Download 51 47 170

3
3
3
2
3
2
3
3
3
3
3
2
3
2
3
3
00-HR Forecast Soundings
Valid 12Z - 21 Oct 2014
12Z Analysis - Today (21 Oct 2014)
51
47
170
3
3
3
2
3
2 3
2
2
3
2
3
3
3
3
3
3
2
3
2 3
2
2
3
2
3
3
3
12-HR Forecast Soundings
Valid 00Z - 22 Oct 2014
12-HR Forecast – Valid 00Z - 22 Oct 2014
60
46
160
2
3
3
3
2
2
3
2
3
3
2
3
2
3
3
3
2
2
3
2
3
3
2
3
24-HR Forecast Soundings
Valid 12Z - 22 Oct 2014
24-HR Forecast – Valid 12Z - 22 Oct 2014
43
42
220
Forecast for Huntsville AL
Today: Mostly sunny. Highs in the lower 70s. Light winds becoming north around 10
mph in the afternoon.
Tonight: Clear. Lows in the lower 40s. Light winds.
Wednesday: Sunny. Highs in the upper 60s. North winds around 10 mph.
Forecast Reasoning
The Tennessee Valley is under a cold air advection regime with northwesterly to
northerly flow for the next 24-36hrs. Upper level confluence (directional conv.) and
mass pile-up due to the curvature term of the ageostrophic wind equation will keep
high pressure in place over the forecast period. The subsidence associated with
surface high pressure and upper level convergence will keep skies mostly clear
through Wednesday. A reinforcing cold front will pass through the Tennessee Valley
overnight keeping cooler and drier air in place, thus no significant chances for clouds
or precipitation over most of the region. Sunny skies will allow temperatures to
rebound into the lower 70s today prior to the passage of the reinforcing cold front.
Dewpoints behind the front are in the lower 40s, so expect temperatures to drop into
the low 40s overnight with the clear skies, light winds, and dry air in place. Stronger
cold air advection on Wednesday after the passage of the cold front will only allow
temperatures to climb into the uppr 60s despite the mostly sunny skies. Steep lowlevel lapse rates in the afternoon will promote turbulent mixing and winds speeds
climbing to around 10mph for both Today and Wednesday.