Tropical Update: Ana Brushes Hawaii; Gonzalo Now Post-Tropical

Stu Ostro
Published: October 19, 2014

- Tropical Storm Ana about 210 miles southwest of Honolulu and bringing heavy rainfall to Oahu

- Tropical Storm warning for Kauai as winds and heavy rainfall spread westward tonight

- Watching the Gulf of Mexico this week


Although the rainfall pattern from Trudy's remnants is more sporadic, there are a few scattered heavy downpours.

A few of them are in the southwest Gulf, the very beginnings of the upcoming system.

For public perception it's going to come down to whether NHC finds enough tropical characteristics to designate it as something other than non-tropical; regardless the question for the U.S. is how far north the system, and its effects, are able to go: barely reach Florida, affect much of South Florida, or make it farther north. 

Latest model runs predict that it's gonna be a slow process, not exiting the region until late in the week or the weekend.


A non tropical area of low pressure over the far northeastern Atlantic west of the Canary Islands (Invest 92-L) could turn subtropical over the next few days but is no threat to the United States.

Invest 92-L is wrapping some shallow convection around close to the center, i.e. in the process of trying to take on characteristics of a subtropical cyclone.

​Meanwhile, Gonzalo has become post-tropical and is accelerating over the chilly waters of the North Atlantic.

(MORE: Gonzalo Recap)


​Ana was downgraded to a tropical storm late Sunday afternoon Hawaiian time.

The main impact to Hawai'i continues to be the moderate to heavy rainfall. So far today officially the airport in Honolulu has picked up just over 2 inches of rain. Locally rainfall totals will be even higher, especially in areas of where winds move up mountain tops.

Rain continues to fall on the northwest Hawaiian islands. Some of the latest total amounts in Hawaii include 8.43 inches at Maona Lyon Arboretum on Oahu, and 11.67 inches at Keaumo on the Big Island. Given the radar-estimated rainfall of over 15 inches offshore, it's a good thing the core of Ana took a track away from Hawaii (along with the increased wind/ocean impacts it would have brought).

The heavy rain and wind threat will then spread to Kauai and Niihau Sunday night into Monday. A Tropical storm warning is in effect for these latter two islands, as some gusty winds in excess of 39 mph are possible as Ana passes by about 90 miles to their south and west.

Dangerous and damaging surf surf continues to be a threat for all of the islands.

The weather will slowly pull away from the state on Monday, with conditions improving by Tuesday.

(MORE: Ana Forecast)


Our live wall below has the latest updates from our hurricane experts and from coastal National Weather Service offices. No need to refresh, the latest updates will appear at the top of the wall. Time stamps on each post are in Eastern U.S. time.

(MORE: Glossary of Tropical Terms | New NHC Storm Surge Maps)


MORE: Hurricanes From Space (NASA Satellite Images)


Featured Blogs

Gonzalo Brushes Newfoundland; Ana Drenching Hawaii

By Dr. Jeff Masters
October 19, 2014

What is the Wettest Month of the Year in the U.S.?

By Christopher C. Burt
October 10, 2014

Brian Brettshneider of Borealis Scientific has done some impressive research concerning what the wettest calendar month of the year might be by employing data from 8,535 official NCDC sites from across the U.S. utilizing the latest 30 years of record (1981-2010). His conclusion is that June is, overall, most frequently the wettest month in the U.S. with 2,053 of the 8,535 sites reporting such. April, at the other end of the spectrum, reports only 76 sites of the 8,535 as their wettest month. This is a guest blog by Brian and below are the results of his research (both text and maps are his).

Live Blog: Tracking Hurricane Arthur as it Approaches North Carolina Coast

By Shaun Tanner
July 3, 2014

This is a live blog set up to provide the latest coverage on Hurricane Arthur as it threatens the North Carolina Coast. Check back often to see what the latest is with Arthur. The most recent updates are at the top.

Tropical Terminology

By Stu Ostro
June 30, 2014

Here is some basic, fundamental terminology related to tropical cyclones. Rather than a comprehensive and/or technical glossary, this represents the essence of the meaning & importance of some key, frequently used terms.

2013-14 - An Interesting Winter From A to Z

By Tom Niziol
May 15, 2014

It was a very interesting winter across a good part of the nation from the Rockies through the Plains to the Northeast. Let's break down the most significant winter storms on a month by month basis.

What the 5th IPCC Assessment Doesn't Include

By Angela Fritz
September 27, 2013

Melting permafrost has the potential to release an additional 1.5 trillion tons of carbon into the atmosphere, and could increase our global average temperature by 1.5°F in addition to our day-to-day human emissions. However, this effect is not included in the IPCC report issued Friday morning, which means the estimates of how Earth's climate will change are likely on the conservative side.