Rock Springs, Wyoming 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Rock Springs WY
National Weather Service Forecast for:
Rock Springs WY
Issued by: National Weather Service Riverton, WY |
Updated: 7:29 pm MDT Mar 30, 2025 |
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Tonight
 Mostly Cloudy
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Monday
 Chance Rain/Snow and Breezy
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Monday Night
 Breezy. Rain/Snow then Chance Snow Showers
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Tuesday
 Slight Chance Snow Showers and Breezy
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Tuesday Night
 Partly Cloudy and Blustery then Partly Cloudy
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Wednesday
 Chance Snow Showers
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Wednesday Night
 Mostly Cloudy
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Thursday
 Mostly Sunny
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Thursday Night
 Partly Cloudy
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Lo 28 °F |
Hi 49 °F |
Lo 26 °F |
Hi 40 °F |
Lo 24 °F |
Hi 42 °F |
Lo 22 °F |
Hi 45 °F |
Lo 24 °F |
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Tonight
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Mostly cloudy, with a low around 28. South southwest wind 5 to 9 mph. |
Monday
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A chance of rain and snow showers between 11am and 2pm, then a chance of rain showers after 2pm. Some thunder is also possible. Mostly cloudy, with a high near 49. Breezy, with a south southwest wind 6 to 11 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 40%. Little or no snow accumulation expected. |
Monday Night
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Rain and snow showers likely before 11pm, then snow showers. Some thunder is also possible. Low around 26. Breezy, with a west wind 19 to 24 mph decreasing to 11 to 16 mph in the evening. Winds could gust as high as 37 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible. |
Tuesday
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A 20 percent chance of snow showers. Partly sunny, with a high near 40. Breezy, with a west wind 16 to 24 mph, with gusts as high as 36 mph. |
Tuesday Night
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Partly cloudy, with a low around 24. Blustery, with a west wind 11 to 21 mph, with gusts as high as 33 mph. |
Wednesday
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A 30 percent chance of snow showers, mainly after noon. Partly sunny, with a high near 42. West wind 11 to 14 mph, with gusts as high as 23 mph. |
Wednesday Night
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Mostly cloudy, with a low around 22. West wind 6 to 9 mph becoming south after midnight. |
Thursday
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Mostly sunny, with a high near 45. |
Thursday Night
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Partly cloudy, with a low around 24. |
Friday
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Mostly sunny, with a high near 48. Breezy. |
Friday Night
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Partly cloudy, with a low around 26. Blustery. |
Saturday
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A slight chance of snow showers. Mostly sunny, with a high near 47. Breezy. |
Saturday Night
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Partly cloudy, with a low around 24. Blustery. |
Sunday
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Sunny, with a high near 52. |
Forecast from NOAA-NWS
for Rock Springs WY.
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Weather Forecast Discussion
983
FXUS65 KRIW 310211
AFDRIW
Area Forecast Discussion
National Weather Service Riverton WY
811 PM MDT Sun Mar 30 2025
.KEY MESSAGES...
- Light snow continues across the western mountains tonight, but
any accumulations remain under an inch.
- Showers and isolated thunderstorms are likely (70-80%) for
much of the forecast area Monday and Tuesday, with light snow
overnight, especially western and northern portions.
- The active weather pattern continues through the middle of the
week, but precipitation chances will decrease heading into the
latter half of the week as high pressure settles in this
upcoming weekend.
- Temperatures will remain cool through this week and begin to
increase by next Sunday.
&&
.UPDATE...
Issued at 205 PM MDT Sun Mar 30 2025
The low continues sliding northeast through central Wyoming
this morning, which is right on track. An area of moderate
snowfall developed on the north side of this low and dropped a
few inches of snow in the Wind River Basin, and continues to
drop snow in the Bighorn Mountains and Absaroka Mountains this
afternoon. Most locations only had snow accumulate on elevated
surfaces and in the grass, but there was about an inch of slushy
snow on roadways in some locations. This slush has melted as
the snow pushes northeast out of the area this afternoon and
skies clear a bit. Extended the Winter Weather Advisory for the
Absaroka Mountains until 6 PM this evening as convective snow
showers have developed this afternoon and will result in a few
more inches of snow along the eastern slopes of the Absaroka
Mountains. The Winter Weather Advisory for the eastern slopes of
the Wind River Mountains expired at noon today as snow has all
but ended there. The Winter Weather Advisory for the Bighorns
will remain in effect until 6 PM this evening as another few
inches of snow will fall there. All snow showers will end this
evening, but the next system approaches from the west tonight
and brings snow chances back into western Wyoming after
Midnight.
&&
.DISCUSSION...
Issued at 111 AM MDT Sun Mar 30 2025
Precipitation will continue (basically) along and east of the Divide
through the rest of the morning, which would be from Yellowstone to
the Wind River Mountains and far northern portions of Sweetwater
County. Snow will be ongoing over these areas through early in
the afternoon, although accumulations will be confined to grassy
areas after sunrise. Additional isolated showers will redevelop
across the forecast area, especially northwestern portions,
through the afternoon.
A ridge will build over the region tonight into Monday irt another
strong upper low off the PACNW coast. This will keep Pacific
moisture streaming over the region and troughs ejecting from this
system move over the CWA. Additional showers will reach far western
portions Monday morning, with another round of showers developing
over southern portions in the afternoon. Isolated thunderstorms
could occur in these areas through the afternoon. Isolated showers
and thunderstorms will also be possible east of the Divide, as the
shortwave trough moves eastward. This activity will continue through
the evening. Snow levels will average between 6000 and 7000ft across
most of the forecast area, but again any snow that falls during the
day will have little to no impact and accumulate in grassy areas.
The aforementioned shortwave trough will slow down Monday night and
become better organized into a midlevel low, dropping temperatures
and allow for rain to change over to snow over western portions.
This activity will continue through much of the day Tuesday, as the
low slowly moves over the Bighorn Basin and Johnson/Natrona
counties. As a result, most of the precipitation over northern
portions will occur under a developing baroclinic leaf from the
midlevel low. Rain/snow to snow will push into northern portions of
the Bighorn Basin and northern Johnson County Tuesday evening. This
activity will spread southward through the night as the low tracks
over the Black Hills.
Forecast details become less clear by Wednesday. Showers remain
possible for much of the area, but will be dependent on how much
influence from the exiting low/storm remains. Additionally, the
remnants from the PACNW low look to dive southward over the Four
Corners region, so forecast details are highly in flux through the
rest of the period. No clear signal for wet conditions to continue
or more drier conditions to occur.
&&
.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 351 PM MDT Sun Mar 30 2025
The latest shortwave will continue to exit the region. Overall,
conditions will gradually improve across east of the Divide
terminals through the afternoon and evening with prevailing VFR for
most terminals after 06Z Monday.
Hi-res models continue to indicate that there will be some initial
convection overnight tonight ahead of the next shortwave. Most
likely impacts from this initial push of moisture would be at KJAC
(30% chance) and KBPI and KPNA (15-30% chances). Occasional MVFR
conditions are possible (20% chance) with these showers.
The next shortwave will move into the region Monday morning, with
west of the Divide terminals starting to see MVFR/IFR impacts after
sunrise. Any precipitation Monday will be showery in nature and thus
it is hard to pinpoint exact timing and locations. Due to the low
confidence, have mostly left shower mentions for Monday afternoon
out of the TAFs for now. Westerly winds will increase at several
terminals Monday afternoon as well, with gusts to 20kts possible at
KCOD, KCPR, and KRKS.
Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for
the latest information on icing and turbulence forecasts.
&&
.RIW WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
UPDATE...Rowe
DISCUSSION...LaVoie
AVIATION...Hensley
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