Effects of Synoptic Surveillance on model forecasts for
Tropical Storm Harvey.


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


Assessments for each forecast time at
September 20, 1999 18 Z
September 21, 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 and GFDL models for the Tropical Storm Harvey synoptic surveillance mission.


Figure 1b. Track forecast improvements for the GFS and GFDL models for the the Tropical Storm Harvey synoptic surveillance mission.


(a)


(b)

Figure 2. Forecast errors for the landfall of Tropical Storm Harvey at Everglades City, FL, 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 and GFDL models.


Return to 1999 assessment page
Return to HRD home page