Days Until Hurricane Season 2018
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Current Tropics Activity

Active Storms: None.
Active Investigation Alert: 90L
Areas of Interest: None.

Resource Partners

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Saffir-Simpson Hurricane Scale
Category Wind Speed Storm Surge
  mph ft
5 ≥157 >18
4 130–156 13–18
3 111–129 9–12
2 96–110 6–8
1 74–95 4–5
Additional Classifications
Tropical Storm 39–73 0–3
Tropical Depression 0–38 0
The Saffir-Simpson Hurricane Scale is a classification used for most Western Hemisphere tropical cyclones that exceed the intensities of "tropical depressions" and "tropical storms", and thereby become hurricanes. Source: Intellicast

Beaufort Wind Scale

Number Of Storms Per 100 Yrs

Atlantic Basin Storm Count Since 1850


Atlantic Basin Storm Count Since 1850

Typical Tropical Cyclone Origins and Track By Month



June Hurricane Climatology

July Hurricane Climatology

August Hurricane Climatology

September Hurricane Climatology

October Hurricane Climatology

November Hurricane Climatology

Hurricane Strike Percentages


[Map of return period in years for hurricanes passing within 50 nautical miles] Estimated return period in years for hurricanes passing within 50 nautical miles of various locations on the U.S. Coast


[Map of return period in years for major hurricanes passing within 50 nautical miles] Estimated return period in years for major hurricanes passing within 50 nautical miles of various locations on the U.S. Coast


CONUS Hurricane Strikes

 
[Map of 1950-2011 CONUS Hurricane Strikes] 1950-2011 CONUS Hurricane Strikes (Courtesy of NCDC)

Lookup Historic Hurricane Tracks



Hurricane Katrina Track 2005

2017 Hurricane Season Storms

Tropical Storm ARLENE
Duration April 19 – April 21 2017
Peak intensity 50 mph (85 km/h) (1-min)
990 mbar (hPa)
Tropical Storm BRET
Duration June 19 – June 20 2017
Peak intensity 50 mph (85 km/h) (1-min)
1007 mbar (hPa)
Tropical Storm CINDY
Duration June 20 – June 23 2017
Peak intensity 60 mph (95 km/h) (1-min)
991 mbar (hPa)
Tropical Storm DON
Duration July 17 – July 18 2017
Peak intensity 50 mph (85 km/h) (1-min)
1005 mbar (hPa)
Tropical Storm EMILY
Duration July 30 – August 2 2017
Peak intensity 60 mph (95 km/h) (1-min)
1001 mbar (hPa)
Hurricane FRANKLIN
Duration August 7 – August 10 2017
Peak intensity 85 mph (140 km/h) (1-min)
981 mbar (hPa)
Hurricane GERT
Duration August 12 – August 17 2017
Peak intensity 110 mph (175 km/h) (1-min)
962 mbar (hPa)
Major Hurricane HARVEY
Duration August 17 – September 1 2017
Peak intensity 130 mph (215 km/h) (1-min)
937 mbar (hPa)
Major Hurricane IRMA
Duration August 30 – September 12 2017
Peak intensity 180 mph (285 km/h) (1-min)
914 mbar (hPa)
Major Hurricane JOSE
Duration September 5 – September 22 2017
Peak intensity 155 mph (250 km/h) (1-min)
938 mbar (hPa)
Hurricane KATIA
Duration September 5 – September 9 2017
Peak intensity 105 mph (165 km/h) (1-min)
972 mbar (hPa)
Tropical Storm LEE
Duration September 14 – September 30 2017
Peak intensity 115 mph (185 km/h) (1-min)
962 mbar (hPa)
Major Hurricane MARIA
Duration September 16 – September 30 2017
Peak intensity 175 mph (280 km/h) (1-min)
908 mbar (hPa)
Hurricane NATE
Duration October 4 – October 9 2017
Peak intensity 90 mph (150 km/h) (1-min)
981 mbar (hPa)
Major Hurricane OPHELIA
Duration October 9 – October 16 2017
Peak intensity 115 mph (185 km/h) (1-min)
959 mbar (hPa)
Tropical Storm PHILIPPE
Duration October 28 – October 29 2017
Peak intensity 40 mph (65 km/h) (1-min)
1000 mbar (hPa)
Tropical Storm RINA
Duration November 5 – November 9 2017
Peak intensity 60 mph (95 km/h) (1-min)
991 mbar (hPa)

MJO Model Forecasts

Madden-Julian Oscillation (MJO)

The Madden–Julian Oscillation (MJO) is the largest element of the intraseasonal (30–90 days) variability in the tropical atmosphere. It is a large-scale coupling between atmospheric circulation and tropical deep convection. Rather than being a standing pattern (like ENSO) it is a traveling pattern, propagating eastwards at approximately 4 to 8 m/s, through the atmosphere above the warm parts of the Indian and Pacific oceans. This overall circulation pattern manifests itself in various ways, most clearly as anomalous rainfall. This was discovered by Roland Madden and Paul Julian (again the comparison with ENSO is instructive, since their local effects on Peruvian fisheries were discovered long before the global structure of the pattern was recognized).

The MJO is characterized by an eastward progression of large regions of both enhanced and suppressed tropical rainfall, observed mainly over the Indian Ocean and Pacific Ocean. The anomalous rainfall is usually first evident over the western Indian Ocean, and remains evident as it propagates over the very warm ocean waters of the western and central tropical Pacific. This pattern of tropical rainfall then generally becomes nondescript as it moves over the cooler ocean waters of the eastern Pacific (except over the region of warmer water off the west coast of Central America) but occasionally reappears at low amplitude over the tropical Atlantic and higher amplitude over the Indian Ocean. The wet phase of enhanced convection and precipitation is followed by a dry phase where thunderstorm activity is suppressed. Each cycle lasts approximately 30–60 days. Because of this pattern, The MJO is also known as the 30–60 day oscillation, 30–60 day wave, or intraseasonal oscillation.

All Model Mean Forecast

Ensemble Mean

ECMWF Forecast

ECMWF Forecast

EMON Forecast

EMON Forecast<

Canadian Forecast

Canadian Forecast

NCEP GFS OP Forecast

NCEP GFS OP Forecast<

JMA Ensemble Forecast

JMA Ensemble Forecast

MMEF Forecastt

MMEF Forecast<

UKMET Forecast

UKMET Forecast

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