National Weather Service United States Department of Commerce

Weather Focus Shifts To The West This Weekend

A strong system and cold front will dive and carve through the West this weekend. Widespread mountain snow is expected for the favored terrain, as some winter storm watches have been issued. This system will then evolve into a multi-hazard storm of heavy rain, flooding and severe thunderstorms early to the middle of next week, from the Lower Mississippi Valley through the saturated Mid South. Read More >

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Radar Legend Lightning Legend Flight Category:
VFR  MVFR
IFR  LIFR
Weather Shading:
Convective   Freezing
Winter   Smoke/Ash
Liquid   Fog/Haze


The above loop uses radar and visible/IR satellite data obtained from Aviation Weather Center (AWC), lightning (GLM) data from NOAA nowCOAST, and observations (for flight category and weather) from MesoWest. The radar, lightning, visible satellite, IR satellite, and flight categories/weather can be toggled on/off. When both the flight category and weather are displayed, the flight category icon will be on the inside and the partially-transparent weather color on the outside. Clicking on the map will start/stop the loop. Left-clicking on the "Speed" area will slow the loop and right-clicking will accelerate the loop, ranging from 0.05 to 5 second interval. Additional URL parameters include lt (center latitude), ln (center longitude), zm (zoom level, 0-12), nolabel (removes flight category icon ID labels), wide (thicken US state boundaries), and start (UTC start date/time, YYYYMMDDhhmm format, AWC data goes back up to 2 days, GLM data up to 5 hours). The URL should auto-update with the current settings, allowing for an easy bookmark/favorite.