Hurricane Douglas heading for Hawaii and Hanna heading to Texas, Gonzalo near Barbados
Blog by Jo Farrow
Issued: 24th July 2020 18:17

Hurricane Douglas heading for Hawaii and Hanna heading to Texas, Gonzalo near Barbados

Three tropical cyclones are expected to make landfall this weekend. Hurricane Douglas is heading towards the Hawaiian Islands in the central Pacific. Tropical Storm Gonzalo is moving westwards towards the Windward Islands and newly named Tropical Storm Hanna in the Gulf of Mexico is heading towards eastern Texas.

Tropical Storm Hanna

TS Hanna is expected to bring Tropical Storm conditions to Texas by Friday night (local time) and during Saturday morning. A wider area of the Gulf coast will see heavy rain and the risk of flash flooding or high river levels, from Louisiana, around the Texas coast into Mexico. 3-5” of rain is forecast with 8-12” through Sunday night in south Texas. There will also be lively conditions along the coast with large swell, surf and dangerous rip currents.

Governor Abbot said “Throughout the weekend, Texans should heed the guidance from local officials and remain vigilant against this severe weather to keep themselves and their loved ones safe. “

NHC “strengthening is likely prior to landfall. “ but stays as a Tropical Storm with maximum sustained winds up to 65mph (Discussion No.6)

Tropical Storm Hanna rainfall

The heaviest rain looks to move near Corpus Christi and to the south but pushes inland on Saturday

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It moves over more of southern Texas at the weekend and then into NE Mexico, eventually coming up against mountains.

Tropical Storm Gonzalo still has some uncertain about whether it will strengthen into a Hurricane, it is a small tropical cyclone in diameter. The high winds and heavy rain are expected to move across the warning areas on Saturday. Rainfall in Barbados and the Windward Islands could lead to life-threatening flash floods.

Some strengthening is forecast during the next day or two and there is still a chance that Gonzalo could become a hurricane before reaching the Windward Islands.  Weakening is expected after Gonzalo moves into the Caribbean Sea. NHC

There are Tropical Storm warning for St Lucia.  Barbados, St Vincent and the Grenadines have TS warning and a hurricane watch. Tobago and Grenada have a TS watch. Along with the high winds there will be very heavy rain.

For Tobago - Periods of heavy to intense showers and/or thunderstorms are likely. Heavy/intense downpours can result in street/flash flooding. Gusty winds and the risk of landslides/landslips is very high. Sea conditions are also likely to become occasionally rough. 

Tropical Storm Gonzalo

Hurricane Douglas continues westwards in the central Pacific. It will continue to weaken as it moves towards Hawaii, it has been a Major Hurricane (a Cat.4) but will remain a powerful Hurricane as it approaches the islands by early Sunday but should decrease to Tropical Storm status as it interacts with the mountainous region.

Douglas will move over cooler waters then encounters drier air and more vertical wind shear which will aid the weakening. The responsibility for Douglas has now passed from the NHC in Miami to CPHC in Honolulu. "Watches for the Big Island and Maui County will be likely early Friday."

Hurricane Douglas Hawaii

Model spread –  A subtropical ridge north of the Hawaiian islands strengthens and steers Douglas west, over or very near to the islands Sunday into Monday. ECMWF has always had a more southerly track, other models would move Douglas further north.

At any time an approaching tropical cyclone is a potential disaster but with the COVID pandemic, there is an added risk and stress of trying to keep safe from the virus with disruption to water and power supplies, perhaps being displaced as well as facing the dangers of damaging winds and flooding. The Government issue advice to pack and prepare for 14 days in case the hurricane hits but some people are already struggling with the economic downturn from COVID and are unable to make that outlay. There would also be the issue of physical distancing for emergency responders, forecasters and shelters.

Although there have been several named storms in the Atlantic this season, with an early start for so many, there has yet to be a Hurricane. We'll see what Gonzalo manages.  Considering how large the Pacific is, hurricanes don’t often make landfall on the Hawaiian Islands so the progress of Douglas will be watched carefully.

Tags: World Weather  Severe Weather

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