Effects of Synoptic Surveillance on model forecasts for
23 August 1999 1800 UTC
DENNIS.

QuickTime movie of DLM wind model forecasts
QuickTime movie of DLM wind data increments

Figure 1. NCEP 850 - 200 hPa mean wind analysis for 23 August 1999 1800 UTC (Pre-Tropical Depression Dennis).

Figure 2. Initial condition differences in the 850 - 200 hPa mean wind between the no and all dropwindsonde cases for 23 August 1999 1800 UTC.

Figure 3. 12-h forecast differences in the 850 - 200 hPa mean wind between the no and all dropwindsonde cases for 23 August 1999 1800 UTC.