Figure 4

AVNN forecast tracks

Fig. 4. Track forecasts for the no dropwindsonde GSM control (AVNN), the all dropwindsonde run (AVAL), the lower-level dropwindsonde run (AVP3), the run with only targeted observations (AVTG), and its complement (AVNT) for Tropical Storm Alex, 1 August 1998 0000 UTC.

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