Hurricane Guillermo (2009)

Basin

Eastern Pacific

Dates

August 9, 2009 to August 23, 2009

Peak strength

Category 3, 110 kt (127 mph)

Lowest pressure

954 mb (28.17 inHg)

Landfall

No; closest approach 688 km (428 mi)

Accumulated cyclone energy

12.5

Tropical-storm-force wind reached

150 nmi (278 km, 173 mi) from the center at its widest

Hurricane-force wind reached

35 nmi (65 km, 40 mi) from the center at its widest

Eyewall radius at its peak

15 nmi (28 km, 17 mi)

Overall size

200 nmi (370 km, 230 mi) to the outermost closed isobar

Peak gust in the best track

135 kt (155 mph)

Fastest the center moved

38 kt (44 mph)

Identifier

EP102009

The sources count different things and are not added together.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

0 (0 direct, 0 indirect)

Injuries

0

Property damage

none recorded

Crop damage

none recorded

Events recorded

9 in 1 reports from 1 states and marine areas

State by state

What was recorded

9 high surf.

• Unnamed tropical depressionEastern Pacific · 2009Tropical Depression30 kt · 1001 mb
• Hurricane AndresEastern Pacific · 2009Cat 170 kt · 984 mb
• Tropical Storm BlancaEastern Pacific · 2009Tropical Storm45 kt · 998 mb
• Hurricane CarlosEastern Pacific · 2009Cat 290 kt · 971 mb
• Tropical Storm DoloresEastern Pacific · 2009Tropical Storm50 kt · 997 mb
• Tropical Storm LanaEastern Pacific · 2009Tropical Storm55 kt · 995 mb
• Hurricane FeliciaEastern Pacific · 2009Cat 4125 kt · 935 mb
• Tropical Storm EnriqueEastern Pacific · 2009Tropical Storm55 kt · 994 mb
• Unnamed tropical depressionEastern Pacific · 2009Tropical Depression30 kt · 1006 mb
• Tropical Storm MakaEastern Pacific · 2009Tropical Storm45 kt · 992 mb
• Tropical Storm HildaEastern Pacific · 2009Tropical Storm55 kt · 995 mb
• Tropical Storm IgnacioEastern Pacific · 2009Tropical Storm45 kt · 999 mb
• Unnamed tropical depressionEastern Pacific · 2009Tropical Depression30 kt · 1007 mb
• Tropical Storm KevinEastern Pacific · 2009Tropical Storm45 kt · 1000 mb
• Hurricane JimenaEastern Pacific · 2009Cat 4135 kt · 931 mb
• Hurricane LindaEastern Pacific · 2009Cat 170 kt · 985 mb
• Tropical Storm MartyEastern Pacific · 2009Tropical Storm40 kt · 1002 mb
• Tropical Storm NoraEastern Pacific · 2009Tropical Storm50 kt · 997 mb
• Tropical Storm OlafEastern Pacific · 2009Tropical Storm40 kt · 996 mb
• Tropical Storm PatriciaEastern Pacific · 2009Tropical Storm50 kt · 996 mb
• Hurricane RickEastern Pacific · 2009Cat 5155 kt · 906 mb
• Hurricane NekiEastern Pacific · 2009Cat 3110 kt · 950 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

• Tropical cyclone report, National Hurricane Center
• Every advisory and discussion NHC issued while it was live