Cloud all had ozone reach into the orange unhealthy for sensitive people level for the past two days (change the pulldown to the station and the pollutant to O3 on the MPCA Air Quality Index history) The ozone continues to spike upward to the orange (unhealthy for sensitive groups) the afternoon and evening, then decrease to the yellow (moderate) levels overnight (see current Minnesota Air Quality Index from MPCA). The tongue of air with high ozone concentrations accompanies the same southerly flow from Minnesota and Iowa sporadically into Arkansas, Texas, and Louisiana. The Minnesota Pollution Control Agency still has an air quality alert for high concentrations of ozone in central and eastern Minnesota through today. With High Ozone Central and Eastern MN and High Fire Danger North and West This air was initially the cooler and drier air that was in Manitoba and Saskatchewan a week ago and has come all the way around the high back to the western flank, so it has warmed some, but remained dry. Cloud had reaching 80 degrees in April and early May (see 30-day graph of St. Cloud observation chart from MesoWest) have climbed into the 80's for 3 straight days and for 6 of the past 8 days, a far cry from the trouble St. Afternoon temperatures (red line on the 5-day St. We have been on the western flank of that high since Friday (see 4 PM Sunday NWS WPC North America zoom-in map).The air has been quite dry, with dew points remaining in the 40's overnight and in the 30's during the day (see blue line on the 5-day St. Minnesota continues to gain the benefit from the slow-moving high pressure area parked over the Great Lakes (see clockwise circulation on the Mid-tropospheric water vapor loop from Colorado State satellite slider). Please review our full terms contained on our Terms of Service page.Monday, 4 :15 AM Bob Weisman Meteorology Professor Saint Cloud State University Atmospheric and Hydrologic Sciences Department Continued Warm This Week, But With Humidity, Storm Chances Arriving Tomorrow We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. We assume no responsibility for any decisions made on the basis of the content presented on this site. Weather data is prone to errors, outages, and other defects. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. See all nearby weather stations Disclaimer The details of the data sources used for this report can be found on the Minneapolis-St Paul International/Wold-Chamberlain Airport page.
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