default:

Icon D2 km

MF Arome 1.3

UKMO UK 2

DMI HARMONIE 2

DWD Icon D 2

MF Arome 2.5

KNMI EU 5.5

DWD ICON EU 7

UKMO Global 10

DWD ICON Global 11

MF Arpege EU 11

GFS global 13

GFS GRAPES 13

BOM ACCESS 15

GEM Global 15

GFS GraphCast 25

ECMWF IFS 25

ECMWF AIFS 28

ECMWF IFS 44

JMA gSM 55

MF Arpege 55

Modèle	Icon D2 km run: 09/05 11:13																													Icon EU 7 km run: 09/05 11:13																																											Icon Global 11 km run: 09/05 11:13																																GFS 13 km run: 09/05 11:13																																																																unknown run: 09/05 11:13
Date Optimal	Ve 9 7h	Ve 9 8h	Ve 9 9h	Ve 9 10h	Ve 9 11h	Ve 9 12h	Ve 9 13h	Ve 9 14h	Ve 9 15h	Ve 9 16h	Ve 9 17h	Ve 9 18h	Ve 9 19h	Ve 9 20h	Sa 10 6h	Sa 10 7h	Sa 10 8h	Sa 10 9h	Sa 10 10h	Sa 10 11h	Sa 10 12h	Sa 10 13h	Sa 10 14h	Sa 10 15h	Sa 10 16h	Sa 10 17h	Sa 10 18h	Sa 10 19h	Sa 10 20h	Di 11 6h	Di 11 7h	Di 11 8h	Di 11 9h	Di 11 10h	Di 11 11h	Di 11 12h	Di 11 13h	Di 11 14h	Di 11 15h	Di 11 16h	Di 11 17h	Di 11 18h	Di 11 19h	Di 11 20h	Lu 12 6h	Lu 12 7h	Lu 12 8h	Lu 12 9h	Lu 12 10h	Lu 12 11h	Lu 12 12h	Lu 12 13h	Lu 12 14h	Lu 12 15h	Lu 12 16h	Lu 12 17h	Lu 12 18h	Lu 12 19h	Lu 12 20h	Ma 13 6h	Ma 13 7h	Ma 13 8h	Ma 13 9h	Ma 13 10h	Ma 13 11h	Ma 13 12h	Ma 13 13h	Ma 13 14h	Ma 13 15h	Ma 13 16h	Ma 13 17h	Ma 13 18h	Ma 13 19h	Ma 13 20h	Me 14 6h	Me 14 7h	Me 14 8h	Me 14 9h	Me 14 10h	Me 14 11h	Me 14 12h	Me 14 13h	Me 14 14h	Me 14 15h	Me 14 16h	Me 14 17h	Me 14 18h	Me 14 19h	Me 14 20h	Je 15 6h	Je 15 7h	Je 15 8h	Je 15 9h	Je 15 10h	Je 15 11h	Je 15 12h	Je 15 13h	Je 15 14h	Je 15 15h	Je 15 16h	Je 15 17h	Je 15 18h	Je 15 19h	Je 15 20h	Ve 16 6h	Ve 16 7h	Ve 16 8h	Ve 16 9h	Ve 16 10h	Ve 16 11h	Ve 16 12h	Ve 16 13h	Ve 16 14h	Ve 16 15h	Ve 16 16h	Ve 16 17h	Ve 16 18h	Ve 16 19h	Ve 16 20h	Ve 16 21h	Sa 17 6h	Sa 17 7h	Sa 17 8h	Sa 17 9h	Sa 17 10h	Sa 17 11h	Sa 17 12h	Sa 17 13h	Sa 17 14h	Sa 17 15h	Sa 17 16h	Sa 17 17h	Sa 17 18h	Sa 17 19h	Sa 17 20h	Sa 17 21h	Di 18 6h	Di 18 7h	Di 18 8h	Di 18 9h	Di 18 10h	Di 18 11h	Di 18 12h	Di 18 13h	Di 18 14h	Di 18 15h	Di 18 16h	Di 18 17h	Di 18 18h	Di 18 19h	Di 18 20h	Di 18 21h	Lu 19 6h	Lu 19 7h	Lu 19 8h	Lu 19 9h	Lu 19 10h	Lu 19 11h	Lu 19 12h	Lu 19 13h	Lu 19 14h	Lu 19 15h	Lu 19 16h	Lu 19 17h	Lu 19 18h	Lu 19 19h	Lu 19 20h	Lu 19 21h	Ma 20 6h	Ma 20 7h	Ma 20 8h	Ma 20 9h	Ma 20 10h	Ma 20 11h	Ma 20 12h	Ma 20 13h	Ma 20 14h	Ma 20 15h	Ma 20 16h	Ma 20 17h	Ma 20 18h	Ma 20 19h	Ma 20 20h	Ma 20 21h	Me 21 6h	Me 21 7h	Me 21 8h	Me 21 9h	Me 21 10h	Me 21 11h	Me 21 12h	Me 21 13h	Me 21 14h	Me 21 15h	Me 21 16h	Me 21 17h	Me 21 18h	Me 21 19h	Me 21 20h	Me 21 21h	Je 22 6h	Je 22 7h	Je 22 8h	Je 22 9h	Je 22 10h	Je 22 11h	Je 22 12h	Je 22 13h	Je 22 14h	Je 22 15h	Je 22 16h	Je 22 17h	Je 22 18h	Je 22 19h	Je 22 20h	Je 22 21h	Ve 23 6h	Ve 23 7h	Ve 23 8h	Ve 23 9h	Ve 23 10h	Ve 23 11h	Ve 23 12h	Ve 23 13h	Ve 23 14h	Ve 23 15h	Ve 23 16h	Ve 23 17h	Ve 23 18h	Ve 23 19h	Ve 23 20h	Ve 23 21h	Sa 24 6h	Sa 24 7h	Sa 24 8h	Sa 24 9h	Sa 24 10h	Sa 24 11h	Sa 24 12h	Sa 24 13h	Sa 24 14h	Sa 24 15h	Sa 24 16h	Sa 24 17h	Sa 24 18h	Sa 24 19h	Sa 24 20h	Sa 24 21h
Dir. vent
V. moy. (kmh)	8	9	10	9	10	10	9	7	8	10	10	13	14	17	3	4	2	2	1	1	3	4	4	4	3	5	5	4	4	6	6	5	8	8	8	8	10	10	11	11	10	10	8	6	4	4	2	1	0	1	2	3	4	4	5	6	5	4	3	1	2	3	5	6	7	7	8	8	9	8	8	7	5	4	4	4	4	6	8	9	10	11	11	12	12	12	10	8	7	6	7	8	11	14	17	19	20	21	21	21	20	18	15	13	7	8	9	11	15	17	19	19	20	19	23	25	20	12	7	5	6	7	8	9	12	14	15	16	17	18	18	17	15	12	10	8	6	7	8	10	11	13	13	14	14	13	12	11	10	8	6	5	4	4	4	2	2	4	6	6	6	6	6	6	5	5	5	5	1	4	6	6	5	4	2	1	3	5	6	6	6	5	5	5	5	4	4	4	5	5	6	6	6	7	10	11	10	8	6	6	9	8	8	8	7	7	7	7	9	11	14	17	17	16	16	15	15	15	16	14	12	11	14	18	20	20	18	17	16	15	15	14	13	12	11	10	11	12	12	12	12	12	13	12	10	7	5	4
V. max. (kmh)	29	28	34	27	20	21	20	19	20	23	27	33	44	54	10	9	11	13	12	11	14	16	14	15	14	14	14	15	20	19	20	21	36	38	38	37	33	32	33	33	32	31	28	29	11	11	10	10	10	10	11	13	14	17	19	22	20	17	15	12	15	18	21	24	27	27	27	27	27	27	28	26	24	23	24	24	24	28	31	34	34	34	34	34	35	35	33	30	28	47	48	48	47	46	46	50	54	58	57	55	54	50	46	42	44	45	46	47	47	48	50	52	55	29	30	30	26	20	15	13	10	14	18	20	22	24	25	26	27	26	25	25	26	28	27	22	11	15	19	22	24	25	25	24	23	20	17	14	11	9	7	6	4	4	4	4	4	4	4	4	5	5	6	6	5	4	4	4	4	7	9	8	5	4	3	2	3	4	6	8	8	7	6	5	5	5	5	5	5	5	5	5	6	8	10	12	12	11	11	12	24	25	27	27	26	26	27	27	29	31	34	36	37	36	36	39	39	37	35	34	34	34	34	33	33	33	34	34	35	36	36	36	32	28	25	24	24	23	22	20	19	20	20	20	17	13	9	7
Temp. (°C)	1	2	4	5	6	6	6	6	7	7	7	7	7	6	4	4	6	7	9	10	10	10	11	11	12	12	11	11	10	7	7	9	9	10	12	13	14	15	15	16	15	15	14	12	6	6	8	8	9	10	10	9	9	9	9	9	9	9	8	6	6	7	7	7	8	9	10	11	11	12	12	12	11	10	4	5	6	7	8	9	10	11	12	13	13	13	12	12	10	5	5	6	7	9	10	11	13	14	14	14	14	14	13	12	5	6	6	7	8	9	10	11	12	14	13	12	11	10	9	7	0	2	3	5	7	9	10	11	12	12	13	13	12	10	8	6	-1	0	1	3	5	7	9	10	11	12	13	12	11	10	8	6	2	4	6	9	11	13	13	12	11	11	11	10	9	8	7	7	6	6	6	8	9	10	10	10	10	10	10	10	10	9	8	7	6	6	7	7	8	9	10	12	13	13	12	11	10	10	9	9	6	5	5	5	6	6	6	5	5	7	9	10	10	10	9	8	3	4	5	5	4	4	5	7	9	9	8	8	7	6	5	4	3	4	4	4	5	5	6	6	7	8	8	8	8	7	6	5
Précip. (mm)																																																			0.3	0.3	0.3	2.2	2.2	2.2	0.4	0.4	0.4																																																																																																				0.2	0.2	0.2	0.3	0.3	0.3	0.6	0.6	0.6	0.4							0.2	0.2	0.2	0.5	0.5	0.5	0.2	0.2	0.2	0.2										0.1	0.1	0.1					0.1	0.1	0.1	0.3	0.3	0.3	0.1	0.1	0.1																	0.1	0.1	0.1	0.1	0.1	0.1					0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Nébul. tot. (%)	100	100	100	83	89	100	100	100	100	100	100	94	81	6			32	9	15	61	82	83	86	77	86	90	83	75	39						26	41	38	34	31	27	39	99	100	100	100	95	94	96	98	100	99	98	97	98	99	100	100	100	100	98	99	100	100	100	100	98	95	93	89	85	81	83	85	87	91	96	100	72	45	17	21	26	30	34	39	43	40	38	35							9	18	27	49	71	93	75	56	38	10	20	30	42	54	66	56	47	37	8	13	17	15	14	12	8										7	15	22	46	69	93	66	7	6	6	4	2												1	1	2	28	53	79	76	73	70	77	84	91	94	97	100	100	100	100	100	100	99	99	99	100	100	100	100	100	100	100	100	100	93	91	88	89	89	90	85	81	76	78	80	82	85	89	92	94	100	100	100	100	100	100	100	100	100	93	86	79	63	46	30	21	98	96	94	96	98	100	100	100	100	100	100	100	100	100	100	97	62	76	90	93	97	100	94	87	81	80	79	78	85	93	100	89
Nébul. haute (%)																																									15	97	100	100	100	79	27	51	76	100	81	63	44	63	81	100	69	37	6	79	90	100	76	52	28	33	38	43	29	14		14	29	43	37	68	100	69	37	6	4	2						1	1																																									2	3	5	4	4	3	4	5	5	5	3	2															1	1	2	3	5	6	30	55	79	86	93	100	100	69	45	22	39	56	73	82	90	99	99	100	100	100	100	100	100	7	6	5	4	3	2	2	3	3	23	43	63	67	70	74	55	100	100	100	100	100	100	69	38	7	6	4	3	2	1			79	58	37	49	61	73	82	91	100	100	100	100	96	92	88	74	2	2	2	1	1		2	3	5	16	26	37	58	79	100	79
Nébul. moy. (%)	100	100	100			69	32	64	25	31	43		66				32	9	16	6			7	12	8	68	5	6																	38	92	84	89	93	98	90	82	74	83	91	100	100	100	100	62	63	65	75	85	95	91	88	84	79	74	69	69	70	70	91	95	100	67	33																				29	57	86	63	39	16																																																				2	3	5	15	25	35	47	58	70	80	90	100	100	87	84	82	82	82	82	76	70	64	63	61	60	73	87	100	100	48	45	43	30	16	3	3	3	3	9	16	22	16	11	5	5	83	91	100	100	100	100	89	79	68	45	23									7	14	21	34	48	61	70	79	88	92	96	100	91	3	4	5	13	22	30	34	38	42	29	15	2	1	1		11
Nébul. basse (%)		52	88	83	89	100	100	100	100	100	100	94	38	6					4	58	82	83	81	70	81	75	80	71	39						26	41	38	34	31	27	26	29	48	46	20	35	58	62	67	71	78	85	92	88	83	79	80	81	82	84	86	88	90	91	93	77	61	45	37	30	22	26	29	33				4	7	11	17	24	30	34	39	43	40	38	35							9	18	27	25	24	22	25	27	30	10	20	30	42	54	66	56	47	37	7	12	16	15	13	12	8										6	11	17	42	67	92	63																	1	1	2	27	51	76	62	48	34	31	27	24	41	58	75	83	100	100	100	98	96	94	96	98	100	84	68	52	63	74	85	64	82	78	73	78	82	87	83	78	74	65	57	48	53	57	62	74	86	93	100	100	100	100	100	100	100	93	85	78	61	45	28	19	61	71	81	87	94	100	96	92	88	76	63	51	36	22	7	14	59	73	88	92	96	100	83	67	50	56	61	67	61	54	48	34
CAPE	0	0	0	0	0	0	0	0	0	0	10	0	0	0	0	0	0	0	0	50	20	80	320	170	100	230	240	190	50	0	0	0	0	0	50	130	170	100	50	20	10	10	0	60	0	0	0	0	10	20	30	50	70	90	100	110	100	70	50	10	10	20	20	10	10	10	10	10	10	10	10	10	0	0	0	0	0	0	0	0	0	10	10	10	10	10	10	0	0	0	0	0	0	0	0	10	20	20	20	10	0	0	0	0	0	0	0	0	0	0	10	10	20	10	10	10	10	10	10	10	0	0	0	0	0	0	0	0	0	0	10	20	30	50	50	40	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	20	60	140	250	350	440	530	540	430	240	100	40	10	20	40	70	110	160	220	290	360	460	560	600	510	360	220	130	10	10	20	20	20	30	40	50	70	100	130	140	110	70	30	20	20	10	10	20	20	30	30	20	20	30	50	70	90	100	100	80	0	10	10	10	10	20	30	50	90	180	300	350	290	170	80	40	10	30	50	70	80	90	100	100	100	90	80	70	70	70	60	40
Plafond (m)	1.5k	1.5k	1.6k	1.7k	1.8k	1.8k	1.8k	1.9k	2.0k	2.0k	1.9k	1.9k	1.9k	1.8k	1.8k	1.8k	1.8k	1.9k	2.0k	1.9k	2.0k	1.9k	1.9k	2.0k	2.2k	2.1k	2.0k	1.9k	1.9k	2.0k	1.9k	2.0k	1.9k	2.0k	2.0k	2.1k	2.3k	2.5k	2.7k	2.9k	2.9k	2.9k	2.7k	2.2k	1.9k	1.8k	1.6k	1.7k	1.9k	1.9k	1.8k	1.7k	1.6k	1.5k	1.5k	1.6k	1.6k	1.6k	1.5k	1.4k	1.4k	1.5k	1.5k	1.6k	1.7k	1.8k	2.1k	2.4k	2.6k	2.7k	2.7k	2.6k	2.3k	2.1k	2.1k	2.1k	2.1k	2.1k	2.2k	2.2k	2.3k	2.5k	2.6k	2.7k	2.8k	2.7k	2.6k	2.5k	2.4k	2.3k	2.3k	2.3k	2.3k	2.3k	2.3k	2.5k	2.6k	2.8k	2.9k	3.0k	3.0k	2.9k	2.8k	2.6k	1.9k	1.9k	1.9k	1.9k	2.0k	2.0k	2.2k	2.4k	2.7k	2.9k	2.7k	2.5k	2.3k	2.1k	2.0k	1.8k	2.1k	2.3k	2.5k	2.7k	2.9k	3.1k	3.1k	3.1k	3.1k	3.1k	3.1k	2.9k	2.6k	2.2k	1.9k	1.7k	1.5k	1.6k	1.8k	2.0k	2.3k	2.6k	2.9k	3.0k	3.2k	3.3k	3.4k	3.3k	2.9k	2.4k	2.1k	1.9k	1.6k	1.8k	2.0k	2.2k	2.5k	2.5k	2.3k	2.0k	1.8k	1.7k	1.6k	1.6k	1.5k	1.4k	1.4k	1.3k	1.3k	1.3k	1.4k	1.5k	1.6k	1.8k	1.7k	1.6k	1.5k	1.5k	1.5k	1.5k	1.5k	1.4k	1.4k	1.4k	1.4k	1.4k	1.4k	1.4k	1.6k	1.7k	1.9k	2.1k	2.3k	2.1k	1.9k	1.7k	1.6k	1.6k	1.6k	1.6k	1.4k	1.4k	1.4k	1.4k	1.4k	1.4k	1.4k	1.3k	1.4k	1.6k	1.9k	2.1k	2.2k	2.1k	2.0k	1.9k	1.7k	1.8k	1.9k	1.8k	1.6k	1.5k	1.7k	2.0k	2.3k	2.2k	2.0k	1.8k	1.7k	1.5k	1.5k	1.4k	1.6k	1.6k	1.7k	1.7k	1.7k	1.6k	1.7k	1.8k	1.9k	2.0k	2.1k	2.2k	2.0k	1.8k	1.7k	1.6k

The takeoff site is located in the Jura protection zone, with a beautiful launch meadow above Untergrenchenberg. This area is regularly used and offers good cross-country (XC) potential. The launch site is an ideal, moderately steep alpine meadow in a forest clearing. Region: Solothurn, Switzerland. The site record is 130.4 km. For more details, visit [DC Weissenstein](https://www.dcweissenstein.ch). The launch site is situated in a nature meadow just below the starting area, home to over a hundred rare plants. Please take care of this terrain and stick to the hiking trails. Landing in this area is strictly prohibited due to nature conservation. Visiting pilots are asked to pay a start fee at their discretion. Caution: Dangerous turbulence can occur in front of Bützen during north wind conditions, strong Bise, or west wind. Do not launch under these conditions. Instead, take the bus from Grenchenberg at the following times: - Sunday: 9:40, 11:40, 14:40, 16:40 - Saturday and Sunday: 11:40, 14:40, 16:40 - Wednesday: 14:40, 16:40 Bus connections from Grenchen, Bahnhof-Süd to Grenchenberg: - Wednesday: 12:55, 15:55 - Saturday: 10:55, 12:55, 15:55 - Sunday: 8:55, 10:55, 12:55, 15:55 For questions about the Bützen launch site, contact Stefan Siegenthaler at Tel. 032 645 36 88. Flying at Grenchenberg is a unique experience, with a 100-meter high and one-kilometer wide rock wall providing a breathtaking backdrop. The bus runs twice on Wednesdays and 3-4 times per day on weekends. For the schedule, visit [BGU](http://www.bgu.ch). Launch Site: - Orientation: SE - Difficulty: Easy - Altitude: 1300 m - No cable car available - Coordinates: 7.38978691, 47.22271832 - Hiking time: 10 minutes Drive to Untergrenchenberg, then walk east on the hiking trail to the launch site. Flying Area Grenchenberg Bützen: Flying at Grenchenberg offers a unique experience with its impressive rock wall. Flying Area Grenchenberg North: The north side of Grenchenberg is suitable for evening thermals and soaring flights during north wind conditions. The height differences of around 700 meters provide long-lasting flight enjoyment. Sustained updrafts allow for easy altitude gains and various route options. Difficulty: Avoid flying during north wind conditions, strong Bise, or west wind due to dangerous turbulence in front of Bützen. Restricted Zone on Grenchenberg North: The eastern areas of Montoz are inhabited by capercaillies. To protect this natural habitat, a total flight ban is in effect on the eastern side of the Buement launch site (Grenchenberg North) in June when the chicks hatch. Adhering to this rule ensures the chicks can search for food undisturbed and have a chance of survival. Compliance helps with nature conservation. For more information, visit [DC Weissenstein](https://www.dcweissenstein.ch).

Modifier

Optimal Wind Direction

Optimal Speed (kmh)

Modifier