Talk about murk.
— NWS Twin Cities (@NWSTwinCities) December 12, 2018
Dense fog and air quality advisories blanket southern Minnesota into Thursday. Let’s start with the expanded air quality alert for southern Minnesota.
The current Air Quality Alert from @mpca_aqi **has been expanded** across central/southern Minnesota including the Twin Cities metro, Rochester, Mankato, Willmar, and Tribal Nations of Upper Sioux and Prairie Island. Valid through 6 pm Thursday, Dec 13. https://t.co/DHMIq9xFzN pic.twitter.com/MouwSHyaSr
— MPCA (@MnPCA) December 12, 2018
Air quality readings have spiked in southeast Minnesota and now reach into the orange (unhealthy for sensitive groups) category.
The dense fog advisory covers most of southwest Minnesota.
Including the cities of Morris, Glenwood, Madison, Benson,
Montevideo, Willmar, Granite Falls, Olivia, Redwood Falls,
New Ulm, St Peter, St James, Mankato, and Fairmont
308 PM CST Wed Dec 12 2018
…DENSE FOG ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 8 AM
The National Weather Service in Twin Cities/Chanhassen has issued
a Dense Fog Advisory, which is in effect from 8 PM this evening
to 8 AM CST Thursday.
* VISIBILITY…Widespread visibilities of a quarter mile or less
are expected to develop this evening and last through the night.
* IMPACTS…Limited visibilities will make travel difficult. With
temperatures below freezing, freezing fog could lead to slick
spots on area roadways.
Milder by Friday
We need a good breeze to mix out the fog and particulate matter. That arrives by Thursday night. Friday and Saturday look sunnier and milder.
I still think much of southern Minnesota and the Twin Cities have a good shot at 40 degrees Friday and Saturday afternoons. The mild air lingers into next week.
Mild into Christmas Eve?
Right now the medium-range guidance products favor milder than average weather into Christmas Eve. The National Oceanic and Atmospheric Administration’s Climate Prediction Center favors milder-than-average temperatures overall across the northern United States into the first days of 2019.