778
UXUS97 KBOI 181305
SRGBOI
SOARING FORECAST
NATIONAL WEATHER SERVICE BOISE, IDAHO
605 AM MST THURSDAY, DECEMBER 18, 2025
THIS FORECAST IS FOR THURSDAY, DECEMBER 18, 2025:
IF THE TRIGGER TEMPERATURE OF 49.0 F/9.5 C IS REACHED...THEN
THERMAL SOARING INDEX....................... POOR
MAXIMUM RATE OF LIFT........................ 0 FT/MIN (0.0 M/S)
MAXIMUM HEIGHT OF THERMALS.................. 6521 FT MSL (3660 FT AGL)
FORECAST MAXIMUM TEMPERATURE................... 47.0 F/8.8 C
TIME OF TRIGGER TEMPERATURE.................... NONE
TIME OF OVERDEVELOPMENT........................ NONE
MIDDLE/HIGH CLOUDS DURING SOARING WINDOW....... BROKEN/OVERCAST OPAQUE MIDDLE
SURFACE WINDS DURING SOARING WINDOW............ 20 MPH OR LESS
HEIGHT OF THE -3 THERMAL INDEX................. 3249 FT MSL (388 FT AGL)
THERMAL SOARING OUTLOOK FOR FRIDAY 12/19....... POOR
WAVE SOARING INDEX............................. NOT AVAILABLE
REMARKS...
SUNRISE/SUNSET.................... 08:13:28 / 17:09:56 MST
TOTAL POSSIBLE SUNSHINE........... 8 HR 56 MIN 28 SEC (536 MIN 28 SEC)
ALTITUDE OF SUN AT 12:41:42 MST... 22.35 DEGREES
UPPER AIR DATA FROM RAWINSONDE OBSERVATION TAKEN ON 12/18/2025 AT 0500 MST
FREEZING LEVEL.................. 5029 FT MSL (2168 FT AGL)
CONVECTIVE CONDENSATION LEVEL... 19901 FT MSL (17040 FT AGL)
LIFTED CONDENSATION LEVEL....... 10286 FT MSL (7426 FT AGL)
LIFTED INDEX.................... +19.5
K INDEX......................... -4.8
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 -63.5 -82.3 315 122 63 3.9 2.1 55.6 132.0 30.1 M M
38000 -61.5 -78.7 315 122 63 6.5 3.6 49.5 121.2 27.0 M M
36000 -56.4 -69.5 310 121 62 8.7 4.8 48.5 119.3 27.1 M M
34000 -50.9 -59.6 300 121 62 9.4 5.1 48.0 118.4 27.4 M M
32000 -46.1 -51.0 300 109 56 8.1 4.4 45.4 113.8 26.4 M M
30000 -41.7 -43.1 295 98 50 8.8 4.8 43.5 110.3 25.7 M M
28000 -36.4 -33.5 300 99 51 8.8 4.8 42.8 109.1 25.8 M M
26000 -31.1 -24.0 295 95 49 8.9 4.9 41.9 107.4 25.7 M M
24000 -26.5 -15.7 295 89 46 6.9 3.8 40.5 104.9 25.2 M M
22000 -22.3 -8.1 295 82 42 6.6 3.6 38.4 101.2 24.1 M M
20000 -18.6 -1.5 290 74 38 4.9 2.7 35.9 96.6 22.5 M M
18000 -15.2 4.6 285 68 35 4.9 2.7 33.0 91.4 20.5 M M
16000 -11.9 10.6 285 54 28 5.2 2.9 29.3 84.8 17.7 M M
14000 -14.5 5.9 260 41 21 14.3 7.8 19.4 67.0 9.6 M M
12000 -10.3 13.5 275 28 14 0.1 0.1 17.6 63.6 8.2 M M
10000 -7.3 18.9 275 20 10 5.2 2.9 14.4 57.9 5.5 M M
9000 -6.4 20.5 250 22 11 -1.9 -1.0 12.2 54.0 3.5 M M
8000 -5.2 22.6 250 19 10 7.3 4.0 10.6 51.1 1.9 M M
7500 -4.2 24.4 255 14 7 7.3 4.0 10.2 50.3 1.4 M M
7000 -3.0 26.6 260 8 4 8.9 4.9 9.8 49.7 1.2 M M
6500 -2.6 27.3 230 6 3 -5.0 -2.7 8.7 47.7 0.1 M M
6000 -2.4 27.7 195 7 3 7.6 4.2 7.5 45.5 -1.1 176 0.9
5500 -1.4 29.5 175 6 3 8.1 4.4 7.1 44.8 -1.6 131 0.7
5000 -0.1 31.8 155 5 3 8.2 4.5 6.9 44.4 -1.8 79 0.4
4750 0.5 32.9 140 5 3 8.1 4.5 6.7 44.1 -1.9 53 0.3
4500 1.1 34.0 135 7 3 8.1 4.4 6.6 43.9 -2.1 28 0.1
4250 1.7 35.1 130 8 4 8.1 4.4 6.5 43.7 -2.2 2 0.0
4000 2.3 36.1 130 9 4 8.1 4.4 6.4 43.4 -2.3 M M
3750 2.9 37.2 125 9 5 8.0 4.4 6.2 43.2 -2.5 M M
3500 3.5 38.3 120 10 5 8.4 4.6 6.1 43.0 -2.6 M M
3400 4.1 39.4 115 11 5 6.9 3.8 6.0 42.7 -2.7 M M
3300 4.1 39.4 115 11 5 6.9 3.8 6.0 42.7 -2.7 M M
3200 4.2 39.6 115 11 6 -7.7 -4.2 5.3 41.6 -3.4 M M
3100 4.2 39.6 115 11 6 -7.7 -4.2 5.3 41.6 -3.4 M M
3000 4.2 39.6 115 11 6 -7.7 -4.2 5.3 41.6 -3.4 M M
2900 2.0 35.6 125 11 6 -54.9 -30.1 2.5 36.5 -6.3 M M
* * * * * * NUMERICAL WEATHER PREDICTION MODEL FORECAST DATA VALID * * * * * *
12/18/2025 AT 0800 MST | 12/18/2025 AT 1100 MST
|
CAPE... 0.0 LI... +14.5 | CAPE... 0.0 LI... +9.8
CINH... -0.2 K INDEX... +5.3 | CINH... 0.0 K INDEX... +14.7
|
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 -61.6 -78.9 305 101 52 0.3 0.2 | -62.1 -79.8 305 106 55 -1.1 -0.6
38000 -59.4 -74.9 305 102 52 7.4 4.1 | -60.4 -76.7 305 105 54 7.3 4.0
36000 -55.0 -67.0 300 104 53 7.4 4.1 | -55.4 -67.7 300 102 52 7.3 4.0
34000 -49.9 -57.8 295 106 54 7.7 4.2 | -51.0 -59.8 295 98 51 7.8 4.3
32000 -45.3 -49.5 295 106 55 7.7 4.2 | -46.3 -51.3 290 93 48 7.9 4.3
30000 -40.7 -41.3 295 105 54 7.5 4.1 | -41.4 -42.5 285 88 45 8.6 4.7
28000 -36.2 -33.2 295 97 50 7.5 4.1 | -36.3 -33.3 285 84 43 8.7 4.8
26000 -31.5 -24.7 290 92 47 8.5 4.6 | -31.1 -24.0 285 81 42 8.5 4.7
24000 -26.5 -15.7 285 90 47 8.7 4.7 | -26.1 -15.0 285 81 42 8.7 4.8
22000 -22.1 -7.8 285 86 44 7.2 4.0 | -21.2 -6.2 285 81 42 7.3 4.0
20000 -17.7 0.1 285 76 39 6.0 3.3 | -17.1 1.2 280 79 41 6.7 3.7
18000 -14.3 6.3 280 65 33 5.4 2.9 | -13.3 8.1 280 77 40 5.8 3.2
16000 -11.3 11.7 275 55 28 4.8 2.6 | -10.1 13.8 280 73 38 4.9 2.7
14000 -8.7 16.3 270 49 25 4.4 2.4 | -7.6 18.3 280 68 35 4.1 2.2
12000 -8.3 17.1 260 41 21 -2.1 -1.2 | -5.5 22.1 270 57 29 2.4 1.3
10000 -7.6 18.3 245 29 15 3.6 2.0 | -4.0 24.8 255 42 22 2.6 1.4
9000 -6.4 20.5 240 23 12 4.8 2.7 | -3.4 25.9 245 35 18 2.1 1.2
8000 -4.4 24.1 230 19 10 7.6 4.2 | -2.3 27.9 230 27 14 3.1 1.7
7500 -2.6 27.3 215 17 9 5.6 3.1 | -1.9 28.6 220 24 12 1.6 0.9
7000 -1.8 28.8 205 16 8 5.8 3.2 | -1.7 28.9 210 22 11 1.3 0.7
6500 -0.9 30.4 195 16 8 5.4 3.0 | -1.6 29.1 195 20 10 0.8 0.4
6000 -0.3 31.5 180 16 8 4.3 2.4 | -1.4 29.5 180 21 11 0.8 0.4
5500 0.5 32.9 165 18 9 5.1 2.8 | -1.3 29.7 165 23 12 1.3 0.7
5000 1.1 34.0 155 18 9 4.3 2.4 | -1.1 30.0 150 23 12 1.3 0.7
4750 1.4 34.5 150 20 10 4.9 2.7 | -1.0 30.2 145 24 12 1.0 0.5
4500 1.7 35.1 145 20 10 4.5 2.5 | -0.9 30.4 145 24 12 2.3 1.2
4250 2.0 35.6 145 18 9 3.5 1.9 | -0.7 30.7 140 21 11 3.3 1.8
4000 2.2 36.0 140 17 9 0.7 0.4 | -0.4 31.3 140 19 10 2.2 1.2
3750 2.2 36.0 135 17 9 2.3 1.2 | -0.3 31.5 135 19 10 3.9 2.1
3500 2.5 36.5 130 14 7 1.7 0.9 | 0.1 32.2 135 16 8 6.5 3.6
3400 2.5 36.5 130 14 7 1.7 0.9 | 0.1 32.2 135 16 8 6.5 3.6
3300 2.1 35.8 125 11 6 -11.3 -6.2 | 0.5 32.9 135 13 7 4.3 2.3
3200 2.1 35.8 125 11 6 -11.3 -6.2 | 0.5 32.9 135 13 7 4.3 2.3
3100 2.1 35.8 125 11 6 -11.3 -6.2 | 0.5 32.9 135 13 7 4.3 2.3
3000 1.0 33.8 120 9 4 -13.1 -7.2 | 0.8 33.4 135 12 6 3.5 1.9
2900 M M M M M M M | M M M M M M M
12/18/2025 AT 1400 MST | 12/18/2025 AT 1700 MST
|
CAPE... 0.0 LI... +7.1 | CAPE... 0.0 LI... +5.2
CINH... 0.0 K INDEX... +18.7 | CINH... -1.3 K INDEX... +15.7
|
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 -61.6 -78.9 285 92 47 -0.2 -0.1 | -62.0 -79.6 280 102 52 0.3 0.2
38000 -59.5 -75.1 285 89 46 7.3 4.0 | -59.5 -75.1 280 99 51 8.0 4.4
36000 -54.6 -66.3 285 91 47 7.3 4.0 | -54.1 -65.4 280 96 49 8.0 4.4
34000 -50.0 -58.0 285 93 48 8.5 4.7 | -49.2 -56.6 285 95 49 8.3 4.6
32000 -44.8 -48.6 285 94 48 8.5 4.7 | -44.2 -47.6 280 99 51 8.4 4.6
30000 -39.9 -39.8 285 93 48 7.2 3.9 | -39.3 -38.7 280 102 52 7.7 4.2
28000 -35.6 -32.1 285 88 45 7.2 4.0 | -34.7 -30.5 280 97 50 7.8 4.3
26000 -31.1 -24.0 285 84 43 7.9 4.3 | -30.1 -22.2 280 92 48 7.5 4.1
24000 -26.4 -15.5 285 80 41 8.0 4.4 | -25.6 -14.1 280 86 44 7.8 4.3
22000 -21.5 -6.7 280 71 36 7.4 4.0 | -21.5 -6.7 275 85 44 6.0 3.3
20000 -17.2 1.0 280 71 37 7.1 3.9 | -17.9 -0.2 275 82 42 5.9 3.2
18000 -13.2 8.2 285 78 40 6.6 3.6 | -14.4 6.1 280 77 40 6.4 3.5
16000 -9.5 14.9 285 77 39 5.9 3.3 | -10.4 13.3 280 72 37 6.5 3.5
14000 -6.3 20.7 285 71 37 5.0 2.8 | -6.9 19.6 285 66 34 5.7 3.1
12000 -3.7 25.3 280 70 36 3.7 2.0 | -4.1 24.6 280 60 31 4.5 2.5
10000 -2.3 27.9 275 68 35 1.8 1.0 | -1.8 28.8 275 56 29 3.6 2.0
9000 -1.5 29.3 270 61 32 3.3 1.8 | -1.0 30.2 270 52 27 2.5 1.4
8000 0.1 32.2 265 50 26 6.5 3.6 | 0.6 33.1 260 43 22 8.1 4.4
7500 1.0 33.8 260 45 23 3.2 1.8 | 1.8 35.2 260 40 21 7.5 4.1
7000 1.6 34.9 250 40 20 6.0 3.3 | 3.0 37.4 255 38 20 8.2 4.5
6500 2.3 36.1 245 34 18 2.2 1.2 | 4.1 39.4 250 35 18 6.1 3.3
6000 2.4 36.3 225 27 14 0.3 0.2 | 5.0 41.0 240 30 15 6.5 3.6
5500 2.6 36.7 205 23 12 -0.1 -0.1 | 5.7 42.3 230 25 13 1.8 1.0
5000 2.4 36.3 180 20 10 -1.5 -0.8 | 5.8 42.4 205 19 10 1.0 0.5
4750 2.3 36.1 165 21 11 -1.3 -0.7 | 5.9 42.6 190 18 9 -0.4 -0.2
4500 2.2 36.0 155 22 11 0.7 0.4 | 5.8 42.4 175 18 9 -1.5 -0.8
4250 2.3 36.1 145 20 10 2.0 1.1 | 5.8 42.4 165 16 8 0.1 0.0
4000 2.4 36.3 140 17 9 1.0 0.6 | 5.8 42.4 150 15 8 -3.4 -1.9
3750 2.5 36.5 135 18 9 1.8 1.0 | 5.3 41.5 145 17 9 -7.1 -3.9
3500 2.7 36.9 135 16 8 4.5 2.5 | 4.8 40.6 140 15 8 -5.9 -3.2
3400 2.7 36.9 135 16 8 4.5 2.5 | 4.8 40.6 140 15 8 -5.9 -3.2
3300 3.0 37.4 130 14 7 2.8 1.6 | 4.4 39.9 140 13 7 -6.5 -3.6
3200 3.0 37.4 130 14 7 2.8 1.6 | 4.4 39.9 140 13 7 -6.5 -3.6
3100 3.0 37.4 130 14 7 2.8 1.6 | 4.4 39.9 140 13 7 -6.5 -3.6
3000 2.9 37.2 130 12 6 -9.3 -5.1 | 3.9 39.0 135 10 5 -4.2 -2.3
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