Author: Ben Castellani (Page 205 of 358)

Ben grew up in southwestern Pennsylvania and holds both a bachelor's and a master's degree in Meteorology, the latter being from CU Boulder. His hometown received nearly three feet of snow from the Storm of the Century back in March of 1993, sparking his initial interest in impactful weather. Ben currently works on remote sensing and data analysis software at NV5 Geospatial Software in Boulder.

The Tuesday morning “Brown Cloud”

November 5, 2019 / Ben Castellani

DayCAST: Tue 11/05/19

November 5, 2019 / Ben Castellani

Mild Tuesday, but a brush of winter tomorrow night Cool and dry northwest flow continues across the area once again. With yesterday's slightly cooler airmass pushing eastward, this will open the door for more seasonal temperatures today. We'll refrain from calling it "warm" since the expected high temperature near 60 degrees is just about normal for early November in Boulder. Embedded …

Where did this week’s Arctic airmass come from? Why the Arctic, of course!

November 1, 2019 / Ben Castellani

Using a technique called reverse trajectory analysis, we step back in time to see where the bitter cold air this week originated from. We also explain why we believe the odds of another Arctic intrusion into the United States are elevated during the coming week.

DayCAST: Thu 10/31/19

October 31, 2019 / Ben Castellani

A placid end to October! Following the active weather pattern of late, it's nice to transition back to quieter conditions for a time. After a shift to stronger downslope winds last night, warmer air aloft will mix down to the surface today from the northwest and lead to a 20-degree jump in temperatures compared to yesterday. The Arctic airmass was …

DayCAST: Wed 10/30/19

October 30, 2019 / Ben Castellani

45 degrees below normal, but turning sunny The last of the October snow is now over and done with but the lingering Arctic airmass will leave temperatures bitterly cold across the Front Range for one more day. The core of the now open-wave low pressure is passing through southern Colorado this morning. Extremely cold air continues to advect in from the north …

Premium Storm Update Tue 10/29/19 7:00 AM

October 29, 2019 / Ben Castellani

The upper-low continues its round-about approach to Colorado this morning and is currently located across southeast Idaho. The system is just now beginning to cut-off and develop a closed-low. In the GOES-East infrared animation this morning we can observe that the predicted position of the low pressure by the GFS model matches up well with observations: a nice spin across …

DayCAST: Mon 10/28/19

October 28, 2019 / Ben Castellani

Snowstorm #1 winding down this morning Temperatures have dropped into the teens while light snow continues to fall across the region this morning, as it has done so for nearly 24 hours straight in many locations. The best forcing from the jet passed overhead during the evening and overnight hours spawning numerous heavier snow bands. One such band developed over downtown …