583
UXUS97 KBOI 221305
SRGBOI
SOARING FORECAST
NATIONAL WEATHER SERVICE BOISE, IDAHO
705 AM MDT TUESDAY, SEPTEMBER 22, 2026
THIS FORECAST IS FOR TUESDAY, SEPTEMBER 22, 2026:
IF THE TRIGGER TEMPERATURE OF 77.3 F/25.2 C IS REACHED...THEN
THERMAL SOARING INDEX....................... GOOD
MAXIMUM RATE OF LIFT........................ 636 FT/MIN (3.2 M/S)
MAXIMUM HEIGHT OF THERMALS.................. 11302 FT MSL (8335 FT AGL)
FORECAST MAXIMUM TEMPERATURE................... 83.0 F/28.8 C
TIME OF TRIGGER TEMPERATURE.................... 1245 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................. 6994 FT MSL (4028 FT AGL)
THERMAL SOARING OUTLOOK FOR WEDNESDAY 09/23.... GOOD
WAVE SOARING INDEX............................. NOT AVAILABLE
REMARKS...
SUNRISE/SUNSET.................... 07:32:34 / 19:42:24 MDT
TOTAL POSSIBLE SUNSHINE........... 12 HR 9 MIN 50 SEC (729 MIN 50 SEC)
ALTITUDE OF SUN AT 13:37:29 MDT... 45.72 DEGREES
UPPER AIR DATA FROM RAWINSONDE OBSERVATION TAKEN ON 09/22/2026 AT 0600 MDT
FREEZING LEVEL.................. 12827 FT MSL (9860 FT AGL)
CONVECTIVE CONDENSATION LEVEL... 13604 FT MSL (10637 FT AGL)
LIFTED CONDENSATION LEVEL....... 13154 FT MSL (10187 FT AGL)
LIFTED INDEX.................... -0.8
K INDEX......................... +22.8
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 -52.7 -62.9 215 13 7 1.9 1.0 M M M M M
38000 -52.3 -62.1 215 14 7 0.4 0.2 M M M M M
36000 -52.0 -61.6 210 17 9 0.5 0.2 M M M M M
34000 -49.4 -56.9 210 20 10 8.0 4.4 M M M M M
32000 -44.6 -48.3 215 21 11 8.0 4.4 M M M M M
30000 -39.6 -39.3 215 21 11 8.8 4.8 42.6 108.6 10.5 M M
28000 -34.4 -29.9 215 18 9 8.8 4.8 41.9 107.4 10.2 M M
26000 -29.4 -20.9 220 16 8 8.1 4.5 40.7 105.2 9.5 M M
24000 -24.6 -12.3 225 14 7 7.2 3.9 39.5 103.1 8.8 M M
22000 -19.7 -3.5 230 8 4 7.3 4.0 37.4 99.3 7.3 M M
20000 -15.3 4.5 235 7 3 7.4 4.1 35.7 96.2 6.0 M M
18000 -11.3 11.7 230 7 4 6.2 3.4 33.6 92.5 4.4 M M
16000 -7.5 18.5 225 8 4 7.0 3.8 31.3 88.4 2.4 M M
14000 -3.2 26.2 205 9 5 8.9 4.9 29.9 85.8 0.9 M M
12000 2.1 35.8 180 9 5 8.6 4.7 29.4 84.9 0.3 M M
10000 6.8 44.2 170 6 3 7.7 4.2 28.2 82.8 -0.8 515 2.6
9000 9.1 48.4 160 5 2 7.6 4.1 27.6 81.7 -1.4 418 2.1
8000 12.1 53.8 160 5 2 9.0 4.9 26.9 80.5 -2.1 292 1.5
7500 13.0 55.4 165 3 2 5.7 3.1 26.4 79.5 -2.7 250 1.3
7000 14.1 57.4 175 3 1 7.0 3.9 26.0 78.9 -3.1 203 1.0
6500 15.2 59.4 185 2 1 8.6 4.7 25.8 78.4 -3.4 152 0.8
6000 16.4 61.5 200 1 1 8.1 4.5 25.5 77.9 -3.7 103 0.5
5500 17.4 63.3 220 2 1 5.5 3.0 25.1 77.2 -4.2 58 0.3
5000 18.2 64.8 180 2 1 4.3 2.4 24.4 76.0 -4.8 20 0.1
4750 18.3 64.9 185 2 1 1.8 1.0 23.9 75.0 -5.4 8 0.0
4500 18.4 65.1 175 2 1 1.9 1.0 23.3 73.9 -6.1 M M
4250 18.6 65.5 145 2 1 1.1 0.6 22.7 72.9 -6.7 M M
4000 18.5 65.3 130 2 1 -3.5 -1.9 21.9 71.4 -7.5 M M
3750 18.2 64.8 130 3 1 -4.3 -2.3 20.8 69.4 -8.6 M M
3500 17.9 64.2 085 3 2 -3.9 -2.2 19.8 67.7 -9.6 M M
3400 17.9 64.2 085 3 2 -3.9 -2.2 19.8 67.7 -9.6 M M
3300 17.1 62.8 060 5 2 -24.6 -13.5 18.3 65.0 -11.0 1 0.0
3200 17.1 62.8 060 5 2 -24.6 -13.5 18.3 65.0 -11.0 1 0.0
3100 17.1 62.8 060 5 2 -24.6 -13.5 18.3 65.0 -11.0 1 0.0
3000 13.3 55.9 075 4 2 -91.1 -50.0 14.2 57.5 -15.1 108 0.6
2900 M M M M M M M M M M M M
* * * * * * NUMERICAL WEATHER PREDICTION MODEL FORECAST DATA VALID * * * * * *
09/22/2026 AT 0900 MDT | 09/22/2026 AT 1200 MDT
|
CAPE... 0.0 LI... +0.5 | CAPE... +5.3 LI... +0.3
CINH... 0.0 K INDEX... +24.2 | CINH... -92.5 K INDEX... +25.3
|
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 -52.4 -62.3 220 17 9 1.5 0.8 | -52.4 -62.3 225 20 10 1.7 0.9
38000 -52.0 -61.6 215 18 9 0.4 0.2 | -51.8 -61.2 220 20 10 0.6 0.4
36000 -51.7 -61.1 205 21 11 0.4 0.2 | -51.4 -60.5 215 21 11 0.7 0.4
34000 -49.4 -56.9 200 22 11 7.7 4.2 | -49.0 -56.2 215 21 11 7.4 4.0
32000 -44.8 -48.6 205 20 10 7.7 4.2 | -44.6 -48.3 215 19 10 7.4 4.0
30000 -39.9 -39.8 210 18 9 8.7 4.8 | -39.8 -39.6 220 17 9 8.7 4.8
28000 -34.7 -30.5 220 15 8 8.7 4.7 | -34.7 -30.5 220 15 8 8.7 4.7
26000 -29.9 -21.8 220 11 6 7.9 4.3 | -29.8 -21.6 225 11 6 8.0 4.4
24000 -25.2 -13.4 225 8 4 7.2 4.0 | -25.1 -13.2 225 8 4 6.9 3.8
22000 -20.3 -4.5 220 4 2 7.3 4.0 | -20.4 -4.7 220 5 3 7.0 3.8
20000 -15.8 3.6 215 5 2 7.6 4.2 | -16.0 3.2 230 6 3 7.4 4.1
18000 -11.6 11.1 210 7 4 6.4 3.5 | -11.9 10.6 230 8 4 6.5 3.5
16000 -7.7 18.1 200 9 5 7.1 3.9 | -8.0 17.6 210 9 5 7.3 4.0
14000 -3.2 26.2 190 10 5 8.6 4.7 | -3.4 25.9 195 9 5 8.9 4.9
12000 1.8 35.2 180 8 4 7.9 4.3 | 1.5 34.7 180 5 3 7.8 4.3
10000 6.2 43.2 160 3 1 7.5 4.1 | 6.1 43.0 125 4 2 7.9 4.4
9000 8.4 47.1 135 2 1 7.5 4.1 | 8.4 47.1 105 3 2 7.8 4.3
8000 11.3 52.3 000 0 0 8.5 4.7 | 11.4 52.5 070 3 2 8.6 4.7
7500 12.2 54.0 005 1 0 5.7 3.1 | 12.3 54.1 060 3 1 6.0 3.3
7000 13.2 55.8 330 2 1 7.2 4.0 | 13.4 56.1 035 3 1 7.4 4.1
6500 14.3 57.7 315 2 1 7.1 3.9 | 14.5 58.1 010 2 1 6.7 3.7
6000 15.3 59.5 300 2 1 6.5 3.6 | 15.4 59.7 355 1 1 6.2 3.4
5500 15.8 60.4 285 2 1 2.6 1.4 | 16.1 61.0 320 1 0 4.3 2.4
5000 16.3 61.3 245 2 1 3.0 1.6 | 16.8 62.2 245 2 1 2.8 1.6
4750 16.5 61.7 235 2 1 2.3 1.3 | 17.0 62.6 245 2 1 4.6 2.5
4500 16.6 61.9 230 1 1 2.0 1.1 | 17.5 63.5 245 2 1 10.1 5.5
4250 16.7 62.1 215 1 0 0.6 0.3 | 18.3 64.9 245 2 1 9.7 5.3
4000 16.6 61.9 170 1 0 -4.6 -2.5 | 18.9 66.0 245 3 1 7.4 4.1
3750 16.2 61.2 145 1 1 -1.2 -0.7 | 19.5 67.1 250 3 1 8.5 4.7
3500 16.4 61.5 085 1 1 2.6 1.4 | 20.2 68.4 250 3 1 12.1 6.7
3400 16.4 61.5 085 1 1 2.6 1.4 | 20.2 68.4 250 3 1 12.1 6.7
3300 16.2 61.2 070 2 1 -10.9 -6.0 | 21.2 70.2 250 3 1 13.9 7.6
3200 16.2 61.2 070 2 1 -10.9 -6.0 | 21.2 70.2 250 3 1 13.9 7.6
3100 16.2 61.2 070 2 1 -10.9 -6.0 | 21.2 70.2 250 3 1 13.9 7.6
3000 15.1 59.2 100 2 1 -16.2 -8.9 | 22.5 72.5 245 3 2 25.4 13.9
2900 M M M M M M M | M M M M M M M
09/22/2026 AT 1500 MDT | 09/22/2026 AT 1800 MDT
|
CAPE... +105.1 LI... -0.7 | CAPE... +66.7 LI... -0.7
CINH... -57.5 K INDEX... +27.9 | CINH... -42.6 K INDEX... +26.5
|
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 -65.2 225 27 14 1.0 0.5 | -54.9 -66.8 235 25 13 0.5 0.3
38000 -52.8 -63.0 230 22 11 2.2 1.2 | -53.4 -64.1 245 21 11 3.0 1.6
36000 -51.3 -60.3 240 16 8 2.2 1.2 | -51.6 -60.9 250 18 9 3.0 1.6
34000 -48.5 -55.3 240 15 8 7.2 3.9 | -48.3 -54.9 255 16 8 7.2 4.0
32000 -44.2 -47.6 225 17 9 7.2 4.0 | -44.0 -47.2 245 16 8 7.3 4.0
30000 -39.4 -38.9 220 18 9 8.6 4.7 | -39.4 -38.9 240 16 8 8.1 4.4
28000 -34.3 -29.7 225 17 9 8.6 4.7 | -34.6 -30.3 240 15 8 8.1 4.4
26000 -29.4 -20.9 230 13 7 8.0 4.4 | -29.8 -21.6 240 13 7 7.9 4.3
24000 -24.7 -12.5 230 9 4 6.5 3.6 | -25.1 -13.2 245 11 6 7.2 3.9
22000 -20.2 -4.4 250 6 3 6.7 3.7 | -20.8 -5.4 245 8 4 7.3 4.0
20000 -16.0 3.2 260 7 3 7.3 4.0 | -16.0 3.2 255 7 3 7.2 3.9
18000 -12.0 10.4 250 8 4 6.2 3.4 | -11.8 10.8 255 8 4 7.2 4.0
16000 -8.2 17.2 220 8 4 7.0 3.9 | -7.7 18.1 240 8 4 7.0 3.9
14000 -3.6 25.5 195 6 3 9.0 4.9 | -3.4 25.9 225 8 4 8.6 4.7
12000 1.3 34.3 165 4 2 8.3 4.5 | 1.5 34.7 215 5 2 8.1 4.4
10000 6.2 43.2 135 4 2 8.3 4.6 | 6.5 43.7 205 3 1 8.4 4.6
9000 8.7 47.7 135 3 2 8.2 4.5 | 8.9 48.0 245 2 1 8.2 4.5
8000 11.8 53.2 000 0 0 8.9 4.9 | 12.2 54.0 295 5 2 9.1 5.0
7500 12.9 55.2 275 1 1 6.6 3.6 | 13.2 55.8 295 5 3 7.2 4.0
7000 14.0 57.2 290 2 1 7.3 4.0 | 14.5 58.1 295 6 3 8.6 4.7
6500 15.2 59.4 280 3 2 9.3 5.1 | 15.9 60.6 295 6 3 9.8 5.4
6000 16.5 61.7 280 4 2 7.9 4.3 | 17.3 63.1 295 6 3 9.4 5.1
5500 17.7 63.9 280 4 2 10.3 5.6 | 18.7 65.7 295 7 3 10.3 5.7
5000 19.3 66.7 280 5 2 9.4 5.2 | 20.3 68.5 290 7 3 9.2 5.1
4750 19.9 67.8 280 5 3 9.2 5.0 | 20.9 69.6 290 7 4 8.8 4.8
4500 20.7 69.3 280 5 3 10.8 5.9 | 21.6 70.9 290 7 3 10.2 5.6
4250 21.5 70.7 280 5 3 10.5 5.8 | 22.4 72.3 290 7 3 10.0 5.5
4000 22.3 72.1 275 5 3 9.4 5.2 | 23.1 73.6 290 7 3 9.4 5.2
3750 22.9 73.2 280 5 3 9.4 5.2 | 23.8 74.8 290 7 4 9.3 5.1
3500 23.7 74.7 280 5 3 10.6 5.8 | 24.5 76.1 290 6 3 9.6 5.3
3400 23.7 74.7 280 5 3 10.6 5.8 | 24.5 76.1 290 6 3 9.6 5.3
3300 24.6 76.3 275 5 2 14.9 8.2 | 25.2 77.4 290 6 3 9.8 5.4
3200 24.6 76.3 275 5 2 14.9 8.2 | 25.2 77.4 290 6 3 9.8 5.4
3100 24.6 76.3 275 5 2 14.9 8.2 | 25.2 77.4 290 6 3 9.8 5.4
3000 26.3 79.3 280 5 3 35.9 19.7 | 26.1 79.0 290 6 3 14.7 8.1
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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page