National Weather Service United States Department of Commerce

Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

 
aviation title
Aviation Advisories
Before departure, call 1-800-WX-BRIEF for latest weather and file flight plans.
Advisories Observations Forecasts Aviation Info
AWC - Icing/Turbulence/Freezing Level and Volcanic Ash
Icing | Turbulence | Freezing Level | Volcanic Ash
Center Weather Service Units
Seattle | Oakland | Los Angeles | Salt Lake | Albuquerque | Denver
CWSU Advisories
Seattle | Oakland | Los Angeles | Salt Lake | Albuquerque | Denver
Airmets/Sigmets and Convective Sigmets
Convective-SIGMETS
GRAPHICAL-AIRMETS
AIRMET & SIGMET WEBPAGE
TEXT Products Zulu (Icing) Sierra (IFR and Mountain Obscuration) Tango (Turbulence)