St Louis Weather Conditions & Forecast, January 12, 2018

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

ST LOUIS, MO/January 12, 2018 (STL.News) St Louis weather conditions & forecast readings from the St. Louis Lambert International Airport at 3:51 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


Temperature: 14°F – -10°C
Humidity: 73%
Wind Speed: NW 16 Gusting up to 25 mph
Barometer: 30.08 in (1019.6 MB)
Dew-point: 7°F – -14°C
Visibility: 9 Miles
Wind Chill: -2°F – -19°C
Heat Index: N/A°F – N/A°C

Extended Weather Forecast for the St Louis, Missouri area beginning January 12, 2018

Today: Cloudy, gradual clearing – high near 25, northwest wind 15 to 17 mph gusting as high as 28 mph.
Tonight: Increasingly cloudy – low around 13 with north wind 11 to 15 mph gusting as high as 23 mph.
Saturday: Partly sunny, with a high near 22. North wind 8 to 11 mph.
Saturday Night: Mostly clear – low around 7 with north wind 5 to 8 mph becoming calm.
Sunday: 20 percent chance of snow in pm, partly sunny – high near 27 with light southeast wind south 5 to 10 mph in the am.
Sunday Night: 30 percent chance of snow after midnight, mostly cloudy – low around 22.
M.L.King Day: Snow likely in the am, partly sunny – high near 24 with chance of precipitation – 60%.
Monday Night: Partly cloudy – low around 3.
Tuesday: Mostly sunny and cold – high near 14.
Tuesday Night: Mostly clear – low around 5.
Wednesday: Sunny – high near 22.
Wednesday Night: Mostly clear – low around 14.
Thursday: Mostly sunny – high near 33.

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

Delayed Air Quality Index: 01/11/18 11:00 PM CST

  • Good – 22 AQI – Ozone
  • Good – 8 AQI – Particle Pollution (2.5 microns)
  • Good – 5 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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