Soaring Guidance
Issued by NWS Boise, ID
Issued by NWS Boise, ID
129
UXUS97 KBOI 151305
SRGBOI
Soaring Forecast
National Weather Service Boise, Idaho
705 AM MDT Tuesday, September 15, 2026
This forecast is for Tuesday, September 15, 2026:
If the trigger temperature of 67.1 F/19.5 C is reached...then
Thermal Soaring Index....................... Good
Maximum rate of lift........................ 489 ft/min (2.5 m/s)
Maximum height of thermals.................. 10623 ft MSL (7656 ft AGL)
Forecast maximum temperature................... 77.0 F/25.5 C
Time of trigger temperature.................... 1145 MDT
Time of overdevelopment........................ 1900 MDT
Middle/high clouds during soaring window....... None
Surface winds during soaring window............ 20 mph or less
Height of the -3 thermal index................. 8512 ft MSL (5545 ft AGL)
Thermal soaring outlook for Wednesday 09/16.... Good
Wave Soaring Index............................. Not available
Remarks...
Sunrise/Sunset.................... 07:24:42 / 19:55:14 MDT
Total possible sunshine........... 12 hr 30 min 31 sec (750 min 31 sec)
Altitude of sun at 13:39:58 MDT... 48.28 degrees
Upper air data from rawinsonde observation taken on 09/15/2026 at 0600 MDT
Freezing level.................. 12233 ft MSL (9266 ft AGL)
Convective condensation level... 16390 ft MSL (13423 ft AGL)
Lifted condensation level....... 13527 ft MSL (10561 ft AGL)
Lifted index.................... +4.3
K index......................... -5.4
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 -53.7 -64.7 255 38 19 0.4 0.2 M M M M M
38000 -52.7 -62.9 255 31 16 1.8 1.0 M M M M M
36000 -51.6 -60.9 255 23 12 1.8 1.0 M M M M M
34000 -48.6 -55.5 260 18 9 8.4 4.6 M M M M M
32000 -43.5 -46.3 275 16 8 8.4 4.6 M M M M M
30000 -38.5 -37.3 280 16 8 8.3 4.5 44.6 112.2 14.4 M M
28000 -33.6 -28.5 275 18 9 8.3 4.5 43.4 110.2 14.0 M M
26000 -28.9 -20.0 265 20 11 7.5 4.1 41.8 107.2 13.0 M M
24000 -24.5 -12.1 260 23 12 7.4 4.1 40.2 104.3 12.0 M M
22000 -19.6 -3.3 255 24 12 7.4 4.1 38.2 100.7 10.6 M M
20000 -15.2 4.6 255 22 11 7.3 4.0 36.4 97.5 9.4 M M
18000 -10.9 12.4 255 18 10 6.9 3.8 34.6 94.3 8.0 M M
16000 -7.0 19.4 255 14 7 6.5 3.6 32.4 90.3 6.3 M M
14000 -3.1 26.4 245 10 5 6.0 3.3 30.2 86.4 4.5 M M
12000 0.3 32.5 230 9 5 5.1 2.8 27.5 81.4 2.1 M M
10000 3.3 37.9 215 9 5 5.2 2.9 24.4 76.0 -0.7 448 2.3
9000 4.8 40.6 210 8 4 5.3 2.9 23.0 73.4 -2.1 372 1.9
8000 6.9 44.4 210 6 3 6.7 3.7 21.4 70.5 -3.8 275 1.4
7500 7.5 45.5 210 6 3 3.7 2.0 20.6 69.1 -4.6 240 1.2
7000 8.2 46.8 200 5 3 4.9 2.7 19.8 67.7 -5.4 204 1.0
6500 8.9 48.0 200 4 2 5.0 2.7 19.1 66.4 -6.2 169 0.9
6000 9.5 49.1 200 4 2 5.2 2.9 18.4 65.1 -7.1 136 0.7
5500 10.2 50.4 200 3 2 4.8 2.6 17.7 63.8 -7.9 101 0.5
5000 10.9 51.6 175 4 2 3.2 1.7 16.9 62.5 -8.7 66 0.3
4750 10.9 51.6 165 4 2 0.6 0.3 16.3 61.3 -9.4 57 0.3
4500 11.0 51.8 155 5 2 0.8 0.4 15.6 60.1 -10.1 48 0.2
4250 11.0 51.8 140 6 3 -0.7 -0.4 14.9 58.8 -10.9 40 0.2
4000 10.8 51.4 135 7 4 -4.9 -2.7 14.0 57.1 -11.8 38 0.2
3750 10.6 51.1 130 8 4 2.5 1.4 13.0 55.3 -12.8 38 0.2
3500 10.9 51.6 110 7 4 -3.2 -1.7 12.5 54.6 -13.3 21 0.1
3400 10.9 51.6 110 7 4 -3.2 -1.7 12.5 54.6 -13.3 21 0.1
3300 9.4 48.9 100 6 3 -40.2 -22.1 10.5 50.9 -15.3 60 0.3
3200 9.4 48.9 100 6 3 -40.2 -22.1 10.5 50.9 -15.3 60 0.3
3100 9.4 48.9 100 6 3 -40.2 -22.1 10.5 50.9 -15.3 60 0.3
3000 6.7 44.1 100 6 3 -6.0 -3.3 7.5 45.5 -18.3 131 0.7
2900 M M M M M M M M M M M M
* * * * * * Numerical weather prediction model forecast data valid * * * * * *
09/15/2026 at 0900 MDT | 09/15/2026 at 1200 MDT
|
CAPE... 0.0 LI... +8.4 | CAPE... 0.0 LI... +7.1
CINH... -0.1 K Index... -4.1 | CINH... 0.0 K Index... +0.4
|
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 -54.0 -65.2 250 40 21 0.2 0.1 | -53.8 -64.8 240 47 24 0.7 0.4
38000 -52.8 -63.0 250 35 18 2.1 1.2 | -52.6 -62.7 240 43 22 2.0 1.1
36000 -51.6 -60.9 245 30 15 2.1 1.2 | -51.4 -60.5 240 38 20 2.0 1.1
34000 -48.5 -55.3 245 24 12 8.2 4.5 | -48.4 -55.1 240 35 18 8.1 4.4
32000 -43.5 -46.3 245 19 10 8.2 4.5 | -43.6 -46.5 235 32 17 8.1 4.4
30000 -38.5 -37.3 245 16 8 8.5 4.7 | -38.7 -37.7 235 31 16 8.2 4.5
28000 -33.5 -28.3 245 17 9 8.5 4.6 | -33.8 -28.8 235 31 16 8.2 4.5
26000 -28.8 -19.8 245 20 10 7.4 4.1 | -29.3 -20.7 235 32 17 7.3 4.0
24000 -24.4 -11.9 245 24 12 6.9 3.8 | -24.9 -12.8 235 33 17 7.0 3.8
22000 -19.8 -3.6 245 25 13 7.0 3.8 | -20.3 -4.5 235 30 15 7.0 3.8
20000 -15.6 3.9 250 22 11 7.1 3.9 | -15.9 3.4 240 25 13 7.5 4.1
18000 -11.4 11.5 250 19 10 7.1 3.9 | -11.4 11.5 240 20 10 7.6 4.2
16000 -7.2 19.0 250 15 8 6.9 3.8 | -7.1 19.2 240 16 8 6.9 3.8
14000 -3.2 26.2 240 13 7 6.1 3.4 | -3.0 26.6 235 14 7 6.3 3.4
12000 0.2 32.4 225 13 7 5.0 2.8 | 0.4 32.7 225 13 7 5.2 2.8
10000 3.2 37.8 215 11 6 4.9 2.7 | 3.4 38.1 215 12 6 5.2 2.9
9000 4.6 40.3 210 10 5 5.2 2.8 | 4.9 40.8 205 11 6 5.7 3.1
8000 6.5 43.7 195 7 4 6.6 3.6 | 7.1 44.8 185 10 5 7.8 4.3
7500 7.2 45.0 190 7 3 3.5 1.9 | 7.7 45.9 175 10 5 3.0 1.6
7000 7.9 46.2 180 6 3 5.1 2.8 | 8.5 47.3 160 10 5 5.3 2.9
6500 8.6 47.5 170 5 3 4.7 2.6 | 9.4 48.9 150 10 5 5.4 3.0
6000 9.2 48.6 160 5 3 4.9 2.7 | 10.2 50.4 150 9 5 4.6 2.5
5500 9.8 49.6 150 6 3 4.3 2.4 | 10.8 51.4 145 8 4 5.7 3.1
5000 10.4 50.7 140 7 4 3.0 1.7 | 11.7 53.1 150 8 4 5.8 3.2
4750 10.5 50.9 150 9 4 1.9 1.0 | 12.1 53.8 155 8 4 7.0 3.9
4500 10.7 51.3 150 9 5 4.1 2.3 | 12.7 54.9 155 8 4 10.2 5.6
4250 11.0 51.8 145 9 5 2.1 1.1 | 13.5 56.3 155 7 4 10.3 5.6
4000 11.1 52.0 145 9 5 -1.1 -0.6 | 14.2 57.6 160 7 4 9.7 5.3
3750 11.0 51.8 140 9 5 -0.1 -0.0 | 15.0 59.0 160 7 4 9.6 5.2
3500 11.0 51.8 130 7 3 -1.2 -0.6 | 15.7 60.3 160 7 3 12.4 6.8
3400 11.0 51.8 130 7 3 -1.2 -0.6 | 15.7 60.3 160 7 3 12.4 6.8
3300 10.8 51.4 120 5 3 -5.0 -2.7 | 16.9 62.4 160 6 3 18.8 10.3
3200 10.8 51.4 120 5 3 -5.0 -2.7 | 16.9 62.4 160 6 3 18.8 10.3
3100 10.8 51.4 120 5 3 -5.0 -2.7 | 16.9 62.4 160 6 3 18.8 10.3
3000 10.5 50.9 115 4 2 -0.6 -0.3 | 18.3 64.9 165 7 3 15.3 8.4
2900 M M M M M M M | M M M M M M M
09/15/2026 at 1500 MDT | 09/15/2026 at 1800 MDT
|
CAPE... 0.0 LI... +5.9 | CAPE... 0.0 LI... +4.2
CINH... -0.0 K Index... +1.7 | CINH... 0.0 K Index... +3.6
|
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 -53.4 -64.1 240 55 28 0.7 0.4 | -52.6 -62.7 240 62 32 0.8 0.4
38000 -52.4 -62.3 240 51 26 1.7 0.9 | -51.8 -61.2 235 60 31 1.2 0.7
36000 -51.3 -60.3 235 46 24 1.7 1.0 | -51.1 -60.0 235 56 29 1.2 0.7
34000 -48.5 -55.3 235 44 23 8.0 4.4 | -48.6 -55.5 230 52 27 7.8 4.3
32000 -43.7 -46.7 235 44 23 8.0 4.4 | -43.9 -47.0 235 49 25 7.8 4.3
30000 -38.9 -38.0 235 44 23 8.1 4.4 | -39.2 -38.6 235 46 24 7.9 4.4
28000 -34.0 -29.2 235 43 22 8.1 4.4 | -34.4 -29.9 235 43 22 8.0 4.4
26000 -29.5 -21.1 235 40 21 7.4 4.1 | -29.8 -21.6 240 41 21 7.7 4.2
24000 -25.0 -13.0 235 37 19 7.1 3.9 | -24.8 -12.6 235 37 19 7.0 3.8
22000 -20.3 -4.5 235 32 17 7.1 3.9 | -20.6 -5.1 235 34 17 7.0 3.9
20000 -15.9 3.4 235 27 14 7.5 4.1 | -16.2 2.8 230 29 15 7.5 4.1
18000 -11.4 11.5 230 22 11 7.4 4.1 | -11.6 11.1 230 25 13 7.7 4.2
16000 -7.2 19.0 225 19 10 6.8 3.7 | -7.2 19.0 230 22 11 7.3 4.0
14000 -3.2 26.2 220 16 8 6.4 3.5 | -2.9 26.8 230 19 10 6.9 3.8
12000 0.5 32.9 220 13 7 5.9 3.3 | 1.1 34.0 225 16 8 6.8 3.7
10000 4.0 39.2 210 11 6 6.5 3.5 | 5.2 41.4 220 12 6 7.0 3.9
9000 5.9 42.6 210 9 5 7.1 3.9 | 7.2 45.0 215 9 4 7.5 4.1
8000 8.6 47.5 185 6 3 8.5 4.7 | 10.2 50.4 185 4 2 9.5 5.2
7500 9.6 49.3 175 6 3 5.5 3.0 | 11.2 52.2 165 3 2 6.2 3.4
7000 10.6 51.1 165 5 3 6.5 3.6 | 12.4 54.3 140 2 1 7.8 4.3
6500 11.8 53.2 165 5 2 8.9 4.9 | 13.7 56.7 105 1 0 8.9 4.9
6000 12.9 55.2 170 4 2 7.5 4.1 | 14.9 58.8 000 0 0 8.1 4.4
5500 14.1 57.4 170 4 2 9.9 5.4 | 16.2 61.2 340 1 1 9.5 5.2
5000 15.7 60.3 175 4 2 9.7 5.3 | 17.6 63.7 330 1 1 10.1 5.6
4750 16.4 61.5 175 4 2 9.5 5.2 | 18.4 65.1 320 2 1 10.4 5.7
4500 17.1 62.8 180 4 2 10.4 5.7 | 19.2 66.6 320 2 1 9.7 5.3
4250 17.9 64.2 180 3 2 10.4 5.7 | 19.9 67.8 320 2 1 9.6 5.3
4000 18.7 65.7 185 3 2 10.3 5.6 | 20.6 69.1 315 2 1 9.6 5.3
3750 19.4 66.9 185 3 2 9.9 5.4 | 21.3 70.3 310 2 1 9.3 5.1
3500 20.2 68.4 190 3 2 11.3 6.2 | 21.9 71.4 310 2 1 8.7 4.8
3400 20.2 68.4 190 3 2 11.3 6.2 | 21.9 71.4 310 2 1 8.7 4.8
3300 21.2 70.2 190 3 2 17.6 9.7 | 22.6 72.7 315 2 1 9.9 5.4
3200 21.2 70.2 190 3 2 17.6 9.7 | 22.6 72.7 315 2 1 9.9 5.4
3100 21.2 70.2 190 3 2 17.6 9.7 | 22.6 72.7 315 2 1 9.9 5.4
3000 22.9 73.2 190 3 2 25.8 14.2 | 23.5 74.3 305 2 1 16.3 8.9
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