There are currently 9 Weather Alerts in Wyomingselect a different state
Flood Watch issued April 27 at 3:46AM MDT until April 29 at 12:00AM MDT by NWS Billings MT
Event: Flood Watch
Message Type: Update
Urgency: Future
Severity: Severe
Certainty: Possible
Affected Area: Southern Big Horn; Bighorn Canyon; Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains; Sheridan Foothills
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
Winter Storm Warning issued April 27 at 3:22AM MDT until April 29 at 12:00AM MDT by NWS Billings MT
Event: Winter Storm Warning
Message Type: Alert
Urgency: Expected
Severity: Severe
Certainty: Likely
Affected Area: Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains
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.
Dense Fog Advisory issued April 27 at 3:16AM MDT until April 27 at 9:00AM MDT by NWS Cheyenne WY
Event: Dense Fog Advisory
Message Type: Update
Urgency: Expected
Severity: Moderate
Certainty: Likely
Affected Area: East Platte County; South Laramie Range Foothills; Central Laramie County
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.
Dense Fog Advisory issued April 27 at 3:16AM MDT until April 27 at 9:00AM MDT by NWS Cheyenne WY
Event: Dense Fog Advisory
Message Type: Alert
Urgency: Expected
Severity: Moderate
Certainty: Likely
Affected Area: Central Laramie Range and Southwest Platte County; East Laramie County
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.
Winter Weather Advisory issued April 27 at 1:23AM MDT until April 28 at 6:00PM MDT by NWS Riverton WY
Event: Winter Weather Advisory
Message Type: Alert
Urgency: Expected
Severity: Moderate
Certainty: Likely
Affected Area: Absaroka Mountains
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.
Winter Weather Advisory issued April 27 at 1:23AM MDT until April 28 at 6:00PM MDT by NWS Riverton WY
Event: Winter Weather Advisory
Message Type: Alert
Urgency: Expected
Severity: Moderate
Certainty: Likely
Affected Area: Bighorn Mountains West; Bighorn Mountains Southeast
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.
Special Weather Statement issued April 26 at 11:28PM MDT by NWS Cheyenne WY
Event: Special Weather Statement
Message Type: Alert
Urgency: Expected
Severity: Moderate
Certainty: Observed
Affected Area: South Laramie Range Foothills; Central Laramie County
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.
Hydrologic Outlook issued April 26 at 2:33PM MDT by NWS Billings MT
Event: Hydrologic Outlook
Message Type: Alert
Urgency: Future
Severity: Unknown
Certainty: Possible
Affected Area: Big Horn, MT; Carbon, MT; Golden Valley, MT; Musselshell, MT; Park, MT; Powder River, MT; Rosebud, MT; Stillwater, MT; Sweet Grass, MT; Wheatland, MT; Yellowstone, MT; Sheridan, WY
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.
Hydrologic Outlook issued April 26 at 12:24AM MDT by NWS Billings MT
Event: Hydrologic Outlook
Message Type: Alert
Urgency: Future
Severity: Unknown
Certainty: Possible
Affected Area: Big Horn, MT; Carbon, MT; Golden Valley, MT; Musselshell, MT; Park, MT; Powder River, MT; Rosebud, MT; Stillwater, MT; Sweet Grass, MT; Wheatland, MT; Yellowstone, MT; Sheridan, WY
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.