As of Fri 14 Oct 2016 11:16:01 AM PDT, the RAP 13km grid forecast sounding for 11AM
Near Blanchard-Stewart —closest grid point available to 48.61 -122.40 | Go Back |
This is the current analysis. For future forecasts go to NOAA soundings
TI is Thermal Index and LPT is the Theoretical temperature of a Lifted Parcel of air starting at the ground.
♦Reverse Rows    
Alt
(ft)
Alt
(mb)
Dir
°az
Spd
Kts
Temp
Temp
DewPt
Thermal
Index
Local Lapse
Rate C°/1000ft

Inv 


↑↑

TS
Wind
610ft 969.6 156°
SSE
12 kts
51.8° 11° 8.3°At 0 ft AGL
TI = -0.99C° 
  0 C° 
LPT= 11 C°
705ft 966.7 156°
SSE
22 kts
51.8° 11° 8.1°At 95 ft AGL
TI = -0.962C° 
  -2.5 C° 
LPT= 10.72 C°
866ft 961.4 156°
SSE
26 kts
51.08° 10.6° At 256 ft AGL
TI = -0.918C° 
  -2.3 C° 
LPT= 10.24 C°
1132ft 952.2 158°
SSE
32 kts
50° 10° 7.6°At 522 ft AGL
TI = -0.845C° 
  -2.1 C° 
LPT= 9.45 C°
1519ft 938.7 162°
SSE
39 kts
48.56° 9.2° At 909 ft AGL
TI = -0.738C° 
  -2 C° 
LPT= 8.3 C°
1913ft 925 168°
SSE
45 kts
47.12° 8.4° 6.4°At 1303 ft AGL
TI = -0.628C° 
  -1.8 C° 
LPT= 7.12 C°
2024ft 921.3 169°
S
47 kts
46.76° 8.2° 6.3°At 1414 ft AGL
TI = -0.597C° 
  -1.8 C° 
LPT= 6.79 C°
2631ft 900.6 177°
S
53 kts
44.78° 7.1° 5.5°At 2021 ft AGL
TI = -0.428C° 
  -1.9 C° 
LPT= 4.99 C°
3317ft 877.9 183°
S
55 kts
42.44° 5.8° 4.3°At 2707 ft AGL
TI = -0.237C° 
  -1.8 C° 
LPT= 2.95 C°
4088ft 853.3 189°
S
53 kts
39.92° 4.4° 2.5°At 3478 ft AGL
TI = -0.021C° 
  -2 C° 
LPT= 0.65 C°
4190ft 850 190°
S
53 kts
39.56° 4.2° 2.2°At 3580 ft AGL
TI = 0.007C° 
  -1.9 C° 
LPT= 0.35 C°
4961ft 825.9 195°
SSW
50 kts
36.86° 2.7° 0.3°At 4351 ft AGL
TI = 0.221C° 
  -2.1 C° 
LPT= -1.94 C°
5952ft 795.6 201°
SSW
47 kts
33.08° 0.6° -0.7°At 5341 ft AGL
TI = 0.495C° 
  -1.9 C° 
LPT= -4.89 C°
7074ft 762.3 207°
SSW
47 kts
29.3° -1.5° -1.6°At 6464 ft AGL
TI = 0.808C° 
  -1.9 C° 
LPT= -8.23 C°
8337ft 726.2 211°
SSW
49 kts
24.98° -3.9° -4.1°At 7727 ft AGL
TI = 1.16C° 
  -1.9 C° 
LPT= -11.99 C°
9289ft 700 213°
SSW
51 kts
21.74° -5.7° -6.1°At 8678 ft AGL
TI = 1.425C°LCL↑ 
Cloudbase
≈ 9449 ft
stablecondUn


From 610 feet to 9289 feet, the average lapse rate = -1.9 C° /1000 ft (-3.4F°/1000 ft) or -6.3C°/km
Standard lapse rate is 5.4F°/1000 feet (3C°/1000ft). By itself, lapse rate doesn't tell us whether the atmosphere is stable or unstable, but in general, larger negative numbers indicate instability, and when the lapse rate is positive, we have an inversion.
Conditional instability bounds are -9.98C°/1km ↔ -4.0C°/1km which comes to -3.12C°/1000ft ↔ -1.22C°/1000ft.

The Top of the Boundary Layer is also the Mixing Layer and is the level at which the Thermal Index = 0 See DrJack's discussion or Richard Kellerman's pages.

Statcounter