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

Assessments for each forecast time at

August 02, 2006				18 Z
August 03, 2006	00 Z	06 Z	12 Z

Fig 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 Chris synoptic surveillance missions.

Fig 1b. Track forecast improvements for the GFS and GFDL models for the Tropical Storm Chris synoptic surveillance missions.