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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Quoting hydrus:
I would bet that there are people on tha sticks gettin gnarley in the soup.
Can you translate that Hydrus?

:)
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Quoting depalma13:


No it doesn't. I remember a very strong tropical storm that fell apart before it made landfall in Cedar Key. Didn't get any rain or wind that night and there were tropical storm warnings up all day.


Generally speaking. The point was once it's in the Gulf, it can be a threat..
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it looks like the storms have wrapped around the low completely now...
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Quoting TBayEyes:
Downtown st. pete. Feeling the most intense effects so far. Rain has picked up a lot and winds are swirling.
I would bet that there are people on tha sticks gettin gnarley in the soup.
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If you don't like the way WU is ran, there's the door, simple as. For me though it's hurricane season, there's a system hitting Florida and the blog is at its best.
Member Since: July 8, 2005 Posts: 259 Comments: 24167
Quoting charlottefl:
1 lesson I think can be learned from this though, and one I've always stuck to. Not saying that every storm that gets in the gulf blows up quickly, but never underestimate a storm in the Gulf, cause unlike the Atlantic, once it gets in there, it has to landfall somewhere..


No it doesn't. I remember a very strong tropical storm that fell apart before it made landfall in Cedar Key. Didn't get any rain or wind that night and there were tropical storm warnings up all day.
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Quoting Dakster:


Notice that you are not under any Tornado/watch warnings and that the warnings that are out are all on the EAST side of Andrea...


Oh yes, and I love it. I've been 'in' two tornados and had close calls with several. Ironically, the two I was in were in Louisiana, and lived five years in Kansas with only one close call there.
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Tropical Storm Andrea Discussion Number 4
Statement as of 11:00 am EDT on June 06, 2013

init 06/1500z 28.2n 84.3w 50 kt 60 mph


I do not like the NHC's center fix ... looks to be further south on the radar.
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Patrap -Wobble, wobble...

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You need to call friends and relatives around the potential landfall area and let them know what is coming. Looking at GateKeepers post below, hard not to notice that the Cross City region appears to be in the Cross-Hairs....
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Quoting wxchaser97:
Andrea stays 60mph.
Wasn't expecting to see a strong TS this morning.


Andrea= Moderate Tropical Storm 60mph

Low end 40-45
Med end 50-60
Strong end 65-70

close enough
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Where is Kiwigirl?.
Member Since: August 14, 2010 Posts: 10 Comments: 17074
Quoting MississippiWx:


I would much rather see 900 straight radar posts than to see you complaining about what other people post all the time.
Looks like we need a radar for the radar posts!
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Who called 70mph yesterday?

I said everyone should go ahead and prepare for 70mph, but I didn't actually "call" 70mph.

I know at least one person was saying 70mph max intensity repeatedly.

Since none of the models or experts said anything anywhere near that, and the official forecast was like 40 to 45mph, I'd say calling 70mph makes him more accurate than the pros.


I don't know what the deal is with NHC, but they consistently under-rate storms' max intensities in their forecasts, by about 15 to 20mph, or about a full category worth.
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Downtown st. pete. Feeling the most intense effects so far. Rain has picked up a lot and winds are swirling.
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live mobile video stream.... getting hammered on Siesta Key. Surge flooding road.
Live Stream
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WPTV
Chopper 5 is giving us a look at damage from a possible tornado in The Acreage.

CLICK HERE TO WATCH THE LIVE VIDEO: http://bit.ly/bpouEn
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College of DuPage Meteorology

Severe Weather and Flash Flood Warnings

Note: This page will reload every 2 minutes. Warnings are listed with the most recent first.

Click on the station ID to bring up list of recent severe weather statements.

SVR T-STORM WARNING SHREVEPORT LA - KSHV 925 AM CDT THU JUN 6 2013

TORNADO WARNING MELBOURNE FL - KMLB 1018 AM EDT THU JUN 6 2013

SVR T-STORM WARNING SHREVEPORT LA - KSHV 901 AM CDT THU JUN 6 2013

TORNADO WARNING TAMPA BAY AREA - RUSKIN FL - KTBW 958 AM EDT THU JUN 6 2013
TORNADO WARNING MIAMI FL - KMFL 828 AM EDT THU JUN 6 2013

SVR T-STORM WARNING SHREVEPORT LA - KSHV 723 AM CDT THU JUN 6 2013
SVR T-STORM WARNING SHREVEPORT LA - KSHV 707 AM CDT THU JUN 6 2013
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Cedar Key...Station CDRF1
NDBC
Location: 29.136N 83.029W
Date: Thu, 06 Jun 2013 14:00:00 UTC
Winds: E (100°) at 28.9 kt gusting to 33.0 kt
Atmospheric Pressure: 29.72 in and falling
Air Temperature: 73.4 F
Dew Point: 71.4 F
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Quoting TropicalAnalystwx13:
Radar indicates there are some higher velocities (~70 knots) in the southeast eyewall. This may be nearing hurricane intensity. Nearing.

Nearing.

Now reflectivity:



OMG. I can't believe you think it's a hurricane. Are you crazy?!

;-)
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Quoting washingtonian115:
BTW Al Rocker is the laziest weather man out there.Now back to tracking Andrea.


Al is just plain annoying. Did you see what he did yesterday morning? I just facepalmed.
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Quoting hydrus:
gee hydrus, in that pic the center is much closer to me than before,maybe thats why the bands are getting stronger here along the coast..
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On june 28 the 2005 seeason went into overdrive...from then it was july 4, 5, 11, 18, and 24........so we'll have to see if we can beat that pace.


Dennis and Emily are practically forgotten from 2005 and Dennis was a major US storm
Member Since: February 11, 2012 Posts: 0 Comments: 9731
Station 42036
NDBC
Location: 28.500N 84.517W
Date: Thu, 06 Jun 2013 13:50:00 UTC
Winds: ENE (70°) at 25.3 kt gusting to 36.9 kt
Significant Wave Height: 11.2 ft
Dominant Wave Period: 8 sec
Mean Wave Direction: S (170°)
Atmospheric Pressure: 29.60 in and steady
Air Temperature: 74.1 F
Dew Point: 72.0 F
Water Temperature: 76.8 F
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Relatively nice day on the dry west side of this system. Fairly high water with the tide this AM (note wrack line) and relatively big surf for our area.

Live cam on Pensacola Beach:

Link
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Keep 'em coming Hydrus. rofl!
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1 lesson I think can be learned from this though, and one I've always stuck to. Not saying that every storm that gets in the gulf blows up quickly, but never underestimate a storm in the Gulf, cause unlike the Atlantic, once it gets in there, it has to landfall somewhere..
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Just completed my 40 mile commute south into Tampa. I debated staying home but after watching local media (who I now feel are down playing the conditions) was thinking "It's just rain". Well it wasn't just rain. It was HEAVY rain and STRONG winds. My fingers had pins and needles from gripping the steering wheel so tight.

I really wish I had stayed put. Now I will spend the day worrying about the ride home.

I took pictures Tuesday of water level in the lake out back. This morning it is definately quite higher. I will take picture when this is past for comparison. Last year with Debby we worried about it coming up into the house and had to sand bag. This year it was way low before this started so not worried about that.

We definately need this rain, but I would be enjoying it more if I stayed home.
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BTW Al Rocker is the laziest weather man out there.Now back to tracking Andrea.
Member Since: August 14, 2010 Posts: 10 Comments: 17074
Quoting wxchaser97:
Andrea stays 60mph.
Wasn't expecting to see a strong TS this morning.


go back to class
Quoting washingtonian115:
I'm afraid the weather channel isn't what it use to be.


isn't it sad?
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Quoting aislinnpaps:


Yes, but I do love to sit and listen to the rain and thunder. But I was gone for two weeks and came back to six inches of grass in my newly made and planted flower garden, about 90 feet x 3 feet. I have about 1/3 of it weeded out, so this new rain will be a blessing and a curse: make it easier to pull the grass out by the roots, but the grass will be increasing...


Notice that you are not under any Tornado/watch warnings and that the warnings that are out are all on the EAST side of Andrea...
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wow this band of storms is strong the rain is swirling and the tree's gee......i hear there was damage from that tornado around here..tree's down and a road is blocked and damage to a resturant etc.....
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Also note, per radar, that Andrea has jogged to the NE quite a bit......Could make landfall just below the Big Bend on the Forgotten Coast......
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Quoting washingtonian115:
I'm afraid the weather channel isn't what it use to be.


Neither is Wunderground.

This site is just a mirror site for NWS and AGW alarmist sites, plus a few links to some independent sites and universities.

If not for the bloggers, there wouldn't even be any real information on this site.

Example:

The amateur bloggers gave more accurate intensity forecasts, and more accurate center fixes than the pros.

I bet if they removed the ability of users to make posts, almost nobody would even bother visiting this site.
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#321 - At least it isn't a pinhole eye.
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Quoting MississippiWx:


Lol. As soon as NBC took over TWC, weather was no longer a priority for The Weather Channel.


Nope. Have crap like Coast Guard, Lifegaurd, Prospectors, and now that fishing show.
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Member Since: July 12, 2007 Posts: 0 Comments: 6049
it will make landfall in no more than 8 hours and no less than 5
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Quoting SouthernIllinois:
Ainslinnpaps ~ You sure a getting a soaking over in Louisiana today! Wow.


Yes, but I do love to sit and listen to the rain and thunder. But I was gone for two weeks and came back to six inches of grass in my newly made and planted flower garden, about 90 feet x 3 feet. I have about 1/3 of it weeded out, so this new rain will be a blessing and a curse: make it easier to pull the grass out by the roots, but the grass will be increasing...
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Quoting TropicalAnalystwx13:
Radar indicates there are some higher velocities (~70 knots) in the southeast eyewall. This may be nearing hurricane intensity. Nearing.

Nearing.

Now reflectivity:


This situation is similar to Beryl, but on the opposite side of Florida.
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Wow...the sun is out for the first time since I can remember here in Palm Beach. Not sure if that's a good thing or not.
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324. 7544
Quoting SFLWeatherman:
Tornado Watch for Broward, Indian River, Martin, Okeechobee, Palm Beach and St. Lucie County in FL until 10:00pm.


yeap and look at that long tail forming to her south this is goin east and now the se fl coast may see some action latter on today but how strong remains to be seen they calling for 3 to 5 inches up to 8 in some areas so far it mostly dry from last night we shall se what hapens
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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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