077
UXUS97 KBOI 211305
SRGBOI
SOARING FORECAST
NATIONAL WEATHER SERVICE BOISE, IDAHO
705 AM MDT MONDAY, SEPTEMBER 21, 2026
THIS FORECAST IS FOR MONDAY, SEPTEMBER 21, 2026:
IF THE TRIGGER TEMPERATURE OF 74.9 F/23.8 C IS REACHED...THEN
THERMAL SOARING INDEX....................... GOOD
MAXIMUM RATE OF LIFT........................ 779 FT/MIN (4.0 M/S)
MAXIMUM HEIGHT OF THERMALS.................. 13075 FT MSL (10108 FT AGL)
FORECAST MAXIMUM TEMPERATURE................... 85.0 F/29.9 C
TIME OF TRIGGER TEMPERATURE.................... 1230 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................. 9910 FT MSL (6943 FT AGL)
THERMAL SOARING OUTLOOK FOR TUESDAY 09/22...... GOOD
WAVE SOARING INDEX............................. NOT AVAILABLE
REMARKS...
SUNRISE/SUNSET.................... 07:31:26 / 19:44:14 MDT
TOTAL POSSIBLE SUNSHINE........... 12 HR 12 MIN 48 SEC (732 MIN 48 SEC)
ALTITUDE OF SUN AT 13:37:50 MDT... 46.09 DEGREES
UPPER AIR DATA FROM RAWINSONDE OBSERVATION TAKEN ON 09/21/2026 AT 0600 MDT
FREEZING LEVEL.................. 12890 FT MSL (9923 FT AGL)
CONVECTIVE CONDENSATION LEVEL... 13888 FT MSL (10921 FT AGL)
LIFTED CONDENSATION LEVEL....... 13297 FT MSL (10330 FT AGL)
LIFTED INDEX.................... -0.7
K INDEX......................... +15.5
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 -55.1 -67.2 190 10 5 4.0 2.2 M M M M M
38000 -51.9 -61.4 210 5 3 5.3 2.9 M M M M M
36000 -48.7 -55.7 280 3 2 5.3 2.9 M M M M M
34000 -44.4 -47.9 305 4 2 8.1 4.4 M M M M M
32000 -39.6 -39.3 300 3 1 8.1 4.4 M M M M M
30000 -35.0 -31.0 290 4 2 7.2 3.9 48.7 119.6 14.2 M M
28000 -30.7 -23.3 280 6 3 7.2 3.9 46.7 116.1 13.1 M M
26000 -26.1 -15.0 275 7 4 6.6 3.6 44.0 111.2 11.3 M M
24000 -22.3 -8.1 265 7 4 6.2 3.4 41.6 106.8 9.7 M M
22000 -18.5 -1.3 250 5 3 6.1 3.3 38.9 102.1 7.7 M M
20000 -14.3 6.3 215 3 2 7.2 4.0 36.9 98.5 6.2 M M
18000 -9.7 14.5 155 4 2 8.0 4.4 35.5 95.9 5.1 M M
16000 -5.2 22.6 115 6 3 7.1 3.9 34.0 93.2 3.9 M M
14000 -1.7 28.9 125 8 4 4.1 2.2 31.4 88.6 1.6 M M
12000 1.5 34.7 145 10 5 6.9 3.8 28.8 83.8 -1.0 693 3.5
10000 5.6 42.1 140 11 6 7.7 4.2 27.1 80.8 -2.8 511 2.6
9000 8.4 47.1 135 12 6 7.5 4.1 26.3 79.3 -3.8 391 2.0
8000 10.7 51.3 140 13 7 9.3 5.1 25.7 78.3 -4.4 292 1.5
7500 11.5 52.7 140 14 7 4.9 2.7 25.1 77.2 -5.1 252 1.3
7000 12.7 54.9 140 15 8 7.4 4.1 24.8 76.6 -5.5 204 1.0
6500 13.7 56.7 140 16 8 6.9 3.8 24.3 75.8 -5.9 159 0.8
6000 14.8 58.6 135 16 8 7.2 3.9 24.0 75.3 -6.3 110 0.6
5500 15.7 60.3 135 16 8 6.4 3.5 23.5 74.3 -6.8 67 0.3
5000 16.7 62.1 130 15 7 5.9 3.3 23.0 73.4 -7.4 24 0.1
4750 17.1 62.8 135 14 7 3.6 2.0 22.6 72.8 -7.8 6 0.0
4500 17.2 63.0 130 12 6 1.0 0.6 22.0 71.7 -8.4 M M
4250 17.2 63.0 125 10 5 -0.8 -0.4 21.3 70.4 -9.1 M M
4000 17.0 62.6 120 9 4 -4.1 -2.2 20.4 68.7 -10.0 M M
3750 16.9 62.4 115 8 4 2.7 1.5 19.5 67.1 -11.0 M M
3500 17.0 62.6 095 5 3 -7.2 -4.0 18.9 66.1 -11.6 M M
3400 17.0 62.6 095 5 3 -7.2 -4.0 18.9 66.1 -11.6 M M
3300 15.1 59.2 085 5 2 -44.6 -24.5 16.5 61.8 -14.0 20 0.1
3200 15.1 59.2 085 5 2 -44.6 -24.5 16.5 61.8 -14.0 20 0.1
3100 15.1 59.2 085 5 2 -44.6 -24.5 16.5 61.8 -14.0 20 0.1
3000 12.6 54.7 085 4 2 7.3 4.0 13.6 56.5 -16.8 87 0.4
2900 M M M M M M M M M M M M
* * * * * * NUMERICAL WEATHER PREDICTION MODEL FORECAST DATA VALID * * * * * *
09/21/2026 AT 0900 MDT | 09/21/2026 AT 1200 MDT
|
CAPE... 0.0 LI... +2.0 | CAPE... 0.0 LI... +1.8
CINH... 0.0 K INDEX... +13.1 | CINH... -0.1 K INDEX... +11.3
|
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 -55.0 -67.0 230 17 9 3.6 2.0 | -54.8 -66.6 225 18 9 2.7 1.5
38000 -51.9 -61.4 225 11 6 5.3 2.9 | -52.0 -61.6 225 15 7 4.8 2.6
36000 -48.7 -55.7 210 6 3 5.2 2.9 | -49.1 -56.4 220 11 6 4.8 2.6
34000 -44.5 -48.1 215 4 2 8.1 4.4 | -44.5 -48.1 220 10 5 8.1 4.4
32000 -39.6 -39.3 240 5 3 8.1 4.4 | -39.7 -39.5 230 10 5 8.1 4.4
30000 -35.1 -31.2 255 6 3 7.1 3.9 | -35.2 -31.4 240 10 5 7.2 4.0
28000 -30.9 -23.6 260 8 4 7.1 3.9 | -30.8 -23.4 245 11 6 7.2 4.0
26000 -26.2 -15.2 260 9 5 6.8 3.7 | -26.8 -16.2 250 12 6 6.7 3.7
24000 -22.3 -8.1 260 9 5 6.3 3.5 | -22.8 -9.0 255 12 6 6.5 3.6
22000 -18.5 -1.3 255 5 3 6.2 3.4 | -18.9 -2.0 235 8 4 6.5 3.6
20000 -14.3 6.3 215 3 1 7.1 3.9 | -14.2 6.4 210 7 3 7.2 3.9
18000 -9.8 14.4 170 4 2 7.9 4.3 | -9.7 14.5 190 7 3 7.7 4.2
16000 -5.4 22.3 145 6 3 6.9 3.8 | -5.5 22.1 180 7 4 6.5 3.6
14000 -1.9 28.6 140 9 4 5.0 2.8 | -2.1 28.2 170 9 5 6.0 3.3
12000 1.3 34.3 140 9 5 6.3 3.5 | 1.6 34.9 165 11 5 7.5 4.1
10000 5.1 41.2 140 10 5 8.3 4.6 | 5.4 41.7 155 10 5 8.2 4.5
9000 8.2 46.8 140 11 6 8.1 4.4 | 7.8 46.0 155 10 5 8.7 4.8
8000 10.7 51.3 140 13 7 9.7 5.3 | 10.4 50.7 150 12 6 9.9 5.5
7500 11.5 52.7 140 14 7 4.0 2.2 | 12.0 53.6 145 13 7 5.0 2.8
7000 12.5 54.5 140 16 8 6.7 3.7 | 13.1 55.6 140 14 7 6.6 3.6
6500 13.4 56.1 135 17 9 6.0 3.3 | 13.9 57.0 135 15 8 6.1 3.4
6000 14.3 57.7 130 17 9 5.6 3.1 | 14.8 58.6 135 13 7 4.9 2.7
5500 15.0 59.0 130 17 9 6.2 3.4 | 15.6 60.1 135 11 6 7.7 4.2
5000 15.8 60.4 130 14 7 1.5 0.8 | 16.6 61.9 140 9 5 4.1 2.2
4750 15.8 60.4 130 12 6 -1.0 -0.6 | 16.8 62.2 140 7 4 4.6 2.5
4500 15.8 60.4 130 10 5 1.2 0.6 | 17.4 63.3 145 7 4 8.8 4.8
4250 15.8 60.4 130 9 5 -1.2 -0.7 | 18.1 64.6 145 7 4 9.2 5.0
4000 15.6 60.1 130 7 3 -5.6 -3.1 | 18.7 65.7 150 6 3 9.0 4.9
3750 15.3 59.5 130 5 2 1.1 0.6 | 19.4 66.9 150 6 3 9.8 5.4
3500 15.6 60.1 120 3 2 1.4 0.8 | 20.2 68.4 150 6 3 13.2 7.3
3400 15.6 60.1 120 3 2 1.4 0.8 | 20.2 68.4 150 6 3 13.2 7.3
3300 15.1 59.2 100 3 1 -15.7 -8.6 | 21.4 70.5 155 6 3 16.9 9.3
3200 15.1 59.2 100 3 1 -15.7 -8.6 | 21.4 70.5 155 6 3 16.9 9.3
3100 15.1 59.2 100 3 1 -15.7 -8.6 | 21.4 70.5 155 6 3 16.9 9.3
3000 14.4 57.9 070 2 1 13.0 7.2 | 22.6 72.7 155 5 3 13.8 7.6
2900 M M M M M M M | M M M M M M M
09/21/2026 AT 1500 MDT | 09/21/2026 AT 1800 MDT
|
CAPE... 0.0 LI... +1.2 | CAPE... 0.0 LI... +1.6
CINH... -0.2 K INDEX... +12.3 | CINH... 0.0 K INDEX... +17.3
|
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 -53.9 -65.0 205 21 11 2.3 1.3 | -54.4 -65.9 195 24 13 2.8 1.5
38000 -51.7 -61.1 200 18 9 3.9 2.1 | -52.0 -61.6 190 21 11 4.0 2.2
36000 -49.4 -56.9 195 15 8 3.9 2.1 | -49.6 -57.3 185 18 9 4.0 2.2
34000 -45.0 -49.0 195 14 7 8.2 4.5 | -45.9 -50.6 185 17 9 7.6 4.2
32000 -40.1 -40.2 210 14 7 8.2 4.5 | -41.3 -42.3 190 17 9 7.6 4.2
30000 -35.6 -32.1 215 14 7 7.2 3.9 | -36.7 -34.1 195 17 9 7.8 4.3
28000 -31.3 -24.3 220 12 6 7.2 4.0 | -32.1 -25.8 200 15 8 7.8 4.3
26000 -27.2 -17.0 230 12 6 6.8 3.7 | -27.7 -17.9 205 14 7 7.1 3.9
24000 -23.1 -9.6 235 12 6 7.0 3.9 | -22.9 -9.2 215 13 7 7.1 3.9
22000 -18.9 -2.0 230 12 6 7.0 3.9 | -18.6 -1.5 220 13 7 7.2 3.9
20000 -14.0 6.8 225 10 5 7.2 4.0 | -14.2 6.4 225 11 6 7.3 4.0
18000 -9.7 14.5 220 9 5 7.3 4.0 | -10.0 14.0 230 10 5 6.9 3.8
16000 -5.7 21.7 220 9 5 6.5 3.6 | -6.2 20.8 235 10 5 6.3 3.5
14000 -1.8 28.8 215 10 5 6.7 3.7 | -2.1 28.2 240 13 6 8.6 4.7
12000 2.2 36.0 205 8 4 7.2 3.9 | 2.7 36.9 240 10 5 8.3 4.5
10000 6.5 43.7 160 7 4 7.8 4.3 | 7.6 45.7 205 3 2 8.3 4.6
9000 8.7 47.7 150 8 4 8.7 4.8 | 10.7 51.3 135 4 2 8.1 4.5
8000 11.3 52.3 145 9 4 10.0 5.5 | 13.3 55.9 130 5 2 9.0 4.9
7500 13.2 55.8 145 8 4 8.0 4.4 | 14.2 57.6 135 4 2 7.9 4.4
7000 14.4 57.9 150 8 4 9.6 5.3 | 15.6 60.1 135 4 2 9.3 5.1
6500 15.9 60.6 150 8 4 9.4 5.2 | 17.1 62.8 140 4 2 10.0 5.5
6000 17.3 63.1 155 8 4 9.5 5.2 | 18.5 65.3 145 4 2 9.8 5.4
5500 18.7 65.7 155 8 4 10.0 5.5 | 20.0 68.0 150 4 2 9.9 5.4
5000 20.2 68.4 155 7 4 10.2 5.6 | 21.5 70.7 155 3 2 10.2 5.6
4750 21.0 69.8 160 8 4 10.3 5.6 | 22.3 72.1 155 4 2 10.2 5.6
4500 21.7 71.1 160 7 4 10.0 5.5 | 23.0 73.4 155 3 2 9.6 5.3
4250 22.5 72.5 160 7 4 10.0 5.5 | 23.7 74.7 160 3 2 9.6 5.3
4000 23.2 73.8 165 7 4 10.4 5.7 | 24.4 75.9 160 3 2 9.4 5.1
3750 24.0 75.2 165 7 4 9.3 5.1 | 25.1 77.2 160 3 2 9.2 5.0
3500 24.7 76.5 165 6 3 11.1 6.1 | 25.8 78.4 165 3 2 9.2 5.0
3400 24.7 76.5 165 6 3 11.1 6.1 | 25.8 78.4 165 3 2 9.2 5.0
3300 25.8 78.4 165 6 3 19.8 10.9 | 26.5 79.7 165 3 1 9.9 5.4
3200 25.8 78.4 165 6 3 19.8 10.9 | 26.5 79.7 165 3 1 9.9 5.4
3100 25.8 78.4 165 6 3 19.8 10.9 | 26.5 79.7 165 3 1 9.9 5.4
3000 27.4 81.3 170 6 3 19.3 10.6 | 27.3 81.1 165 3 2 11.6 6.4
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
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