Spearfish, South Dakota Weather Conditions

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Current Conditions

  • 32°
  • Clear
  • Wind: West 14 mph
  • Humidity: 55%
  • Visibility: N/A
  • Dew Point: 18°
  • Pressure: 30.15 in. 0
  • Heat Index: 22

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Next 12 Hours

7  pm
10  pm
1  am
4  am
7  am
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Partly Cloudy
  • High: 48 °
  • Low: 29 °
  • Partly Cloudy
  • Sunday
  • Partly Cloudy
  • High: 34 °
  • Low: 23 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 38 °
  • Low: 34 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 49 °
  • Low: 37 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 53 °
  • Low: 38 °
  • Partly Cloudy

Forecast for Spearfish, South Dakota

Updated: 2:32 PM MST on February 5, 2016

High wind watch in effect from late Saturday night through Sunday evening...
  • Tonight

    Mostly clear. Lows in the lower 30s. Southwest winds 10 to 15 mph with gusts up to 25 mph.

  • Saturday

    Breezy. Partly cloudy. Highs in the upper 40s. Southwest winds 10 to 15 mph with gusts up to 25 mph increasing to west 15 to 25 mph with gusts up to 45 mph in the afternoon.

  • Saturday Night

    Breezy. Partly cloudy. A 20 percent chance of rain showers and snow showers in the evening. Lows in the upper 20s. West winds 20 to 30 mph with gusts up to 55 mph.

  • Sunday

    Very windy. Partly cloudy in the morning then clearing. Highs in the mid 30s. Northwest winds 30 to 45 mph with gusts up to 60 mph.

  • Sunday Night

    Windy. Partly cloudy. Lows 15 to 20. Northwest winds 25 to 35 mph with gusts up to 50 mph decreasing to 15 to 25 mph with gusts up to 40 mph after midnight.

  • Monday

    Breezy. Partly cloudy. Highs in the upper 30s.

  • Monday Night

    Partly cloudy. Lows in the lower 30s.

  • Tuesday

    Mostly sunny. Highs in the upper 40s.

  • Tuesday Night

    Mostly clear. Lows in the lower 30s.

  • Wednesday

    Mostly sunny. Highs in the lower 50s.

  • Wednesday Night

    Mostly clear. Lows in the lower 30s.

  • Thursday

    Partly cloudy. Highs in the mid 40s.

  • Thursday Night

    Partly cloudy. Lows in the upper 20s.

  • Friday

    Partly cloudy. Highs in the lower 40s.

Severe Weather Alert Descriptions

 High Wind Watch  Statement as of 2:52 PM CST on February 5, 2016/

... High wind watch now in effect from late Saturday night through
Sunday evening...

* timing... early Sunday morning through Sunday afternoon.

* Winds... northwest 35 to 45 mph with gusts up to 70 mph.

* Impacts... the high winds can blow down large trees... and
damage roofs... small outbuildings... and signs. Sudden wind
gusts can cause drivers to lose control... especially in
lightweight or high profile vehicles. Strong winds can cause
blowing dust... reduced visibility... and flying debris.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: TMWC, Spearfish, SD

Updated: 7:41 PM MST

Temperature: 33.8 °F Dew Point: 17 °F Humidity: 49% Wind: SSW at 13.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 25 °F Graphs

Location: Maitland Road, Spearfish, SD

Updated: 7:41 PM MST

Temperature: 30.0 °F Dew Point: 18 °F Humidity: 61% Wind: North at - Pressure: 30.22 in Hourly Precipitation: - Windchill: 30 °F Graphs

Location: NonFedAWOS, Belle Fourche, SD

Updated: 6:55 PM MST

Temperature: 32 °F Dew Point: 19 °F Humidity: 59% Wind: WSW at 5 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 27 °F Graphs

Location: Sundance (Hwy 111 - Aladdin), Sundance, WY

Updated: 7:40 PM MST

Temperature: 28.8 °F Dew Point: 18 °F Humidity: 63% Wind: SSW at 17.6 mph Pressure: 30.17 in Hourly Precipitation: - Windchill: 17 °F Graphs

Location: Grier Avenue, Lead, SD

Updated: 7:38 PM MST

Temperature: 58.6 °F Dew Point: 20 °F Humidity: 22% Wind: North at - Pressure: 29.92 in Hourly Precipitation: - Windchill: - Graphs

Location: Dumont Trailhead, Lead, SD

Updated: 7:35 PM MST

Temperature: 22.7 °F Dew Point: 15 °F Humidity: 72% Wind: NW at 5.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Windchill: 16 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Area forecast discussion for western South Dakota and northeastern Wyoming 
National Weather Service Rapid City South Dakota 
206 PM MST Friday Feb 5 2016 

Short term...this evening through Sunday night 
issued at 205 PM MST Friday Feb 5 2016 

Potent middle level impulse in the Pacific northwest will quickly advect east 
across the northern plains this weekend...supporting mild conds 
Sat...and cooler but very windy conds Sunday. Biggest concern with 
this system will be strong northwest winds...with a very good setup for 
widespread 50-70 miles per hour winds across northwest South Dakota sun. 

Tonight...warm air advection will spread over the region with strong surface 
pressure falls ensuing. This will support increasing SW winds over 
NE Wyoming and in the favored northern bh downslope areas...with winds 
of 20-30 and gusts in the 40s expected there later tonight. Warm air advection 
/pos-Theta-E will eventually support a band of middle cloud/virga 
over the area toward dawn over western areas. 

Sat/sun...positive Theta-E band will shift quickly east across the 
area...with at most a few sprinkles/flurries possible...certainly 
not enough to mention in the forecast. Otherwise...surface cold front 
will enter the area by afternoon...with surface pressure rises and cold air advection 
advection ensuing across the northwest. Linked wind profiles/moderate 
mixing/and isallobaric alignment with the ll flow will support 
good translation of stronger flow to the surface. In 
addition...geostrophic winds at h925 indicate 70+ knots across northwest 
South Dakota...which should support surface gusts in excess of 60 knots. 
Hence...have decided to issue a High Wind Warning across far northwest South Dakota 
starting Sat afternoon. Stronger flow is not expected over the 
southern half of the area until Sunday morning and will let the 
watch ride as this system is forecast to come in about 6 hours 
earlier...leading to a shift in maximum winds aloft more toward Sun 
morning as apposed to Sun afternoon. Buffer profiles indicate the 
potential for 60-70 miles per hour gust at all place in the watch/warning 
outside of the Black Hills...which seems very reasonable given 
mixing potentials. Also extended the watch to the Black Hills as 
concerns over tree falls per Pine beetle kills. Winds of 40-60 miles per hour 
will be possible in parts of the hills...especially on ridges. 

Retained a low chance for some light rain or snow across the 
northern bh and northwest South Dakota Sat evening...although drier profiles 
certainly Don/T warrant more than slight chance probability of precipitation at this time. A weak 
upslope signal is present in the northern Black Hills...however 
lack of appreciable moisture will highly limit any activity. 

As for temperatures...expect very mild conds Sat with some 50s expected 
on the South Dakota plains...possibly even a 60 or two depending on cloud 
cover. Cooler conds are expected sun...with mostly 30s and a few 

Long term...Monday through Friday 
issued at 205 PM MST Friday Feb 5 2016 

A large scale ridge builds over the western Continental U.S. On 
Monday and Tuesday...before shifting east and breaking down by 
midweek. A weak wave passes through the flow Thursday and then the 
upper flow becomes more zonal for next weekend. Temperatures will 
remain cool on Monday but will warm quite a bit for Tuesday and 
Wednesday. There will be a slight cool down on Thursday...before 
rebounding for the end of the week. Overall temperatures will be 
above average for the entire extended forecast period. 


Aviation...for the 00z tafs through 00z Saturday evening 
issued at 205 PM MST Friday Feb 5 2016 

VFR conditions expected through the period. Winds will 
increase through the day on Saturday...with very strong west to 
northwest winds beginning around midday...especially across the 
northwestern South Dakota plains. 


Unr watches/warnings/advisories... 
South Dakota...high wind watch from late Saturday night through Sunday evening 
for sdz014-024>026-028>032-043-044-046-047-049-072>074. 

High Wind Warning from 2 PM Saturday to 8 PM MST Sunday for 

Wyoming...high wind watch from late Saturday night through Sunday evening 
for wyz057-071. 



Short term...jc 
long term...mls 

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