January 28-30, 2013 Snow, Sleet, Rain, Wind
A widespread system affected the region between January 28 and 31, 2013. After a strong cold air mass settled overhead for the January 22-27 time frame, a brief pattern reload occurred with light to moderate snow, sleet and freezing rain on the 28th, followed by unseasonable warmth on the 29-30th and a strong cold front producing heavy rain and strong wind gusts on the 30-31st, with rainfall between 1-3 inches and wind gusts up to 60-75 mph.
January 30, 2013 Storm Archive
January 26 – Wintry Mix Monday, Then Warm
January 27 – Snow/Ice Tomorrow, Then T-Storms/Wind
January 28 – Storm Updates
January 30 – Heavy Rain, Wind, Thunder Tonight
January 30 – Storm Updates
The region was affected by two waves; the first was on Monday, 1/28, with a wave of low pressure moving east through New York state and southeast into Massachusetts, removing the cold air mass from the region and producing light snow in the interior Northeast region and a wintry mix further south, where low level cold air held in place initially. Once this wave of low pressure moved out of the region, a broad low pressure developed and intensified over the central US on Tuesday into Wednesday, January 29-30, bringing a strong warm air mass into the northeast US while another strong cold surge dived southeast behind the developing storm. The low pressure then rapidly intensified late on the 30th into the 31st as it quickly tracked northeast through Michigan and southeast Canada just north of the US/Canada border, deepening from about 984 mb to 960 mb in 18 hours, while bringing a strong cold front through the northeast US region with strong winds, heavy rain and some thunder.
Forecasting The Storm
This section will be added soon.
Storm Impact in the Northeast
Regional radar image from 10:18 AM 1/28, from the National Weather Service. Widespread light to moderate precipitation in the form of snow fell over NY state, with light snow/sleet in the NYC area and sleet/freezing rain in Pennsylvania.
The first part of the system affected the region on Monday, January 28. As a wave of low pressure tracked through the interior Northeast before sliding southeast towards Cape Cod, light precipitation spread into the region on Monday morning. With enough cold air in the front end of the precipitation shield, snow was initially observed especially from NYC and north/west between 9-11 AM, with a changeover to sleet occurring around 11 AM-1 PM while Pennsylvania observed light freezing rain, and light snow spread through the interior Northeast with light to moderate accumulations. Long Island and Connecticut also started with a period of light snow in the late morning before changing over to sleet and rain by the early-mid afternoon, with most of the area drying up from west to east during the mid to late afternoon hours.
Regional radar image from 11:58 PM 1/30, from the National Weather Service. Widespread heavy rain covered PA and NY states before shifting east into the area.
The second round of the storm affected the region during Wednesday into early Thursday, January 30-31. Rain initially began over Pennsylvania and New York states during Wednesday afternoon and evening, mostly staying west of the area. The rain gradually began extending eastward, with northwest NJ and SE NY beginning to see rain between 10 PM and 12 AM. Rain affected the rest of the area between 1-6 AM, with a narrow line of heavy rain and strong winds moving through western NJ around 3 AM and NYC around 4 AM, producing up to 1/2 inch in just 1 hour, along with wind gusts in the 45-60 mph range. The storm then gradually ended by the early morning hours, with temperatures steadily falling throughout the day on Thursday.