Effects of Synoptic Surveillance on model forecasts for
Hurricane Bret.


QuickTime movie of DLM wind analyses
QuickTime movie of DLM wind data initial increments


Assessments for each forecast time at
August 21, 1999 18 Z
August 22, 1999 00 Z 06 Z 12 Z



Figure 1a. Track forecast errors for the no dropwindsonde (NO or NN) and the all dropwindsonde (AL) runs for the GFS, GFDL, and VBAR models for the Hurricane Bret synoptic surveillance mission.


Figure 1b. Track forecast improvements for the GFS, GFDL, and VBAR /models for the the Hurricane Bret synoptic surveillance mission.


(a)

(b)
Figure 2. Forecast errors for the landfall of Hurricane Bret at Padre Island, TX, in the (a) cross- and (b) along-track directions for the no dropwindsonde (NO or NN) and the all dropwindsonde (AL) runs for the GFS, GFDL, and VBAR models.


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