Cooler and Windy East of the Divide - Cold Front Wednesday Morning

The National Weather Service
Building a Weather-Ready Nation

...Cold Front to Usher in Much Cooler Temperatures and Gusty Wind on Wednesday...

An approaching weather system will drive a cold front south across northern and central Wyoming on Wednesday. The front is likely to push through the Big Horn Basin and Johnson County before sunrise and to a Riverton-to-Casper line by around 9:00 a.m.

Much cooler temperatures are anticipated in the wake of the cold front. Highs on Wednesday in the Big Horn Basin and Johnson County will be 20 to 25 degrees cooler than those seen on Tuesday. In addition, gusty northwest wind of 20 to 30 mph with gusts to near 40 mph will frequently occur on Wednesday. Wind speeds of 35 mph with gusts to around 50 mph could occur in northern Johnson County, including the city of Buffalo. High temperatures in the Bighorn and Absaroka mountains will generally be in the 50s. Readings will only climb to the 60s and lower 70s in the Cody Foothills, Big Horn Basin, and lower elevations of Johnson County.

Farther south in Fremont and Natrona counties, highs will top out in the 70s in the morning and then hold steady or even drop some in the afternoon.  Northeast winds will blow 15 to 25 mph with gusts to 35 mph across open and elevated locations.

Low temperatures Wednesday night will be in the upper 40s to lower 50s in the basins and valleys east of the divide. Mountain temperatures will be in the 30s and cold enough to produce light snow at elevations above about 9000 feet. Snow accumulations of a few inches are most likely to occur in the Bighorn Mountains. Conditions will be drier and less windy on Thursday. High temperatures Thursday will range from 65 to 75 with 50s in the mountains.

Those planning outdoor activities Wednesday and Thursday should prepare for much cooler temperatures and windy conditions. Hikers and campers in the mountains, especially the Bighorns, should prepare for wet conditions including light snow.

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