Dr. Jeff Masters' WunderBlog

Category 2 Sanba closes in on Korea; 92L enters the Lesser Antilles
Posted by: Dr. Jeff Masters, 2:40 PM GMT on September 16, 2012 +32
The winds are rising in Busan, South Korea, and heavy rain is lashing the Korean Peninsula and Southern Japan as Category 2 Typhoon Sanba steams northwards at 22 mph. Sanba pounded Okinawa, Japan early Sunday morning local time as a Category 3 storm with 120 mph winds, but no casualties or heavy damage has been reported thus far. Radar loops show that the large 35-mile diameter eye of Sanba passed over the northern part of Okinawa. Oku, on the northern tip of the island, experienced the eyewall, and recorded a gust of 124 mph (55.3 m/s). At Kadena Air Force Base, the eye of Sanba missed, passing just to the north. The winds peaked at 56 mph, gusting to 77 mph, at 8:30 am local time, after the eye passed to the northeast, and the base received 6.30" of rain. High wind shear of 25 - 35 knots is now affecting Sanba, and satellite loops show that the typhoon is weakening, with the cloud tops warming and dry air wrapping into the core. Radar out of Korea shows that heavy rains from Sanba cover most of the Korean Peninsula, and heavy rain is likely to be the main threat from Sanba in Korea. Sanba will continue to weaken as it encounters cooler waters and higher wind shear today, and is likely to be at Category 1 strength at landfall in South Korea near 22 UTC on Sunday.


Figure 1. Radar image of Typhoon Sanba over Okinawa at 6:25 am local time Sunday September 16, 2012. Image credit: Japan Meteorological Agency.


Video 1. Raw video of Typhoon Sanba hitting Okinawa, taken by storm chaser James Reynolds.

Sanba: the strongest tropical cyclone of 2012
Sanba became a Category 5 Super Typhoon with 175 mph winds for an 18-hour period ending at 12 UTC Friday, September 14, making it Earth's only Category 5 tropical cyclone so far in 2012 (there were two Category 5 storms in 2011, both in the Western Pacific.) The previous strongest tropical cyclone of 2012 was Super Typhoon Guchol, a Category 4 storm with top winds of 150 mph east of the Philippines in June. Sanba is the strongest typhoon in the Western Pacific since October 2010, when Super Typhoon Megi's sustained winds hit 180 mph.


Figure 2. Super Typhoon Sanba at peak strength, as seen at 04:50 UTC September 13, 2012, by the MODIS instrument on NASA's Aqua satellite. At the time, Sanba was a Super Typhoon with sustained winds of 175 mph and gusts to 205 mph. The spectacular eye of Super Typhoon Sanba featured two counter-rotating eddies at the surface. Image credit: NASA. NOAA's Environmental Visualization Laboratory has a spectacular large-scale image of Sanba at Category 5 strength.

Invest 92L entering the Lesser Antilles
A tropical wave (Invest 92L) entering the Lesser Antilles Islands is moving west at 15 mph, and is bringing heavy rain showers and gusty winds to the islands today. The wave is under a moderate 10 - 20 knots of wind shear, and has only a small amount of heavy thunderstorm activity, due to a large area of dry air surrounding the system. The amount of heavy thunderstorm activity has decreased since Saturday. The latest SHIPS model forecast predicts shear will fall to the 10 - 15 knot range Monday through Wednesday, which will favor development. However, the atmosphere over the Caribbean is unusually dry and stable, and this will make it difficult for 92L to organize quickly. 92L will bring heavy rain showers to the Dominican Republic and Haiti on Wednesday, Jamaica and eastern Cuba on Thursday, the Cayman Islands and Central Cuba on Friday, and Mexico's Yucatan Peninsula and Western Cuba on Saturday. The 06Z run of the NOGAPS models indicates some weak development of 92L once it reaches the Western Caribbean, but none of the other reliable models develop the system. In their 8 am EDT Tropical Weather Outlook, NHC gave the wave a 20% of developing into a tropical depression by Tuesday morning. A hurricane hunter aircraft is on call for Monday afternoon to investigate the storm, if necessary.


Figure 3. Morning satellite image of Invest 92L.


Hurricane Nadine headed towards the Azores Islands
Hurricane Nadine is heading eastward on a track that may bring the storm close to the Azores Islands on Wednesday. However, steering currents for Nadine are expected to collapse by Wednesday, and the storm will likely wander for many days in the Central Atlantic.

Jeff Masters
Categories: Hurricane
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701. canehater1 4:50 AM GMT on September 17, 2012    
Hurricane Nadine headed towards the Azores Islands
Hurricane Nadine is heading eastward on a track that may bring the storm close to the Azores Islands on Wednesday. However, steering currents for Nadine are expected to collapse by Wednesday, and the storm will likely wander for many days in the Central Atlantic.

From Dr. M.

Got me to wondering...what is the record for the
number of advisories issued for a Tropical Cyclone?
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702. guygee 4:56 AM GMT on September 17, 2012    
Quoting canehater1:
Hurricane Nadine headed towards the Azores Islands...
Got me to wondering...what is the record for the
number of advisories issued for a Tropical Cyclone?
That would be 2002 Hurricane Kyle with 89 advisories, including a classic from Avila that was like, "I give up!"
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704. weatherbro 5:11 AM GMT on September 17, 2012    
Quoting SFLWeatherman:
One of the 12Z GFS ENSEMBLE That is 92L


That front looks poised to clear the Florida Peninsula!!!
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705. guygee 5:14 AM GMT on September 17, 2012    
Quoting KEEPEROFTHEGATE:
compare ice minimum year 2007/2012

Nice comparison Keeper. Big loss in extent for 2012, even bigger loss in ice volume and multi-year ice. Notice the tongue of ice near NE Greenland in both years is near normal extents...that is where ice gets pushed out into the warmer Atlantic by the cross-polar flow.

Edit - The climate models have been way too conservative with the loss of Arctic ice in the summer, since all of the positive feedbacks are not taken into account.
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706. Slamguitar 5:46 AM GMT on September 17, 2012    
Each invest went down by 10%:



0% for 92L & 10% for 93L
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707. sunlinepr 5:47 AM GMT on September 17, 2012    
92l keeping S of PR & DR



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708. keenu 8:21 AM GMT on September 17, 2012    
Why the GFS model for Europe is not actuall since 9/11 ?
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709. Matthias1967 8:43 AM GMT on September 17, 2012    
Quoting guygee:
That would be 2002 Hurricane Kyle with 89 advisories, including a classic from Avila that was like, "I give up!"


Worldwide Hurricane John (1994), IIRC 104 advisories issued by NHC, CPHC and JTWC.
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710. LargoFl 9:28 AM GMT on September 17, 2012    
.......................Good Morning folks.......
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711. LargoFl 9:30 AM GMT on September 17, 2012    
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
455 AM EDT MON SEP 17 2012

FLZ039-042-043-048>052-055>057-060>062-065-172100 -
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSB OROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DESOTO-CHARLOTT E-LEE-
455 AM EDT MON SEP 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS
AFTERNOON WITH LOCALLY HEAVY RAIN...WIND GUSTS TO 35 MPH...AND
FREQUENT CLOUD TO GROUND LIGHTNING. PONDING OF WATER ON ROADWAYS
IS LIKELY...ESPECIALLY IN URBAN AND FLOOD PRONE AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

...THUNDERSTORM IMPACT...
AFTERNOON THUNDERSTORMS LIKELY ACROSS WEST CENTRAL AND SOUTHWEST
FLORIDA THROUGH MUCH OF THE WEEK. NO SEVERE THUNDERSTORMS ARE
EXPECTED...BUT THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING
VERY HEAVY RAIN...WIND GUSTS TO 40 MPH...AND FREQUENT CLOUD TO
GROUND LIGHTNING.

...RIP CURRENT IMPACT...
INCREASING SOUTHWEST WINDS WILL CREATE A MODERATE RISK OF RIP
CURRENTS TUESDAY AND POSSIBLY WEDNESDAY. THOSE PLANNING BEACH
ACTIVITIES SHOULD EXERCISE CAUTION THE NEXT COUPLE OF DAYS AND
CHECK FOR POTENTIAL BEACH HAZARD STATEMENTS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

$$

OGLESBY
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712. LargoFl 9:34 AM GMT on September 17, 2012    
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713. aislinnpaps 10:08 AM GMT on September 17, 2012    
Good morning, everyone. I'll be driving to school in some good heavy rain this morning. I was hoping for some of that huge band of rain that was coming at us from Texas yesterday, but once again, it stopped at the Sabine River which divides Texas and Louisiana. So many times weather stops at that river. But that 20% that is now 10% coming up from the GOM is giving us some rain. I'm not sure why it's 10% still when it's so close to land, being already partially on land.
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714. clwstmchasr 10:26 AM GMT on September 17, 2012    
Quoting Slamguitar:
Each invest went down by 10%:



0% for 92L & 10% for 93L


Why are they still invests?
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715. Neapolitan 10:37 AM GMT on September 17, 2012    
I realize it's still too early in the game to mean much, because we've seen many of these same type systems fall apart within hours of hitting the Atlantic waters. Nevertheless, P30L is looking pretty good at the moment as it moves across West Africa:

P30L

...and it even presents well on water vapor:

P30L
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716. MAweatherboy1 10:46 AM GMT on September 17, 2012    
Nadine's starting to get a more extratropical look. It may make the transition a little sooner than the NHC indicates.

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718. GeoffreyWPB 11:11 AM GMT on September 17, 2012    
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719. Autistic2 11:13 AM GMT on September 17, 2012    
I see w115 ban was of the temp type.
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720. Autistic2 11:18 AM GMT on September 17, 2012    
Did I kill the blog?
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721. LargoFl 11:20 AM GMT on September 17, 2012    
going to be some flooding issues later today huh....
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722. Autistic2 11:20 AM GMT on September 17, 2012    
I am impressed. I single handley quited the tropics, killed the blog, all while having coffee!
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723. LargoFl 11:22 AM GMT on September 17, 2012    
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724. TropicalAnalystwx13 11:28 AM GMT on September 17, 2012    
SAB said Nadine was subtropical a few hours ago, while TAFB says it is still tropical. It doesn't look completely warm-core anymore.

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725. SFLWeatherman 11:35 AM GMT on September 17, 2012    
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726. SFLWeatherman 11:41 AM GMT on September 17, 2012    
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727. ncstorm 11:41 AM GMT on September 17, 2012    
SPC tomorrow outlook..they expanded the 30% coverage..



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728. TropicalAnalystwx13 11:56 AM GMT on September 17, 2012    
MJO will be back at the end of the month.

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729. gordydunnot 12:00 PM GMT on September 17, 2012    

92L this morning.
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730. Tazmanian 12:01 PM GMT on September 17, 2012    
92L and 93L RIP
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731. WxLogic 12:01 PM GMT on September 17, 2012    
Good Morning
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732. washingtonian115 12:17 PM GMT on September 17, 2012    
Quoting Autistic2:
I see w115 ban was of the temp type.
No I didn't get banned...They started with me first.But I'm off this subject.Good morning ncstrom and others.
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733. icmoore 12:26 PM GMT on September 17, 2012    
Good morning Wash, WxLogic, and everyone else.
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734. Xandra 12:33 PM GMT on September 17, 2012    
Today, Europe’s newest meteorology satellite, Metop-B, will blast into space from Baikonur Cosmodrome.

The MetOp satellites carry a set of seven 'heritage' instruments provided by the United States’ National Oceanic and Atmospheric Administration (NOAA) and the French Space Agency (CNES) and a new generation of five European instruments offering improved sensing capabilities to both meteorologists and climatologists.

MetOp instrument overview

Spaceflight Now's live coverage

Metop-B Live Launch
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735. washingtonian115 12:35 PM GMT on September 17, 2012    
Quoting icmoore:
Good morning Wash, WxLogic, and everyone else.
I went for a morning walk when the sun was coming up.It was really beautiful..but my phone didn't capture it well :(.
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736. icmoore 12:40 PM GMT on September 17, 2012    
Quoting washingtonian115:
I went for a morning walk when the sun was coming up.It was really beautiful..but my phone didn't capture it well :(.


Aw bummer :) but I'm glad you got to see it.
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737. JLPR2 12:43 PM GMT on September 17, 2012    
Now 92L has favorable wind shear, might be a little too late. XD

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739. GeorgiaStormz 12:46 PM GMT on September 17, 2012    
Quoting washingtonian115:
I went for a morning walk when the sun was coming up.It was really beautiful..but my phone didn't capture it well :(.


You have no idea how glad people in here are to see you back.

Reading back there was a whole page with about 20 "Free Washy" type posts....

Glad to see you didnt get permabanned or anything, and you are back
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740. washingtonian115 12:47 PM GMT on September 17, 2012    
Quoting icmoore:


Aw bummer :) but I'm glad you got to see it.
Just like the rainbow incident on Saturday.But sometimes mother nature's beauty can not be fully captured in a photo(unless I have a $500+ camra and I don't see that happening)
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741. islander101010 12:51 PM GMT on September 17, 2012    
92 should build convection as it moves through the eastern carib.
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742. LargoFl 12:51 PM GMT on September 17, 2012    
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743. stormpetrol 12:52 PM GMT on September 17, 2012    
Looks like 92L & 93L have been deactivated, no more floaters on them, but I think there is weak pulse to 92L this morning.
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744. clamshell 12:52 PM GMT on September 17, 2012    
Quoting Xyrus2000:


At best, this "study" would be considered horribly flawed given the meager description.

But posts like the one you pasted here don't really add anything to the conversation.


Your comments have proven his point exactly.

Go back and read Post 517 more carefully this time.

Both groups were advised that four correct solutions already existed. The study was not about the science in their assignment, it was about their methodology used to reach their conclusion.

The author simply compared the lengths to which each group would be willing to go to develop their conclusions. His observation was that the Ministers worked harder at reaching their conclusions and suggested that it was because they were not analyzing theological doctrine. Instead they were analyzing subject matter that was out of their field of study.

In the end, his question was quite simple. How would the scientists have gone about analyzing a theological issue. Would they have, likewise, done a more in depth analysis?

Hence my two questions, which have everything to do with how we look at the weather.

Are we as analytical as we ought to be when we look at the weather and attempt to predict what, when and where, as it relates to hurricanes?

In other words, are we too close to the subject to really see it for what it is?




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745. LargoFl 12:52 PM GMT on September 17, 2012    
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
753 AM EDT MON SEP 17 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
CENTRAL LANCASTER COUNTY IN CENTRAL SOUTH CAROLINA...
THIS INCLUDES THE CITY OF LANCASTER...

* UNTIL 1045 AM EDT

* AT 743 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A HEAVY RAINS THAT FELL THIS MORNING OVER
CENTRAL LANCASTER COUNTY.

RADAR ESTIMATES OF 6 TO 8 INCHES OF RAIN HAS FALLEN OVER
CENTRAL AND EASTERN LANCASTER COUNTY RESULTING IN NUMEROUS REPORTS
OF FLOODING. ALTHOUGH THE RAIN HAS ENDED...THE EXCESSIVE RAINFALL
WILL FLOW INTO THE LARGER CREEKS AND RIVERS AND THERE IS THE
POSSIBILITY OF ADDITIONAL FLOODING DOWNSTREAM IN THE LANCASTER AND
ELGIN COMMUNITIES. WATER RESCUES HAVE BEEN REPORTED IN THE
LANCASTER AREA AND THE PUBLIC IS URGED NOT TO DRIVE ACROSS ROADS
COVERED BY WATER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

REPORT FLOODING TO YOUR COUNTY SHERIFF...OR CALL THE NATIONAL WEATHER
SERVICE...TOLL FREE 1 877 6 3 3...6 7 7 2.
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746. LargoFl 12:54 PM GMT on September 17, 2012    

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND
CENTRAL SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED SHOWERS AND THUNDERSTORMS TODAY MAY CAUSE SOME HEAVY
RAIN WITH LOCALIZED FLOODING POSSIBLE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TUESDAY. A FEW
STORMS MAY PRODUCE STRONG WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
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747. Tropicsweatherpr 12:57 PM GMT on September 17, 2012    
12z Best Track for 92L. Still alive.

AL, 92, 2012091712, , BEST, 0, 145N, 589W, 20, 1011, LO
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748. JLPR2 12:57 PM GMT on September 17, 2012    


Sort of alive.
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749. Neapolitan 1:01 PM GMT on September 17, 2012    
93L is also alive--and strengthening:

AL, 93, 2012091700, , BEST, 0, 265N, 955W, 20, 1013, LO, 0, , 0, 0, 0, 0,
AL, 93, 2012091706, , BEST, 0, 273N, 948W, 25, 1010, LO, 0, , 0, 0, 0, 0,
AL, 93, 2012091712, , BEST, 0, 285N, 935W, 30, 1006, LO, 34, NEQ, 0, 0, 0, 0, 1011, 180, 70, 0, 0, L, 0, , 0, 0, INVEST, M,
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750. washingtonian115 1:01 PM GMT on September 17, 2012    
Quoting JLPR2:


Sort of alive.
Now it's trying to build a anti cyclone.Seems it wants to act up.The eastern caribbean should finish it off though.NHC may keep a watchful eye to see if it may act up in the W.C.
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751. islander101010 1:02 PM GMT on September 17, 2012    
usually im on tazs bus but 92 the character might of been alittle early to pull the rug out
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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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