Event: Flood Watch

Message Type: Update

Urgency: Future

Severity: Severe

Certainty: Possible

Wheather Alert Summary: Runoff from a combination of heavy rain and some mid elevation snow melt may cause flooding of streams and low lying areas in and downstream of the foothills. moderate to heavy rainfall over recent burn areas (robertson draw and american fork) may produce flash flooding in and downstream of the burned area. * what...Flooding caused by rain and snowmelt remains a threat. * where...Portions of south central montana, including the following areas, bighorn canyon, pryor/northern bighorn mountains and southern big horn and north central wyoming, including the following areas, northeast bighorn mountains and sheridan foothills. * when...From this evening through monday evening. * impacts...Excessive runoff may result in flooding of streams and other low-lying and flood-prone locations close to the foothills. some roads may become impassable. now is the time to move equipment and livestock to higher ground away from waterways. recent burn scars may be more susceptible to produce flash flooding, including the elk burn scar west of dayton and sheridan. * additional details... - scattered showers and thunderstorms this evening will turn to more persistent rain into the overnight hours. snow levels will fall from 9500 feet this evening to around 5000 feet monday morning. rain falling on snow may melt 1 to 3 inches of snow water before cooler temperatures change precipitation to snow in the foothills, ending the snowmelt. the combination of precipitation and snowmelt may result in a 2 to 4 inch water event with rapid runoff filling small streams and creeks along the foothills. - http://www.Weather.Gov/safety/flood

Event: Winter Storm Warning

Message Type: Alert

Urgency: Expected

Severity: Severe

Certainty: Likely

Wheather Alert Summary: * what...Heavy snow expected. total snow accumulations of 12-20 inches. winds could gust as high as 45 mph. * where...In montana, pryor/northern bighorn mountains. in wyoming, northeast bighorn mountains. * when...From 9 pm this evening to midnight mdt monday night. * impacts...Travel may be hazardous on us-14. recreation in the high country could be impacted by heavy accumulating snow. expect blowing snow to cause reduced visibility.

Event: Dense Fog Advisory

Message Type: Update

Urgency: Expected

Severity: Moderate

Certainty: Likely

Wheather Alert Summary: * what...Visibility one-quarter of a mile or less in dense fog. * where...Central laramie county, east platte county, and south laramie range foothills. * when...Until 9 am mdt this morning. * impacts...Low visibility could make driving conditions hazardous.

Event: Dense Fog Advisory

Message Type: Alert

Urgency: Expected

Severity: Moderate

Certainty: Likely

Wheather Alert Summary: * what...Visibility less than one-quarter of a mile in dense fog. * where...Bordeaux area along interstate 25 between chugwater and wheatland, and east laramie county. * when...Until 9 am mdt this morning. * impacts...Low visibility could make driving conditions hazardous.

Event: Winter Weather Advisory

Message Type: Alert

Urgency: Expected

Severity: Moderate

Certainty: Likely

Wheather Alert Summary: * what...Snow expected. total snow accumulations between 4 and 8 inches, with the highest amounts near the montana border. winds gusting as high as 35 mph. * where...Absaroka mountains. * when...From 6 am to 6 pm mdt monday. * impacts...Travel could be difficult.

Event: Winter Weather Advisory

Message Type: Alert

Urgency: Expected

Severity: Moderate

Certainty: Likely

Wheather Alert Summary: * what...Snow expected. total snow accumulations of 6 to 12 inches north of powder river pass; 4 to 8 inches south of powder river pass. winds gusting as high as 45 mph. * where...Bighorn mountains southeast and bighorn mountains west. * when...From 6 am to 6 pm mdt monday. * impacts...Travel could be difficult, including over powder river and granite passes.

Event: Special Weather Statement

Message Type: Alert

Urgency: Expected

Severity: Moderate

Certainty: Observed

Wheather Alert Summary: Watch for areas of dense fog overnight, with visibilities at or below one-quarter of a mile. if you are driving and encounter the dense fog, please slow down, use your low beam headlights and allow for some extra travel time to safely reach your destination.

Event: Hydrologic Outlook

Message Type: Alert

Urgency: Future

Severity: Unknown

Certainty: Possible

Wheather Alert Summary: Esfbyz the latest snow data from the nrcs and nohrsc shows a significant snowpack existing between 5500 and 7500 feet. in this elevation 3 to 7 inches of water is contained within the snowpack. a storm system is expected to impact the area from sunday afternoon through monday. from sunday afternoon into early monday morning temperatures will be warm enough for rain to fall in this mid elevation layer over the beartooth, absaroka and crazy mountains and foothills. the pryor and bighorn mountains and foothills will see rain potential from late sunday evening into early afternoon monday. a few thunderstorms may bring locally heavy rainfall sunday afternoon into sunday evening. snowmelt models are estimating half of this mid elevation snowpack could melt out during the rainfall period. with 1 to 2 inches of rain in the forecast, this means an additional 1.5 to 3.5 inches of water contribution from snowmelt. total water event could be 2.5 to 5.5 inches if these forecasts are correct. anywhere snowpack is present, the ground underneath is likely frozen resulting in quick runoff until reaching unfrozen ground at lower elevations. burn scar areas will also see rapid runoff due to burnt soil conditions, including the robertson draw, american fork, and elk burn areas. smaller creeks and streams will see the highest potential for flooding with this event. forecasts for the larger rivers in our area show up to 3 times the current flows by tuesday, though water levels remain well below flood stage. water may flow overland and across roadways creating difficult to dangerous foothills travel. low lying areas may fill with water creating additional property flooding. the severity of the impacts will depend on how quickly and how much the snowpack melts, in addition to the amount of rain that falls on top of the snowpack. while flooding is not imminent, now is the time to move equipment and livestock out of low lying areas, and away from waterways. if you are downstream from a burn scar, have an evacuation plan ready should conditions become dangerous. do not drive over flooded roadways as the roadbed may be washed out. be especially careful driving at night when water covered roadways are less visible. this period is not a good time to recreate in the foothills, but anyone that is recreating in these areas should expect changing conditions and use extreme caution near waterways. do not camp in low lying areas adjacent to streams. there is still uncertainty with this storm system. stay tuned to the forecast through the weekend for the latest trends, along with any watches, warnings or advisories that may be issued. please report any flooding to local law enforcement and have them relay the report to the national weather service.

Event: Hydrologic Outlook

Message Type: Alert

Urgency: Future

Severity: Unknown

Certainty: Possible

Wheather Alert Summary: Esfbyz the latest snow data from the nrcs and nohrsc shows a significant snowpack existing between 5500 and 7500 feet. in this elevation 3 to 7 inches of water is contained within the snowpack. a storm system is expected to impact the area from sunday afternoon through monday. from sunday afternoon into early monday morning temperatures will be warm enough for rain to fall in this mid elevation layer over the beartooth, absaroka and crazy mountains and foothills. the pryor and bighorn mountains and foothills will see rain potential from late sunday evening into early afternoon monday. a few thunderstorms may bring locally heavy rainfall sunday afternoon into sunday evening. snowmelt models are estimating half of this mid elevation snowpack could melt out during the rainfall period. with 1 to 2 inches of rain in the forecast, this means an additional 1.5 to 3.5 inches of water contribution from snowmelt. total water event could be 2.5 to 5.5 inches if these forecasts are correct. anywhere snowpack is present, the ground underneath is likely frozen resulting in quick runoff until reaching unfrozen ground at lower elevations. burn scar areas will also see rapid runoff due to burnt soil conditions, including the robertson draw, american fork, and elk burn areas. smaller creeks and streams will see the highest potential for flooding with this event. forecasts for the larger rivers in our area show up to 3 times the current flows by tuesday, though water levels remain well below flood stage. water may flow overland and across roadways creating difficult to dangerous foothills travel. low lying areas may fill with water creating additional property flooding. the severity of the impacts will depend on how quickly and how much the snowpack melts, in addition to the amount of rain that falls on top of the snowpack. while flooding is not imminent, now is the time to move equipment and livestock out of low lying areas, and away from waterways. if you are downstream from a burn scar, have an evacuation plan ready should conditions become dangerous. do not drive over flooded roadways as the roadbed may be washed out. be especially careful driving at night when water covered roadways are less visible. this period is not a good time to recreate in the foothills, but anyone that is recreating in these areas should expect changing conditions and use extreme caution near waterways. do not camp in low lying areas adjacent to streams. there is still uncertainty with this storm system. stay tuned to the forecast through the weekend for the latest trends, along with any watches, warnings or advisories that may be issued. please report any flooding to local law enforcement and have them relay the report to the national weather service.