National Weather Service United States Department of Commerce

Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. 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:
    • ​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)