455
UXUS97 KBOI 181305
SRGBOI
SOARING FORECAST
NATIONAL WEATHER SERVICE BOISE, IDAHO
705 AM MDT THURSDAY, SEPTEMBER 18, 2025
THIS FORECAST IS FOR THURSDAY, SEPTEMBER 18, 2025:
IF THE TRIGGER TEMPERATURE OF 80.2 F/26.8 C IS REACHED...THEN
THERMAL SOARING INDEX....................... FAIR
MAXIMUM RATE OF LIFT........................ 394 FT/MIN (2.0 M/S)
MAXIMUM HEIGHT OF THERMALS.................. 9211 FT MSL (6350 FT AGL)
FORECAST MAXIMUM TEMPERATURE................... 86.0 F/30.5 C
TIME OF TRIGGER TEMPERATURE.................... 1330 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................. 7530 FT MSL (4669 FT AGL)
THERMAL SOARING OUTLOOK FOR FRIDAY 09/19....... GOOD
WAVE SOARING INDEX............................. NOT AVAILABLE
REMARKS...
SUNRISE/SUNSET.................... 07:28:20 / 19:49:17 MDT
TOTAL POSSIBLE SUNSHINE........... 12 HR 20 MIN 57 SEC (740 MIN 57 SEC)
ALTITUDE OF SUN AT 13:38:49 MDT... 47.10 DEGREES
UPPER AIR DATA FROM RAWINSONDE OBSERVATION TAKEN ON 09/18/2025 AT 0600 MDT
FREEZING LEVEL.................. 14640 FT MSL (11779 FT AGL)
CONVECTIVE CONDENSATION LEVEL... 16589 FT MSL (13728 FT AGL)
LIFTED CONDENSATION LEVEL....... 13797 FT MSL (10936 FT AGL)
LIFTED INDEX.................... +3.5
K INDEX......................... -4.7
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 -54.3 -65.7 265 32 16 4.6 2.5 64.0 147.2 22.1 M M
38000 -51.7 -61.1 265 29 15 1.6 0.9 59.1 138.4 19.4 M M
36000 -47.9 -54.2 265 26 13 2.8 1.5 55.0 130.9 17.1 M M
34000 -43.9 -47.0 265 23 12 7.2 4.0 52.2 125.9 15.6 M M
32000 -39.4 -38.9 265 22 11 8.7 4.7 50.3 122.6 14.7 M M
30000 -34.9 -30.8 260 15 8 8.4 4.6 48.6 119.5 13.8 M M
28000 -29.9 -21.8 265 14 7 8.4 4.6 47.5 117.5 13.3 M M
26000 -25.0 -13.0 250 14 7 7.9 4.3 46.2 115.1 12.5 M M
24000 -19.9 -3.8 275 11 6 9.1 5.0 45.3 113.5 12.1 M M
22000 -15.1 4.8 270 10 5 1.5 0.8 44.0 111.1 11.3 M M
20000 -10.7 12.7 260 8 4 6.6 3.6 42.2 108.0 10.1 M M
18000 -6.2 20.8 270 8 4 5.9 3.2 39.6 103.3 8.2 M M
16000 -2.7 27.1 270 7 4 5.9 3.2 37.0 98.6 6.0 M M
14000 1.6 34.9 250 10 5 7.9 4.3 35.3 95.6 4.6 M M
12000 5.8 42.4 245 10 5 3.8 2.1 33.4 92.1 3.0 M M
10000 9.8 49.6 240 5 3 5.8 3.2 31.5 88.6 1.2 M M
9000 10.8 51.4 150 5 3 -0.8 -0.5 29.7 85.4 -0.7 392 2.0
8000 11.9 53.4 170 10 5 6.9 3.8 28.2 82.7 -2.5 329 1.7
7500 12.9 55.2 160 10 5 9.1 5.0 27.8 82.1 -3.0 284 1.4
7000 14.3 57.7 145 10 5 9.1 5.0 27.8 82.0 -3.1 227 1.2
6500 15.7 60.3 150 10 5 9.1 5.0 27.6 81.8 -3.2 171 0.9
6000 17.1 62.8 160 10 5 9.5 5.2 27.6 81.6 -3.2 115 0.6
5500 18.2 64.8 160 9 5 5.6 3.1 27.2 81.0 -3.6 67 0.3
5000 19.0 66.2 155 10 5 6.2 3.4 26.6 79.9 -4.3 27 0.1
4750 19.5 67.1 155 10 5 6.9 3.8 26.4 79.5 -4.5 6 0.0
4500 20.0 68.0 150 10 5 7.1 3.9 26.2 79.1 -4.8 M M
4250 20.5 68.9 145 10 5 6.8 3.8 26.0 78.8 -5.0 M M
4000 21.1 70.0 140 9 4 7.5 4.1 25.8 78.4 -5.2 M M
3750 21.6 70.9 135 7 3 5.1 2.8 25.6 78.0 -5.4 M M
3500 22.1 71.8 135 5 2 14.2 7.8 25.4 77.6 -5.7 M M
3400 22.5 72.5 135 3 1 -22.1 -12.1 25.1 77.2 -5.9 M M
3300 22.5 72.5 135 3 1 -22.1 -12.1 25.1 77.2 -5.9 M M
3200 17.8 64.0 125 1 0 -93.6 -51.4 19.7 67.4 -11.4 4 0.0
3100 17.8 64.0 125 1 0 -93.6 -51.4 19.7 67.4 -11.4 4 0.0
3000 17.8 64.0 125 1 0 -93.6 -51.4 19.7 67.4 -11.4 4 0.0
2900 16.0 60.8 325 1 1 137.7 75.6 17.1 62.8 -14.0 52 0.3
* * * * * * NUMERICAL WEATHER PREDICTION MODEL FORECAST DATA VALID * * * * * *
09/18/2025 AT 0900 MDT | 09/18/2025 AT 1200 MDT
|
CAPE... 0.0 LI... +5.6 | CAPE... 0.0 LI... +5.8
CINH... -0.2 K INDEX... -2.2 | CINH... 0.0 K INDEX... -0.2
|
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 -54.5 -66.1 260 29 15 3.9 2.2 | -54.8 -66.6 255 31 16 3.6 2.0
38000 -51.6 -60.9 260 27 14 4.9 2.7 | -51.4 -60.5 255 30 15 5.0 2.7
36000 -48.3 -54.9 265 24 13 5.0 2.7 | -48.4 -55.1 250 29 15 5.1 2.8
34000 -44.1 -47.4 260 22 11 7.7 4.2 | -44.2 -47.6 250 26 14 7.7 4.3
32000 -39.5 -39.1 260 20 10 7.7 4.2 | -39.6 -39.3 250 24 12 7.8 4.3
30000 -34.9 -30.8 255 19 10 7.7 4.2 | -34.9 -30.8 250 22 11 7.8 4.3
28000 -30.3 -22.5 255 18 9 7.7 4.2 | -30.3 -22.5 250 20 10 7.8 4.3
26000 -25.6 -14.1 250 16 8 7.9 4.3 | -25.6 -14.1 245 19 10 7.8 4.3
24000 -20.9 -5.6 250 14 7 7.8 4.3 | -21.1 -6.0 250 17 9 7.3 4.0
22000 -15.7 3.7 275 12 6 7.8 4.3 | -16.2 2.8 270 12 6 7.5 4.1
20000 -11.0 12.2 285 10 5 7.8 4.3 | -11.2 11.8 280 9 5 8.3 4.6
18000 -6.7 19.9 290 9 5 6.6 3.6 | -6.8 19.8 285 7 4 6.6 3.6
16000 -3.0 26.6 295 7 4 6.3 3.4 | -3.1 26.4 290 5 2 6.3 3.5
14000 0.9 33.6 300 4 2 6.5 3.6 | 0.7 33.3 270 2 1 6.5 3.5
12000 4.7 40.5 255 1 1 6.1 3.4 | 4.6 40.3 205 3 1 5.8 3.2
10000 8.1 46.6 165 4 2 5.6 3.1 | 8.0 46.4 180 5 3 6.5 3.6
9000 9.7 49.5 155 7 3 6.3 3.5 | 9.9 49.8 165 7 4 6.7 3.7
8000 12.1 53.8 150 10 5 8.3 4.6 | 12.4 54.3 155 10 5 7.9 4.3
7500 12.9 55.2 150 9 5 5.9 3.2 | 13.2 55.8 150 9 5 6.4 3.5
7000 14.0 57.2 150 9 5 7.8 4.3 | 14.4 57.9 145 9 5 7.3 4.0
6500 15.0 59.0 145 9 5 6.5 3.5 | 15.3 59.5 145 10 5 6.7 3.7
6000 16.1 61.0 145 9 4 5.8 3.2 | 16.4 61.5 140 9 4 5.6 3.1
5500 16.7 62.1 145 9 4 4.1 2.3 | 17.1 62.8 140 8 4 6.2 3.4
5000 17.2 63.0 145 9 5 1.1 0.6 | 17.9 64.2 145 6 3 2.4 1.3
4750 17.2 63.0 150 9 5 -0.9 -0.5 | 18.0 64.4 145 5 3 2.5 1.4
4500 17.2 63.0 150 9 5 1.6 0.9 | 18.4 65.1 150 5 2 7.0 3.9
4250 17.3 63.1 145 9 4 -1.4 -0.8 | 18.9 66.0 155 5 2 8.4 4.6
4000 16.9 62.4 145 8 4 -6.0 -3.3 | 19.6 67.3 155 4 2 9.2 5.0
3750 16.6 61.9 145 7 3 -2.0 -1.1 | 20.3 68.5 160 4 2 9.4 5.2
3500 16.5 61.7 130 5 2 -2.4 -1.3 | 21.1 70.0 160 4 2 12.6 6.9
3400 16.5 61.7 130 5 2 -2.4 -1.3 | 21.1 70.0 160 4 2 12.6 6.9
3300 16.0 60.8 115 4 2 -13.4 -7.4 | 22.2 72.0 165 4 2 17.0 9.3
3200 16.0 60.8 115 4 2 -13.4 -7.4 | 22.2 72.0 165 4 2 17.0 9.3
3100 16.0 60.8 115 4 2 -13.4 -7.4 | 22.2 72.0 165 4 2 17.0 9.3
3000 15.1 59.2 105 3 2 0.5 0.3 | 23.4 74.1 165 4 2 13.8 7.6
2900 M M M M M M M | M M M M M M M
09/18/2025 AT 1500 MDT | 09/18/2025 AT 1800 MDT
|
CAPE... 0.0 LI... +4.8 | CAPE... 0.0 LI... +4.9
CINH... -0.2 K INDEX... -1.5 | CINH... 0.0 K INDEX... -1.7
|
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 -55.3 -67.5 250 36 19 4.0 2.2 | -55.7 -68.3 250 44 22 4.6 2.5
38000 -51.5 -60.7 250 40 21 5.6 3.1 | -51.8 -61.2 250 44 23 6.4 3.5
36000 -48.2 -54.8 250 43 22 5.7 3.1 | -47.5 -53.5 250 45 23 6.5 3.6
34000 -43.8 -46.8 250 38 20 7.8 4.3 | -43.0 -45.4 250 38 20 7.8 4.3
32000 -39.1 -38.4 255 30 16 7.9 4.3 | -38.3 -36.9 250 29 15 7.8 4.3
30000 -34.4 -29.9 255 25 13 7.8 4.3 | -34.1 -29.4 245 22 12 6.7 3.7
28000 -29.8 -21.6 250 21 11 7.8 4.3 | -30.1 -22.2 245 17 9 6.5 3.6
26000 -25.4 -13.7 250 20 10 7.4 4.0 | -25.6 -14.1 250 17 9 7.7 4.2
24000 -21.0 -5.8 250 18 9 7.0 3.9 | -21.1 -6.0 255 15 8 7.0 3.8
22000 -16.3 2.7 265 12 6 7.3 4.0 | -16.4 2.5 270 11 6 7.2 4.0
20000 -11.3 11.7 275 9 5 8.4 4.6 | -11.4 11.5 275 8 4 8.5 4.7
18000 -6.6 20.1 285 6 3 7.1 3.9 | -6.5 20.3 280 6 3 7.7 4.2
16000 -2.9 26.8 280 4 2 6.2 3.4 | -2.5 27.5 285 4 2 6.3 3.4
14000 1.0 33.8 255 2 1 6.8 3.7 | 1.4 34.5 270 3 1 6.9 3.8
12000 4.9 40.8 205 3 1 6.6 3.6 | 5.5 41.9 220 2 1 6.7 3.7
10000 8.7 47.7 160 4 2 6.9 3.8 | 9.6 49.3 145 4 2 7.1 3.9
9000 10.8 51.4 155 5 2 7.7 4.2 | 11.7 53.1 130 4 2 7.8 4.3
8000 13.7 56.7 145 6 3 8.0 4.4 | 14.8 58.6 120 3 1 8.2 4.5
7500 14.6 58.3 145 5 3 6.9 3.8 | 15.7 60.3 115 2 1 7.1 3.9
7000 15.6 60.1 145 5 2 8.6 4.7 | 16.8 62.2 115 1 0 8.6 4.7
6500 16.9 62.4 150 4 2 9.0 5.0 | 18.2 64.8 000 0 0 10.1 5.5
6000 18.3 64.9 150 4 2 9.0 4.9 | 19.6 67.3 000 0 0 9.3 5.1
5500 19.6 67.3 155 4 2 9.8 5.4 | 21.0 69.8 270 1 0 10.2 5.6
5000 21.1 70.0 160 4 2 10.3 5.6 | 22.5 72.5 270 1 1 10.4 5.7
4750 21.9 71.4 160 4 2 10.5 5.8 | 23.3 73.9 275 2 1 10.0 5.5
4500 22.6 72.7 165 4 2 9.9 5.5 | 24.0 75.2 275 2 1 8.9 4.9
4250 23.4 74.1 165 3 2 10.1 5.5 | 24.7 76.5 275 2 1 9.2 5.0
4000 24.1 75.4 170 3 2 10.7 5.9 | 25.4 77.7 275 2 1 9.8 5.4
3750 24.9 76.8 170 3 2 9.5 5.2 | 26.1 79.0 275 2 1 9.2 5.1
3500 25.6 78.1 175 3 2 10.6 5.8 | 26.7 80.1 275 2 1 8.4 4.6
3400 25.6 78.1 175 3 2 10.6 5.8 | 26.7 80.1 275 2 1 8.4 4.6
3300 26.6 79.9 175 3 2 18.3 10.0 | 27.4 81.3 275 2 1 9.9 5.4
3200 26.6 79.9 175 3 2 18.3 10.0 | 27.4 81.3 275 2 1 9.9 5.4
3100 26.6 79.9 175 3 2 18.3 10.0 | 27.4 81.3 275 2 1 9.9 5.4
3000 28.1 82.6 180 3 2 19.2 10.5 | 28.2 82.8 275 2 1 11.0 6.0
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
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