Boulder

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Flyable

Medium confidence · 5 of 6 models agree · Run: HRRR

Wind now: E (98°) Green = in the window · amber = cross/edge · red = wrong way

Wind

mph base

Gusts

mph

Direction

98°

Aloft

E @ridge

Thermals

Light

base ~8000ft

Temp

74°

Cloudbase

14,250

ft MSL

Elevation

6,250

ft MSL

Flyable Caution / slim window Not flyable

What we look for here

Wind directionNE (45°) → SE (135°)
Ideal speed3–10 mph
Upper limits≤ 15 mph base · gusts ≤ 20

Boulder / Wonderland Lake (RMHPA chapter). Four east-facing launches (Upper, Halfway Bench, Three-Quarter, South). Ideal wind FROM NE-SE (~45-135 deg); club guide says East best, South can work, NNE-SSE reasonable (marginal ~22-157). South Wonderland launch works best E-NE. Ideal speed ~3-10 mph, max usable 15 mph, gust factor limit ~5 mph. Thermic site: weak lift AM, strong midday. Thermals start ~10:30-12:30; midday is strong (advanced only, H3/P3/M2 + TUR rec). Gentler buoyant evening cycle as shade comes in ~3-4pm. HAZARDS: North winds dangerous - rotor can shut down site, especially North Launch; a tree on Upper launch causes rotor in NNE. Westerly shift risk = going over the back into the lee of the Rockies (the whole range sits to the west). High winds aloft turbulent over Rockies; keep winds <17 mph at 10k-15k ft. RATING/ACCESS: P2/H2/M1 min with High Altitude endorsement (elev 6250 ft); P1/H1 supervised. Midday needs P3/H3/M2+ with TUR skill.

Next 7 days How calls are made

Today Flyable flyable 8am–7pm

5g6

NNW

5g7

NNE

5g6

ENE

5g5

ENE

10a

5g5

ESE

11a

5g6

ENE

12p

7g7

ENE

6g7

ENE

6g6

7g7

5g5

ESE

3g4

4g5

ESE

3g4

Prime conditions 8am–7pm — best around 8am: 5 mph ENE, gusts 6. Smooth air — little thermal activity.

Tomorrow Flyable flyable 9am–3pm

5g5

3g3

WNW

2g4

4g9

ESE

10a

4g5

ESE

11a

5g12

ESE

12p

7g13

7g14

7g20

6g17

ESE

16g21

NNW

14g19

WNW

13g22

WNW

12g22

WNW

Prime conditions 8am–3pm — best around 10am: 4 mph ESE, gusts 5. 7 clean hrs, the rest borderline. Smooth air — little thermal activity.

Wednesday Flyable flyable 6am–7am

6g11

ESE

7g8

8g28

14g34

10a

18g38

11a

18g37

12p

18g37

WNW

11g28

12g31

13g33

WNW

13g34

13g33

13g32

12g28

NNW

Prime conditions 6am–7am — best around 7am: 7 mph E, gusts 8. Smooth air — little thermal activity.

Thursday Flyable flyable 6am–3pm

1g5

2g7

3g11

ENE

4g14

ENE

10a

5g16

ENE

11a

5g17

ENE

12p

5g17

ENE

5g17

ENE

5g17

ENE

5g17

5g18

7g19

NNE

7g19

6g18

NNW

Flyable 6am–5pm — best around 9am: 4 mph ENE, gusts 14. 9 clean hrs, the rest borderline. Gusty — +10 mph over base.

Friday Not flyable flyable 10am–4pm

2g14

WSW

1g14

SSW

2g14

3g14

10a

4g15

11a

5g16

12p

6g17

6g18

7g19

ENE

7g20

ENE

5g20

4g20

5g19

WNW

Flyable 8am–4pm — best around 10am: 4 mph E, gusts 15. 7 clean hrs, the rest borderline. Gusty — +11 mph over base.

Saturday Not flyable no window

6g13

WSW

4g14

WSW

1g16

WNW

2g17

10a

2g17

11a

2g16

12p

2g17

4g19

WNW

8g22

10g24

9g26

6g27

WNW

4g27

Wind's out of the WNW most of the day — outside the working window, so cross/tail or rotor.

Sunday Not flyable no window

6g21

WSW

6g21

7g21

WNW

10a

7g21

WNW

11a

7g21

WNW

12p

7g21

5g22

2g23

1g24

ESE

4g25

ESE

6g26

7g26

6g25

ESE

Wind's out of the WNW most of the day — outside the working window, so cross/tail or rotor.

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Conditions are an automated estimate from public forecast models, not a go/no-go call. Always check the sky, talk to locals, and fly within your rating. You are responsible for your own safety.