(no subject)
Forecasts/Vertical Profile
x 


profil.btv@noaa.gov
10:35 AM (6 minutes ago)

to undisclosed recipients
Vertical Temperature Profile across Northern Vermont
as of  11/29/12 15 Z

Site     Elevation       Temp    Wind            Location

KBTV      341FT          31F     200  5 KT       S. Burlington
KCES      486FT          25F      40  2 KT       Jeffersonville
KNSH      781FT          28F     260  3 KT       Nashville
KUHL     1056FT          28F     230  3 KT       Underhill
KUND     1309FT          27F     160  2 KT       Underhill
KSTW     1824FT          25F     200 14 KT       Stowe Resort
KBVL     2100FT          23F     300  3 KT       Bolton Valley
KMMS    Missing          --F
KMMN     3950FT          16F     260 33 KT       Mt. Mansfield

Estimated Lapse Rate in lowest 1.1 km is 7.6 C/KM.
Estimated Surface - 1.1km Bulk Shear is 30 KT at  268 Degrees  (0.014 s^-1).
Estimated Froude Number is 1.86.
Estimated LCL Height = 3190.0 FT.

BTV4 Froude Number for the greens
Forecasts/Froude
x 


froude.btv@noaa.gov
7:05 AM (3 hours ago)

to undisclosed recipients
Model run: BTV_GRID_D2D_BTV4_20121129_0600
Using the MB925 to MB875 layer.

Date   Time        Wind
Day mm/dd hhZ Frd# DDFF
=== ===== === ==== ====
Thu 11/29 06Z 1.24 2914
Thu 11/29 09Z 1.50 2812
Thu 11/29 12Z 0.81 2714
Thu 11/29 15Z 0.71 2718
Thu 11/29 18Z 1.03 2616
Thu 11/29 21Z 1.64 2618
Fri 11/30 00Z 1.51 2818
Fri 11/30 03Z 0.64 2814
Fri 11/30 06Z 0.32 3104
Fri 11/30 09Z 0.21 3005
Fri 11/30 12Z 0.10 3203
Fri 11/30 15Z 0.05 3101
Fri 11/30 18Z 0.06 1702
Fri 11/30 21Z 0.03 1805
Sat 12/01 00Z 0.03 1906
Sat 12/01 03Z 0.06 1808
Sat 12/01 06Z 0.07 1908
Sat 12/01 09Z 0.09 2110
Sat 12/01 12Z 0.07 2209
Sat 12/01 15Z 0.05 2308
Sat 12/01 18Z 0.04 2209

Froude < 1 Flow is subcritical/slow moving/blocked.
         Upslope clouds/precip falls upwind of mtn crest. Gap winds possible.
Froude ~~ 1 or 1.5 Flow is critical.
         With strong winds, Mountain waves/downslope winds possible.
Froude >> 1.5 Flow is supercritical/unblocked(rapid flow).
         Air flows freely over terrain.
         Precip falls close to mountain ridge crests and on lee side.