Effects of Synoptic Surveillance on model forecasts for
Hurricane Dennis.


Assessments for each forecast time at
July 06, 2005 18 Z
July 07, 2005 00 Z 06 Z 12 Z 18 Z
July 08, 2005 00 Z 06 Z 12 Z 18 Z
July 09, 2005 00 Z 06 Z 12 Z 18 Z
July 10, 2005 00 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 Hurricane Dennis synoptic surveillance missions.

Fig 1b. Track forecast improvements for the GFS and GFDL models for the Hurricane Dennis synoptic surveillance missions.

(a)
(b)

Fig 2. Forecast errors for the landfall of Hurricane Dennis at Punta del Ingles, Cuba in the (a) cross- and (b)along-track directions for the no dropsonde (NO or NN) and the all dropwindsonde (AL) runs for the GFS and GFDL models.

(a)
(b)

Fig 3. Forecast errors for the landfall of Hurricane Dennis at Punta Manfles Altos, Cuba in the (a) cross- and (b)along-track directions for the no dropsonde (NO or NN) and the all dropwindsonde (AL) runs for the GFS and GFDL models.

(a)
(b)

Fig 4. Forecast errors for the landfall of Hurricane Dennis at Santa Rosa Island, FL in the (a) cross- and (b)along-track directions for the no dropsonde (NO or NN) and the all dropwindsonde (AL) runs for the GFS and GFDL models.