National Weather Service United States Department of Commerce

Quiet Weather Pattern for U.S. Today; Cold Front to Move into Pacific Northwest Tonight

Expansive Canadian-sourced high pressure will provide mainly fair weather across the U.S. on Monday. Temperatures over the eastern states will run below normal while the western states see above normal temperatures. On Monday night, a cold front will move onshore in the Pacific Northwest, bringing low elevation rain and heavy mountain snow; unsettled weather will continue through the week. Read More >

 

 
Icing - AIRMET ZULU (12-hour period)
  • Moderate Icing
Turbulence - AIRMET TANGO (12-hour period)
  • Moderate Turbulence HIGH level (>FL180)
  • Moderate Turbulence LOW level (sfc-FL180)
  • Low Level Wind Shear (LLWS) below 2000 feet AGL
  • Sustained surface winds of 30 knots or more at the surface
Instrument Flight Rules (IFR) or Mountain Obscuration - AIRMET SIERRA (12-hour period)
  • Ceilings less than 1000 feet and/or visibility less than 3 miles affecting over 50% of the area at one time.
  • Extensive mountain obscuration
Icing - FREEZING LEVEL (12-hour period)
  • Lowest Freezing Levels
  • Multiple Freezing Levels

 

Please note that SIGMETs are not included in the graphics below.

 

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