DrJack's TIP (Thermal Index Prediction) for ARLINGTON,WA on SUN Jul 20
*************************************************************************** **
****************** SUMMARY NUMBERS - based on NWS Tmax only *****************
AM Avg. TI HEIGHTS: 3156,4022 ftMSL @TI=-4,0degF
AM Avg. Hcrit HGT : 2586 ftMSL (Max. _flat_terrain_ thermalling height)
AM HGT VARIABILITY: 1081 ft (from TI=0to+4degF)
AM Avg. Buoy/Shear: 21 (thermals may be unworkable if 5 or less)
AM Avg UPDRAFT W* : 389 fpm (subtract glider sinkrate to get vario)
PM Avg HGT CHANGE : -1706 ft @TI=+4degF
Tmax UNCERTAINTY : -3 degF (deviation of WxC Tmax from NWS forecast)
BL Max. Rel.Humid.: AM= 97% PM= 42%
AM Extensive CLOUD: Dif= -873 ft LCL= 4821 ftMSL (if Dif>0, expect OD at LCL)
PM Extensive CLOUD: Dif= -5152 ft LCL= 7429 ftMSL (if Dif>0, expect OD at LCL)
THUNDERSTORM CAPE : AM= 0 PM= 0 (if CAPE>0, thunderstorms possible)
MON AM HEIGHTS: 1974,3285 ftMSL @TI=-4,0degF & Hcrit= 1803 ftMSL
MON PM CHANGE: -966 ft @TI=+4
TUE AM HEIGHTS: 2552,3656 ftMSL @TI=-4,0degF & Hcrit= 2172 ftMSL
*************************************************************************** ****
***************** NEAREST NWS TAF FORECAST ************************************
*** description at http://www.awc-kc.noaa.gov/awc/help/taf-decode.html ***
NO TAF FORECAST from KPAE
*************************************************************************** ****
******************** THERMAL INDEX ANALYSES ***********************************
TODAY's MORNING MODEL ANALYSES at AWO @ 07/20:12Z for Sfc= 137 ftMSL
---------------------------------------------------------------------
MAPS NWS Tmax= 74 > TI=-4,0@ 3062, 3952 Hcrit= 2556 HgtVar=1394 B/S= 8 W*= 393
MAPS WxC Tmax= 71 > TI=-4,0@ 2740, 3270 Hcrit= 1914 HgtVar= 952 B/S= 7 W*= 333
MAPS AVG Tmax=72.5> TI=-4,0@ 2884, 3595 Hcrit= 2224 HgtVar=1132 B/S= 8 W*= 362
ETA NWS Tmax= 74 > TI=-4,0@ 3250, 4092 Hcrit= 2616 HgtVar= 768 B/S=35 W*= 385
ETA WxC Tmax= 71 > TI=-4,0@ 2192, 3518 Hcrit= 2015 HgtVar= 751 B/S=29 W*= 325
ETA AVG Tmax=72.5> TI=-4,0@ 2769, 3807 Hcrit= 2323 HgtVar= 753 B/S=32 W*= 355
MAPS MODEL FORECAST TIs at AWO for Sfc= 137 ftMSL
--------------------------------------------------
am NWS Tmax= 74 > TI=-4,0@ 3062, 3952 Hcrit= 2556 HgtVar=1394 B/S= 8 W*= 393 MAPSanl:07/20:12Z
pm NWS Tmax= 74 > Change@TI=+4: -904 (-4.1F) MAPS10h:07/21:00Z
ETA MODEL FORECAST TIs at AWO for Sfc= 137 ftMSL
-------------------------------------------------
am NWS Tmax= 74 > TI=-4,0@ 3250, 4092 Hcrit= 2616 HgtVar= 768 B/S=35 W*= 385 ETAanal:07/20:12Z
pm NWS Tmax= 74 > Change@TI=+4: -2509 (-15.8F) ETA12hr:07/21:00Z
MONam NWS Tmax= 75 > TI=-4,0@ 1974, 3285 Hcrit= 1803 HgtVar=1429 B/S=18 W*= 309 ETA24hr:07/21:12Z
MONpm NWS Tmax= 75 > Change@TI=+4: -966 (-4.8F) ETA36hr:07/22:00Z
TUEam wxc Tmax= 70 > TI=-4,0@ 2552, 3656 Hcrit= 2172 HgtVar=1250 B/S=31 W*= 341 ETA48hr:07/22:12Z
*************************************************************************** ****
**************** TODAY's *AM* TI LISTING using MAPSanal+NWStmax ***************
20-Jul-2008 12 UTC TI report from AWO MAPSanl upper air data.
Forecast max Temp.: 74.0 F
Forecast max VirtT: 76.2 F
Forecast sfc VirtT: 76.3 F
Surface elev Temp: 48.7 F
Surface elev VirtT: 50.9 F
Surface elevation: 137 ftMSL SfcAdjust:1
Station elevation: 344 ftMSL
Lowest elevation: 137 ftMSL
Lowest elev Temp: 48.7 F
Lowest elev VirtT: 50.9 F
Ford est. base of any clouds: 6523 ftMSL
Lowest elev windspeed: 1 kt
Mixing Layer windspeed: 9 kt
Convection overcast height: None ftMSL
Convection TI=0 height: 3948 ftMSL
Height *TI* Wind TI=0 Tv ------ Temperature Profile Plots ------
ftMSL degF deg kts trig degF o=Tv .=DewPt *=Adiabat 2.1 degF/division
----- ---- ------- ---- . ---- ---------------------------------------------
18000 36.8 111 | 17.5 * . o
17500 36.1 110 | 19.5 * . o
17000 35.3 109 | 21.4 * . o
16500 34.6 283 15 109 | 23.3 *. o
16000 33.6 108 | 25.0 .* o
15500 32.5 106 | 26.6 . * o
15000 31.4 291 12 105 | 28.2 . * o
14500 30.3 104 | 29.7 . * o
14000 29.1 103 | 31.2 . * o
13500 28.0 306 11 102 | 32.7 . * o
13000 26.9 101 | 34.3 . * o
12500 25.8 100 | 35.9 . * o
12000 24.8 317 12 99 | 37.5 . * o
11500 23.8 98 | 39.3 . * o
11000 23.0 318 13 97 | 41.1 . * o
10500 22.5 319 14 96 | 43.3 . * o
10000 21.5 326 14 96 | 45.0 . * o
9500 20.3 326 15 94 | 46.5 . * o
9000 18.9 329 16 93 | 47.7 . * o
8500 17.0 91 | 48.4 . * o
8000 14.8 330 17 89 | 48.9 . * o
7500 12.8 330 17 87 | 49.7 . * o
7000 11.2 329 15 85 | 50.7 . * o
6500 9.0 328 13 83 | 51.2 . * o
6000 6.5 327 12 81 | 51.4 . * o
5500 4.4 328 12 78 | 51.9 . * o
5000 3.1 329 13 77 | 53.2 . * o
4500 2.0 326 14 76 | 54.9 . *o
4000 0.2 323 13 74 | 55.8 . o
3500 -1.9 311 12 72 | 56.3 . o*
3000 -4.3 295 12 70 | 56.6 . o *
2500 -9.5 294 10 65 | 54.1 . o *
2000 -13.1 294 12 61 | 53.1 . o *
1500 -14.8 301 11 59 | 54.1 . o *
1000 -15.1 308 7 59 | 56.5 . o *
500 -17.1 278 3 57 ! 57.1 . o *
CLOUD FORMATION PARAMETERS from AM sounding
--------------------------------------------------------------
Expect extensive cloud formation at LCL when LCLdiff positive
or over mountains when LCL is (approx) below mt top
(1stLine=_no_warming, 2ndLine=_with_warming)
Thunderstorms possible when CAPE is positive
BLmaxRH LCLdiff LCL CCL CAPE Zsfc= 137 TI=0@ 3948
97 -873 4821 14419 0
53 -3224 7172 14419 0
*************************************************************************** ****
**************** TODAY's *PM* TI LISTING using MAPSpm+NWStmax *****************
*NB* TI values below pm model-predicted mixing height are meaningless !
21-Jul-2008 00 UTC TI report from AWO MAPS10h upper air data.
Forecast max Temp.: 74.0 F
Forecast max VirtT: 75.9 F
Forecast sfc VirtT: 76.4 F
Surface elev Temp: 67.6 F
Surface elev VirtT: 70.0 F
Surface elevation: 137 ftMSL SfcAdjust:1
Station elevation: 344 ftMSL
Lowest elevation: 137 ftMSL
Lowest elev Temp: 67.6 F
Lowest elev VirtT: 70.0 F
Ford est. base of any clouds: 7397 ftMSL
Lowest elev windspeed: 6 kt
Mixing Layer windspeed: 10 kt
Convection overcast height: None ftMSL
Convection TI=0 height: 2277 ftMSL
Height *TI* Wind TI=0 Tv ------ Temperature Profile Plots ------
ftMSL degF deg kts trig degF o=Tv .=DewPt *=Adiabat 2.1 degF/division
----- ---- ------- ---- . ---- ---------------------------------------------
18000 41.1 231 24 115 | 21.5 * . o
17500 40.2 114 | 23.3 * . o
17000 39.3 113 | 25.0 * . o
16500 38.3 233 23 112 | 26.8 * . o
16000 37.3 111 | 28.4 * . o
15500 36.2 110 | 30.0 * . o
15000 35.2 234 23 109 | 31.6 * . o
14500 34.1 108 | 33.2 * . o
14000 33.0 107 | 34.8 * . o
13500 31.9 235 21 106 | 36.3 *. o
13000 30.7 105 | 37.9 *. o
12500 29.5 236 20 104 | 39.3 *. o
12000 28.2 237 18 102 | 40.7 * o
11500 26.9 101 | 42.1 * o
11000 25.6 239 16 100 | 43.4 * o
10500 24.3 240 15 98 | 44.8 * o
10000 22.9 242 13 97 | 46.0 .* o
9500 21.5 242 12 95 | 47.3 .* o
9000 20.0 246 10 94 | 48.5 . * o
8500 18.3 248 9 92 | 49.5 . * o
8000 16.6 254 7 91 | 50.4 . * o
7500 14.7 262 6 89 | 51.3 . * o
7000 13.0 87 | 52.2 . * o
6500 11.3 275 6 85 | 53.2 . * o
6000 9.7 289 7 84 | 54.2 . * o
5500 8.2 297 7 82 | 55.4 . * o
5000 6.9 304 8 81 | 56.8 . * o
4500 5.7 306 9 80 | 58.2 . * o
4000 4.5 308 9 79 | 59.7 . * o
3500 3.4 313 10 77 | 61.3 . * o
3000 1.9 316 10 76 | 62.5 . *o
2500 0.5 322 10 74 | 63.7 . *o
2000 -0.6 319 11 73 | 65.3 . o*
1500 -2.2 318 12 72 | 66.4 . o*
1000 -3.4 315 13 71 | 67.9 . o*
500 -4.0 313 10 70 ! 69.9 . o *
CLOUD FORMATION PARAMETERS from PM sounding
--------------------------------------------------------------
Expect extensive cloud formation at LCL when LCLdiff positive
or over mountains when LCL is (approx) below mt top
(1stLine=_no_warming, 2ndLine=_with_warming)
Thunderstorms possible when CAPE is positive
BLmaxRH LCLdiff LCL CCL CAPE Zsfc= 137 TI=0@ 2277
51 -4547 6824 16155 0
42 -5152 7429 16155 0
*************************************************************************** ***
******************** MISCELLANEOUS NOTES *************************************
Addtional local weather information is available at the Tmax data sites:
http://www.wunderground.com/cgi-bin/findweather/getForecast?query=98201
http://www.weather.com/weather/local/
and at the hourly data site:
http://www.weather.com/weather/hourbyhour/98201
The latest TIP forecasts are also available on the web at:
http://www.drjack.info/TIP/index.html
The hourly-updated BLIP forecasts of thermal soaring parameters at
specific locations for various times throughout the day are
available on the web at: http://www.drjack.info/BLIP/index.html
The latest BLIPMAP area forecasts of thermal soaring parameters for
the current day over CA/NV are available on the web at:
http://www.drjack.info/BLIPMAP/index.html