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*Premium* Weather Quiz: What causes the annual cycle in atmospheric CO2 concentrations?

BACKGROUND: About ten years ago, I interned as a meteorologist for the SoyFACE project at the University of Illinois (which is still ongoing today!). The goal of SoyFACE is to discover the effects of atmospheric change on Midwestern crops and find solutions that will lead to the crops being better adapted in the future. This included growing acres of soybeans from seed to harvest while …

DayCAST: Tue 03/26/19

Today is the beginning of a VERY warm stretch across most of Colorado. As the ridge axis shifts eastward, flow through a large depth of the atmosphere will turn south and southwesterly this afternoon through Thursday. You can see the surge of warm air in the GFS 800 mb temperature forecast below on the left. Temperatures this afternoon will climb …

DayCAST: Sun 03/24/19

Today's weather will be dominated by weak lift aloft from both a shortwave low pressure system, as well as the upper-level jet stream. Below shows the 250 mb wind pattern. A trough axis is present across western Colorado, with a jet stream stretching from central Arizona into northern Texas. While not a big player today, the exit region of the …

DayCAST: Sat 03/23/19

As of this morning, the low pressure system is centered over the Colorado and western Nebraska borders, as indicated below in this morning's visible satellite image. Much of the current cloud cover over the Denver Metro is high-level cirrus and cirrostratus. The storm system will make its way northeast into Nebraska later today and this evening, eventually giving way to …

DayCAST: Fri 03/22/19

Storm system taking aim on the region later this afternoon and through tonight. The mid-level flow is shown below. By this evening, a strong low pressure system will have moved from New Mexico into the southeast part of our state by 6 PM. The track of this system will be very similar to the bomb cyclone winter storm we experienced …

DayCAST: Thu 03/21/19

Warm with increasing clouds today The first full-day of spring will be a stellar one! The storm system we have been tracking all week is making progress towards Colorado and will be a player for us tomorrow. The center is located in Nevada today, with warm/moist southerly flow pushing northward into our region. This should make for temperatures a few degrees …

DayCAST: Wed 03/20/19

Happy Vernal Equinox We have endured a very long, cold, and at times, snowy winter thus far. But alas, spring is finally upon us....Hooray! Despite the name literally coming from a Latin term that translates to "equality of night", we do not experience equal amounts of day and night on the Equinox. That actually happened a few days ago. TimeandDate.com …

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