Dennis Mersereau · 11/08/15 10:28PM

Tropical Depression Twelve formed near the Bahamas on Sunday evening, likely to become Tropical Storm Kate on Monday before it swiftly jets out to sea and away from the United States. This will probably finish off the strange 2015 Atlantic Hurricane Season, but tropical systems can and have formed as late as December.

Category Two Hurricane Joaquin Skirting Bermuda

Dennis Mersereau · 10/04/15 03:49PM

Bermuda is under a hurricane warning this afternoon as Hurricane Joaquin makes a very close call with the tiny island that sits 650 miles east of the United States. It’s rare for hurricanes to make a direct landfall on Bermuda due to its tiny size; last year, however, two hurricanes—Fay and Gonzalo—made landfall on the island in one week.

Joaquin Heading Out to Sea, But Extreme Rainfall and Major Coastal Flooding Still Likely

Dennis Mersereau · 10/02/15 02:59PM

Good news! We’re pretty sure that Hurricane Joaquin is going to head out to sea, with the chance of landfall on the United States fairly low at this point. The bad news is that there will still be more than a foot of rain in parts of the Carolinas, and stiff onshore winds and high waves will create coastal flooding in the Mid-Atlantic much like a storm surge would.

Here's a Satellite Loop of Joaquin's Eyewall Lashing the Bahamas for 15 Hours on Thursday

Dennis Mersereau · 10/01/15 08:11PM

This 5.50 megabyte GIF shows a 15-hour infrared satellite loop of Hurricane Joaquin as it slammed the Bahamas between 5:15 AM and 8:15 PM EDT on Thursday. The hurricane is a category four on the Saffir-Simpson Hurricane Wind Scale with sustained winds of 130 MPH, and it could strengthen a bit before weakening on Saturday. Joaquin is the strongest hurricane to hit the Bahamas since Floyd in 1999, which raked the island chain with sustained winds of 155 MPH.

Dennis Mersereau · 10/01/15 12:17AM

Hurricane Joaquin is a category three hurricane tonight with 115 MPH winds, and all indications point toward further strengthening. The 11:00 PM advisory from the NHC says it’ll be a category four with 140 MPH winds by this time Thursday. There’s still a decent chance it could make landfall along the East Coast this weekend. We’re going to see a major flooding event regardless of Joaquin’s whereabouts—a potential landfall will only make things much worse.

Hurricane Joaquin Is Threatening the East Coast: Here's What You Need to Know

Dennis Mersereau · 09/30/15 02:40PM

The latest forecast for Hurricane Joaquin puts it on an unnerving path toward the East Coast, but the track is far from certain right now. This week was going to be a flooding nightmare anyway—the hurricane is just rubbing salt in the wound. You need to prepare now for a significant, potentially life-threatening weather event later this week and this weekend.

Atmospheric Rube Goldberg Machine Could Dump Ridiculous Rain on I-95 Corridor This Week

Dennis Mersereau · 09/29/15 04:34PM

A complicated weather pattern will likely dump tons of rain on the East Coast later this week and this weekend. A wide range of possibilities could unfold—stretching from scattered showers to the unlikely event of a hurricane threatening land—so just about everyone who lives east of the Appalachian Mountains needs to watch the forecast closely.

Dennis Mersereau · 09/28/15 10:53PM

Tropical Storm Joaquin formed in the western Atlantic Ocean this evening. The cone of uncertainty covers the coast from North Carolina to Connecticut, and there is considerable uncertainty in the storm’s future track. We have to watch this system very closely. I’ll have an update on Tuesday once the morning models roll in and we have a better idea of what’s going on.

Dennis Mersereau · 09/11/15 10:21AM

Tropical Storm Henri, a sad blob about 700 miles south of Newfoundland, is racing toward its demise in the North Atlantic. Our next chance at tropical development in the basin looks like it might come from the Cape Verde area, but as with every other system this year, it’ll struggle against wind shear and dry air if it manages to pull itself together.

Rain and a Hurricane Almost Changed the Course of History on September 11, 2001

Dennis Mersereau · 09/11/15 07:00AM

Everyone remembers the weather fourteen years ago. Every remembrance story, every “where were you when” conversation, every newscast before the attacks mentions how the sky was a brilliant, deep shade of blue the morning the world turned upside down. However, had the sky not been as clear as it was that day—if the hurricane off the coast of New England hadn’t ricocheted toward Canada—it’s very possible that the weather could have permanently changed the course of both American and world history.

Despite El Niño, Atlantic Ocean Keeps Cranking Out Tropical Cyclones

Dennis Mersereau · 09/08/15 02:35PM

This Saturday is the climatological peak of hurricane season in the Atlantic Ocean. It’s been a weird year with about seven storms so far, and we still have more than two months until it’s over. The season could have been worse if it weren’t for El Niño conditions out in the Pacific Ocean, which saves the butt of many coastal residents around the Atlantic during this time of the year.

Dennis Mersereau · 09/05/15 05:27PM

Tropical Storm Grace formed near the Cape Verde Islands this afternoon. It will follow roughly the same path as Danny and Erika before it, and it’ll probably fizzle out in the dry air and wind shear. Meanwhile, Fred—a questionable tropical depression at best—is still hanging on by a thread. Neither storm will pose a threat to land in the next five days.

A Typhoon and a Hurricane Are the Same, So Why Do We Call Them Different Names?

Dennis Mersereau · 09/01/15 03:57PM

A tropical cyclone is an iconic storm that strikes fear (or laughter) in the heart of coastal residents around the world. Most of these low pressure systems over the ocean are weak, but some can grow into monsters. If they’re all the same kind of storm, though, why do we call them different names around the world?

Tropical Storm Erika Croaks, But Heavy Rain Is Still Possible in Florida 

Dennis Mersereau · 08/29/15 04:45PM

Remember Erika? The mountains of Hispaniola and Cuba tore it to bits, and the National Hurricane Center declared it dead at 9:30 this morning. All that tropical moisture has to go somewhere, though, and Florida could still see several inches of rain from its remnants. Tropical downpours on saturated soil will lead to the potential for dangerous flooding, so it’s not something to take lightly.

Deadly Flash Flooding Possible as Tropical Storm Erika Aims for Puerto Rico

Dennis Mersereau · 08/27/15 05:43PM

Tropical Storm Erika is a mess today, barely holding itself together as it draws closer to Puerto Rico. Despite its ragged appearance, the storm is producing very heavy rain along its path; devastating flooding on the small island of Dominica killed at least four people last night. Erika is still a threat to Florida, and current forecasts show the storm closing in on the Sunshine State as a hurricane early next week.

Tropical Storm Erika Could Break Florida's 3,594-Day Hurricane-Free Streak

Dennis Mersereau · 08/26/15 02:43PM

We’re fast approaching ten years since the last hurricane made landfall in Florida. Hurricane Wilma struck the southwestern tip of the state on October 24, 2005, and ever since then, this hurricane-prone panhandle has been incredibly lucky. That could change in the coming days if the forecasts hold true.

Tropical Storm Erika Could Either Threaten the U.S. Next Week or Fall Apart into Nothing

Dennis Mersereau · 08/25/15 02:53PM

Social media is buzzing this afternoon over the possibility that Tropical Storm Erika could strengthen into a hurricane and threaten the U.S. East Coast next week. However, the forecast is far from certain, and the storm could either make landfall or fall apart or swerve out to sea. Predicting the future is hard, and Tropical Storm Erika represents one of those frustrating limits of weather forecasting.