Winter Weather — Southern Grafton, New Hampshire

2022-02-19 · Southern Grafton, New Hampshire

Event narrative

Snow squalls crossed the Upper Valley between 400 pm and 500 pm. The Lebanon Municipal Airport observed a visibility of 1/4 mile and a wind gust of 27 knots at 402 pm.

Wider weather episode

On the 19th a low pressure north of the Great Lakes tracked through the St. Lawrence River Valley. Aloft a low amplitude shortwave trough went from positively to negatively tilted as it crossed the Northeast, helping to drive a cold front through the region. The temperatures at 850 hPa fell from -10 degrees Celsius to -16 degrees Celsius by the morning of the 20th. Along the leading edge of arctic air snow showers and snow squalls crossed northern New England in the afternoon and early evening.

Source: NOAA Storm Events Database, event_id 1009422. Narrative written by the NWS forecast office that issued the report.