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Belle Fourche, South Dakota 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Belle Fourche SD
National Weather Service Forecast for: Belle Fourche SD
Issued by: National Weather Service Rapid City, SD
Updated: 3:29 am MDT Jun 6, 2025
 
Today

Today: Patchy dense fog before 10am.  Otherwise, mostly sunny, with a high near 72. Light and variable wind becoming east 5 to 10 mph in the afternoon.
Patchy Dense
Fog then
Sunny
Tonight

Tonight: Mostly clear, with a low around 49. Southeast wind 5 to 10 mph becoming southwest after midnight.
Mostly Clear

Saturday

Saturday: A 40 percent chance of showers and thunderstorms, mainly after 4pm.  Mostly sunny, with a high near 78. Breezy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.
Breezy.
Mostly Sunny
then Chance
Showers
Saturday
Night
Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 49. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 40%.
Chance
Showers and
Breezy
Sunday

Sunday: Sunny, with a high near 70. Windy, with a northwest wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 45 mph.
Sunny and
Windy

Sunday
Night
Sunday Night: Mostly clear, with a low around 46. Breezy, with a west wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph.
Mostly Clear
and Breezy
then Mostly
Clear
Monday

Monday: Sunny, with a high near 75. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunny and
Breezy

Monday
Night
Monday Night: Clear, with a low around 48. Northwest wind 5 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Clear

Tuesday

Tuesday: Sunny, with a high near 84.
Sunny

Hi 72 °F Lo 49 °F Hi 78 °F Lo 49 °F Hi 70 °F Lo 46 °F Hi 75 °F Lo 48 °F Hi 84 °F

Hazardous Weather Outlook
 

Today
 
Patchy dense fog before 10am. Otherwise, mostly sunny, with a high near 72. Light and variable wind becoming east 5 to 10 mph in the afternoon.
Tonight
 
Mostly clear, with a low around 49. Southeast wind 5 to 10 mph becoming southwest after midnight.
Saturday
 
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 78. Breezy, with a southwest wind 10 to 15 mph becoming northwest 20 to 25 mph in the afternoon. Winds could gust as high as 35 mph.
Saturday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Sunday
 
Sunny, with a high near 70. Windy, with a northwest wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 45 mph.
Sunday Night
 
Mostly clear, with a low around 46. Breezy, with a west wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph.
Monday
 
Sunny, with a high near 75. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Monday Night
 
Clear, with a low around 48. Northwest wind 5 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
 
Sunny, with a high near 84.
Tuesday Night
 
Mostly clear, with a low around 57.
Wednesday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Wednesday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Thursday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Belle Fourche SD.

Weather Forecast Discussion
460
FXUS63 KUNR 060814
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
214 AM MDT Fri Jun 6 2025

.KEY MESSAGES...

- Some dense fog this morning mainly east of the Black Hills
- Isolated/scattered showers/thunderstorms this afternoon/evening
  and Saturday afternoon/evening
- Warmer/drier Sunday through Tuesday
- Active southwest flow developing Wednesday through the end of
  next week

&&

.DISCUSSION...(Today Through Thursday)
Issued at 208 AM MDT Fri Jun 6 2025

08z surface analysis had weak high over the CWA with
light/variable winds. Antecedent moisture and mostly clear skies
allowing fog/stratus (per METARs/nighttime microphysics RGB) to
develop early this morning, particularly east of the Black Hills
where a Dense Fog Advisory has been hoisted through 15z. Water
vapour loop had upper trough from Hudson Bay to CA with a
shortwave over the ID/MT/WY border, which will affect the area
later today.

Early this morning, areas of Dense Fog will affect the western SD
plains east of the Black Hills. Will continue to monitor if
expansion is needed.

Rest of today/tonight, ID/MT/WY shortwave slides southeast into
the central plains. Main forcing southwest of the CWA, but diurnal
heating will support 250-500J/kg mean SBCAPE from the Black Hills
south/southwest. North end of shortwave combined with terrain
will be enough for isolated/scattered afternoon/evening
convection. Shear is relatively weak with CAMs not painting any
concerning strength to updrafts. Temperatures will be near
guidance.

Saturday, fast-moving upper low over central Canada drags a cool
front through the CWA with 2-4mb/3hr pressure rises and 20-40kt
850mb winds. Breezy/windy spots (NBM 20-40% chance >45mph gusts)
foreseen. Mean SBCAPE along cool front ~500J/kg with increasing
0-6km bulk shear. Wouldn`t be surprised to see a few strong storms
over the far northern reaches of our CWA, but best combination
further northeast, which is inline with SPC HREF portrayal/Day 2
Outlook. Temperatures will be near guidance and much closer to
summer than recent days.

Sunday through Wednesday, upper ridge builds from the Rockies
into the northern Plains. Thermal ridge perks up for
Tuesday/Wednesday with highs careening into the 80s. Upper trough
develops over the western CONUS for the end of the week creating
southwest flow over the northern Plains. If enough moisture
becomes available, suspect active/severe weather season will
begin given subjective pattern recognition and a hint from CSU MLP
guidance. Most ensemble guidance supports temperatures slightly
above normal.

&&

.AVIATION...(For the 06Z TAFS Through 06Z Friday Night)
Issued At 952 PM MDT Thu Jun 5 2025

In the wake of afternoon/evening showers, areas of BR/FG are
developing over the western/central SD plains and far
northeastern WY. MVFR to localized LIFR conditions have already
materialized, with these conditions expected to expand through the
night. Dense fog and accompanying VLIFR conditions may develop
over portions of the west central SD plains by 09z and persist for
several hours. Most significant reductions to vsbys are expected
to remain east of KRAP, and upper-level clouds arriving from the
west may disrupt fog disruption entirely in and around the TAF
site. However, a brief period of LIFR conditions cannot be ruled
out.

Improvement to VFR conditions is expected area-wide by around 15z,
but additional SHRA/TSRA may lead to reduced cigs/vsbys again
tomorrow morning and afternoon.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Dense Fog Advisory until 9 AM MDT /10 AM CDT/ this morning for
     SDZ002-013-014-030>032-042>044-046-047-049-073-076>078.
WY...None.
&&

$$

DISCUSSION/KEY MESSAGES...Helgeson
AVIATION...Sherburn
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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