Shows Weather

Tonight’s Hanna Briefing

Tonight’s briefing started with a recap of Gustav and its impacts in Louisiana. We then moved along to Hanna; the 5PM track continues to take the storm in at the GA/SC border and up the gut of SC, and could potentially bring hurricane force winds to Charleston by Friday. Also, I took a quick look at Ike and yet another area under investigation out in the Atlantic, Invest 99.

I’ll have a full post with the next full advisory at 11PM.


Gustav pounds NOLA; Hanna strengthens

Morning folks. It’s an unhappy Labor Day for the Louisiana Gulf Coast, as hurricane-force winds from Hurricane Gustav are coming ashore. New Orleans is, as of this writing, just entering the worst of it, as depicted by the radar image below.

New Orleans begins to get the worst

It appears there’s still Internet access down there. Mark Mayhew, in particular, is tweeting up a storm; I suspect we’ll hear more from folks on the ground, they’re just trying to get a little sleep. Here’s hoping those who stayed — not many, according to officials — are able to safely ride out the storm.

Hanna gains some strength, may be reorganizing

Tropical Storm Hanna’s regained a little strength and is up to 50 MPH this morning, and according to the NHC forecast discussion, it could actually be stronger depending on the center position, which has been hard to pinpoint thanks to lots and lots of shear still over the system. It’s drifting westward at 2 MPH toward the Bahamas, which have tropical storm warnings raised.

So where’s this going to go? It’s still touch and go. Here’s the official forecast:

Tropical Storm Hanna - Projected Path

The forecast still takes the storm in at the mouth of the Savannah River; however, the cone of uncertainty is still several hundred miles wide. According to the 5am NHC forecast discussion, Hanna’s size has a lot of bearing on where it goes. Here are the model plots bearing out a number of scenarios:

Tropical Storm Hanna - 6am 9/01 Forecast Models

One area of agreement, finally, is that the storm will indeed take up a northwesterly track toward the southeastern U.S. coast. From there, it all breaks loose; the solutions run the gamut from coming ashore in Florida and riding up the coast to recurving out to sea harmlessly. GFDL, one of the tropically-oriented models, is in favor of a landfall just south of Savannah; HWRF, another tropically-oriented model, takes it into Georgetown.

The variability is just a reminder for all southeast coast residents to keep an eye on things as the week goes on. It’s still too early to tell where this thing is going to hit and who’s going to feel what.

Shows Weather

Gustav and Hanna Briefing

Here’s tonight’s Serious Business/Charleston Weather show concerning Gustav and Hanna. I’ll have a lot more on Hanna as the week goes on as it has a decent chance of causing some inclement weather in Charleston by the end of the week.


Gustav continues to plow to NOLA; Hanna struggles

Before I hit the sack, I wanted to bring folks up to speed about my latest thoughts on Gustav and Hanna. First, Gustav.

Eyewall Replacement Cycle?

Gustav emerged off the coast of Cuba at roughly 11:30 or so and promptly started trying to get its act back together. It looks like it’s in the middle of an eyewall replacement cycle, which basically means it’s reorganizing a bit at the core and should be ready to start strengthening again. Cuba knocked it down to a 140 MPH system, which is still nothing to sneeze at. I suspect we’ll wake up to Gustav as a Category 5 tomorrow morning.

Official Track and Computer Models, 11PM

The official track takes the center of the storm roughly 50 miles or so west of New Orleans, which is likely to cause tremendous problems not only for the city itself, but for a fairly wide swath of real estate, as the current scenario could push surge up the Mississippi. It’s a matter of wobbles — again, as I’ve said before, five miles to the east or west could be a world of difference. The computer models continue to show a cone of uncertainty stretching roughly from the LA-MS border to the LA-TX border. The track has continued to go eastward as Gustav wobbled right several times during the day. The landfall point is still very uncertain, and we probably won’t really know where it will end up until the hours immediately leading up to the point of landfall.

The good news is that New Orleans is being evacuated. Here’s hoping they can get everybody out this time — I have a bad feeling that because of the position of the center, this could be worse for NOLA. We’ll see what the next day bears out.

Hanna’s future becoming a smidgen clearer…maybe

Hanna’s still struggling in the face of wind shear and some interference from Gustav. It’s hanging in there at 50 MPH, as it has for much of the day. The wind shear is expected to back off just enough to let it strengthen a bit more, but the NHC discussion forecasts the shear to return Tuesday, which should inhibit development.

Model runs on Hanna run the gamut from a landfall at the Florida/Georgia border (NGP) to a brushing of the Outer Banks and eventual recurvature to sea (GFS). I’m seeing some consensus between the GFDL and HWRF models, specifically designed for forecasting tropical cyclones, in a scenario bringing the center onshore in South Carolina; likely somewhere like Bulls Bay, Georgetown, or Myrtle Beach. However, two models does not a forecast make. Keep in mind it’s still very early — a week away — and that there is still plenty of divergence in the other atmospheric models. The GFDL is being weird about Hanna, too, somehow developing it into a Category 3 despite forecasted moderate wind shear.

As always, it behooves anybody from Florida to North Carolina to keep a close eye to Hanna as it meanders around in the Atlantic. I suspect Hanna is going to become quite a thorn in our side as the week progresses.

In Brief Shows

The Tropics are Serious Business

Unsurprisingly, Serious Business tomorrow night will be almost entirely devoted to not just Gustav’s impending landfall but also talking about Tropical Storm Hanna and its potential impact on the East Coast later this week. Be sure to join me at 8:30 Eastern tomorrow night!


Gustav knocking on Category 5’s door

Hurricane Gustav radar fix in Cuba

Major Hurricane Gustav is closing in on Category 5 status very quickly, raking Cuba and giving Key West quite a blustery time in the process. As of the 5 PM advisory, Gustav’s packing 150 MPH sustained winds, making it an intense Category 4, and is moving to the northwest at 15 MPH. This puts the storm somewhere along the Gulf Coast roughly Monday night. Model guidance agrees well on Gustav’s track at this point; it’s now a matter of wobbles — five miles east or west could change the prognosis for New Orleans, Houston, Biloxi, and other cities along the coast pretty substantially. As it stands, New Orleans may see sustained hurricane force winds on the eastern side of the storm, which is where the worst storm surge will occur. However, a lot can change between now and Monday.

Update: Here’s a map of the official NHC forecast track along with the spaghetti models to demonstrate variability in the landfall locations. Models look roughly at the Texas/Louisiana border all the way to right next to New Orleans, which is a disastrous scenario if that’s the one that comes to pass.

Track and models for Gustav

How I’m Following Gustav

Social media has mobilized throughout the day for getting the word out about Gustav. Twitter is figuring heavily into the mix, as one might expect: I’m following Mark Mayhew, who’s on the ground in New Orleans, as well as The Interdictor Project, one of the several aggregators of information about Gustav being made available this afternoon. (Interdictor may sound familiar to those who followed the Interdictor LiveJournal during Katrina; it was one of the best blogs that was actually on the ground through the duration of the storm.) I’ve also begun following Vanessa (aka iThinkMedia), who’s on the ground in Alexandra, LA, and James Wheeler, who lists his location as the Mississippi Gulf Coast. You can get the big picture using this Twitter search. A centralized Gustav Ning site has been set up for disseminating information and also for coordinate efforts to help folks who may be displaced by the storm. Finally, for you FriendFeeders out there, Wayne Sutton is compiling a list of resources for following Gustav.

Gustav is captivating me not just because of the obvious meteorological aspect, but also how folks are mobilizing so quickly using social media tools to disseminate information. This will be quite a study in social media’s maturity, and it’ll be interesting to see how things turn out.


Hanna the Headache

There’s a lot of eyes on Hurricane Gustav this weekend, and rightfully so — it’s become a Category 3, 125 MPH beast, and the forecast just does not look good for Texas and Louisiana around, unfortunately, New Orleans. Gustav appears to be in position to make this Labor Day weekend a very memorable one for all the wrong reasons. Here’s hoping folks are heeding the call to leave the coast early; the last thing anybody wants to see is a duplication of the tragedy of Katrina three years ago yesterday.

Here in Charleston, we may have a tropical issue of our own to deal with by the end of next week. I’ve been spending a showery morning in West Ashley playing with computer model runs for Tropical Storm Hanna and the end result has been a little heightened concern for our neck of the woods.


Riffing on Gustav and 95L

The last time I spoke of Gustav, it was a rapidly intensifying tropical storm at 60 MPH; it eventually became a hurricane and made landfall on Haiti as a high Category 1 storm. Haiti’s terrain has subsequently torn the storm apart. As of 11:00PM, it’s only packing 45 MPH winds. Pressure’s up significantly to 999 millibars (29.49″ of mercury), and is a total shadow of what it was a day or so ago.

While it’s fairly weak now, Gustav’s going to move back over the water soon — some very steaming hot water to be exact. That, combined with a fairly favorable upper-air setup, will help Gustav get its act back together. The official NHC forecast has it reaching Category 2 and hitting somewhere along the Gulf Coast by Monday night.

These long-range forecasts are tricky. The cone of uncertainty in the five-day in particular is an incredible spread that takes up most of the Gulf. A lot of buzz is being generated because the path currently takes the center extremely close to New Orleans; this, combined with the upcoming three-year anniversary of Katrina, has a lot of folks really worried. Louisiana has already declared a state of emergency well in advance of Gustav’s potential arrival.

If you’ve got interests along the Gulf Coast, it definitely behooves you to watch this thing closely. It really could end up anywhere along the coast at this point.

As for Invest 95, it’s started to flare some convection up, but it’s still awfully hard to identify a circulation and it seems to be a fairly hostile environment at the moment. It’s just drifting around; it’s starting to turn a bit more northwest, but it’s tough to say exactly what it wants to do. Models seem to want to develop it into a Category 1 in a few days and recurve it out dangerously close to Bermuda, but other models also turn it more southward and send it toward Florida. This is, of course, all depending on whether it actually survives. 95’s been in and out of the NHC’s radar, so it’s hanging in there, but it’s still too early to say exactly what it will do beyond bring some rain and wind over the islands.

Oh, and the tornado outbreaks over the last two days in the upstate of SC and into North Carolina? Those were all from the Ghost of Fay. Gotta love systems that overstay their welcome. :)


I Am Gustav, Hear Me Roar (At 60 MPH)

Well, Invest 94 took its sweet time to get going, but once it got going…holy cow. Enter Gustav, which was Tropical Depression Seven at 11am and then blossomed quickly to a 60 MPH tropical storm by 5pm. Like Fay before it, Gustav is expected to rake Hispaniola and Cuba — though this time as a minimal hurricane — with more rain and wind. Thereafter, it gets questionable; some models take it south into the Yucatan, but others take it close to Florida (as if they need anything more) and eventually into the Gulf. The Hurricane Center, so far, favors the more northward trajectory, though there is significant model agreement about the southward trajectory. Like with Fay, time will tell, and it’s going to be interesting to see how the steering sets up later into the week. Unlike Fay, though, no models have pegged Charleston as a primary target of the storm, but that doesn’t mean we shouldn’t watch it. The models have been awfully funky with 94 and weren’t the most reliable with Fay, as we all witnessed.