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

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

Assessments for each forecast time at

September 17, 2002				18 Z
September 18, 2002	00 Z	06 Z	12 Z	18 Z
September 19, 2002	00 Z	06 Z	12 Z	18 Z
September 20, 2002	00 Z	06 Z	12 Z	18 Z
September 21, 2002	00 Z	06 Z	12 Z	18 Z
September 22, 2002	00 Z	06 Z	12 Z	18 Z
September 23, 2002	00 Z	06 Z	12 Z	18 Z
September 24, 2002	00 Z	06 Z	12 Z	18 Z
September 25, 2002	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 Hurricane Isidore synoptic surveillance mission.

Figure 1b. Track forecast improvements for the GFS and GFDL models for the the Hurricane Isidore synoptic surveillance mission.

Figure 2. Forecast errors for the landfall of Hurricane Isidore at Cabo Frances, Cuba, 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.

Figure 3. Forecast errors for the landfall of Hurricane Isidore at Puerto Telchac, Yucatan, Mexico, 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.

Figure 4. Forecast errors for the landfall of Hurricane Isidore just west of Grand Isle, LA, 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.

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