Effects of Synoptic Surveillance on model forecasts for
20 September 2005 0600 UTC
Rita.
Quicktime movie of AVN DLM wind model forecast
Quicktime movie of DLM wind data increment
| TRACK (km) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| MODEL | 12 h | 24 h | 36 h | 48 h | 60 h | 72 h | 84 h | 96 h | 108 h | 120 h
|
| AVNN | 20 | 44 | 49 | 102 | 195 | 301 | 359 | 429 | 531 | 634
| AVNO | 39 | 61 | 78 | 153 | 201 | 217 | 244 | 279 | 340 | 459
| %IMP | -95% | -39% | -59% | -50% | -3% | 28% | 32% | 35% | 36% | 28%
|
| GFNO | 15 | 59 | 46 | 63 | 97 | 123 | 142 | 174 | 238 | 338
| GFDL | 32 | 10 | 30 | 101 | 171 | 219 | 242 | 281 | 333 | 434
| %IMP | -113% | 83% | 35% | -60% | -76% | -78% | -70% | -61% | -40% | -28%
|
| INTENSITY (kt)
| MODEL | 12 h | 24 h | 36 h | 48 h | 60 h | 72 h | 84 h | 96 h | 108 h | 120 h
|
| AVNN | -56 | -79 | -112 | -119 | -88 | -76 | -67 | -53 | 4 | 14
| AVNO | -48 | -67 | -99 | -104 | -72 | -58 | -54 | -38 | -6 | -3
| %IMP | 14% | 13% | 12% | 13% | 18% | 24% | 19% | 28% | -50% | 79%
|
| GFNO | -8 | -22 | -39 | -44 | -20 | -10 | -14 | -7 | -2 | -7
| GFDL | -16 | -6 | -43 | -50 | -22 | -19 | -22 | -38 | -11 | -7
| %IMP | -100% | 73% | -10% | -14% | -10% | -90% | -57% | -443% | -450% | 0%
|
| | ||||||||||
| 24/0730 UTC 29.7N 93.7W between Johnson's Bayou, LA, and Sabine Pass 97.5 h into the forecast | |||||||||||||||||||||||||||||||||||||||||
| MODEL | LAT | LON | TIME | ERROR | LOCATION
|
| AVNN | 28.17 | 97.04 | 114.0 | 366.5 | Rockport, TX
| AVNO | 28.64 | 96.30 | 102.5 | 278.4 | Port Lavaca, TX
| %IMP | 24% | 70%
|
| GFNO | 29.07 | 95.14 | 94.0 | 156.0 | Freeport, TX
| GFDL | 28.89 | 95.29 | 88.0 | 178.4 | Freeport, TX
| %IMP | -171% | -14%
| | ||||
Figure 1. NCEP 850 - 200 hPa mean wind analysis for 20 September 2005 0600 UTC (Tropical Storm Rita).
Figure 2. Track forecasts for the no dropwindsonde (NO or NN) and the all dropwindsonde (AL) runs for the AVN and GFDL models initialized on 20 September 2005 0600 UTC.
Figure 3. Initial condition differences in the 850 - 200 hPa mean wind between the no and all dropwindsonde cases for 20 September 2005 0600 UTC.
