Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

If you would like to report severe weather, the best way to contact us is by calling toll free at 1-800-446-1428. Skywarn™ Spotters and the general public can also provide us reports in other ways. Skywarn™ Spotters are an important asset to the NWS. If are interested in becoming a Skywarn™ Spotter then check out this link.

Other ways to report severe weather:

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Your severe weather reports reach forecasters in real time and, after quality control, may be included in a Local Storm Report (LSR) product.

If you experience any of the following,

Please Report It!

Thunderstorm Criteria:

Hail (Be specific with regard to size)
- Report any size and specify diameter.
- Quarter-sized (1") and larger is severe!
- Hail Sizes Chart
Wind Gusts
- 58 mph or greater; specify whether estimated or recorded
- large branches downed (specify diameter of branch)
- Trees/power lines downed
- Structural damage to buildings (roof, windows, etc.)
Rainfall
- 1 inch or greater in an hour and every inch thereafter
- 2 inches or greater storm total
Flooding
- Report any flooding
- Streams/Rivers -- also, when nearing bankfull
- Street (depth of water)
Low visibility due to:
- Blowing dust or sand.
- Fog
Tornadoes or funnel clouds (be very wary of look-alikes; watch for rotation)
- Rotating appendage from a cumulonimbus cloud not touching the ground

Winter Criteria:

Heavy Snowfall
- When snow rates of 1" per hour are occurring.
- Then accumulations at 4 inches, 6 inches, and every 3 inches thereafter (eg. 2,4,6,9,12,etc)
- Give a final report/total at the end of the storm
- Thunder Snow - time and location
Ice
- Any occurrence, or accumulation, of freezing rain
- Accumulation of 1/4" or more
High Winds:
- â€‹Report gusts over 50 mph.
- Damage of any kind including trees and branches broken or blown down and downed power poles causing power outages.
Low visibility due to:
- Blowing dust
- Blowing snow.
Flooding
- Report any flooding
General Winter Reports
- When forecast differs significantly from observed (i.e. snowing with no snow in forecast, sleet...when only snow is forecast...)
- Any other significant weather occurrence(i.e. damage from strong winds not associated with a thunderstorm)

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Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

Storm Report

Thunderstorm Criteria:

Winter Criteria: