The National Weather Service in Pittsburgh has released an Area Forecast Discussion at 6:41 AM EST, issuing a stark warning for potentially dangerous sub-freezing wind chills through Wednesday. According to the report, a "Cold Weather Advisory" and "Extreme Cold Warning" remain in effect across the region, prompting residents to brace for intense cold.
The National Weather Service highlighted that surface high pressure crossed the Upper Ohio Valley at night, with temperatures plummeting below zero and chills ranging from -10F to -20F. This has been exacerbated by the expected arrival of a shortwave, which may result in snow during the afternoon and evening commutes, complicating conditions further. Though the snow isn't predicted to surpass an inch in most areas, any amount could lead to reduced visibility and treacherous travel.
Moving into the short-term, the frigid arctic blast is set to continue, with extreme cold continuing overnight into Wednesday. The expected impact is severe, with warnings of freezing and bursting pipes, hypothermia, and frostbite risks being of particular concern. Authorities urge public vigilance, recommending that the welfare of vulnerable individuals and pets be a priority and suggesting the postponement of outdoor events.
The weather outlook shifts as temperatures are set to normalize by the weekend, with the potential for a precipitous return Sunday into Monday. While the extreme cold is forecasted to relent, aviation still faces challenges,. VFR conditions are anticipated to persist through Saturday vis-à-vis clear skies and calm winds. Notably, historical temperature records for January may be threatened as the current conditions vie to etch new benchmarks.
Climatologically speaking, the present cold snap represents a marked deviation from recorded norms. Pittsburgh has not experienced subzero daytime highs since 1994, and a sequence of days below 10F has not been seen since January 1997. Safety advisories remain prevalent as Pennsylvania and West Virginia brace for the continuous grip of this arctic chill.
