy – low around 2 with north wind 7 to 11 mph.
Sunday: Partly sunny/cold – high near 11.
Sunday Night: Partly cloudy – low around -1.
New Year’s Day: Sunny/cold – high near 8.
Monday Night: Mostly clear – low around 0.
Tuesday: Sunny and cold – high near 17.
Tuesday Night: Partly cloudy – low around 10.
Wednesday: Partly sunny/cold – high near 17.
Wednesday Night: Partly cloudy – low around 3.
Thursday: Mostly sunny/cold – high near 12.

Air Quality Index for Saint Louis, Missouri – (A.Q.I.)

Delayed Air Quality Index: 12/28/17 2:00 PM CST

  • Moderate – 52 AQI – Particle Pollution (2.5 microns)
  • Good – 18 AQI – Ozone
  • Good – 8 AQI – Particle Pollution (10 microns)

Agency: St. Louis Metropolitan Area (American Lung Association)

Air Quality Index (A.Q.I.)

Good – Air quality in considered “satisfactory” and air pollution poses little to no threat.

Moderate – Air quality is considered “acceptable.” However, some pollutants there may be a moderate health concern for a very small number of people who are sensitive to air pollution.

USG – while the general public will not likely be affected by this AQI range, people with lung disease, older adults and children are a great risk from exposure to ozone, whereas, persons with heart and lung disease, old adults and children are at greater risk from the presence of particles in the air.

Unhealthy – Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.

Very Unhealthy – Health Alert: everyone may experience more serious health effects.


Source: Current Weather Conditions and Forecast are obtained from the National Weather Service @ Forecast.Weather.Gov – Air Quality Index (AQI) readings are obtained from AirNow.Gov – (MS)


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