Soaring Guidance
Issued by NWS Boise, ID
Issued by NWS Boise, ID
102
UXUS97 KBOI 201305
SRGBOI
Soaring Forecast
National Weather Service Boise, Idaho
705 AM MDT Sunday, September 20, 2026
This forecast is for Sunday, September 20, 2026:
If the trigger temperature of 70.6 F/21.4 C is reached...then
Thermal Soaring Index....................... Good
Maximum rate of lift........................ 616 ft/min (3.1 m/s)
Maximum height of thermals.................. 11622 ft MSL (8655 ft AGL)
Forecast maximum temperature................... 80.0 F/27.1 C
Time of trigger temperature.................... 1130 MDT
Time of overdevelopment........................ None
Middle/high clouds during soaring window....... None
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 9409 ft MSL (6443 ft AGL)
Thermal soaring outlook for Monday 09/21....... Good
Wave Soaring Index............................. Not available
Remarks...
Sunrise/Sunset.................... 07:30:18 / 19:46:04 MDT
Total possible sunshine........... 12 hr 15 min 45 sec (735 min 45 sec)
Altitude of sun at 13:38:11 MDT... 46.46 degrees
Upper air data from rawinsonde observation taken on 09/20/2026 at 0600 MDT
Freezing level.................. 12508 ft MSL (9541 ft AGL)
Convective condensation level... 10248 ft MSL (7281 ft AGL)
Lifted condensation level....... 10941 ft MSL (7974 ft AGL)
Lifted index.................... -0.5
K index......................... +24.0
Height Temperature Wind Wind Spd Lapse Rate ConvectionT Thermal Lift Rate
ft MSL deg C deg F Dir kt m/s C/km F/kft deg C deg F Index fpm m/s
--------------------------------------------------------------------------------
40000 -54.6 -66.3 295 28 15 0.1 0.1 M M M M M
38000 -53.0 -63.4 295 30 15 3.0 1.6 M M M M M
36000 -51.2 -60.2 295 31 16 3.0 1.6 M M M M M
34000 -47.4 -53.3 295 33 17 7.8 4.3 M M M M M
32000 -42.7 -44.9 295 34 17 7.8 4.3 M M M M M
30000 -37.9 -36.2 295 32 17 8.4 4.6 44.7 112.5 13.3 M M
28000 -32.9 -27.2 300 29 15 8.4 4.6 43.7 110.7 12.9 M M
26000 -27.9 -18.2 305 27 14 8.2 4.5 42.5 108.5 12.3 M M
24000 -23.0 -9.4 310 24 13 7.8 4.3 41.3 106.4 11.6 M M
22000 -18.4 -1.1 315 21 11 7.8 4.3 39.9 103.7 10.7 M M
20000 -13.4 7.9 320 16 8 7.3 4.0 37.9 100.2 9.3 M M
18000 -9.0 15.8 325 13 7 7.3 4.0 36.3 97.3 8.1 M M
16000 -5.3 22.5 330 11 6 5.6 3.1 33.9 93.1 6.2 M M
14000 -2.3 27.9 345 9 5 5.6 3.0 31.0 87.8 3.5 M M
12000 0.7 33.3 345 8 4 5.2 2.8 28.2 82.7 0.6 M M
10000 3.7 38.7 350 5 3 6.3 3.4 25.3 77.6 -2.2 498 2.5
9000 5.5 41.9 350 5 3 6.9 3.8 24.3 75.7 -3.3 415 2.1
8000 8.3 46.9 345 5 3 9.5 5.2 23.5 74.3 -4.2 294 1.5
7500 9.2 48.6 345 5 2 5.3 2.9 23.0 73.3 -4.7 251 1.3
7000 10.4 50.7 340 5 3 7.5 4.1 22.7 72.8 -5.1 202 1.0
6500 11.5 52.7 340 5 3 7.6 4.2 22.3 72.2 -5.5 155 0.8
6000 12.6 54.7 335 5 2 6.9 3.8 22.0 71.6 -5.8 106 0.5
5500 13.4 56.1 325 3 2 5.0 2.8 21.4 70.5 -6.5 68 0.3
5000 14.0 57.2 255 1 1 3.7 2.0 20.6 69.0 -7.3 33 0.2
4750 14.3 57.7 210 2 1 2.7 1.5 20.1 68.1 -7.9 19 0.1
4500 14.4 57.9 175 3 1 1.6 0.9 19.5 67.1 -8.4 6 0.0
4250 14.5 58.1 155 4 2 0.8 0.4 18.8 65.9 -9.1 M M
4000 14.5 58.1 145 5 2 -1.9 -1.1 18.1 64.6 -9.8 M M
3750 14.5 58.1 140 6 3 5.4 2.9 17.3 63.2 -10.6 M M
3500 14.9 58.8 105 4 2 -3.3 -1.8 17.0 62.7 -10.9 M M
3400 14.9 58.8 105 4 2 -3.3 -1.8 17.0 62.7 -10.9 M M
3300 13.4 56.1 100 5 2 -38.0 -20.9 15.1 59.1 -12.8 0 0.0
3200 13.4 56.1 100 5 2 -38.0 -20.9 15.1 59.1 -12.8 0 0.0
3100 13.4 56.1 100 5 2 -38.0 -20.9 15.1 59.1 -12.8 0 0.0
3000 11.9 53.4 095 5 3 29.8 16.3 13.1 55.6 -14.8 38 0.2
2900 M M M M M M M M M M M M
* * * * * * Numerical weather prediction model forecast data valid * * * * * *
09/20/2026 at 0900 MDT | 09/20/2026 at 1200 MDT
|
CAPE... 0.0 LI... +2.1 | CAPE... 0.0 LI... +2.3
CINH... 0.0 K Index... +21.1 | CINH... -0.2 K Index... +20.8
|
Height Temperature Wnd WndSpd Lapse Rate | Temperature Wnd WndSpd Lapse Rate
ft MSL deg C deg F Dir kt m/s C/km F/kft | deg C deg F Dir kt m/s C/km F/kft
--------------------------------------------------------------------------------
40000 -54.6 -66.3 305 21 11 0.5 0.3 | -54.0 -65.2 320 16 8 1.3 0.7
38000 -52.7 -62.9 305 22 11 3.4 1.9 | -52.1 -61.8 310 17 9 3.5 1.9
36000 -50.5 -58.9 300 24 12 3.4 1.8 | -49.7 -57.5 300 19 10 3.5 1.9
34000 -47.1 -52.8 295 27 14 7.0 3.8 | -46.3 -51.3 295 22 11 6.9 3.8
32000 -42.9 -45.2 290 32 17 7.0 3.8 | -42.2 -44.0 290 25 13 6.9 3.8
30000 -38.2 -36.8 290 32 16 8.3 4.6 | -37.9 -36.2 290 27 14 7.5 4.1
28000 -33.2 -27.8 295 28 14 8.3 4.6 | -33.4 -28.1 290 27 14 7.4 4.1
26000 -28.2 -18.8 300 24 13 8.5 4.7 | -28.4 -19.1 290 23 12 8.5 4.7
24000 -23.1 -9.6 305 21 11 8.0 4.4 | -23.4 -10.1 300 18 10 8.2 4.5
22000 -17.7 0.1 310 18 9 8.0 4.4 | -17.9 -0.2 305 16 8 8.2 4.5
20000 -13.4 7.9 315 15 8 7.2 4.0 | -13.4 7.9 315 12 6 7.3 4.0
18000 -9.1 15.6 320 12 6 7.1 3.9 | -9.2 15.4 330 10 5 6.9 3.8
16000 -5.1 22.8 335 11 5 6.3 3.5 | -5.3 22.5 355 9 4 6.5 3.6
14000 -2.0 28.4 355 8 4 5.4 3.0 | -1.9 28.6 020 7 4 5.5 3.0
12000 1.0 33.8 010 8 4 5.4 2.9 | 1.3 34.3 050 6 3 5.6 3.1
10000 3.9 39.0 025 6 3 6.2 3.4 | 4.3 39.7 075 5 2 6.1 3.4
9000 5.7 42.3 025 6 3 6.9 3.8 | 6.1 43.0 080 4 2 7.0 3.8
8000 8.2 46.8 020 5 3 6.4 3.5 | 8.6 47.5 080 3 2 6.6 3.6
7500 9.4 48.9 015 5 3 8.7 4.8 | 9.8 49.6 070 3 2 8.2 4.5
7000 10.3 50.5 015 5 3 6.6 3.6 | 10.7 51.3 065 2 1 6.2 3.4
6500 11.3 52.3 010 5 3 7.2 4.0 | 11.6 52.9 060 2 1 6.7 3.7
6000 12.4 54.3 010 4 2 6.1 3.3 | 12.6 54.7 000 0 0 5.0 2.7
5500 13.0 55.4 025 2 1 3.6 2.0 | 13.1 55.6 175 2 1 5.2 2.8
5000 13.4 56.1 110 2 1 2.3 1.2 | 14.0 57.2 190 4 2 5.9 3.2
4750 13.6 56.5 140 3 1 1.7 0.9 | 14.4 57.9 195 4 2 7.0 3.9
4500 13.7 56.7 140 4 2 1.1 0.6 | 15.1 59.2 195 4 2 9.1 5.0
4250 13.8 56.8 135 4 2 1.9 1.0 | 15.8 60.4 195 4 2 9.9 5.4
4000 14.0 57.2 135 5 3 1.9 1.1 | 16.5 61.7 200 4 2 10.4 5.7
3750 14.2 57.6 135 5 3 3.6 2.0 | 17.3 63.1 200 4 2 9.3 5.1
3500 14.4 57.9 120 4 2 2.9 1.6 | 18.0 64.4 200 4 2 12.1 6.6
3400 14.4 57.9 120 4 2 2.9 1.6 | 18.0 64.4 200 4 2 12.1 6.6
3300 14.4 57.9 115 4 2 -3.8 -2.1 | 19.2 66.6 200 4 2 19.5 10.7
3200 14.4 57.9 115 4 2 -3.8 -2.1 | 19.2 66.6 200 4 2 19.5 10.7
3100 14.4 57.9 115 4 2 -3.8 -2.1 | 19.2 66.6 200 4 2 19.5 10.7
3000 14.4 57.9 110 3 2 9.7 5.3 | 20.4 68.7 200 4 2 5.5 3.0
2900 M M M M M M M | M M M M M M M
09/20/2026 at 1500 MDT | 09/20/2026 at 1800 MDT
|
CAPE... +20.4 LI... +1.1 | CAPE... +26.4 LI... +0.9
CINH... -57.3 K Index... +19.5 | CINH... -64.6 K Index... +17.4
|
Height Temperature Wnd WndSpd Lapse Rate | Temperature Wnd WndSpd Lapse Rate
ft MSL deg C deg F Dir kt m/s C/km F/kft | deg C deg F Dir kt m/s C/km F/kft
--------------------------------------------------------------------------------
40000 -53.8 -64.8 345 15 8 2.0 1.1 | -54.1 -65.4 360 16 8 2.7 1.5
38000 -51.6 -60.9 330 16 8 3.8 2.1 | -51.4 -60.5 350 15 8 4.6 2.5
36000 -49.0 -56.2 315 18 9 3.8 2.1 | -48.3 -54.9 335 15 8 4.6 2.5
34000 -45.5 -49.9 305 19 10 6.9 3.8 | -44.7 -48.5 325 15 8 6.8 3.8
32000 -41.3 -42.3 300 21 11 6.9 3.8 | -40.6 -41.1 320 16 8 6.8 3.8
30000 -37.2 -35.0 295 22 11 6.9 3.8 | -36.4 -33.5 310 16 8 7.0 3.8
28000 -33.1 -27.6 295 23 12 6.8 3.7 | -32.3 -26.1 305 16 8 7.0 3.8
26000 -28.5 -19.3 295 20 10 7.9 4.3 | -28.1 -18.6 300 16 8 7.0 3.8
24000 -23.7 -10.7 295 16 8 8.2 4.5 | -23.7 -10.7 300 15 8 8.3 4.5
22000 -18.2 -0.8 305 13 6 8.2 4.5 | -18.2 -0.8 305 11 6 8.3 4.5
20000 -13.7 7.3 320 9 4 7.5 4.1 | -13.6 7.5 325 7 3 7.5 4.1
18000 -9.3 15.3 350 6 3 7.3 4.0 | -9.1 15.6 360 4 2 7.5 4.1
16000 -5.1 22.8 020 5 3 6.8 3.8 | -4.8 23.4 030 3 2 7.0 3.8
14000 -1.6 29.1 055 4 2 5.5 3.0 | -1.2 29.8 070 3 1 5.5 3.0
12000 1.8 35.2 095 5 3 6.6 3.6 | 2.3 36.1 115 4 2 7.7 4.2
10000 5.5 41.9 105 5 3 6.3 3.4 | 6.6 43.9 115 6 3 7.0 3.9
9000 7.3 45.1 110 4 2 6.4 3.5 | 8.6 47.5 110 5 3 6.7 3.7
8000 9.8 49.6 130 3 1 6.6 3.6 | 11.2 52.2 095 3 2 6.9 3.8
7500 10.7 51.3 145 2 1 7.5 4.1 | 12.0 53.6 090 2 1 7.3 4.0
7000 11.8 53.2 170 1 1 7.0 3.9 | 13.1 55.6 090 1 1 7.1 3.9
6500 12.9 55.2 195 1 1 9.3 5.1 | 14.4 57.9 085 1 1 10.7 5.9
6000 14.3 57.7 210 1 1 8.6 4.7 | 15.9 60.6 085 1 0 9.4 5.1
5500 15.6 60.1 215 2 1 11.2 6.1 | 17.3 63.1 000 0 0 10.4 5.7
5000 17.2 63.0 225 2 1 9.7 5.3 | 18.8 65.8 000 0 0 10.6 5.8
4750 17.9 64.2 225 2 1 9.8 5.4 | 19.6 67.3 250 1 0 9.9 5.4
4500 18.7 65.7 230 2 1 10.4 5.7 | 20.3 68.5 250 1 0 8.8 4.8
4250 19.5 67.1 230 2 1 10.2 5.6 | 21.0 69.8 250 1 0 9.6 5.2
4000 20.2 68.4 230 2 1 10.6 5.8 | 21.7 71.1 250 1 0 10.7 5.8
3750 21.0 69.8 235 2 1 9.2 5.0 | 22.5 72.5 250 1 1 9.3 5.1
3500 21.7 71.1 230 2 1 12.4 6.8 | 23.1 73.6 250 1 0 9.1 5.0
3400 21.7 71.1 230 2 1 12.4 6.8 | 23.1 73.6 250 1 0 9.1 5.0
3300 23.0 73.4 235 2 1 22.1 12.1 | 23.9 75.0 255 1 1 12.0 6.6
3200 23.0 73.4 235 2 1 22.1 12.1 | 23.9 75.0 255 1 1 12.0 6.6
3100 23.0 73.4 235 2 1 22.1 12.1 | 23.9 75.0 255 1 1 12.0 6.6
3000 24.3 75.7 240 2 1 3.9 2.1 | 24.7 76.5 260 1 1 7.2 4.0
2900 M M M M M M M | M M M M M M M
________________________________________________________________________________
This product is issued twice per day, once by approximately 0630 MST/0730 MDT
(1330 UTC) and again by approximately 1830 MST/1930 MDT (0130 UTC). It is not
continuously monitored nor updated after its initial issuance.
The information contained herein is based on rawinsonde observation and/or
numerical weather prediction model data taken at the Boise Airport site in
Boise, Idaho at
Latitude: 43.56774
Longitude: -116.21089
Elevation: 2867 feet (874 meters)
and may not be representative of other areas in eastern Oregon or southwest
Idaho. Note that some elevations in numerical weather prediction models differ
from actual station elevations, which can lead to data which appear to be below
ground. Erroneous data such as these should not be used.
The content and format of this report as well as the issuance times are subject
to change without prior notice.
082025