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A look at the Atlantic: June 9, 2017

A look at the Atlantic: June 9, 2017

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It is Friday, and that means it is time to take a look at the Atlantic. The Atlantic remains quiet for now, with the National Hurricane Center not expecting the development of any new tropical cyclones during the next five days. However, there are indications that the Atlantic could wake up in the long range – I will discuss this in detail tomorrow. SEA SURFACE TEMPERATURES Sea surface temperatures (SSTs) in the Atlantic continue to gradually warm up with time….

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June CPC Update: El Niño chances continue to diminish for the 2017 Atlantic hurricane season

June CPC Update: El Niño chances continue to diminish for the 2017 Atlantic hurricane season

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Thursday morning, the Climate Prediction Center (CPC) issued their monthly discussion on the El Niño-Southern Oscillation (ENSO), which is typically released on the second Thursday of each month. Their update lowered the chances of El Niño for fall 2017, with chances being lowered from about 45% to 35-40%. No El Niño Watch was issued, meaning the development of El Niño is not imminent. This continues the trend of the past few ENSO discussions: lowering chances of El Niño and increasing chances of ENSO-neutral…

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The GFS model runs for 384 hours, but do not trust the model beyond 240 hours: here is why

The GFS model runs for 384 hours, but do not trust the model beyond 240 hours: here is why

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The American Global Forecast System (GFS) model is one of the most reliable models used by meteorologists to predict the tracks of tropical cyclones. It runs on six-hour intervals at 00:00, 06:00, 12:00 and 18:00 UTC, for 384 hours (16 days). The GFS is the only major tropical weather model that runs for 384 hours: the CMC and ECMWF models run for 240 hours (ten days), while the HWRF hurricane model runs for 126 hours (just over five days). The…

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Uptick in African tropical wave activity likely next week, weak deep tropics development not out of the question

Uptick in African tropical wave activity likely next week, weak deep tropics development not out of the question

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The CFSv2 and GFS models are consistent with showing an increase in upward motion in the eastern tropical Atlantic in about 7-10 days. In addition, the models show well above-normal rainfall just off the coast of Africa. This indicates that a major uptick in African tropical waves is likely soon, with stronger, more vigorous waves emerging into the Atlantic. Tropical wave activity in the Atlantic typically begins in mid-to-late May and lasts until November, occasionally early December, with a peak…

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A history of June tropical cyclones in the Atlantic

A history of June tropical cyclones in the Atlantic

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June is the first month of the Atlantic hurricane season, and is on average the least active of the six months that make up the season. According to NOAA, the month of June has seen 92 total tropical cyclones since reliable records began in 1851. Of these 92 tropical cyclones, just 33 (35.9%) of them became hurricanes. This means that, on average, a named storm forms in June in slightly over half of all years. In uncommon cases, two or…

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Tropical Atlantic, East Pacific likely to be quiet for a while

Tropical Atlantic, East Pacific likely to be quiet for a while

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The tropics in the Atlantic and East Pacific are likely to remain quiet for the next week or two. Don’t expect the formation of Bret or Beatriz in the near future. Last week, a somewhat favorable Madden-Julian Oscillation (MJO) pattern allowed Tropical Storm Adrian to spin up in the East Pacific. However, the favorable MJO has moved out of the Western Hemisphere, and is heading towards the Indian Ocean and Western Pacific. A favorable MJO pattern is characterized by moist, rising…

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