Dr. Jeff Masters' WunderBlog

Debby lingers in the Gulf, bringing heavy rain, flooding to Florida
Posted by: Angela Fritz, 21:26 GMT le 25 juin 2012 +37
Debby remains a raggedy-looking tropical storm with maximum sustained winds of 45 mph. The hurricane hunter mission that ended around 1pm ET found a minimum central pressure of 995 mb and much weaker winds that it had found on previous missions. Despite Debby's less-than-organized appearance, the storm is still managing to dump buckets on Florida, and in particular today, the panhandle. A burst of thunderstorm activity has exploded on the northern side of Debby, and Tallahassee, Florida and it's southern neighbors are getting the worst of the storm's rain this afternoon as it rotates in place. Weather stations near Tallahassee have recorded anywhere from 2 to 9 inches of rain so far today. The strongest wind speeds reported from buoys are around 30 mph this afternoon. The storm's moisture is still confined to the north and east of the center, as a region of dry air continues to wrap in from the south and west. Visible satellite imagery illustrates just how dry Debby is on the southwest, as well as the strong thunderstorm activity that is expected to continue over Florida for the next couple of days. Debby has begun to create a bit of storm surge in the Apalachee Bay area, with reports from St. Marks, Florida that the storm surge has reached the town, though high tide is not for another 2 hours.


Figure 1. Monday afternoon visible satellite imagery of Tropical Storm Debby.


Figure 2. 5-day forecast rainfall from the Hydrometeorological Prediction Center. Rainfall in excess of 15 inches is expected in northern Florida as Debby makes its slow way across the state and into the Atlantic.

Forecast for Debby
Debby continues to drift to the northeast this afternoon, a track that will continue, slowly, over the next couple of days, before it finally crosses Florida, which will likely happen Wednesday and Thursday of this week. The National Hurricane Center's 5pm forecast track is similar to the tracks from earlier today, though the timing has sped up a bit, with landfall occurring Wednesday afternoon. All of the models now agree that Debby will continue moving northeast and gradually turn to the east as it crosses over Florida into the Atlantic. In terms of intensity, the Hurricane Center is predicting that the storm will remain a storm through Wednesday, after which it will likely diminish to tropical depression status. Given the current state of the storm and the dry air that continues to wrap in, it's possible this could happen earlier than Wednesday. Interestingly, the GFDL is suggesting Debby could gain some strength as it crosses Florida, and the ECMWF's earlier run actually thinks Debby will rapidly intensify when it reaches the yet untapped warm waters of the Gulf Stream in the Atlantic and tracks northeast. It's worth nothing that the ECMWF is the only model suggesting this intensity outcome, though all the models have a similar track. In any case, Debby will remain a rainmaker for the rest of the week, and some storm surge is possible, especially in the Big Bend. The SLOSH model, which predicts storm surge heights, suggests this area could see up to a 6 foot storm surge. The coastal flooding will be the worst in the Apalachee Bay region, where high tide occurs from around 7am to 9am EDT.

Angela
One of Debbie's tornados (whgator3)
Tornado crossing Lk. Winterset in Winter Haven, Fl 6/24 8pm
One of Debbie's tornados
Flooding On Anna Maria (amapp)
This is my sister before the flooding got bad. She's sitting on top of a fire hydrant that's rapidly being swallowed up by the water!
Flooding On Anna Maria
TS Debby Flooding (Rick727)
A series of pictures of flooding in Pasco County Florida from the outer bands of Tropical Storm Debby. Exact locations in the EXIF
TS Debby Flooding
TS Debby Flooding (Rick727)
A series of pictures of flooding in Pasco County Florida from the outer bands of Tropical Storm Debby. Exact locations in the EXIF
TS Debby Flooding
Categories: Hurricane
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751. CybrTeddy 01:52 GMT le 26 juin 2012    
Nino 3.4 predicted to remain El Nino.


Nino 1+2 predicted to absolutely plummet. Might be unrealistic given how sharp the downward turn is.


Nino 3 also to decrease, more gradually.


Nino 4 predicted weak-moderate El Nino
Member Since: 8 juillet 2005 Posts: 253 Comments: 20251
752. CaicosRetiredSailor 01:52 GMT le 26 juin 2012    
IF YOU SEE RAPIDLY
RISING WATER YOU SHOULD SEEK HIGHER GROUND IMMEDIATELY!

well...

duh...
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753. BrickellBreeze 01:52 GMT le 26 juin 2012    
Not letting up anytime soon...

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754. JLPR2 01:52 GMT le 26 juin 2012    
Quoting Tropicsweatherpr:


A decent Tropical Wave that may bring needed rain for some of the islands in the Eastern Caribbean as June has been dry.


Yes, rain. It rained today, I got 0.11 inches add the amazing amount of 0.03 inches that had fallen since the first of June and so far in my area (Carolina,PR) we have gotten 0.14 inches of rain in June. :|

A normal month is around 3.50 inches.
Member Since: 4 septembre 2007 Posts: 7 Comments: 7487
755. charlottefl 01:53 GMT le 26 juin 2012    
A FLASH FLOOD EMERGENCY IS IN EFFECT AND IF YOU SEE RAPIDLY
RISING WATER YOU SHOULD SEEK HIGHER GROUND IMMEDIATELY!

Not too often you see that wording...
Member Since: 18 décembre 2006 Posts: 7 Comments: 2672
756. TropicalAnalystwx13 01:53 GMT le 26 juin 2012    
Quoting cyclonekid:
I miss the old crew though. With Alexandra Steele, Paul Goodloe, Steve Lyons, Dave Shwartz, etc.

I just miss Storm Alert.

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757. Noodoggy 01:54 GMT le 26 juin 2012    
thanx for the reples about the dvorak
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759. KoritheMan 01:55 GMT le 26 juin 2012    
Quoting TropicalAnalystwx13:

I just miss Storm Alert.



We knew stuff was going down anytime we were in SA.
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760. Jedkins01 01:55 GMT le 26 juin 2012    
Quoting charlottefl:

I'm thinking part of it may just be an enhancement from Debby being squeezed between 2 highs. Haven't looked at a surface map recently, but there's gotta be a decent pressure gradient there.



I think so too but still, wind is downright violent by the beach, I could barely stand out there and sand was blown into places I didn't want, it was gusting out there over 60 at times. I'm sure the pressure gradient is some of but it's really crazy either way.

Anyways though, maybe the high rain chances is the eventual expectation of Debby to mix out the dry air aloft and eventually just produce a lot more rain again around here. We'll see with time. It certainly could happen.

Then again I might be speaking too soon. There is a probably a reason most models are increasingly showing really heavy precip totals for our area with more recent runs. I often do speak to soon, lol.
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761. BrickellBreeze 01:56 GMT le 26 juin 2012    
Surprisingly, It appears that banding is on the increase in the gulf.

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762. KoritheMan 01:56 GMT le 26 juin 2012    
Quoting CaicosRetiredSailor:
IF YOU SEE RAPIDLY
RISING WATER YOU SHOULD SEEK HIGHER GROUND IMMEDIATELY!

well...

duh...


It's not a "duh" for some people though. Otherwise, they wouldn't use that kind of wording.
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763. charlottefl 01:56 GMT le 26 juin 2012    

Quoting albertomaster:
nws use new lanuage now too protect property and no be responsibe.
Yeah, just don't expect to see that one used very often. Definitely grabbed my attention...
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764. cyclonekid 01:56 GMT le 26 juin 2012    
Quoting TropicalAnalystwx13:

I just miss Storm Alert.

That too. :-)
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765. TampaFLUSA 01:56 GMT le 26 juin 2012    
Quoting BrickellBreeze:
Not letting up anytime soon...


Nothing really over the water.
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766. Huracaneer 01:57 GMT le 26 juin 2012    
Quoting Jedkins01:


I was out by the beach a couple hours ago, it was frequently gusting 50 to 60 mph, and sustained 40 to 45 mph. It's amazing.

What is really weird is that the NWS is forecasting like 8 inches of rain the next few more days but it seems like they are behind the 8 ball, yesterday the official forecast was literally 1 to 2 inches of rain, but now that they are forecasting high totals for some reason Debby has changed structure and isn't producing hardly any rain on the west coast of Florida now. Don't get me wrong we have had more than enough rain peoples houses are flooded so I'm not complaining I'm just surprised. I realize Debby is very slow moving but forecasts need to be inline with what's really going on. If there were still plenty of heavy bands rotating out there in the gulf I would believe it but rain coverage in the eastern gulf has steadily decreased all day.

One thing that isn't dying is wind though, we are getting consistent gusts into the 40's occasionally 50 to 55 mph and sustained 30 to 35 mph.


I don't even get why we are seeing so much wind this far away from a weak tropical storm.


I was also out on Indian Rocks beach, wow! FLWeatherFreak91 said earlier that we are in the main inflow channel to the center and that's why we got these crazy winds. Makes sense?
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767. KEEPEROFTHEGATE (Mod) 01:57 GMT le 26 juin 2012    
Member Since: 15 juillet 2006 Posts: 143 Comments: 40562
768. Tropicsweatherpr 01:57 GMT le 26 juin 2012    
Quoting JLPR2:


Yes, rain. It rained today, I got 0.11 inches add the amazing amount of 0.03 inches that had fallen since the first of June and so far in my area (Carolina,PR) we have gotten 0.14 inches of rain in June. :|

A normal month is around 3.50 inches.


I got a brief shower this afternoon in Santurce. It also has been above normally warm with 25 onsecutive days of 90+ in San Juan.
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769. BrickellBreeze 01:58 GMT le 26 juin 2012    
Quoting KoritheMan:


We knew stuff was going down anytime SA played.


"Now it's just a shell of what she once was.."
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770. charlottefl 01:58 GMT le 26 juin 2012    
Quoting Jedkins01:



I think so too but still, wind is downright violent by the beach, I could barely stand out there and sand was blown into places I didn't want, it was gusting out there over 60 at times. I'm sure the pressure gradient is some of but it's really crazy either way.

Anyways though, maybe the high rain chances is the eventual expectation of Debby to mix out the dry air aloft and eventually just produce a lot more rain again around here. We'll see with time.
I'd put it at 60/40 60- you'll get more rain, but not anywhere near those modeled amounts. and 40 you'll get enough to cause some serious aggravation of already flooded areas. Maybe 70/30. (Well you get the idea :) )
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771. hurricanehunter27 01:58 GMT le 26 juin 2012    
Quoting BrickellBreeze:
Not letting up anytime soon...

The convection is also starting west while it was moving east. I think it may be trying to expand around the circulation finally.
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772. BrickellBreeze 01:59 GMT le 26 juin 2012    
Quoting TampaFLUSA:

Nothing really over the water.


Yeah, but i was talking about that heavy rain band parked up south of tally.
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773. avthunder 01:59 GMT le 26 juin 2012    
Quoting cyclonekid:
I miss the old crew though. With Alexandra Steele, Paul Goodloe, Steve Lyons, Dave Shwartz, etc.
John Hope...
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774. weatherlover94 02:00 GMT le 26 juin 2012    
Quoting TropicalAnalystwx13:

I just miss Storm Alert.




Storm Alert might come back....we just havent had a major landfall since 08.....i have heard they have retired it but idk because that would kill the ratings if they did do away with it.
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775. RTSplayer 02:00 GMT le 26 juin 2012    
This is the sort of behavior that is so bad when storms stall near Hispaniola or Central America, and you get 30 inches of rain in the mountains.

This is why Mitch killed so many people. Stupid band just sit on your for a week dumping rain by the feet I guess.

Fortunately, Florida doesn't have that sort of topography to make a 20ft wall of inland flood waters rush down a valley somewhere.
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776. BrickellBreeze 02:00 GMT le 26 juin 2012    
Quoting hurricanehunter27:
The convection is also starting west while it was moving east. I think it may be trying to expand around the circulation finally.


She may be trying to fix out that dry air, with that moisture coming from the SW.
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779. AllStar17 02:00 GMT le 26 juin 2012    
Storm Alert on TWC was great coverage. No commercials and no nonsense either, just facts. Now it seems they also worry about useless ratings because NBC owns them. They also have numerous shows on now that I really couldn't care less about watching. Back then they seemingly had 24/7 live weather shows on...even overnight, too (Overnight Outlook, or something?)
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781. charlottefl 02:02 GMT le 26 juin 2012    
And wind has increased quite a bit to the south in Bradenton:

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782. hurricanehunter27 02:02 GMT le 26 juin 2012    
I think the HH are only going to get two center fixes off the entire mission.
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783. JLPR2 02:02 GMT le 26 juin 2012    
Quoting Tropicsweatherpr:


I got a brief shower this afternoon in Santurce. It also has been above normally warm with 25 onsecutive days of 90 in San Juan.


Ah yes, the 90s, at least it stayed in the low 90s today, once it passes 95F it gets incredibly uncomfortable. Sad to see the rain chance dropped to 10% tomorrow and with that big SAL mass moving towards us I doubt we will see rain again for awhile.
That wave at 30w better fire up while it is passing through the area. XD
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784. sunlinepr 02:03 GMT le 26 juin 2012    
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785. KoritheMan 02:03 GMT le 26 juin 2012    

Quoting JLPR2:


That was at 30w better fire up while it is passing through the area.
Watch it flare up after passing the area. :)
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786. Jwd41190 02:03 GMT le 26 juin 2012    
Can Charleston, SC expect any rain from Debby's and if so how much?
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787. ITCZ 02:03 GMT le 26 juin 2012    
{ok..what does poof mean?}

:-) i feel silly asking questions but i wont know the answer til i do!
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788. sunlinepr 02:04 GMT le 26 juin 2012    
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789. Bluestorm5 02:05 GMT le 26 juin 2012    
North Carolina getting slammed by strong thunderstorms tonight... meanwhile how's Debby doing now?
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790. flbeachgirl 02:05 GMT le 26 juin 2012    
Eastbound lanes of I-10 near Lake City are closed due to flooding.

Forecasters calling for an inch of rain per hour overnight for Jacksonville area. Black Creek in Clay County is above flood stage and may reach highest levels in recorded history tomorrow. Shelter has been opened for evacuees.
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791. JLPR2 02:05 GMT le 26 juin 2012    
Quoting KoritheMan:

Watch it flare up after passing the area. :)


This is how I would feel if that happened. Link

(Better link it, don't want to go off topic.)
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793. AllBoardedUp 02:06 GMT le 26 juin 2012    
Quoting KoritheMan:


It's not a "duh" for some people though. Otherwise, they wouldn't use that kind of wording.
If a person doesn't have enough sense to seek higher ground when seeing rising water, then they probably can't read a warning statement in the first place. lol
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794. ITCZ 02:06 GMT le 26 juin 2012    
Quoting albertomaster:
added to ignore list al so you maybe consider adding him to your because hes jason



ah-thanks!!!
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795. KoritheMan 02:06 GMT le 26 juin 2012    

Quoting ITCZ:
{ok..what does poof mean?}

:-) i feel silly asking questions but i wont know the answer til i do!
Poof is a fancy way of saying "You're an idiot and not worth my time." It's another term for the ignore list.
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796. TropicalAnalystwx13 02:08 GMT le 26 juin 2012    
I want to work at the National Hurricane Center.
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797. sunlinepr 02:08 GMT le 26 juin 2012    
GFS keeps Debby alive for 168 hrs...

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798. Bluestorm5 02:08 GMT le 26 juin 2012    
Quoting sunlinepr:


I'm right under these thunderstorms moving southeast in North Carolina... it's pretty strong tonight comparing to typical afternoon storms.
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799. charlottefl 02:09 GMT le 26 juin 2012    
I'm surprised at how much calmer it is in the blog than it was a couple of days ago. Still windy here, not very much rain today though. It's kinda weird having really strong winds and no rain....
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800. ITCZ 02:09 GMT le 26 juin 2012    
Quoting KoritheMan:

Poof is a fancy way of saying "You're an idiot and not worth my time." It's another term for the ignore list.



Appreciate the education. :)
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About JeffMasters
Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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