Andrea Intensifies to a 60 mph Tropical Storm, Spawns 5 Tornadoes in Florida

By: Dr. Jeff Masters , 1:30 PM GMT on June 06, 2013

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Tropical Storm Andrea has exceeded expectations. An Air Force hurricane hunter plane flying through Andrea near 3 am EDT found that a strong band of heavy thunderstorms with moderate turbulence and intense lightning had wrapped partway around the center, and Andrea had intensified into a respectable tropical storm with 60 mph sustained winds and a central pressure of 997 mb. The intensification occurred despite the presence of a large area of dry air to the storm's west, and high wind shear of 25 knots. Satellite loops show that Andrea has expanded in size this morning, and its heavy thunderstorms have become more intense. The heaviest thunderstorms were in a band well away from the center, extending from Tampa southwestwards over the Gulf of Mexico. There is a large slot of dry air behind this band, and Andrea may be able to close this intrusion of dry air off early this afternoon, and build additional heavy thunderstorms near its center. However, given the continued presence of dry air and increasing wind shear, and little time before landfall, it will be difficult for Andrea to reach hurricane strength before landfall occurs early this evening--though I won't rule out intensification to a 70 mph tropical storm. Heavy rains of 3 - 6" that have the potential to cause flash flooding will be the storm's main threat. Carrabelle, near Apalachicola, reported 4.5" of rain in a 5-hour period ending at 8 am EDT. Tornadoes in some of the heavier thunderstorms in Andrea's spiral bands are also a concern, and the storm had already spawned five tornadoes as of 9 am EDT. Bands of heavy thunderstorms with embedded rotating thunderstorms capable of generating tornadoes where over both the west and east coasts of Florida between 6 am - 8am, triggering tornado warnings in the counties near Fort Lauderdale and Tampa Bay. A tornado hit The Acreage in Palm Beach County at 6:45 am EDT, injuring one person, damaging homes, and downing trees and power lines. Two other tornadoes were reported on Florida's east coast, one in Broward County, and one in Palm Beach County. Andrea also spawned two tornadoes southeast of Tampa Bay between 2:30 am and 4 am EDT Thursday, but damage was minor. Most of South and Central Florida are under a tornado watch today. A storm surge of 2 - 5 feet is predicted for Tampa Bay northward to Apalachicola, and rip currents will be a risk for swimmers who brave the high surf. As of 9 am EDT Thursday, our wundermap with the storm surge layer turned on was showing storm surge levels just over 1 foot near Tampa and Apalachicola on Florida's Gulf Coast.

We won't have any new wind measurements from the Hurricane Hunters until about 3 pm EDT. Buoy 42036, 122 miles west-northwest of Tampa, reported sustained winds of 40 mph, gusting to 51 mph, between 7 am - 8 am EDT, when the center of Andrea was located about 60 miles to the south-southwest. Winds at a personal weather station at Bald Point State Park near Apalachicola hit 39 mph at 9 am EDT. Winds at Cedar Key were sustained at 28 mph, gusting to 34 mph, at 8:33 am EDT.



Figure 1. Composite radar reflectivity image of Tropical Storm Andrea at 9 am EDT Thursday, June 6, 2013.

Andrea's place in history
Andrea formed in a typical location for early-season storms. The Gulf of Mexico, Western Caribbean, and Bahamas are the usual areas for the genesis of June tropical storms. Andrea's formation date of June 5 is over a month earlier than the average July 9 date for formation of the season's first named storm. On average, the Atlantic sees one June named storm every two years. In 2012, we'd already had two named storms by this point in the season--Alberto and Beryl. This year is the second time a storm named Andrea has appeared in the Atlantic. The previous incarnation, Subtropical Storm Andrea of 2007, wandered off the U.S. East Coast in May, and never made landfall. The 2013 version of Andrea is highly unlikely to get its name retired, and we'll be seeing a third coming of the storm in 2019.

Jeff Masters

Andrea gave us a lake (LakeWorthFinn)
... in our yard this morning
Andrea gave us a lake

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Rotation over Pinellas Park now.
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A lot of Tornado watches are up:

Brevard Broward Charlotte
Citrus Collier DeSoto
Glades Hardee Hendry
Hernando Highlands Hillsborough
Indian River Lake Lee
Manatee Martin Miami-Dade
Okeechobee Orange Osceola
Palm Beach Pasco Pinellas
Polk St. Lucie Sarasota
Semenole Sumter

Read more here: http://weather.herald.com/US/FL/Miami.html#storyli nk=cpy
Member Since: March 10, 2006 Posts: 0 Comments: 10067
Strong Due east jog visible in the last 3 frames may indicate a change in overall motion though that remains to be seen.

Storm looks like some nasty hybrid cross between warm and cold core this morning, except its still all warm core. Nonetheless, still intensifying.
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Quoting Chapelhill:
He said,"I will be on assignment in Sochi, Russia." So guess TWC is making a new doom series.

Hmm. Okay
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Quoting flcanes:

First of all, why is he even in Russia?
He said,"I will be on assignment in Sochi, Russia." So guess TWC is making a new doom series.
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Quoting hydrus:

Thats a lot of *ahem* rocket fuel
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Quoting LargoFl:
guys this is getting bad around here..the tree's are really swaying and the rain is swirling and the sky is getting darker..and tornado's nearby..oh oh lol..


You getting winds over 40mph+
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Some cooler water ahead. Probably does not mean much.
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Quoting LargoFl:
guys this is getting bad around here..the tree's are really swaying and the rain is swirling and the sky is getting darker..and tornado's nearby..oh oh lol..

Oh god (temporarily runs to closet under the stairs with laptop in hand)
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Quoting Autistic2:
Ok who has actually eaten crow? I did one in Puerto Rico, I think it was crow. It was actually pretty good but then I was really hungry too....
Crow aint so bad... Summer Crow Kabobs
submitted by Gordon Krause (The CrowMaster)
Ingredients
16 pieces of crow breast meat (no bones) (8 crows)
16 pieces of green pepper
16 cherry tomatoes
8 button mushrooms
8 ears of sweet corn
1 1/2 cups of Teriyaki sauce
1/2 cup melted butter
8 kabob skewers
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Quoting FunnelVortex:


Three hours until impact?

Nah. 6 minimum unless this really speeds up
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guys this is getting bad around here..the tree's are really swaying and the rain is swirling and the sky is getting darker..and tornado's nearby..oh oh lol..
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Maybe it's just a wobble eastward, but the general track as seen on radar seems to be east of the projected track. Andrea could come ashore anywhere from Pasco County to Citrus County if it doesn't turn more towards the northeast soon.
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Quoting russh46:



Because there is a tropical system in Florida. Don't you know he always goes the other direction from storms.

Okay.....
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Quoting flcanes:

First of all, why is he even in Russia?



Because there is a tropical system in Florida. Don't you know he always goes the other direction from storms.
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Quoting LargoFl:
Clearwater Beach cam............

Is that a funnel cloud in the backround?
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Quoting StormTrackerScott:
Getting real close to Tampa now.



Three hours until impact?
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107. JLPR2
Quoting Autistic2:
Ok who has actually eaten crow? I did one in Puerto Rico, I think it was crow. It was actually pretty good but then I was really hungry too....


You ate what here?
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I think some people owe some people an apology... Given today's readings on TS Andrea.

(and I am not owed anything - just saying)
Member Since: March 10, 2006 Posts: 0 Comments: 10067
Clearwater Beach cam............
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Quoting StormTrackerScott:
Getting real close to Tampa now.


Id give it maybe another 8-9 hours before landfall
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Getting real close to Tampa now.

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Quoting bethie:
Good Morning from Tallahassee, Florida.
Gentle tropical rains started here about 8am (eastern).
Jim Cantore tweeted that he is in Russia.
What is a tropical event without Jim ?!?
As always, thanks for the information everyone !!
Stay safe...

First of all, why is he even in Russia?
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Quoting barbamz:
Short hello from far away: Looking at the radar loops of Tampa I guess our Chicklit won't be able to play tennis today ;-) Yesterday she was wondering whether she could ... Stay safe everybody!

You too.
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Good Morning from Tallahassee, Florida.
Gentle tropical rains started here about 8am (eastern).
Jim Cantore tweeted that he is in Russia.
What is a tropical event without Jim ?!?
As always, thanks for the information everyone !!
Stay safe...
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Short hello from far away: Looking at the radar loops of Tampa I guess our Chicklit won't be able to play tennis today ;-) Yesterday she was wondering whether she could ... Stay safe everybody!

In the background I hear the thunder via the Port Canaveral webcam ...
Member Since: October 25, 2008 Posts: 53 Comments: 5917
Quoting StormTrackerScott:


Radar estimating 60 to 70 mph wind gust moving toward the Tampa Bay area. Tampa is about to get rocked!


Rocked like a hurricane!
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Quoting StormTrackerScott:


Radar estimating 60 to 70 mph wind gust moving toward the Tampa Bay area. Tampa is about to get rocked!

Storm surge now 3-4 feet with potential wave heights of up to 6 feet
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Tornado Warning for Pinellas County, Largo included in the warning. Cell currently over Gulfport and St. Pete Beach.
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Quoting VR46L:


Stay safe Largo ....You are probably on the dirty side of the storm on Landfall


Radar estimating 60 to 70 mph wind gust moving toward the Tampa Bay area. Tampa is about to get rocked!
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Quoting GeorgiaStormz:
the NAM always said the northern side would organize before landfall ahead of frontal moisture, but dang, that was some fast organization..

Imagine if it were moving slower and this was the middle of august.....
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Quoting Autistic2:
Ok who has actually eaten crow? I did one in Puerto Rico, I think it was crow. It was actually pretty good but then I was really hungry too....


I have. We used to hunt them to keep them out of my grandfathers crops. We ate them deep fried and covered in gravy. Taste like most wild game.
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the NAM always said the northern side would organize before landfall ahead of frontal moisture, but dang, that was some fast organization..
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Quoting VR46L:


Stay safe Largo ....You are probably on the dirty side of the storm on Landfall
thanks im watching it closely..so many people just went to work and arent..hope it dont get too bad around here.
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Quoting StormTrackerScott:


Look at the radar loop I just posted. it's moving almost due east.

It's gonna make landfall maybe, i dont know 60-100 miles north of tampa
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We had a couple of windy days in Colorado last week that brought down some dead trees in our woods. Both of these northeast Gulf stations are having windier days today...

Pensacola Bouy:



West Tampa Bouy:

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GOES Imager Cloud Top Pressure
June 06, 2013 - 12:45 UTCGOES Imager Spectral Difference
June 06, 2013 - 12:45 UTCTampa Bay, FL (KTBW) - Base Reflectivity (0.5)
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Quoting StormTrackerScott:
This is a worst case track for Tampa if this was a major cane. Even still Tampa can expect a significant storm surge now that the center appears to be coming that way.



It's almost closed off.
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Ok who has actually eaten crow? I did one in Puerto Rico, I think it was crow. It was actually pretty good but then I was really hungry too....
Member Since: August 29, 2008 Posts: 0 Comments: 458
Quoting GeorgiaStormz:


it's going NE not to tampa

It just started moving towards the ENE and maybe there is a little East in it
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Quoting GeorgiaStormz:


it's going NE not to tampa


Look at the radar loop I just posted. it's moving almost due east.
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Quoting LargoFl:
trees are swaying now with these strong gusts and rain is really coming down.


Stay safe Largo ....You are probably on the dirty side of the storm on Landfall
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Quoting floridastorm:
The two biggest changes in watching is the strength of the storm and the direction. It appears to be moving more towards the east which create more problems for the peninsula of Florida. The other factor is the strength. Will it become our first hurricane? And will the come shift south and east? Opinions?
you know something..there WAS a model this morning that had it come in just north of Tampa..gee if that verifies, it might get worse around here later on..dont take your eyes off this storm tmpa bay area northward.
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Quoting StormTrackerScott:
This is a worst case track for Tampa if this was a major cane. Even still Tampa can expect a significant storm surge now that the center appears to be coming that way.


Imagine if this was august, and this was a cat 3 (an actual cat 3), with large reserves of warm water with little to no shear and no dry air, talk about worst case scenario
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Quoting StormTrackerScott:
This is a worst case track for Tampa if this was a major cane. Even still Tampa can expect a significant storm surge now that the center appears to be coming that way.



it's going NE not to tampa
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Quoting FIUStormChaser:
If you are in South Florida, watch out for developing Supercells with embedded tornados forming in between the two large bands:


I am just curious are these anywhere around Boynton beach right now?
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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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