File photo of flooding along the Big Wind River in 2010.

(Riverton, Wyo.) – The Fremont  County Emergency Management Agency said Friday morning that the first extended period of warm weather is now upon us in the Wind River Basin.

“Over the coming week we will see temperatures routinely above normal. Mountain snowpack will begin to melt and area creeks and streams will be on the rise. Foothill locations will obviously be more susceptible to flooding. Unfortunately, flooding in those locations frequently comes at night,” a statement said.

Thursday night’s rain across the basin would also add to the runoff.

“Initially, we will see more substantial rises Friday night into Saturday morning and perhaps more significantly Saturday night into Sunday morning. Attention should be given to the Big Wind River including the Dubois area down to Riverton. All creeks and rivers will raise some due to conditions. If you need sandbags, please contact Fremont County Emergency Management Agency at 307- 856-2374.”

The weekend weather outlook is as follows:

Saturday…. Thunderstorms possible which may be able to produce strong gusty winds, small hail and occasional heavy downpours in the mountains over ripe snow pack keeping flood concerns elevated.

Sunday… A slight chance of thunderstorms east of the continental divide, especially over Sweetwater and Natrona Counties.

Monday through Wednesday… Warmer. Isolated thunderstorms each afternoon and evening. Breezy to windy Tuesday and Wednesday, with increased fire danger for the lower elevations of the southwest and central areas.

If threatening weather approaches your area take shelter. Be aware of your surroundings and weather conditions.

–Fremont County Emergency Management