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Tropical Storm Guillermo Forms West-Southwest of Baja California

17.3N 118.1W

August 13th, 2009 Category: Tropical Storms

Formation of TS Guillermo - August 11th, 2009

Formation of TS Guillermo - August 11th, 2009

Enhanced image

Enhanced image

Track of Guillermo - August 13th, 2009 © Univ. of Wisconsin

Track of Guillermo

Tropical Storm Guillermo formed on August 12 from a broad area of low pressure nearly 700 miles southwest of Baja California.

The system developed a good series of banding features and convection, and as a result, in the early afternoon later that day, it strengthened into a tropical storm. The main image shows the system as it was developing, while the animated imagery depicts the movement of the full-fledged tropical storm.

As of 2:00 AM PDT (0900 UTC), the center of the system was located about 805 miles (1295 km) west-southwest of the southern tip of Baja California. Guillermo is moving toward the west-northwest near 16 mph (26 km/hr), and this general motion is expected to continue during the next day or two.

Maximum sustained winds have increased to near 50 mph (85 km/hr) with higher gusts. Some additional strengthening is forecast during the next day or two. Tropical storm force winds extend outward up to 85 miles (140 km) from the center. Estimated minimum central pressure is 999 mb (29.50 inches).

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