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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That didn't work the way I wanted it to...
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1523. 10Speed
Quoting Patrap:
Backo....

Heavy Rain now, bad squall..but no Nado formed.

Thanks for the update and welcome back Pat!!!!
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I know it is has to pass through as John Hope used to say the Dagger of death shear, but with the oscat supporting a closed circulation, imo 92L is probably a 45mph Tropical Storm at the moment.
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1521. KEEPEROFTHEGATE (Mod)
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1520. Patrap
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Quoting GeoffreyWPB:
92L...

Getting Organized,my be named.
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1518. Patrap
Backo....

Heavy Rain now, bad squall..but no Nado formed.
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1517. gator23
Still under a tropical storm warning here in GVILL NWS calling for 40 mph wind. NO IDEA WHY though. Radar says its over.
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92L...

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fun time skimboarding today with Friends!:) Tropical Storm ANDREA Flooding = day off work fun!
Member Since: May 23, 2012 Posts: 0 Comments: 4392
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Quoting Patrap:
Lowering waLL Cloud due south of Midtown NOLA> Logging off..seeking shelter,,,


Wow! Stay safe there Pat!!!
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06/06/2013 0600 PM

7 miles SW of Dock Junction, Glynn County.

Funnel cloud, reported by 911 call center.


Georgia Highway patrol reported a funnel cloud near
Interstate 95. Report relayed through the 911 center.
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1510. sar2401
Quoting UKHWatcher:


Your own comment at 1465 was entirely personal and not weather related... T.S. Andrea is!

First, it was a joke.
Second, I was quoting from "Rules of the Road" here
Third, I was giving Barb a more common English usage of her German phrase.
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1509. 10Speed
Quoting Patrap:
Lowering waLL Cloud due south of Midtown NOLA> Logging off..seeking shelter,,,



Take care!!!!
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... A Tornado Warning remains in effect until 630 PM EDT for central
Glynn County...

At 623 PM EDT... Weather Service Doppler radar continued to indicate a
severe thunderstorm with strong rotation. This tornado was located
near Dock Junction... moving north at 30 mph.

Other locations in the warning include but are not limited to
Everett.

Precautionary/preparedness actions...

When a Tornado Warning is issued based on Doppler radar... it means
that strong rotation has been detected in the storm. A tornado may
already be on the ground... or is expected to develop shortly. If you
are in the path of this dangerous storm... move indoors and to the
lowest level of the building. Stay away from windows. If driving... do
not seek shelter under a Highway overpass.


A Tornado Watch remains in effect until 1000 PM EDT Thursday evening
for northeastern Florida and southeast Georgia.


Lat... Lon 3133 8148 3132 8148 3128 8149 3122 8149
3116 8155 3119 8165 3144 8164 3145 8163
3136 8152
time... Mot... loc 2223z 164deg 25kt 3125 8159
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1507. MTWX
Quoting GreyJewel:
RE: 1488

What happens when that Louisiana weather system and Andrea touch?

Andrea is already stripping the storms off of the weaker system.

Link
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1506. Patrap
Lowering waLL Cloud due south of Midtown NOLA> Logging off..seeking shelter,,,
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RE: 1488

What happens when that Louisiana weather system and Andrea touch?
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Quoting TampaSpin:
How many of you owe the CMC MODEL an apology......LOL


Looks like the CMC's update may pay dividends...or it may have gotten lucky?...Time will tell.
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92L is heading my way... Lol it will be a naked swirl well before and we won't get a drop as usual.
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And the hits just keep on comin'...





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1500. barbamz
Quoting mitthbevnuruodo:


She sure took her sweet time being she was forecast to make landfall much earlier and jet off north with the trough. Uncomforming til the last! My thoughts were along Wash and others, that I didn't think she'd do more than 5omph...but, I'm also with those who say that there are no definites when it comes to tropics. So was both surprised and not surprised by her intensification!

Otherwise, that invest is the cutest lil' blob in the Atlantic!

We've been having summer in North Wales all week. Clear, sunny and scraping 70'. Too hot in the Sun for me LOL But no waves at the beach to make it worth it. The things I planted in the garden are starting to look good though, with the addition on some pumpkin plants sprouting now!


Really glad for you, Mitth (and in Germany it has been nice too, despite of the flooding in the East). But eventually the remnants of Andrea might come to you (and me, maybe) ...
Member Since: October 25, 2008 Posts: 51 Comments: 5676


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1498. etxwx

Severe Thunderstorm Warning
TXC241-457-062300-
/O.CON.KLCH.SV.W.0067.000000T0000Z-130606T2300Z/
JASPER TX-TYLER TX-
505 PM CDT THU JUN 6 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR TYLER AND NORTHWESTERN JASPER COUNTIES...

AT 459 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF SEVERE THUNDERSTORMS ON RADAR CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 23 MILES NORTH OF ROCKLAND
TO ROCKLAND TO 20 MILES SOUTHWEST OF IVANHOE..MOVING EAST AT 30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
WOODVILLE BY 520 PM CDT...
IVANHOE BY 535 PM CDT...
EBENEZER BY 545 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN. STAY INDOORS...
AWAY FROM WINDOWS.

CONTINUOUS LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...WHEN THUNDER ROARS...GO INDOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
THURSDAY EVENING FOR SOUTHEAST TEXAS.
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1497. KEEPEROFTHEGATE (Mod)


rain up and down entire east coast except for maine
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1496. sar2401
Quoting TropicalAnalystwx13:
Just something to keep in mind.

Subject: G7) Does an active June and July mean the rest of the season will be busy too?

...

However, as shown in (Goldenberg 2000), if one looks only at the June-July Atlantic tropical storms and hurricanes occurring south of 22�N and east of 77�W (the eastern portion of the Main Development Region [MDR] for Atlantic hurricanes), there is a strong association with activity for the remainder of the year. According to the data from 1944-1999, total overall Atlantic activity for years that had a tropical storm or hurricane form in this region during JJ have been at least average and often times above average. So it could be said that a JJ storm in this region is pretty much a "sufficient" (though not "necessary") condition for a year to produce at least average activity.

Link

Although Andrea formed well west of 77W, away from MDR. 92L meets the profile but is not, at least technically, a TS.
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Quoting barbamz:


Quoting myself: Lows are cheaper! If you are looking for a birthday present for your better half, move on!

Hoch (High pressure system) 299,- Euro
Tief (Low pressure system) 199,- Euro


Awww, if I had loads of expendable cash, that would be ace!
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Quoting KEEPEROFTHEGATE:
now we got to wait for it to drag itself back out over the atlantic see what it does on that side


It might not reemerge... NHC forecasting it to stay over land, as well as the model consensus.

Making a new blog.
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Quoting CybrTeddy:


You overlooked the fact that the area of highest winds were confined well away from your area.


I will think of that as a good thing. I already hear people talking about how everyone always talks up these storms. They say they wont ever leave for one. I tried to explain that a TS is a far cry from cat 3 or more.

All I hear is I left for Floyd. Ran out of gas and it never came. This aint New Orleans and they are not really that bad!

Hope this does not add to much to that attitude that "it's just a big puff of wind".
Member Since: August 29, 2008 Posts: 0 Comments: 455
Quoting Patrap:

...ANDREA MAKES LANDFALL ALONG THE FLORIDA BIG BEND...

5:45 PM EDT Thu Jun 6
Location: 29.5N 83.4W
Moving: NE at 17 mph
Min pressure: 993 mb
Max sustained: 65 mph


She sure took her sweet time being she was forecast to make landfall much earlier and jet off north with the trough. Uncomforming til the last! My thoughts were along Wash and others, that I didn't think she'd do more than 5omph...but, I'm also with those who say that there are no definites when it comes to tropics. So was both surprised and not surprised by her intensification!

Otherwise, that invest is the cutest lil' blob in the Atlantic!

We've been having summer in North Wales all week. Clear, sunny and scraping 70'. Too hot in the Sun for me LOL But no waves at the beach to make it worth it. The things I planted in the garden are starting to look good though, with the addition on some pumpkin plants sprouting now!
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1491. barbamz
Quoting barbamz:
Concerning the names for lows and highs in Germany I just found this advertisement in german language (you can buy those names f.e. for your loved ones, lol):
"There are still attractive letters for low pressure areas available!"
This year male names would be used for lows ...


Quoting myself: Lows are cheaper! If you are looking for a birthday present for your better half, move on!

Hoch (High pressure system) 299,- Euro
Tief (Low pressure system) 199,- Euro
Member Since: October 25, 2008 Posts: 51 Comments: 5676
Quoting Torito:
still looks OK to me, i guess... it has seen better days...

92L


Definitely seen better days... as the center gets ripped out from under the convection...
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1487. barbamz
Concerning the names for lows and highs in Germany I just found this advertisement in german language (you can buy those names f.e. for your loved ones, lol):
"There are still attractive letters for low pressure areas available!"
This year male names would be used for lows ...
Member Since: October 25, 2008 Posts: 51 Comments: 5676
Quoting Tygor:
Not to compare disasters or anything, but the funnel clouds in Florida are absolutely nothing compared to what we've seen on the blog the last couple weeks in Oklahoma. Too bad people that get hit by tornadoes don't have a few days advanced notice like hurricane victims do :(

Someday maybe we'll see more advanced notice on tornadic storms, and there already is a lot more notice than even 10 years ago.
I just posting pictures cuz it's not so often here..but I don't think we will ever get them like over there!no comparison for sure!
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Jacksonville KCRG observations
Member Since: August 6, 2007 Posts: 24 Comments: 2689
1483. Patrap
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Quoting Autistic2:
It has been beautiful sunshine here in St. Aug for two hours now. No rain and not a leaf moving.

1. Did the storm fall apart before land fall?
2. Is it over now for St. Johns county?
3. I looked on radar and did not see anything very much.

NHC went from 60 to 65.

What am I overlooking?


You overlooked the fact that the area of highest winds were confined well away from your area.
Member Since: July 8, 2005 Posts: 259 Comments: 23590
1481. HadesGodWyvern (Mod)
Philippines Atmospheric Geophysical Astronomical Services and Administration
Tropical Cyclone Outlook
5:00 AM PhST June 7 2013
==============================

At 4:00 AM PhST, a Low Pressure Area estimated at 460 km east of Borongan City, Eastern Samar (12.0N 130.0E).

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1479. Patrap
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Quoting sar2401:

Rule 6. No comments that contain only personal notes such as, "Good Morning!", or "You've got mail, X".

Now youse is going to get a one minute ban. :-)


Your own comment at 1465 was entirely personal and not weather related... T.S. Andrea is!
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1477. KEEPEROFTHEGATE (Mod)


well first one down wunder when the next one forms

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1476. Patrap
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I don't mean to bash the NHC..But they have failed with 92L...
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It has been beautiful sunshine here in St. Aug for two hours now. No rain and not a leaf moving.

1. Did the storm fall apart before land fall?
2. Is it over now for St. Johns county?
3. I looked on radar and did not see anything very much.

NHC went from 60 to 65.

What am I overlooking?
Member Since: August 29, 2008 Posts: 0 Comments: 455

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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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