The National Weather Service has issued a High Wind Waring for the Laramie Valley effective from 11 a.m. until 11 p.m. Sunday.

Travel between Laramie and Rawlins is already being impacted by a strong weather system moving into the area with strong winds, snowfall and blowing snow on roads in that area. The forecast is calling for high winds through Tuesday and perhaps into Wednesday.

Here's the alert from the NWS:

... HIGH WIND WARNING IN EFFECT FROM 11 AM THIS MORNING TO 11 PM MST THIS EVENING... THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A HIGH WIND WARNING... WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 11 PM MST THIS EVENING. THE HIGH WIND WATCH IS NO LONGER IN EFFECT. * TIMING... THIS AFTERNOON THROUGH THE EVENING. * WINDS... WEST 30 TO 40 MPH WITH GUSTS TO 60 MPH. * IMPACTS... MAINLY TO TRANSPORTATION. LIGHTWEIGHT AND HIGH PROFILE VEHICLES SHOULD USE CAUTION ALONG INTERSTATES 80 AND 25. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

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... HIGH WIND WARNING FOR AREAS NEAR THE SOUTHERN LARAMIE RANGE FROM THIS AFTERNOON THROUGH MONDAY... .A STRONG PRESSURE GRADIENT WILL DEVELOP THIS AFTERNOON ACROSS SOUTHEAST WYOMING. VERY STRONG WINDS ARE LIKELY TO DEVELOP FROM THE SOUTHERN LARAMIE RANGE EASTWARD TOWARD CHEYENNE.