National Weather Service United States Department of Commerce

 

 Grand Junction Soaring Forecast

We are testing a new soaring forecast program. During this testing phase, the soaring forecast may not always be available or may not be updated. Please check the date of the soaring forecast before using the data. Feedback to our webmaster regarding this new soaring forecast program will be appreciated.

 


000
UXUS97 KGJT 201306
SRGGJT

Soaring Forecast
National Weather Service Grand Junction, Colorado
706 AM MDT Monday, March 20, 2023

This forecast is for Monday, March 20, 2023:

If the trigger temperature of 46.3 F/8.0 C is reached...then
Thermal Soaring Index....................... Poor
Maximum rate of lift........................ 0 ft/min (0.0 m/s)
Maximum height of thermals.................. 9356 ft MSL (4517 ft AGL)

Forecast maximum temperature................... 47.0 F/8.8 C
Time of trigger temperature.................... 1445 MDT
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................. 5829 ft MSL (990 ft AGL)
Thermal soaring outlook for Tuesday 03/21...... Fair

Wave Soaring Index............................. Not available

Remarks...

Sunrise/Sunset.................... 07:17:23 / 19:25:44 MDT
Total possible sunshine........... 12 hr 8 min 21 sec (728 min 21 sec)
Altitude of sun at 13:21:34 MDT... 50.54 degrees

Upper air data from rawinsonde observation taken on 03/20/2023 at 0600 MDT

Freezing level.................. 6837 ft MSL (1998 ft AGL)
Convective condensation level... 10242 ft MSL (5403 ft AGL)
Lifted condensation level....... 9989 ft MSL (5150 ft AGL)
Lifted index.................... +4.8
K index......................... +17.6

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
--------------------------------------------------------------------------------
50000 -57.5 -71.5 275 36 19 3.0 1.6 108.8 227.9 56.8 M M
45000 -57.9 -72.2 285 54 28 0.2 0.1 83.1 181.5 45.2 M M
40000 -54.2 -65.6 280 52 27 4.7 2.6 65.5 150.0 37.0 M M
38000 -54.6 -66.3 275 47 24 -1.1 -0.6 54.9 130.9 31.0 M M
36000 -55.3 -67.5 275 49 25 -1.1 -0.6 45.2 113.3 25.2 M M
34000 -54.9 -66.8 270 39 20 1.9 1.0 37.2 99.0 20.3 M M
32000 -53.0 -63.4 255 28 14 3.4 1.9 31.7 89.1 16.9 M M
30000 -51.0 -59.8 275 22 11 3.1 1.7 26.5 79.7 13.5 M M
29000 -49.4 -56.9 270 22 11 5.9 3.2 24.6 76.3 12.2 M M
28000 -47.3 -53.1 265 22 12 9.1 5.0 23.6 74.5 11.6 M M
27000 -44.5 -48.1 265 23 12 9.1 5.0 23.3 73.9 11.5 M M
26000 -41.8 -43.2 260 23 12 9.1 5.0 23.1 73.5 11.5 M M
25000 -39.0 -38.2 255 24 12 9.2 5.1 23.0 73.4 11.6 M M
24000 -36.2 -33.2 250 27 14 9.6 5.2 22.9 73.1 11.6 M M
23000 -33.5 -28.3 245 29 15 6.5 3.6 22.6 72.6 11.5 M M
22000 -31.5 -24.7 265 31 16 6.8 3.7 21.5 70.7 10.8 M M
21000 -29.5 -21.1 265 33 17 6.8 3.8 20.4 68.8 10.0 M M
20000 -26.9 -16.4 250 39 20 6.9 3.8 19.1 66.4 9.0 M M
19500 -25.9 -14.6 245 39 20 6.9 3.8 18.6 65.5 8.6 M M
19000 -24.9 -12.8 240 35 18 6.9 3.8 18.0 64.4 8.1 M M
18500 -23.8 -10.8 240 30 16 6.9 3.8 17.5 63.5 7.7 M M
18000 -22.8 -9.0 235 27 14 6.8 3.7 17.0 62.6 7.3 M M
17500 -21.8 -7.2 235 25 13 6.8 3.7 16.5 61.7 6.9 M M
17000 -20.8 -5.4 240 24 12 6.8 3.7 16.0 60.8 6.5 M M
16500 -19.8 -3.6 240 23 12 6.8 3.7 15.5 60.0 6.2 M M
16000 -18.8 -1.8 245 22 11 6.8 3.7 15.1 59.2 5.8 M M
15500 -17.8 -0.0 245 21 11 6.8 3.7 14.6 58.3 5.4 M M
15000 -16.8 1.8 245 22 11 6.8 3.7 14.1 57.4 4.9 M M
14500 -15.8 3.6 245 22 12 6.8 3.8 13.6 56.6 4.5 M M
14000 -14.7 5.5 245 23 12 6.8 3.8 13.2 55.8 4.1 M M
13500 -13.7 7.3 245 24 13 6.9 3.8 12.7 54.8 3.7 M M
13000 -12.7 9.1 240 27 14 6.9 3.8 12.2 53.9 3.2 M M
12500 -11.7 10.9 240 29 15 6.9 3.8 11.7 53.1 2.8 M M
12000 -10.7 12.7 240 32 16 6.9 3.8 11.2 52.2 2.3 M M
11500 -9.7 14.5 240 32 16 6.9 3.8 10.7 51.3 1.9 M M
11000 -8.7 16.3 235 30 15 6.9 3.8 10.2 50.4 1.4 M M
10500 -7.7 18.1 235 28 14 7.0 3.8 9.8 49.6 0.9 M M
10250 -7.2 19.0 235 27 14 7.1 3.9 9.6 49.2 0.7 M M
10000 -6.6 20.1 230 26 13 7.0 3.8 9.3 48.8 0.5 M M
9750 -6.1 21.0 230 25 13 7.3 4.0 9.1 48.4 0.3 M M
9500 -5.6 21.9 230 22 11 7.7 4.2 9.0 48.1 0.1 M M
9250 -5.0 23.0 225 19 10 7.7 4.2 8.8 47.8 -0.1 309 1.6
9000 -4.4 24.1 220 16 8 7.6 4.2 8.6 47.6 -0.2 284 1.4
8750 -3.9 25.0 215 14 7 7.8 4.3 8.5 47.3 -0.4 260 1.3
8500 -3.3 26.1 205 12 6 7.3 4.0 8.3 47.0 -0.6 236 1.2
8250 -2.9 26.8 185 13 6 2.3 1.2 8.0 46.3 -0.9 216 1.1
8000 -2.8 27.0 170 16 8 4.0 2.2 7.3 45.2 -1.5 206 1.0
7750 -2.2 28.0 170 18 9 8.7 4.8 7.2 44.9 -1.7 181 0.9
7500 -1.7 28.9 165 19 10 7.4 4.1 7.0 44.6 -1.9 157 0.8
7250 -1.1 30.0 160 21 11 7.8 4.3 6.9 44.3 -2.0 132 0.7
7000 -0.5 31.1 155 23 12 7.7 4.2 6.7 44.1 -2.2 108 0.5
6750 0.1 32.2 155 24 12 7.7 4.2 6.5 43.8 -2.3 83 0.4
6500 0.6 33.1 155 23 12 7.7 4.2 6.4 43.5 -2.5 59 0.3
6250 1.2 34.2 150 21 11 7.7 4.2 6.2 43.2 -2.7 34 0.2
6000 1.8 35.2 150 20 10 7.7 4.2 6.1 42.9 -2.8 9 0.0
5750 2.3 36.1 150 19 10 7.7 4.2 5.9 42.6 -3.0 M M
5500 2.9 37.2 155 16 8 7.7 4.2 5.7 42.3 -3.2 M M
5250 3.5 38.3 160 14 7 7.6 4.1 5.6 42.1 -3.4 M M
5000 4.1 39.4 165 10 5 8.2 4.5 5.4 41.8 -3.5 M M

* * * * * * Numerical weather prediction model forecast data valid * * * * * *

03/20/2023 at 0900 MDT | 03/20/2023 at 1200 MDT
|
CAPE... +3.4 LI... +1.8 | CAPE... +74.9 LI... +0.3
CINH... -7.1 K Index... +18.7` | CINH... -0.2 K Index... +21.1`
|
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
--------------------------------------------------------------------------------
50000 -57.6 -71.7 280 45 23 1.5 0.8 | -56.9 -70.4 270 46 24 1.5 0.8
45000 -55.3 -67.5 280 47 24 1.5 0.8 | -54.7 -66.5 275 48 24 1.5 0.8
40000 -54.1 -65.4 280 56 29 0.6 0.4 | -54.5 -66.1 270 65 34 -0.1 -0.1
38000 -53.8 -64.8 280 59 30 -0.1 -0.1 | -54.6 -66.3 270 72 37 0.2 0.1
36000 -53.8 -64.8 280 59 30 -0.1 -0.0 | -54.5 -66.1 270 73 38 0.1 0.1
34000 -53.9 -65.0 280 60 31 -0.1 -0.0 | -54.4 -65.9 270 75 38 0.1 0.0
32000 -52.3 -62.1 280 55 28 3.3 1.8 | -52.6 -62.7 270 71 37 3.8 2.1
30000 -50.4 -58.7 275 49 25 3.0 1.7 | -50.3 -58.5 265 67 34 3.5 1.9
29000 -48.6 -55.5 275 46 24 7.2 3.9 | -48.5 -55.3 265 62 32 7.0 3.8
28000 -46.5 -51.7 275 44 23 7.2 3.9 | -46.4 -51.5 265 57 29 7.0 3.9
27000 -44.3 -47.7 275 43 22 7.2 3.9 | -44.3 -47.7 265 51 26 7.0 3.9
26000 -42.1 -43.8 275 40 21 7.2 3.9 | -42.1 -43.8 265 46 23 9.0 4.9
25000 -39.4 -38.9 275 35 18 7.2 3.9 | -38.8 -37.8 265 42 22 8.8 4.8
24000 -37.3 -35.1 270 32 16 7.2 4.0 | -36.2 -33.2 265 39 20 8.8 4.8
23000 -35.0 -31.0 265 29 15 8.1 4.5 | -33.7 -28.7 265 36 18 7.4 4.1
22000 -32.6 -26.7 265 29 15 8.2 4.5 | -31.5 -24.7 265 33 17 7.4 4.1
21000 -30.1 -22.2 260 28 14 8.2 4.5 | -29.3 -20.7 265 30 16 7.5 4.1
20000 -27.7 -17.9 260 29 15 8.2 4.5 | -27.2 -17.0 260 28 15 6.6 3.6
19500 -26.5 -15.7 260 29 15 8.2 4.5 | -26.3 -15.3 260 28 14 6.6 3.6
19000 -25.2 -13.4 260 30 15 8.2 4.5 | -25.3 -13.5 255 27 14 6.6 3.6
18500 -24.0 -11.2 260 30 16 8.3 4.5 | -24.3 -11.7 255 26 13 6.6 3.6
18000 -22.8 -9.0 260 30 16 7.8 4.3 | -23.3 -9.9 250 26 13 7.0 3.8
17500 -21.7 -7.1 260 29 15 7.7 4.2 | -22.3 -8.1 250 25 13 7.0 3.9
17000 -20.5 -4.9 260 28 14 7.5 4.1 | -21.3 -6.3 245 25 13 7.2 4.0
16500 -19.5 -3.1 260 26 14 7.2 4.0 | -20.2 -4.4 245 25 13 7.5 4.1
16000 -18.4 -1.1 265 25 13 7.2 4.0 | -19.1 -2.4 245 24 12 7.5 4.1
15500 -17.4 0.7 265 23 12 6.6 3.6 | -18.0 -0.4 245 23 12 7.5 4.1
15000 -16.4 2.5 260 22 11 6.6 3.6 | -16.8 1.8 240 23 12 7.6 4.1
14500 -15.4 4.3 260 20 11 6.7 3.7 | -15.8 3.6 240 22 11 7.2 4.0
14000 -14.4 6.1 260 20 10 6.7 3.7 | -14.7 5.5 240 22 11 7.3 4.0
13500 -13.4 7.9 260 19 10 7.0 3.8 | -13.6 7.5 240 21 11 7.1 3.9
13000 -12.4 9.7 260 19 10 7.1 3.9 | -12.6 9.3 240 21 11 7.1 3.9
12500 -11.4 11.5 260 18 9 6.6 3.6 | -11.6 11.1 240 21 11 6.9 3.8
12000 -10.4 13.3 260 18 9 6.5 3.6 | -10.6 12.9 235 20 10 6.8 3.7
11500 -9.5 14.9 255 18 9 6.2 3.4 | -9.6 14.7 235 19 10 7.0 3.8
11000 -8.6 16.5 255 17 9 6.1 3.4 | -8.5 16.7 235 19 10 7.2 3.9
10500 -7.8 18.0 255 17 9 5.7 3.1 | -7.5 18.5 235 18 9 5.9 3.3
10250 -7.4 18.7 255 17 9 4.9 2.7 | -7.1 19.2 230 18 9 4.6 2.5
10000 -7.0 19.4 255 17 9 7.0 3.8 | -6.8 19.8 230 17 9 8.0 4.4
9750 -6.4 20.5 255 17 9 8.3 4.6 | -6.0 21.2 230 16 8 9.5 5.2
9500 -5.8 21.6 250 16 8 6.6 3.6 | -5.5 22.1 225 16 8 6.5 3.6
9250 -5.4 22.3 250 16 8 6.2 3.4 | -5.0 23.0 225 15 8 5.9 3.2
9000 -4.9 23.2 250 16 8 6.6 3.6 | -4.6 23.7 225 15 7 7.3 4.0
8750 -4.0 24.8 245 14 7 6.5 3.6 | -4.0 24.8 220 14 7 7.8 4.3
8500 -3.5 25.7 240 13 7 6.3 3.4 | -3.0 26.6 215 12 6 7.3 4.0
8250 -3.0 26.6 240 13 6 7.3 4.0 | -2.4 27.7 215 11 6 6.4 3.5
8000 -2.5 27.5 240 13 7 6.9 3.8 | -2.0 28.4 220 10 5 7.2 4.0
7750 -2.0 28.4 235 12 6 5.7 3.1 | -1.4 29.5 215 9 5 8.5 4.6
7500 -1.6 29.1 230 11 6 6.0 3.3 | -0.8 30.6 215 8 4 8.7 4.8
7250 -1.2 29.8 225 10 5 5.8 3.2 | -0.2 31.6 215 7 4 6.6 3.6
7000 -0.7 30.7 215 9 5 6.1 3.3 | 0.3 32.5 215 6 3 7.7 4.2
6750 -0.3 31.5 210 8 4 6.4 3.5 | 1.0 33.8 210 6 3 10.9 6.0
6500 0.2 32.4 200 7 4 6.3 3.5 | 1.8 35.2 210 6 3 9.8 5.4
6250 0.6 33.1 180 6 3 6.1 3.3 | 2.5 36.5 210 5 3 10.0 5.5
6000 1.1 34.0 155 6 3 6.6 3.6 | 3.2 37.8 205 4 2 8.5 4.7
5750 1.7 35.1 160 6 3 9.9 5.4 | 3.8 38.8 210 4 2 10.0 5.5
5500 2.6 36.7 145 5 3 16.9 9.3 | 5.3 41.5 210 3 1 35.9 19.7
5250 M M M M M M M | M M M M M M M
5000 M M M M M M M | M M M M M M M

03/20/2023 at 1500 MDT | 03/20/2023 at 1800 MDT
|
CAPE... +120.9 LI... -0.0 | CAPE... +76.8 LI... +0.5
CINH... -3.8 K Index... +22.2` | CINH... -2.6 K Index... +23.3`
|
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
--------------------------------------------------------------------------------
50000 -57.0 -70.6 270 48 25 1.7 0.9 | -56.8 -70.2 275 52 27 0.8 0.5
45000 -54.5 -66.1 270 54 28 1.7 0.9 | -55.5 -67.9 275 56 29 0.8 0.5
40000 -54.4 -65.9 270 67 35 -0.3 -0.2 | -54.3 -65.7 270 65 33 0.8 0.4
38000 -54.6 -66.3 270 72 37 -0.4 -0.2 | -54.0 -65.2 270 68 35 -0.9 -0.5
36000 -54.9 -66.8 265 70 36 -0.4 -0.2 | -54.4 -65.9 265 66 34 -0.7 -0.4
34000 -55.1 -67.2 265 69 36 -0.5 -0.3 | -54.8 -66.6 265 64 33 -0.8 -0.4
32000 -52.5 -62.5 260 68 35 5.7 3.1 | -52.2 -62.0 260 63 32 5.8 3.2
30000 -49.1 -56.4 260 67 34 5.7 3.1 | -48.7 -55.7 260 62 32 5.9 3.2
29000 -47.5 -53.5 260 63 32 5.4 2.9 | -47.2 -53.0 260 57 29 4.6 2.5
28000 -45.8 -50.4 260 56 29 5.4 2.9 | -45.8 -50.4 260 50 26 4.6 2.5
27000 -44.2 -47.6 255 50 26 5.4 2.9 | -44.4 -47.9 255 44 22 4.6 2.5
26000 -41.8 -43.2 255 44 23 8.4 4.6 | -42.8 -45.0 250 38 20 8.8 4.8
25000 -39.3 -38.7 250 42 22 8.5 4.6 | -39.5 -39.1 245 37 19 8.7 4.8
24000 -36.7 -34.1 250 40 21 8.5 4.6 | -36.9 -34.4 240 36 18 8.7 4.8
23000 -34.2 -29.6 250 38 20 8.3 4.6 | -34.3 -29.7 235 35 18 8.8 4.8
22000 -31.7 -25.1 250 36 19 8.3 4.6 | -31.7 -25.1 235 33 17 8.8 4.8
21000 -29.3 -20.7 245 35 18 8.4 4.6 | -29.0 -20.2 235 32 16 8.9 4.9
20000 -26.9 -16.4 245 33 17 7.5 4.1 | -26.5 -15.7 230 30 15 8.3 4.5
19500 -25.8 -14.4 240 32 16 7.5 4.1 | -25.3 -13.5 230 29 15 8.3 4.5
19000 -24.7 -12.5 240 31 16 7.5 4.1 | -24.1 -11.4 230 28 14 8.3 4.5
18500 -23.6 -10.5 240 30 15 7.5 4.1 | -22.8 -9.0 230 27 14 8.3 4.6
18000 -22.5 -8.5 235 29 15 7.7 4.2 | -21.6 -6.9 230 26 13 7.9 4.3
17500 -21.3 -6.3 235 29 15 7.7 4.2 | -20.5 -4.9 230 26 13 7.7 4.2
17000 -20.2 -4.4 235 28 15 7.6 4.2 | -19.3 -2.7 230 25 13 7.7 4.2
16500 -19.1 -2.4 235 28 14 7.3 4.0 | -18.2 -0.8 225 24 13 7.5 4.1
16000 -18.0 -0.4 235 28 14 7.4 4.0 | -17.1 1.2 225 24 12 7.6 4.2
15500 -16.9 1.6 235 27 14 7.2 3.9 | -16.0 3.2 225 23 12 7.1 3.9
15000 -15.9 3.4 235 27 14 7.2 3.9 | -15.0 5.0 225 23 12 7.2 3.9
14500 -14.8 5.4 235 27 14 7.2 4.0 | -13.9 7.0 225 23 12 7.0 3.8
14000 -13.7 7.3 230 26 13 7.3 4.0 | -12.9 8.8 225 23 12 6.9 3.8
13500 -12.7 9.1 230 25 13 7.0 3.9 | -11.9 10.6 225 23 12 6.8 3.7
13000 -11.7 10.9 230 24 12 7.0 3.8 | -10.9 12.4 225 23 12 6.8 3.7
12500 -10.6 12.9 230 23 12 6.9 3.8 | -9.9 14.2 225 23 12 6.6 3.6
12000 -9.6 14.7 230 21 11 6.9 3.8 | -9.0 15.8 225 22 11 6.5 3.6
11500 -8.6 16.5 225 20 10 7.0 3.8 | -8.0 17.6 225 22 11 6.5 3.5
11000 -7.6 18.3 225 19 10 7.1 3.9 | -7.1 19.2 220 21 11 6.4 3.5
10500 -6.6 20.1 220 17 9 6.2 3.4 | -6.2 20.8 220 21 11 5.8 3.2
10250 -6.2 20.8 220 17 9 5.2 2.8 | -5.8 21.6 220 20 10 4.8 2.6
10000 -5.8 21.6 220 16 8 7.7 4.2 | -5.4 22.3 220 20 10 6.5 3.6
9750 -5.1 22.8 220 15 8 9.2 5.0 | -4.9 23.2 220 19 10 7.8 4.3
9500 -4.5 23.9 220 15 7 7.1 3.9 | -4.3 24.3 220 19 10 6.7 3.7
9250 -4.0 24.8 215 14 7 6.3 3.5 | -3.9 25.0 220 18 9 6.3 3.4
9000 -3.6 25.5 215 13 7 7.8 4.3 | -3.4 25.9 220 17 9 6.6 3.6
8750 -2.4 27.7 215 12 6 6.8 3.7 | -2.9 26.8 220 16 8 7.0 3.8
8500 -1.9 28.6 215 12 6 6.3 3.5 | -1.9 28.6 215 14 7 7.3 4.0
8250 -1.5 29.3 215 11 6 7.8 4.3 | -1.4 29.5 215 13 7 6.5 3.5
8000 -0.8 30.6 210 10 5 8.2 4.5 | -0.9 30.4 215 12 6 6.1 3.3
7750 -0.3 31.5 210 10 5 6.9 3.8 | -0.5 31.1 215 11 6 6.8 3.7
7500 0.2 32.4 210 9 4 7.9 4.3 | 0.0 32.0 215 10 5 7.1 3.9
7250 0.7 33.3 210 8 4 5.2 2.9 | 0.5 32.9 215 9 5 5.8 3.2
7000 1.1 34.0 215 7 4 7.3 4.0 | 1.0 33.8 215 8 4 6.7 3.7
6750 1.9 35.4 215 7 4 11.3 6.2 | 1.5 34.7 215 7 4 8.7 4.7
6500 2.6 36.7 215 6 3 10.4 5.7 | 2.1 35.8 210 7 3 7.9 4.3
6250 3.4 38.1 215 6 3 9.0 4.9 | 2.7 36.9 210 6 3 9.2 5.0
6000 4.1 39.4 215 6 3 11.1 6.1 | 3.5 38.3 205 4 2 11.2 6.1
5750 5.2 41.4 220 5 3 18.9 10.3 | 4.3 39.7 200 3 2 11.0 6.1
5500 6.3 43.3 220 5 2 4.0 2.2 | 5.1 41.2 200 2 1 12.3 6.7
5250 M M M M M M M | M M M M M M M
5000 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 Walker Field in Grand
Junction, Colorado at

North Latitude: 39 deg 07 min 00.001 sec
West Longitude: 108 deg 31 min 59.998 sec
Elevation: 4839 feet (1475 meters)

and may not be representative of other areas along the Western Slope of
Colorado. 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. Comments and suggestions are welcome and should
be directed to one of the addresses or phone numbers shown at the bottom of this
page. To expedite a response to comments, be sure to mention your interest in
the soaring forecast.

DEFINITIONS:

CAPE (Convective Available Potential Energy) - An integrated measure of the
energy available for convective development, also known as the positive
area on a thermodynamic diagram. Units are Joules per kilogram. Larger
values are indicative of greater instability and the possibility of
stronger convective activity, including thunderstorms. Values around or
greater than 1000 suggest the possibility of severe weather should
convective activity develop.

CINH (Convective Inhibition) - An integrated measure of the amount of energy
needed to initiate convective activity, also known as the negative area on
a thermodynamic diagram. Units are Joules per kilogram. The more negative
this number, the more energy is required to initiate convection. This
inhibitive energy can be overcome through surface heating, cooling aloft,
lifting mechanisms (orographic, frontal, gravity waves, etc.)

Convective Condensation Level - The height to which an air parcel possessing the
average saturation mixing ratio in the lowest 4000 feet of the airmass,
if heated sufficiently from below, will rise dry adiabatically until it
just becomes saturated. It estimates the base of cumulus clouds that are
produced by surface heating only.

Convection Temperature (ConvectionT) - The surface temperature required to make
the airmass dry adiabatic up to the given level. It can be considered a
"trigger temperature" for that level.

Freezing Level - The height where the temperature is zero degrees Celsius.

Height of Stable Layer - The height (between 12,000 and 18,000 feet above
mean sea level) where the smallest lapse rate exists. The location and
existence of this feature is important in the generation of mountain
waves.

K Index - A measure of stability which combines the temperature difference
between approximately 5,000 and 18,000 feet above the surface, the amount
of moisture at approximately 5,000 feet above the surface, and a measure
of the dryness at approximately 10,000 feet above the surface. Larger
positive numbers indicate more instability and a greater likelihood of
thunderstorm development. One interpretation of K index values regarding
soaring in the western United States is given in WMO Technical Note 158
and is reproduced in the following table:

below -10 no or weak thermals
-10 to 5 dry thermals or 1/8 cumulus with moderate thermals
5 to 15 good soaring conditions
15 to 20 good soaring conditions with occasional showers
20 to 30 excellent soaring conditions, but increasing
probability of showers and thunderstorms
above 30 more than 60 percent probability of thunderstorms

Lapse Rate - The change with height of the temperature. Negative values indicate
inversions.

Lifted Condensation Level - The height to which an air parcel possessing the
average dew point in the lowest 4000 feet of the airmass and the forecast
maximum temperature must be lifted dry adiabatically to attain saturation.

Lifted Index (LI) - The difference between the environmental temperature at a
level approximately 18,000 feet above the surface and the temperature of
an air parcel lifted dry adiabatically from the surface to its lifted
condensation level and then pseudoadiabatically thereafter to this same
level. The parcel`s initial temperature is the forecast maximum
temperature and its dew point is the average dew point in the lowest 4000
feet of the airmass. Negative values are indicative of instability with
positive values showing stable conditions.

Lift Rate - An experimental estimate of the strength of thermals. It is
computed the same way as the maximum rate of lift but uses the actual
level rather than the maximum height of thermals in the calculation.
Also, none of the empirical adjustments based on cloudiness and K-index
are applied to these calculations.

Maximum Height of Thermals - The height where the dry adiabat through the
forecast maximum temperature intersects the environmental temperature.

Maximum Rate of Lift - An estimate of the maximum strength of thermals. It
is computed from an empirical formula which combines the expected maximum
height of thermals with the difference in the environmental temperatures
between the maximum height of thermals and the temperature 4,000 feet
above the ground. After this computation, further empirical adjustments
are made based on the value of the K-index and the amount and opacity of
middle and high level cloudiness expected between the time of trigger
temperature and the time of overdevelopment.

Middle/High Clouds - The amount and opacity of middle (altostratus, altocumulus)
or high (cirrus, cirrostratus, cirrocumulus) clouds. Broken means that
between 60% and 90% of the sky is covered by the cloud, with overcast
conditions occurring when more than 90% of the sky is covered by the cloud.
Thin implies that the clouds are predominantly transparent, meaning that
some sunlight is reaching the ground, in contrast to opaque which suggests
that little sunlight is reaching the ground.

Potential Height of Wave - The minimum of the following two heights:
1. Level above the height of stable layer (or 14,000 feet if none exists)
where the wind direction changes by 30 degrees or more
2. Level above the height of stable layer (or 14,000 feet if none exists)
where the wind speed no longer increases with height

PVA/NVA - Positive vorticity advection (PVA)/negative vorticity advection (NVA)
on the 500 millibar isobaric surface (approximately 18,000 feet above mean
sea level). Weak PVA has been shown to assist in mountain wave soaring.

Soaring Window - The time between the time the trigger temperature is reached
and the time of overdevelopment.

Thermal Index - The difference between the environmental temperature and the
temperature at a particular level determined by following the dry adiabat
through the forecast maximum temperature up to that level. Negative values
are indicative of thermal lift.

Thermal Soaring Index - An adjective rating (for sailplanes) based on the
computed maximum rate of lift, and the wind speed and middle and high
cloud cover expected during the soaring window (the time of the trigger
temperature and the time of overdevelopment) according to the following:

Maximum rate of lift Adjective Rating
>= 800 fpm Excellent
>= 400 and < 800 fpm Good
>= 200 and < 400 fpm Fair
< 200 fpm Poor

Time of Overdevelopment - The time one or more of the following phenomena,
which essentially shut off thermal lift, is expected to occur:
1. formation of broken to overcast convective cloud cover
2. formation of scattered to numerous downbursts
3. initiation of widespread precipitation

Time of Trigger Temperature - The time the surface temperature is expected to
reach the trigger temperature.

Trigger Temperature - The surface temperature required to make the first 4000
feet of the atmosphere dry adiabatic.

Wave Soaring Index - An empirical, adjective rating (for sailplanes) which
attempts to combine a variety of phenomena important in mountain wave
soaring into a single index number. Objective points are assigned to
these phenomena: wind speed and direction at 14,000 ft MSL, the static
stability in the 12,000-18,000 ft MSL layer, the wind speed gradient above
the stable layer, jet stream location and frontal and upper trough
movements.

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