Hurricane Gamma (2020)

Basin

North Atlantic

Dates

October 2, 2020 to October 6, 2020

Peak strength

Category 1, 65 kt (75 mph)

Lowest pressure

978 mb (28.88 inHg)

Landfall

Yes

Accumulated cyclone energy

2.8

Tropical-storm-force wind reached

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

Hurricane-force wind reached

15 nmi (28 km, 17 mi) from the center at its widest

Eyewall radius at its peak

15 nmi (28 km, 17 mi)

Overall size

160 nmi (296 km, 184 mi) to the outermost closed isobar

Peak gust in the best track

75 kt (86 mph)

Fastest the center moved

9 kt (10 mph)

Identifier

AL252020

The sources count different things and are not added together.

Landfall points the US agencies flagged in the best track. The nearest town is named from the site’s gazetteer, not from the report.

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

4 in 1 reports from 1 states and marine areas

State by state

What was recorded

4 marine thunderstorm wind.

The Weather Prediction Center attributes 1,106 rain gauge totals over the contiguous United States to this storm. The wettest reached 15.20 inches (386 mm).

WPC’s storm rainfall file, 1900 to 2020, compiled by David Roth.

The strongest winds National Weather Service offices recorded with this storm. An estimated figure is a forecaster’s judgment from the damage, not an instrument reading.

From the Storm Events narratives, unedited.

A south-southeast wind gust of 35 knots was measured at the Naval Air Station Key West ASOS at Boca Chica Field as a thunderstorm passed.

Hawk Channel From West End of Seven Mile Bridge To Halfmoon Shoal Out To The Reef, Gulf of Mexico · Marine Thunderstorm Wind · Oct 4, 12:44 UTC

• Tropical Storm ArthurNorth Atlantic · 2020Tropical Storm55 kt · 989 mb
• Tropical Storm BerthaNorth Atlantic · 2020Tropical Storm45 kt · 1005 mb
• Tropical Storm CristobalNorth Atlantic · 2020 · 6 deaths · $310 millionTropical Storm50 kt · 982 mb
• Tropical Storm DollyNorth Atlantic · 2020Tropical Storm40 kt · 1000 mb
• Tropical Storm EdouardNorth Atlantic · 2020Tropical Storm40 kt · 1005 mb
• Tropical Storm FayNorth Atlantic · 2020 · 2 deaths · $220 millionTropical Storm50 kt · 998 mb
• Tropical Storm GonzaloNorth Atlantic · 2020Tropical Storm55 kt · 997 mb
• Hurricane HannaNorth Atlantic · 2020 · 4 deaths · $1.1 billionCat 180 kt · 973 mb
• Hurricane IsaiasNorth Atlantic · 2020 · 12 deaths · $5.0 billionCat 180 kt · 986 mb
• Unnamed tropical depressionNorth Atlantic · 2020Tropical Depression30 kt · 1008 mb
• Tropical Storm JosephineNorth Atlantic · 2020Tropical Storm40 kt · 1004 mb
• Tropical Storm KyleNorth Atlantic · 2020Tropical Storm45 kt · 1000 mb
• Hurricane LauraNorth Atlantic · 2020 · 47 deaths · $19 billionCat 4130 kt · 937 mb
• Hurricane MarcoNorth Atlantic · 2020Cat 165 kt · 991 mb
• Tropical Storm OmarNorth Atlantic · 2020Tropical Storm35 kt · 1003 mb
• Hurricane NanaNorth Atlantic · 2020Cat 165 kt · 994 mb
• Tropical Storm ReneNorth Atlantic · 2020Tropical Storm40 kt · 1001 mb
• Hurricane PauletteNorth Atlantic · 2020 · 2 deathsCat 290 kt · 965 mb
• Hurricane SallyNorth Atlantic · 2020 · 4 deaths · $7.3 billionCat 295 kt · 965 mb
• Hurricane TeddyNorth Atlantic · 2020 · 2 deaths · $20 millionCat 4120 kt · 945 mb
• Tropical Storm VickyNorth Atlantic · 2020Tropical Storm45 kt · 1001 mb
• Tropical Storm AlphaNorth Atlantic · 2020Tropical Storm60 kt · 992 mb
• Tropical Storm WilfredNorth Atlantic · 2020Tropical Storm35 kt · 1006 mb
• Tropical Storm BetaNorth Atlantic · 2020 · $225 millionTropical Storm55 kt · 993 mb
• Hurricane DeltaNorth Atlantic · 2020 · 2 deaths · $2.9 billionCat 4120 kt · 953 mb
• Hurricane EpsilonNorth Atlantic · 2020 · 1 deathCat 3100 kt · 952 mb
• Hurricane ZetaNorth Atlantic · 2020 · 5 deaths · $4.4 billionCat 3100 kt · 970 mb
• Hurricane EtaNorth Atlantic · 2020 · 172 deaths · $1.5 billionCat 4130 kt · 922 mb
• Tropical Storm ThetaNorth Atlantic · 2020Tropical Storm60 kt · 987 mb
• Hurricane IotaNorth Atlantic · 2020 · 67 deathsCat 4135 kt · 917 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
• Best track as KMZ, National Hurricane Center
• Best track as a shapefile, National Hurricane Center
• Wikipedia article: Hurricane Gamma