# Presentation: 602597

## UPS Meteorology - AMDAR

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

## Aircraft N411UP WVSS-II installation pictures at Goodrich during “C” check in May 2004.

- System Electronics Box (SEB) (View
- looking outboard)

- Air Sampler (View looking outboard)

- Air Sampler (View looking inboard)

## Fog Forecasting

- Moisture Increasing with Height
- Inversion/Light Winds

## Fog Forecasting

- 3 hours later...
- 0812z RVR 1000-2800
- 1254z RVR 600-1000

## Fog Forecasting – SDF 29 Mar 05

- Moisture decreasing with height
- Favors shallow ground fog

## Fog Forecasting – SDF 29 Mar 05

**AC#362 TYS->SDF starting at 29-Mar-2005 03:47:00 with 85 obs**
**	****descent sounding ending at 29-Mar-2005 04:25:00**
**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.

## 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.

## Fog Forecasting – SDF 29 Mar 05

- LOU (Louisville Bowman Field) did report 1⁄4 mile in ground fog, which was patchy across the city, especially in low-lying locations.
- SDF never dropped below a sector visibility of 2 1⁄2 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**

## Winter Precipitation Types

**  ****SDF  15-16 Feb 2003**

## RAIN

## RAIN

**KSDF 151843Z 06015KT 2 1/2SM RA BR OVC013 01/M01 A3001 RMK AO2 RAB30**

## FZRA, FZDZ, PL

**METAR KSDF 160156Z 05009G17KT 5SM -PL BR OVC020 M01/M04 A3009 RMK  AO2 FZDZE55PLB55 SLP192 P0001 T10111039  =**

## ICE PELLETS

**KSDF 160556Z 04009KT 4SM -PL BR OVC018 M03/M04 A3006=                     **
**KSDF 160456Z 04010KT 6SM -PL BR OVC020 M02/M04 A3007=**

## 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.

## 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.

## Slide 16

## METAR KSDF 112356Z 33012KT 10SM SCT250 11/06 A3007 RMK AO2 SLP182  T01060056 10161 20106 53033  =

**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=**

## Mod-SVR

**Mod-SVR**
**Turbulence**

##   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
 24360  387 -30.7/-30.7    235°/113  132°/038   2306 UTC
 24859  378 -30.6/-30.6    235°/123  134°/040   2306 UTC
 25531  367 -31.3/-31.3    233°/124  136°/042   2307 UTC
 26260  356 -33.1/-33.1    233°/124  138°/044   2307 UTC
 26870  346 -34.8/-34.8    234°/123  140°/046   2308 UTC
 28999  315 -39.5/-40.7    233°/123  152°/067   2311 UTC

**  ****(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**
** ****24360  387 -30.7/-30.7    235°/113  132°/038   2306 UTC**
** ****24859  378 -30.6/-30.6    235°/123  134°/040   2306 UTC**
** ****25531  367 -31.3/-31.3    233°/124  136°/042   2307 UTC**
** ****26260  356 -33.1/-33.1    233°/124  138°/044   2307 UTC**
** ****26870  346 -34.8/-34.8    234°/123  140°/046   2308 UTC**
** ****28999  315 -39.5/-40.7    233°/123  152°/067   2311 UTC**

## 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 RAB05E35****PLB05E17**** 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  =**

## 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 **

## 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**

## However, a Water Vapor Descent report showed a deep layer of dry air with wetbulb temperatures below 0C.

## A few hours later at 0913Z, a Water Vapor Ascent report showed that between 800-900 mb the wetbulb temperature was still below freezing. 

- A few hours later at 0913Z, a Water Vapor Ascent report showed that between 800-900 mb the wetbulb temperature was still below freezing.

## ILN (Wilmington, Ohio) 12Z Raob, which shows a very similar temperature and moisture structure. 

- ILN (Wilmington, Ohio) 12Z Raob, which shows a very similar temperature and moisture structure.

## Santa Ana Winds

**Santa Ana Winds**

## Pressure Gradient, No Wave

**Pressure Gradient, No Wave**
**Strongest winds Below the Inversion**

**Cajon Pass**

**Boundary Layer winds 030-060 degrees**

## Jet Core West of ONT, Weak or no Santa Ana event

**Jet Core West of ONT, Weak or no Santa Ana event**

## Mountain Wave

**Jet Core East of ONT, Moderate to Strong Santa Ana event**
**Mountain Wave**

## Jet

**BUR  ONT                      PHX**

**Jet**

**Tropopause**

**Tropopause**

**Jet Stream Front**

**Mountain Level – 10,000 Ft**

**Ground Level**

## Mountain Wave

**Mountain Wave**
**Strongest Wind in and near Stable Layer**

## Santa Ana Winds G78KT

**ONT**

**Santa Ana Winds G78KT**