Coastal Storm Along the East Coast; Pacific Storm System in the West on Friday

A strengthening coastal storm will bring soaking rains to portions of the Mid-Atlantic and Northeast, with accumulating snow likely across the higher elevations of northern New England through Friday. A Pacific storm system will bring heavy low elevation rain, and gusty winds to northern California and the Pacific Northwest, as well as possible blizzard conditions to the Sierra Nevada on Friday. Read More >

Background

The lightning images below are updated daily around 7:30 to 8:30 AM and contain 24-hr accumulations of lightning ending at 6 am MDT (5 am MST) each day. There are two sets of images for (1) NLDN cloud-to-ground flashes only and (2) GOES-East Lightning Mapper (GLM) cloud flash points. Option #1 only represents cloud-to-ground lightning flashes, and is based on a surface detection network. Option #2 does not discriminate between cloud-to-ground versus in-cloud flashes (i.e., it represents the total lightning) and is based on satellite. In-cloud lightning flashes can comprise 60–90% of the total lightning (i.e., most lightning does not reach the ground). Satellite-based lightning detection also does not depict the exact location where the flash occurred because of an issue known as "parallax." Mouse over each day to view the 24-h cumulative lightning flash maps. Printable versions are at the bottom of each of the three map segments.

National Lightning Detection Network (NLDN) Cloud-to-Ground Lightning Flashes

24-h Cumulative NLDN Cloud-to-Ground Lightning Flashes	Yesterday	2 Days Ago	3 Days Ago	4 Days Ago	5 Days Ago	6 Days Ago	7 Days Ago	8 Days Ago

Printable: Yesterday, 2 Day Ago, 3 Days Ago, 4 Days Ago, 5 Days Ago, 6 Days Ago, 7 Days Ago, 8 Days Ago

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Coastal Storm Along the East Coast; Pacific Storm System in the West on Friday

Lightning Archive

NWS Grand Junction Colorado Lightning Maps

Background

National Lightning Detection Network (NLDN) Cloud-to-Ground Lightning Flashes