Atlantic Post-Tropical Cyclone GONZALO Discussion Number 30 000 WTNT43 KNHC 192039 TCDAT3 POST-TROPICAL CYCLONE GONZALO DISCUSSION NUMBER 30 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082014 500 PM AST SUN OCT 19 2014 The combined effect of sea-surface temperatures around 10C and southwesterly vertical wind shear of more than 40 kt has finally taken its toll on Gonzalo. The upper-level circulation is tilted more than 100 nmi to the northeast of the low-level circulation center, and an abundance of cold-air stratocumulus clouds has wrapped all the way around the entire low-level circulation. Gonzalo looks like a frontal low in satellite imagery, suggesting that the system has completed its transformation into an extratropical cyclone. The initial intensity has been decreased to 70 kt, which is consistent with various decay models. Only gradual weakening is expected during the next 48 hours.
