Colder air then returns to the region for the weekend, with highs in the teens and lows dropping below zero ... again. However, this air mass should not be as extreme as the last one.
Both the ECMWF and GFS have been showing a strong piece of energy moving into the southwest CONUS as PNA ridging shifts west. Mid and upper level confluence will force strong surface high pressure in southern Canada (00z GFS shows 1040mb pressures in Quebec D6 and D7). The GFS depicts a stretch of overrunning snow, Monday and Tuesday, across the Ohio Valley and Northeast, before the main energy ejects out of the southwest, and develops into a strong coastal low (as depicted also by the Euro) by Wednesday 1/28.
So, we have a boring stretch ahead, but plenty to keep an eye on in the medium range.
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