Dr. Jeff Masters' WunderBlog

Typhoon Mirinae less destructive than feared for Philippines
Posted by: Dr. Jeff Masters, 14:15 GMT le 31 octobre 2009 +1
Typhoon Mirinae blew through the Philippines' Luzon Island yesterday as a borderline Category 1 to 2 typhoon with top winds of 95 - 100 mph. Due to the rapid forward motion of the typhoon and a sharp decrease in the storm's organization just prior to landfall, rainfall amounts from the typhoon were less than six inches over Luzon. The eye of Mirinae passed over the capital of Manila, where winds peaked at minimal tropical storm force, 39 mph, with gusts to 56 mph, at 6 am local time Saturday. Nearby weather stations recorded sustained winds as high as 44 mph, and rainfall amounts of 2 - 3 inches. Though Mirinae is being blamed for at least 11 deaths, with 7 people still missing, it's fair to say that the typhoon largely spared the Philippines. The Manila Bulletin is reporting that a tornado (called an "ipo-ipo" there) injured ten and destroyed some 60 houses in Cavite and Ternate as Mirinae swept through.

Mirinae, now just a tropical storm with 65 mph winds, is currently over the South China Sea. Mirinae is expected to make landfall in south-central Vietnam near 00 UTC on Monday, November 2. As Mirinae approaches Vietnam, wind shear will increase, sea surface temperatures and the total heat content of the ocean will sharply decrease, and the storm will encounter cooler, more stable air. These negative influences should make Mirinae a 45 - 55 mph tropical storm at landfall in Vietnam.


Figure 1. Filipinos watch the onslaught of Typhoon Mirinae on Saturday. Image credit: Jim Edds. His extremestorms.com website has images and videos from the landfall of Mirinae.

Quiet in the Atlantic
A non-tropical low pressure system in the middle Atlantic Ocean, near 30N 50W, 700 miles east of Bermuda, has cut off from the jet stream. This low will slowly wander westward toward Bermuda over the next three days. It is possible that the low will spend enough time over water to acquire some tropical characteristics and become Subtropical Storm Ida, though I put the chances at low, less than 30%. SSTs are 25 - 26° C in the region, which is barely warm enough to support a tropical storm. Wind shear is high, 30 - 50 knots, and there is a large amount of dry air to the west of the low, so no development will occur today. The storm is expected to recurve to the north well east of Bermuda on Tuesday.

None of the reliable computer models is calling for tropical storm development in the Atlantic over the next seven days. The GFS and NOGAPS models are calling for a tropical storm to form off the Pacific coast of Mexico near the Guatemala border by the middle of next week, and it is possible that this development could occur on the Atlantic side of Central America instead, as suggested by the Canadian model.

Jeff Masters
Categories: Hurricane
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601. Drakoen 02:33 GMT le 02 novembre 2009    
Member Since: 28 octobre 2006 Posts: 57 Comments: 29010
602. reedzone 02:36 GMT le 02 novembre 2009    
It appears that Subtropical Ida will be designated by 4 a.m. tomorrow morning if it keeps up the organization. If they were to designate it by 10 p.m., the Navy site would have already renumbered it 09L IDA, so no Ida tonight. Tomorrow morning? Most likely.
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603. winter123 02:36 GMT le 02 novembre 2009    
repost, and bookmarking, thanks to whoever found these :)

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604. Cavin Rawlins 02:39 GMT le 02 novembre 2009    
Quoting reedzone:
It appears that Subtropical Ida will be designated by 4 a.m. tomorrow morning if it keeps up the organization. If they were to designate it by 10 p.m., the Navy site would have already renumbered it 09L IDA, so no Ida tonight. Tomorrow morning? Most likely.


Correction

11L Ida
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605. xcool 02:39 GMT le 02 novembre 2009    


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606. Cavin Rawlins 02:41 GMT le 02 novembre 2009    
Very define and tight COC

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607. Orcasystems 02:41 GMT le 02 novembre 2009    


Seismic Monitor

AOI

AOI

Humor in Comments

TS BUSTED FORECAST, to be used in the event you make a minor discrepancy in your forecast.
Member Since: 1 octobre 2007 Posts: 77 Comments: 26077
608. BenBIogger 02:45 GMT le 02 novembre 2009    
Member Since: 19 Mars 2009 Posts: 0 Comments: 1419
609. TampaSpin 02:48 GMT le 02 novembre 2009    
Extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are a group of cyclones defined as synoptic scale low pressure weather systems that occur in the middle latitudes of the Earth (outside the tropics) having neither tropical nor polar characteristics, and are connected with fronts and horizontal gradients in temperature and dew point otherwise known as "baroclinic zones".[1] Extratropical cyclones are the everyday phenomena which, along with anticyclones, drive the weather over much of the Earth, producing anything from cloudiness and mild showers to heavy gales and thunderstorms.


Subtropical cyclone
A subtropical cyclone is a weather system that has some characteristics of a tropical and an extratropical cyclone. As early as the 1950s, meteorologists were unclear whether they should be characterized as tropical or extratropical cyclones. They were officially recognized by the National Hurricane Center in 1972. Subtropical cyclones began to receive names off the official tropical cyclone lists in the Atlantic Basin and the southwest Indian ocean.
There are two definitions currently used for subtropical cyclones. Across the north Atlantic and southwest Indian ocean, they require central convection fairly near the center and a warming core in the mid-levels of the troposphere. Across the eastern half of the northern Pacific, they require a mid-tropospheric cyclone to cut off from the main belt of the westerlies and only a weak surface circulation. Subtropical cyclones have broad wind patterns with maximum sustained winds located farther from the center than typical tropical cyclones, and have no weather fronts linked into their center.

Since they form from initially extratropical cyclones which have colder temperatures aloft than normally found in the tropics, the sea surface temperatures required for their formation are lower than the tropical cyclone threshold by 3°C (5°F), lying around 23 °C (73 °F). This also means that subtropical cyclones are more likely to form outside the traditional bounds of the hurricane season.
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610. xcool 02:49 GMT le 02 novembre 2009    
Join me tonight November 1st for the next edition of the weather and the media show. My guest will be Joe Bastardi from accuweather as we discuss the quiet hurricane season and why this is happening. The program will start at 8:00PM ET November 1st right here on


http://hurricanecity.com/
Member Since: 26 septembre 2009 Posts: 2 Comments: 15501
611. winter123 02:50 GMT le 02 novembre 2009    
Miranae... wait for it...

wait for it..........

I THINK I SEE A EYE!

Member Since: 29 juillet 2006 Posts: 28 Comments: 1700
612. winter123 02:51 GMT le 02 novembre 2009    
Quoting xcool:
Join me tonight November 1st for the next edition of the weather and the media show. My guest will be Joe Bastardi from accuweather as we discuss the quiet hurricane season and why this is happening. The program will start at 8:00PM ET November 1st right here on


http://hurricanecity.com/


What!! It's 10ET now.
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613. reedzone 02:55 GMT le 02 novembre 2009    
Thanks Weather456,I forgot about the 2 depressions, 11L IDA
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614. xcool 02:56 GMT le 02 novembre 2009    
winter123 too later now opps
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615. winter123 03:04 GMT le 02 novembre 2009    
come on... this thing looks a lot better than Laura last year, I still cannot believe that thing was named. Very sparse convection, almost a naked swirl most of the time, barely warm core...

Loop
Member Since: 29 juillet 2006 Posts: 28 Comments: 1700
616. melwerle 03:17 GMT le 02 novembre 2009    
Went to a halloween party last night and one of the kids was really sick. Dx'd with h1n1 today. Having a complete panic at this point b/c my kid has juvenile diabetes and we haven't been able to get a vaccine. Soooooo happy we went to that party. I feel like it's a bit out of the book "World Without End"...you hear someone cough, sneeze whatever and you're like "ughhhhhh".
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617. TampaSpin 03:25 GMT le 02 novembre 2009    
Phase Diagram 1: Lower Troposphere Thermal Wind Vs Lower Troposphere Frontal Nature



Phase Diagram 2: Lower Troposphere Thermal Wind Vs Upper Troposphere Thermal Wind
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618. tramp96 03:29 GMT le 02 novembre 2009    
What happened to StormW
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619. AussieStorm 03:32 GMT le 02 novembre 2009    
Quoting winter123:
come on... this thing looks a lot better than Laura last year, I still cannot believe that thing was named. Very sparse convection, almost a naked swirl most of the time, barely warm core...

Loop




Member Since: 30 septembre 2007 Posts: 5 Comments: 13329
620. albert0826 03:38 GMT le 02 novembre 2009    
i want a cold front
621. beell 03:38 GMT le 02 novembre 2009    
There ya go P451-if you're still here.
Wrapping in some dry air right to the heart

Looking kinda frontal again?
Not gonna make it...

SSD WV Loop
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622. AwakeInMaryland 03:38 GMT le 02 novembre 2009    
Melwerle, u have WU mail.

Secretary of HHS said lots more H1N1 vaccine coming this week; stand by to stand by :-)

Anyone around in '57 and before has already been exposed to same strain of flu, so not so much worry about this group.
Member Since: 19 août 2008 Posts: 32 Comments: 1918
623. AussieStorm 03:51 GMT le 02 novembre 2009    
Invest 96W
FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
155 NM EITHER SIDE OF A LINE FROM 17.3N 127.2E TO 19.0N 122.0E
WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 20 TO 25 KNOTS. METSAT IM-
AGERY AT 012030Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 17.8N 126.3E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 16
KNOTS
Member Since: 30 septembre 2007 Posts: 5 Comments: 13329
624. Tazmanian 03:56 GMT le 02 novembre 2009    
Quoting AussieStorm:
Invest 96W
FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
155 NM EITHER SIDE OF A LINE FROM 17.3N 127.2E TO 19.0N 122.0E
WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 20 TO 25 KNOTS. METSAT IM-
AGERY AT 012030Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 17.8N 126.3E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 16
KNOTS



thats 97W
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625. winter123 04:11 GMT le 02 novembre 2009    
cloudtops lowering... is it d-min? It won't be named if this continues. Finally has a bit of convection on the west side of it however. But a very small bit.
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626. Orcasystems 04:23 GMT le 02 novembre 2009    
Blog Update

Games are getting Interesting tonight now :)
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627. tornadodude 04:27 GMT le 02 novembre 2009    
good evening guys
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628. reedzone 04:28 GMT le 02 novembre 2009    
I really don't know why you all are saying it won't be named now, it's a Hybrid Low, possibly a Subtropical Storm. The evidence is there as Weather456 pointed out, it's looking better tonight, it even has an eye like feature. We'll see what the NHC does tomorrow morning, I think it deserves a name if it continues to organize by morning.
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629. xcool 04:30 GMT le 02 novembre 2009    
:0
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630. winter123 04:33 GMT le 02 novembre 2009    
...was there a new surface map at 11? Can someone post it? Just curious if they still think this is frontal (it definitely isnt by now.
Member Since: 29 juillet 2006 Posts: 28 Comments: 1700
631. KEEPEROFTHEGATE (Mod) 04:39 GMT le 02 novembre 2009    
Quoting winter123:
...was there a new surface map at 11? Can someone post it? Just curious if they still think this is frontal (it definitely isnt by now.


HERE YA GO

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632. tornadodude 04:40 GMT le 02 novembre 2009    
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633. KEEPEROFTHEGATE (Mod) 04:44 GMT le 02 novembre 2009    
a little warm up from us TD we are cool all week with some wet flurries poss by end of week
Member Since: 15 juillet 2006 Posts: 143 Comments: 40528
634. tornadodude 04:46 GMT le 02 novembre 2009    
Quoting KEEPEROFTHEGATE:
a little warm up for us TD


Yeah, not much tho, it got down to 30 last night :P
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635. Orcasystems 04:46 GMT le 02 novembre 2009    
Quoting KEEPEROFTHEGATE:
a little warm up for us TD


I keep checking... waiting for the Centre of the Universe to start snowing and freeze over :)
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636. KEEPEROFTHEGATE (Mod) 04:47 GMT le 02 novembre 2009    
46.2 here now
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637. tornadodude 04:48 GMT le 02 novembre 2009    
Quoting KEEPEROFTHEGATE:
46.2 here now


I have 47.5
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638. winter123 04:49 GMT le 02 novembre 2009    
Quoting KEEPEROFTHEGATE:


HERE YA GO


lol, "STORM"... looks like they're still calling it frontal. Not that I do think it deserves a name based in its presentation at the moment, but they really are finding any excuse to never name this. Too much paperwork?
Member Since: 29 juillet 2006 Posts: 28 Comments: 1700
639. KEEPEROFTHEGATE (Mod) 04:49 GMT le 02 novembre 2009    
Quoting Orcasystems:


I keep checking... waiting for the Centre of the Universe to start snowing and freeze over :)
as soon as it does i will let ya know
Member Since: 15 juillet 2006 Posts: 143 Comments: 40528
640. tornadodude 04:51 GMT le 02 novembre 2009    
Quoting winter123:

Too much paperwork?


It's the government, is there such thing as too much paperwork for them? :P
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641. tornadodude 04:58 GMT le 02 novembre 2009    
guess my attempt at humor without any weather related content killed the blog
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642. xcool 05:07 GMT le 02 novembre 2009    
lol noo matt
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643. tornadodude 05:11 GMT le 02 novembre 2009    
Quoting xcool:
lol noo matt


lol well, how is your weather?

I have decided to keep the majority of my posts weather related(I'm sure people are glad to hear this) since people were really giving me a hard time about it the other day. I just always tried to keep the blog in good spirits by trying to insert some humor here and there, but some of the bloggers did not like it, and I will respect them, that way I can attempt to avoid further bashing.
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644. MethaneMike 05:11 GMT le 02 novembre 2009    
I have a new blog entry. It's long. Just click my name for some pure methane gas.
645. xcool 05:13 GMT le 02 novembre 2009    
tornadodude cold outside :(
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646. tornadodude 05:17 GMT le 02 novembre 2009    
Quoting xcool:
tornadodude cold outside :(


yeah same here, I like the cold temperatures tho, and I am definitely anticipating some good snows this year (:
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647. xcool 05:26 GMT le 02 novembre 2009    
not me i hate cold weather too cold for me i guess i"m get old .
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648. tornadodude 05:34 GMT le 02 novembre 2009    
Quoting xcool:
not me i hate cold weather too cold for me i guess i"m get old .


maybe, I guess some like it, others hate it.
Member Since: 28 juin 2006 Posts: 22 Comments: 7816
649. tornadodude 05:35 GMT le 02 novembre 2009    
ok, well I am going to bed, so goodnight all
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650. xcool 05:43 GMT le 02 novembre 2009    
bye
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651. winter123 06:08 GMT le 02 novembre 2009    
has an eye now... but such low clouds theres no way it would ever be named. Unless this is the diurnal min causing this, I'm going to pronounce this storm dead... was probably part warm core for a few hours but it's not worthy of a name unless it magically bombs soon.


(guess i'm the only one staying up till the 4am advisory... lol... have too, roommate plays music till at least then)
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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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