UPS Meteorology AMDAR

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UPS Meteorology - AMDAR

• Forecasting Aid WVSS Data
• Fog
• Winter Precipitation Types
• Diagnostic Aid/Case Studies
• Document Events
• Develop New Forecast Techniques

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Aircraft N411UP WVSS-II installation pictures at
Goodrich during C check in May 2004.
Air Sampler (View looking inboard)
System Electronics Box (SEB) (View looking
outboard)
Air Sampler (View looking outboard)
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Fog Forecasting

• Moisture Increasing with Height
• Inversion/Light Winds

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Fog Forecasting
3 hours later 0812z RVR 1000-2800 1254z RVR
600-1000
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Fog Forecasting SDF 29 Mar 05

Moisture decreasing with height Favors shallow
ground fog
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Fog Forecasting SDF 29 Mar 05

• AC362 TYS-gtSDF starting at 29-Mar-2005 034700
  with 85 obs
• descent sounding ending at 29-Mar-2005 042500
• S F HHMM lat/lon Alt wd/ws t
  / td ( RH ) code
• 0 0 0421 38.0370/-85.7060 3300 338/020
  9.0/-1.10 (48.9) 3930
• 2 0 0421 38.0150/-85.7030 3400 338/020 8.6
• 0 0 0422 38.0600/-85.7150 2840 340/022
  10.3/-0.20 (47.9) 4130
• 0 0 0422 38.0820/-85.7220 2400 339/022
  11.5/0.000 (45.0) 4130
• 2 0 0423 38.1000/-85.7270 2040 331/022
  12.2/0.200 (43.5) 4130
• 0 0 0424 38.1150/-85.7340 1710 324/020
  13.0/0.700 (42.8) 4230
• 0 0 0424 38.1320/-85.7370 1360 328/018
  13.8/0.800 (41.1) 4230
• 2 0 0425 38.1640/-85.7490 700 279/003
  11.5/4.700 (62.9) 5430
• 0 0 0425 38.1720/-85.7510 580 130/002
  11.0/5.500 (68.9) 5730

The First Descent report at 0425z confirmed the
model forecasts of a sharp decrease in moisture
with height. Furthermore, there was a 3C
inversion with 18 knots of wind, indicating still
mixy conditions, helping to mix the drier air
down to the surface.
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Fog Forecasting SDF 29 Mar 05

• Earlier in the day rain had occurred (0.34),
  followed by clearing late in the day.
• Using the UPS Fog Forecasting method, the
  Crossover temperature was 8.3C, and with expected
  clear skies, calm winds, and a forecast low
  temperature of 4C, fog was of some concern.
• Soil temperatures were on the warm side (9C), and
  BUFKIT ETA output showed good dry advection just
  off the surface until about 04z, followed by
  decoupling and possible fog conditions by around
  07z.
• Based on the model forecast of moisture
  decreasing with height, UPS meteorologists
  forecast ground fog with no operational impact at
  SDF where, due to runway construction, visibility
  below 3 miles would have caused significant
  delays to our Next Day Air inbounds.

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Fog Forecasting SDF 29 Mar 05
LOU (Louisville Bowman Field) did report ¼ mile
in ground fog, which was patchy across the city,
especially in low-lying locations. SDF never
dropped below a sector visibility of 2 ½ miles.
SDF 0356 00000KT 7SM MIFG CLR 08/07 A2978 REMRK
A02VIS W 2 1/2 SLP084 T00780072 SDF 0456 00000KT
6SM MIFG CLR 07/07 A2979 REMRK AO2 SLP087
T00720067 401170067 SDF 0556 10003KT 4SM BR CLR
05/04 A2979 REMRK AO2 SLP090 T00500044 10106
20050 51012 SDF 0656 00000KT 5SM BR CLR 06/06
A2981 REMRK AO2 SLP096 T00560056 SDF 0756 00000KT
6SM BR CLR 05/04 A2982 REMRK AO2 SLP100 T00500044
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Winter Precipitation Types

• SDF 15-16 Feb 2003

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RAIN
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KSDF 151843Z 06015KT 2 1/2SM RA BR OVC013 01/M01
A3001 RMK AO2 RAB30
RAIN
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METAR KSDF 160156Z 05009G17KT 5SM -PL BR OVC020
M01/M04 A3009 RMK AO2 FZDZE55PLB55 SLP192 P0001
T10111039
FZRA, FZDZ, PL
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KSDF 160556Z 04009KT 4SM -PL BR OVC018 M03/M04
A3006 KSDF 160456Z 04010KT
6SM -PL BR OVC020 M02/M04 A3007
ICE PELLETS
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Diagnostic Aid/Case Studies

• Document Events
• What happened?
• Why did it happen?
• Develop New Forecast Techniques
• Were there clues in the model output?
• If so, develop forecast techniques to predict the
  next event.

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SVR Turbulence Incident

• 2315z 11Nov02 Approximately 40 nm East of
  Louisville.
• FL 190-225 Continuous moderate, occasional
  severe.
• Diverted for maintenance inspection.
• Water vapor aircraft with good data.
• AIRMET for moderate turbulence FL 180-370 due to
  windshear in vicinity of upper level jet stream.

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(No Transcript)
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METAR KSDF 112356Z 33012KT 10SM SCT250 11/06
A3007 RMK AO2 SLP182 T01060056 10161 20106 53033
KLOU 112353Z 34008KT 10SM CLR 11/03 A3007 RMK
AO2 SLP183 T01110033 10156 20111 53035

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Mod-SVR Turbulence
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• P_alt mb t/td w_dir/w_spd Bng/Rng
  from gnd pt
• (ft) (C) (kts) (nm)
• 14301 588 -13.7/-23.5 246/031 89/017
  2301 UTC
• 15499 560 -16.3/-28.1 249/032 91/019
  2302 UTC
• 16670 534 -19.2/-32.0 247/035 93/022
  2302 UTC
• 17759 511 -21.3/-31.8 249/043 96/024
  2303 UTC
• 18291 500 -21.9/-31.3 247/050 98/025
  2303 UTC
• 18799 490 -22.7/-31.1 246/057 100/026
  2303 UTC
• 19741 471 -24.5/-32.1 246/074 104/027
  2303 UTC
• 21099 445 -25.2/-27.0 239/079 109/028
  2303 UTC
• 22192 425 -26.7/-28.1 236/090 113/029
  2303 UTC
• 22700 415 -26.7/-29.4 238/116 116/030
  2304 UTC
• 22890 412 -27.2/-30.0 236/118 119/031
  2304 UTC
• 22959 411 -27.6/-29.2 236/116 122/033
  2304 UTC
• 23018 410 -27.3/-28.0 236/115 125/034
  2305 UTC
• 23428 403 -29.2/-29.2 237/116 127/035
  2305 UTC
• 23576 400 -29.4/-29.4 236/115 129/036
  2305 UTC
• 23911 394 -30.2/-30.2 234/112 130/037
  2306 UTC

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SDF Brief Ice Pellet Event 0905Z 16 Nov 00
A brief Ice pellet event affected UPS operations
between 0905-0917Z on 16Nov00. No deicing was
needed as the intensity was very light and the
temperatures were above freezing so that it
melted.
KSDF METAR 160956Z 19010KT 10SM FEW055 SCT065
BKN085 06/01 A2992 RMK AO2 RAB05E35PLB05E17
SLP134 P0000 T00560006
KSDF METAR 160856Z 16005KT 10SM FEW080
OVC120 04/M01 A2995 RMK AO2 SLP143 T00441011
56014
KSDF METAR 160756Z 16006KT 10SM BKN120
04/M01 A2997 RMK AO2 SLP151 T00391011
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Model Output -RA
FOUM65 KWNO 160000 OUTPUT FROM NGM 00Z NOV 16
00 TTPTTR1R2R3 VVVLI PSDDFF HHT1T3T5 SDF//502644
-0117 182009 48050001 06000583766 -0516 152020
49040303 12000727164 00712 132116
48020401 18000609078 00206 122214
47080001 24000845525 -0710 112415
44070100 30000683317 -0116 132914
39049998 36000733916 -0317 143016
32009596 42000664110 -1818 172909
27009493 48000623511 -2221 213113 32009493
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SDF ESC NGM MOS GUIDANCE 11/16/00 0000 UTC DAY
/NOV 16 /NOV 17 /NOV 18 HOUR 06 09 12 15 18 21 00
03 06 09 12 15 18 21 00 03 06 09 12 MX/MN
50 33 41
25 TEMP 40 40 39 44 47 47 43 42 39 36 34 35 39 40
35 31 29 28 27 DEWPT30 31 32 35 38 38 37 35 32 30
29 26 24 23 22 22 22 22 22 CLDS SC BK OV OV OV OV
OV OV OV OV OV OV OV BK CL CL CL CL SC WDIR 17 19
21 23 25 25 26 27 29 30 30 30 30 30 31 30 30 31
19 WSPD 06 09 11 14 15 13 12 11 12 11 11 12 12
11 09 08 05 03 02 POP06 10 47 46 9
11 7 5 1 4 POP12
59 20 10 5 QPF
0/ 1/ 1/1 0/ 0/0 0/ 0/0 0/
0/0 TSV06 0/ 4 3/ 4 4/ 4 3/ 0 1/ 3 0/ 0
0/ 0 0/ 0 0/ 5 TSV12 1/ 7 5/ 4
1/ 1 0/ 0 PTYPE R R R R R R R
R R S S S S S S POZP 0 0 0
0 2 4 3 3 0 0 0 0 0 1
0 POSN 0 3 3 0 0 0 0 11 36 65 73 91
91 88 90 SNOW 0/ 0/ 0/0 0/
0/0 0/ 0/1 0/ 0/0 CIG 7 7 6 5 4
4 4 4 5 5 6 5 7 VIS 5 5 5 5 5
5 5 5 5 5 5 5 5 OBVIS N N N N N
N N N N N N N N
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However, a Water Vapor Descent report showed a
deep layer of dry air with wetbulb temperatures
below 0C.
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A few hours later at 0913Z, a Water Vapor Ascent
report showed that between 800-900 mb the wetbulb
temperature was still below freezing.
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ILN (Wilmington, Ohio) 12Z Raob, which shows a
very similar temperature and moisture structure.
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Santa Ana Winds
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Pressure Gradient, No Wave Strongest winds Below
the Inversion
Cajon Pass
Boundary Layer winds 030-060 degrees
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Jet Core West of ONT, Weak or no Santa Ana event
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Jet Core East of ONT, Moderate to Strong Santa
Ana event Mountain Wave
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Tropopause
Jet
Tropopause
Jet Stream Front
Mountain Level 10,000 Ft
Ground Level
BUR ONT PHX
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Mountain Wave Strongest Wind in and near Stable
Layer
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Santa Ana Winds G78KT
ONT