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  • Wind Advisory

    Ends in 1 h 28 min

    When
    From 11 PM this evening to 9 AM MDT Saturday.
    Where
    Portions of northwestern and southwestern South Dakota.

    Issued for this forecast zone · National Weather Service Rapid City SD

    What, impacts and precautions

    What

    Northwest winds 25 to 35 mph with gusts up to 50 mph expected. A few localized gusts to around 60 mph are possible.

    Impacts

    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.

    Precautionary actions

    Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

    Areas: Ziebach; Rapid City; Custer Co Plains; Pennington Co Plains; Haakon; Western Fall River; Northern Oglala Lakota; Northern Jackson; Sturgis/Piedmont Foothills; Southern Meade Co Plains; Southern Jackson

    See it on weather.gov (opens in a new tab)

Observed 6:55 AM MDT at KRCA

Box Elder, SD weather

Windy and 39°4°, gusts to 36 mph58 km/h today.

Today: low 36°2° (likely 36°2° to 41°5°), high 53°12° (likely 51°11° to 54°12°).

Mostly agree

Now 39°4°

Windy · Feels like 28°−2°

Feels like
28°−2°
Wind chill from 25 mph41 km/h wind · air 39°4°
Wind
25 mph41 km/hgusts 34 mph55 km/h
From the northwest. Easing to 14 mph23 km/h by 2 PM
Dew point
30°−1°
Dry · down to 22°−6° by 11 AM
UV index
0Low
Moderate 12–3 PM · peak 3
Air quality
26Good
Main pollutant: PM10 (dust)

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

18°10° cooler than this time yesterday (57°14° then, 39°4° now)

Good hours for
  • Gusts to 41 mph66 km/h until noon
  • High 52°11° today at 3 PM
  • Drizzle tomorrow from noon (90%, 0.62 in16 mm)
  1. This morningUp to 47°8° by 11 AM · gusts to 41 mph66 km/h · Clear
  2. This afternoonUp to 52°11° by 3 PM · Clear
  3. TonightDown to 39°4° by 1 AM · Mostly cloudy
  4. Tomorrow morningUp to 42°6° by 10 AM · rain chance 20% · Cloudy
  5. Tomorrow afternoonNear 43°6° · Rain all afternoon (70%)
  6. Tomorrow nightDown to 34°1° by 5 AM · Rain all night (90%)
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 7aPartly sunny39°4° (likely 39°4° to 41°5°)28°−2°0%23 mph37 km/h from NW, gusts 41 mph66 km/h62%36%0
Sat 8aMostly sunny39°4° (likely 39°4° to 41°5°)27°−3°0%26 mph42 km/h from NW, gusts 36 mph58 km/h59%18%0
Sat 9aSunny43°6° (likely 41°5° to 43°6°)33°1°0%24 mph39 km/h from NW, gusts 35 mph56 km/h49%14%0
Sat 10aSunny45°7° (likely 43°6° to 45°7°)36°2°0%22 mph35 km/h from NW, gusts 30 mph48 km/h42%11%1
Sat 11aSunny47°8° (likely 45°7° to 48°9°)39°4°0%20 mph32 km/h from NW, gusts 27 mph43 km/h37%1%2
Sat 12pSunny48°9° (likely 47°8° to 50°10°)41°5°0%17 mph27 km/h from N, gusts 24 mph39 km/h32%0%3
Sat 1pSunny49°9° (likely 49°9° to 52°11°)43°6°0%16 mph26 km/h from N, gusts 21 mph34 km/h28%0%3
Sat 2pSunny51°11° (likely 51°11° to 53°12°)51°11°0%14 mph23 km/h from N, gusts 17 mph28 km/h23%1%3
Sat 3pSunny52°11° (likely 51°11° to 53°12°)52°11°0%12 mph19 km/h from N, gusts 15 mph24 km/h22%13%2
Sat 4pSunny51°11° (likely 51°11° to 52°11°)51°11°0%9 mph14 km/h from N, gusts 12 mph20 km/h21%28%1
Sat 5pPartly sunny49°9° (likely 49°9° to 50°10°)46°8°0%7 mph11 km/h from N, gusts 9 mph15 km/h23%33%0
Sat 6pPartly cloudy46°8° (likely 46°8° to 47°8°)45°7°0%3 mph5 km/h from NE, gusts 7 mph11 km/h27%38%0
Sat 7pClear44°7° (likely 43°6° to 46°8°)44°7°0%2 mph3 km/h from N, gusts 6 mph9 km/h30%42%0
Sat 8pClear43°6° (likely 42°6° to 45°7°)43°6°0%1 mph2 km/h from W, gusts 7 mph11 km/h32%41%0
Sat 9pClear42°6° (likely 41°5° to 44°7°)42°6°0%2 mph3 km/h from SW, gusts 8 mph12 km/h34%43%0
Sat 10pClear42°6° (likely 40°4° to 43°6°)40°4°0%3 mph5 km/h from SW, gusts 7 mph11 km/h34%41%0
Sat 11pClear41°5° (likely 38°3° to 42°6°)39°4°0%3 mph5 km/h from SW, gusts 7 mph11 km/h37%43%0
Sun 12aCloudy40°4° (likely 38°3° to 42°6°)38°3°5%3 mph5 km/h from S, gusts 7 mph12 km/h39%77%0
Sun 1aCloudy39°4° (likely 38°3° to 41°5°)37°3°5%3 mph5 km/h from S, gusts 7 mph11 km/h42%79%0
Sun 2aCloudy39°4° (likely 38°3° to 41°5°)37°3°5%3 mph5 km/h from S, gusts 8 mph13 km/h44%80%0
Sun 3aCloudy39°4° (likely 39°4° to 41°5°)36°2°5%5 mph8 km/h from SE, gusts 9 mph14 km/h46%86%0
Sun 4aCloudy39°4° (likely 39°4° to 42°6°)36°2°5%5 mph8 km/h from SE, gusts 10 mph15 km/h48%92%0
Sun 5aCloudy39°4° (likely 39°4° to 42°6°)36°2°5%5 mph8 km/h from SE, gusts 11 mph18 km/h50%98%0
Sun 6aCloudy37°3° (likely 37°3° to 43°6°)33°1°20%5 mph8 km/h from SE, gusts 15 mph24 km/h56%99%0
Sun 7aCloudy37°3° (likely 37°3° to 43°6°)33°1°20%5 mph8 km/h from SE, gusts 15 mph24 km/h59%100%0
Sun 8aCloudy38°3° (likely 38°3° to 44°7°)34°1°20%6 mph10 km/h from SE, gusts 13 mph20 km/h64%100%0
Sun 9aCloudy41°5° (likely 40°4° to 44°7°)37°3°20%6 mph10 km/h from SE, gusts 13 mph20 km/h62%100%0
Sun 10aCloudy42°6° (likely 40°4° to 45°7°)38°3°20%6 mph10 km/h from SE, gusts 12 mph20 km/h65%100%1
Sun 11aCloudy42°6° (likely 40°4° to 45°7°)38°3°20%7 mph11 km/h from E, gusts 14 mph22 km/h70%100%0
Sun 12pCloudy42°6° (likely 40°4° to 45°7°)38°3°70%, 0.07 in1.8 mm7 mph11 km/h from E, gusts 13 mph21 km/h73%100%0
Sun 1pCloudy43°6° (likely 40°4° to 44°7°)39°4°70%, 0.07 in1.8 mm7 mph11 km/h from E, gusts 13 mph21 km/h70%100%1
Sun 2pCloudy45°7° (likely 39°4° to 45°7°)41°5°70%, 0.07 in1.8 mm7 mph11 km/h from E, gusts 14 mph22 km/h65%100%2
Sun 3pCloudy45°7° (likely 39°4° to 45°7°)41°5°70%, 0.07 in1.8 mm7 mph11 km/h from E, gusts 13 mph21 km/h65%100%1
Sun 4pCloudy44°7° (likely 38°3° to 44°7°)40°4°70%, 0.07 in1.8 mm7 mph11 km/h from E, gusts 12 mph20 km/h68%100%0
Sun 5pDrizzle43°6° (likely 38°3° to 43°6°)39°4°70%, 0.07 in1.8 mm7 mph11 km/h from E, gusts 12 mph20 km/h70%100%0
Sun 6pDrizzle40°4° (likely 38°3° to 41°5°)35°2°90%, 0.01 in0.3 mm7 mph11 km/h from E, gusts 13 mph20 km/h82%100%0
Sun 7pSnow38°3° (likely 38°3° to 40°4°)33°1°90%, 0.01 in0.3 mm7 mph11 km/h from E, gusts 12 mph19 km/h89%100%0
Sun 8pCloudy37°3° (likely 37°3° to 40°4°)32°0°90%, 0.01 in0.3 mm7 mph11 km/h from E, gusts 11 mph18 km/h92%100%0
Sun 9pSnow37°3° (likely 36°2° to 39°4°)32°0°90%, 0.01 in0.3 mm7 mph11 km/h from E, gusts 11 mph17 km/h92%100%0
Sun 10pSnow37°3° (likely 36°2° to 39°4°)32°0°90%, 0.01 in0.3 mm7 mph11 km/h from E, gusts 11 mph18 km/h92%100%0
Sun 11pCloudy37°3° (likely 36°2° to 39°4°)32°0°90%, 0.01 in0.3 mm7 mph11 km/h from E, gusts 11 mph17 km/h92%100%0
Mon 12aDrizzle37°3° (likely 36°2° to 38°3°)32°0°80%, 0.01 in0.3 mm6 mph10 km/h from E, gusts 9 mph14 km/h92%100%0
Mon 1aDrizzle36°2° (likely 36°2° to 39°4°)31°−1°80%, 0.01 in0.3 mm6 mph10 km/h from E, gusts 8 mph12 km/h96%100%0
Mon 2aDrizzle36°2° (likely 35°2° to 38°3°)31°−1°80%, 0.01 in0.3 mm6 mph10 km/h from E, gusts 8 mph13 km/h96%100%0
Mon 3aSnow35°2° (likely 35°2° to 38°3°)30°−1°80%, 0.01 in0.3 mm6 mph10 km/h from E, gusts 9 mph15 km/h96%100%0
Mon 4aDrizzle35°2° (likely 34°1° to 37°3°)31°−1°80%, 0.01 in0.3 mm5 mph8 km/h from E, gusts 9 mph15 km/h96%100%0
Mon 5aSnow34°1° (likely 34°1° to 37°3°)30°−1°80%, 0.01 in0.3 mm5 mph8 km/h from NE, gusts 8 mph13 km/h96%100%0
Mon 6aSnow35°2° (likely 35°2° to 37°3°)31°−1°70%, 0.08 in2 mm5 mph8 km/h from NE, gusts 8 mph12 km/h92%100%0

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Mostly sunny. High 53°12°, low 36°2°. Typical 56°13° / 30°−1°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 39°4°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 52°11°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 43°6°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 39°4°

      Dry

    Official NWS forecast

    Today: Mostly sunny. High near 53, with temperatures falling to around 49 in the afternoon. North wind 7 to 26 mph, with gusts as high as 48 mph.

    Tonight: Mostly cloudy. Low around 36, with temperatures rising to around 39 overnight. South wind 1 to 5 mph.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    51°11°–54°12°
    Low, likely
    36°2°–41°5°
    Typical high / low
    56°13° / 30°−1°
    Wind
    29 mph47 km/h, gusts 49 mph79 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Drizzle. High 46°8°, low 34°1°. Typical 56°13° / 30°−1°. Rain 0.06 in1.5 mm, 70% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Cloudy, 38°3°

      20% chance

    2. Afternoon

      noon–6 PM

      Drizzle, 45°7°

      70% chance · 0.42 in11 mm

    3. Evening

      6 PM–midnight

      Snow, 37°3°

      90% chance · 0.06 in1.5 mm

    4. Overnight

      midnight–6 AM

      Snow, 34°1°

      80% chance · 0.06 in1.5 mm

    Official NWS forecast

    Day: A slight chance of snow before 9am, then rain likely. Cloudy. High near 46, with temperatures falling to around 43 in the afternoon. East wind around 7 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Night: Rain before 7pm, then rain and snow. Cloudy, with a low around 34. East wind around 7 mph, with gusts as high as 16 mph. Chance of precipitation is 90%.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    42°6°–46°8°
    Low, likely
    34°1°–38°3°
    Typical high / low
    56°13° / 30°−1°
    Wind
    14 mph23 km/h, gusts 22 mph36 km/h
    UV peak
    2
  3. Monday, Oct 26. Snow. High 41°5°, low 33°1°. Typical 56°13° / 30°−1°. Snow 0–4 in0–10 cm, 70% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Heavy snow, 35°2°

      90% chance · 1.1 in2.7 cm

    2. Afternoon

      noon–6 PM

      Heavy snow, 35°2°

      90% chance · 0.9 in2.3 cm

    3. Evening

      6 PM–midnight

      Cloudy, 32°0°

      50% chance

    4. Overnight

      midnight–6 AM

      Cloudy, 32°0°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Rain and snow likely. Cloudy. High near 41, with temperatures falling to around 39 in the afternoon. East wind around 6 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Night: A slight chance of rain before midnight. Mostly cloudy, with a low around 33. Southeast wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    36°2°–41°5°
    Low, likely
    30°−1°–34°1°
    Typical high / low
    56°13° / 30°−1°
    Wind
    9 mph15 km/h, gusts 17 mph27 km/h
    UV peak
    1
  4. Tuesday, Oct 27. Partly sunny. High 57°14°, low 36°2°. Typical 55°13° / 29°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Fog, 34°1°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 59°15°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 44°7°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 35°2°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 57.

    Night: Partly cloudy, with a low around 36.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    55°13°–64°18°
    Low, likely
    30°−1°–36°2°
    Typical high / low
    55°13° / 29°−2°
    Wind
    22 mph35 km/h, gusts 42 mph68 km/h
    UV peak
    2
  5. Wednesday, Oct 28. Partly sunny. High 60°16°, low 34°1°. Typical 55°13° / 29°−2°. Dry. Mostly agree. Best day outdoors this week.
    1. Morning

      6 AM–noon

      Sunny, 38°3°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 59°15°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 47°8°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 38°3°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 60.

    Night: Partly cloudy, with a low around 34.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    Best day outdoors this week: the one dry, mild day the forecasts agree on (high 60°16°).

    High, likely
    57°14°–61°16°
    Low, likely
    31°−1°–39°4°
    Typical high / low
    55°13° / 29°−2°
    Wind
    8 mph13 km/h, gusts 34 mph55 km/h
    UV peak
    4
  6. Thursday, Oct 29. Partly sunny. High 59°15°, low 37°3°. Typical 54°12° / 28°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 41°5°

      Dry

    2. Afternoon

      noon–6 PM

      Mostly sunny, 61°16°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 50°10°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 41°5°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 59.

    Night: Partly cloudy, with a low around 37.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    57°14°–66°19°
    Low, likely
    35°2°–41°5°
    Typical high / low
    54°12° / 28°−2°
    Wind
    18 mph28 km/h, gusts 32 mph51 km/h
    UV peak
    3
  7. Friday, Oct 30. Mostly cloudy. High 58°14°, low 37°3°. Typical 54°12° / 28°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Mostly sunny, 44°7°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 60°16°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 52°11°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 47°8°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Partly sunny, with a high near 58.

    Night: A slight chance of rain. Mostly cloudy, with a low around 37.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    53°12°–67°19°
    Low, likely
    36°2°–45°7°
    Typical high / low
    54°12° / 28°−2°
    Wind
    23 mph37 km/h, gusts 30 mph47 km/h
    UV peak
    3
  8. Saturday, Oct 31. Drizzle. High 55°13°, low 43°6°. Typical 54°12° / 28°−2°. Rain 0.07 in1.8 mm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 50°10°

      20% chance

    2. Afternoon

      noon–6 PM

      Cloudy, 56°13°

      20% chance

    3. Evening

      6 PM–midnight

      Partly cloudy, 48°9°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 39°4°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    50°10°–63°17°
    Low, likely
    40°4°–47°8°
    Typical high / low
    54°12° / 28°−2°
    Wind
    19 mph31 km/h, gusts 30 mph49 km/h
    UV peak
    3
  9. Sunday, Nov 1. Drizzle. High 50°10°, low 38°3°. Typical 53°12° / 27°−3°. Rain 0.17 in4.3 mm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Rain, 39°4°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 50°10°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 42°6°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 37°3°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    44°7°–56°13°
    Low, likely
    27°−3°–46°8°
    Typical high / low
    53°12° / 27°−3°
    Wind
    24 mph39 km/h, gusts 40 mph64 km/h
    UV peak
    3
  10. Monday, Nov 2. Cloudy. High 53°12°, low 39°4°. Typical 53°12° / 27°−3°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 43°6°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 53°12°

      Dry

    3. Evening

      6 PM–midnight

      Mostly clear, 45°7°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    46°8°–62°17°
    Low, likely
    36°2°–42°6°
    Typical high / low
    53°12° / 27°−3°
    Wind
    13 mph21 km/h, gusts 26 mph42 km/h
    UV peak
    3

The outlook

  1. Today

    Dry, high 53°, low 36°.

  2. Tomorrow

    70% chance of rain, high 46°, low 34°, cooling off.

  3. Monday

    74% chance of snow, high 41°, low 33°, cooling off.

  4. Rest of week

    Mostly dry, highs 50–60°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (UNR) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Rapid Creek above Water Reclamation Facility near Rapid City

5.9 mi
Below flood stage
Level
3.4 ft
Flow
26 cfs

Reading from Sat 6:15 AM · NWS gauge page

Rapid Creek at Founders Park

8.1 mi
Below flood stage
Level
3.2 ft

Reading from Sat 5:30 AM · NWS gauge page

Elk Creek (SD) near Rapid City

9.6 mi
Below flood stage
Level
4.1 ft

Reading from Sat 6 AM · NWS gauge page

Rapid Creek above Canyon Lake near Rapid City

12 mi
Below flood stage
Level
1.5 ft
Flow
6 cfs

Reading from Sat 6:25 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 71% less heating than a typical week.

This week 47Typical 160

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
41
h below 17°F
0
h below 5°F
0

47, 17 and 5°F are the test points heat pumps are rated at. About 13 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 30°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Rapid City Regional Airport · official normals 1991–2020 · records 1942–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Normal high / low
56°13° / 30°−1°
Forecast high / low
53°12° / 36°2°
Record high
84°29° in 1978
Record low
15°−9° in 1942

Last 7 days vs normal

On average 13°7° warmer than normal (daily mean temperature).

  1. +8°+4°SunOct 18
  2. +3°+2°MonOct 19
  3. +14°+8°TueOct 20
  4. +13°+7°WedOct 21
  5. +21°+11°ThuOct 22
  6. +21°+12°FriOct 23
  7. —SatOct 24

Box Elder weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 7:18 AM, sunset 5:53 PM.

Daylight
10 h 35 min
Losing 2 min 49 s a day; shortest Dec 21, 1 h 43 min less
Golden hour
5:13–6:11 PM
Morning 7:00–7:59 AM
Blue hour
6:11–6:23 PM
Morning 6:49–7:00 AM; first light 6:49 AM

Stars tonight? Poor

Clouds most of the night (about 66% cover).

Moon

Waxing gibbous

97% lit · growing

Today
sets 5:33 AM · rises 4:53 PM
Full moon
Oct 25
New moon
Nov 9
Looking west from Box Elder. The highest point on the skyline is about 7,100 ft, 37 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.