Londonderry News

From the National Weather Service

Feb 18 4am update

Winter weather advisory in effect from 7 pm this evening to 1 pm est Thursday.  3 to 6 inches for that segment of the storm.

Feb 17th from the NWS

A significant winter storm looms for western Maine and northern central and southeast New Hampshire including Londonderry Wednesday night into Thursday night.

Low pressure over the great lakes Wednesday afternoon will move east as a secondary low pressure system develops over central England late Wednesday night and Thursday morning. The secondary low will move slowly north across northern new England into late Thursday night. The combination of systems may bring a significant winter storm to the region beginning Wednesday evening and lasting into Thursday night.

Look for the snow to develop from west to east during Wednesday evening. the snow may fall heavily at times late Wednesday evening into early Thursday morning across much of the area. As milder air tries to come onshore near the coast the snow may mix with or even change to rain toward daybreak Thursday.

The heaviest snow will end Thursday morning in Londonderry and across southern New Hampshire and southwest Maine but continue across the rest of the area into Thursday afternoon. Near the coast milder air from the ocean may cause the snow to change to rain especially south and east of route 95.

The precipitation may become lighter for a time Thursday afternoon and Thursday evening. However as an upper level low approaches more snow can be expected especially across the mountains. At this time there is the potential for more than 6 inches of storm total snowfall for the entire region with significantly more possible across central New Hampshire and interior sections of western and central Maine. If you have travel plans during this period be sure to keep abreast of the latest forecasts and make alternate plans should winter storm warning be issued.

• Winter storm watch in effect from Wednesday evening through late Thursday night.

A winter storm watch means there is a potential for significant snow sleet or ice accumulations that may impact travel. Continue to monitor Londonderry Hometown Online News and other media outlets for the latest forecasts.