Dr. Jeff Masters' WunderBlog

Super typhoon Durian aims for the Philippines; rare tornado hits Wales
Posted by: Dr. Jeff Masters, 14:48 GMT le 29 novembre 2006 +3
Super Typhoon Durian put on a very impressive burst of rapid intensification today, and is now a large and very dangerous Category 4 storm headed towards the Philippines. Durian (named for a tropical fruit) is on track to make landfall on the main island of Luzon later today and pass over the island Thursday. Winds at Catanduanes and Daet, the first major cities that will be hit, had increased to 20 mph at 1am local time Thursday, and will steadily pick up. Durian is in an environment of weak vertical wind shear, warm ocean waters, and favorable upper-level outflow. In the past 24 hours, the storm has intensified from a Category 1 typhoon with winds of 85 mph to a Category 4 super typhoon with 155 mph winds and a central pressure of 916 mb. Durian has a good chance of intensifying into a Category 5 super typhoon later today, before interaction with land and passage over Luzon start to weaken the storm. Unfortunately, Durian is expected to slow down as it passes over the Philippines, and may pass near the heavily populated capital city of Manila, a city of 12 million. The slow motion will make Durian a prodigious rainmaker, and NOAA's Satellite Analysis Branch is predicting rain amounts of up to eight inches in 24 hours (Figure 2). Heavy rains that trigger flash floods and mudslides are the primary hazards of typhoons in the Philippines, and we can expect damage and loss of life similar to what devastating Typhoon Xangsane did to the islands on September 27. Xangsane, a Category 4 typhoon that passed over Manilla, killed 218, did over $100 million in damage, and left tens of thousands homeless. The Philippines have raised its highest alert level, and are moving coastal residents out where a storm surge of up to 15 feet is expected. Schools have been cancelled today and all sea travel suspended.


Figure 1. Latest satellite image of Durian from NOAA.

The Philippines have been hit particularly hard this typhoon season, and Durian will be the 4th major typhoon to wallop the island in the past three months. Typhoon Chebi hit Luzon as a Category 3 typhoon on November 11, but hit the less populated northern portion of the island and moved quickly enough that heavy rains and flooding caused relatively little damage. Super Typhoon Cimaron made landfall October 29 as a Category 5 storm with maximum sustained winds of 160-180 mph. Cimaron killed at least 27, destroyed 2600 homes, and damaged another 18,000.


Figure 2. Latest precipitation forecast for a 24-hour period from NOAA's Satellite Analysis Branch.

Tornado hits Wales
A rare tornado hit Wales in the British Islands yesterday, according to news reports from the BBC. The small tornado, which hit at 1:30 am local time, damaged 20 homes. Tornadoes are rare in the British Islands due to the lack of cold, dry continental air needed to generate severe thunderstorms. Here's the weather discussion put out by the UK Met office before the tornado:


CONVECTIVE DISCUSSION issued at 1045 GMT on Tuesday 28th November 2006 Valid from/until: 1045 - 2359 GMT on Tuesday 28th November for the following regions of the United Kingdom & Eire:

Coastal areas of Wales SW England Southern coastal counties of England Channel Islands

SYNOPSIS: Large upper trough/cold pool is approaching from the west. Cold advection aloft/synoptic lift will cause instability to increase with CAPE values of 2-300 J/Kg expected, with LIs down to -2C or so. Flow is rather unidirectional, and low-level/deep layer shear are not large. However, just ahead of the trough, some increase is 850 hPa winds are forecast by some mesoscale models, especially across northern parts of Wales early-mid afternoon.

THREATS: Heavy showers/a few thunderstorms are expected to affect the areas this afternoon and evening, with the risk shifting east over time. The main effects of these will be hail 15-20mm diameter, gusty winds, briefly torrential rain and a few cloud-ground lightning strikes. However, there is a small risk of tornadic development, especially across northern parts of Wales early-mid afternoon, as 850 hPa wind max moves through. Elsewhere, the risk is lower, but still there. Overall though, the risk is deemed too low for a WATCH to be issued.


Jeff Masters
TORRNOADO ALERT IN BRITAIN (richie123098)
over the past week Britain had been hit with servre Storms and flooding and very high windsi got some pictures of a tornado in a west Wales village which struck last niteTornado warnings are in affect in South Wales, West Wales and south west England today
TORRNOADO ALERT IN BRITAIN
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151. hurricane23 19:14 GMT le 29 novembre 2006    
Seems like the GFDL model was correct on intensity...
Member Since: 14 mai 2006 Posts: 8 Comments: 13276
154. hurricane23 19:20 GMT le 29 novembre 2006    
saddlegait the strongest winds are usually around the eye were the most destructive winds are located.
Member Since: 14 mai 2006 Posts: 8 Comments: 13276
155. ricderr 19:21 GMT le 29 novembre 2006    
now h23......the big wrap up post..use your best steve lyons
Member Since: 27 juin 2006 Posts: 626 Comments: 18069
160. sandcrab39565 19:29 GMT le 29 novembre 2006    
H23 take the FEMA course IS-324 it is a good course
Member Since: 25 juin 2006 Posts: 36 Comments: 9971
162. hurricane23 19:30 GMT le 29 novembre 2006    
saddlegait The most intense part of a tropical cyclone is in a core meaning the eyewall.Rainbands extending from the cyclone can usually begin to affect an area way before the most intense part of the cyclone comes ashore.In any of those rainbands you can experience very strong winds gusts and very heavy rain.
Member Since: 14 mai 2006 Posts: 8 Comments: 13276
164. sandcrab39565 19:34 GMT le 29 novembre 2006    
Saddle, If faceing 140 mph winds in the future gust over 35 would tell me to get the --- out.lol
Member Since: 25 juin 2006 Posts: 36 Comments: 9971
166. sandcrab39565 19:38 GMT le 29 novembre 2006    
Yes it does but even the most educated dont listen either.lol The true answer is location elevation and type of structure.
Member Since: 25 juin 2006 Posts: 36 Comments: 9971
168. hurricane23 19:40 GMT le 29 novembre 2006    
saddlegait durian is a cyclone similar to andrew were the strongest winds are in a very small core.Andrew's winds were very intense but were only confined to a small area.
Member Since: 14 mai 2006 Posts: 8 Comments: 13276
170. sandcrab39565 19:45 GMT le 29 novembre 2006    
Have fun everyone off to a meeting be back later.
Member Since: 25 juin 2006 Posts: 36 Comments: 9971
173. Tazmanian 19:52 GMT le 29 novembre 2006    
winds now 130kt 910mb it olny drop 5 mph
Member Since: 21 mai 2006 Posts: 5088 Comments: 111359
174. Tazmanian 19:52 GMT le 29 novembre 2006    
lol
Member Since: 21 mai 2006 Posts: 5088 Comments: 111359
175. SteveDa1 19:54 GMT le 29 novembre 2006    
Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
176. SteveDa1 19:59 GMT le 29 novembre 2006    
That was the image of the day, its a nice picture. I think Durian will make landfall on that small island sticking out. I cant see an eye and i dont think it will have time to intensify after the eye is completed (if it does).

Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
178. SteveDa1 20:04 GMT le 29 novembre 2006    
Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
183. SteveDa1 20:23 GMT le 29 novembre 2006    
"Thursday, the clash of air masses across the South will be just as potent as anything that happens during the spring. Warm, humid air from the Gulf of Mexico will bubble and churn and turn into towering thunderstorm clouds. The storms will unleash torrents of rain and damaging straight line winds. Given the very volatile and potent nature of the situation, the population in the threat zone must be alert for possible tornadoes."

Eastern Texas, Louisiana, Mississippi, Alabama and Tennessee and Western Georgia are in that zone.
Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
185. SteveDa1 20:26 GMT le 29 novembre 2006    
This is not a gentle storm! Anything from Heavy snow to Ice to Severe T-storms.
Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
186. Chicklit 20:30 GMT le 29 novembre 2006    
Hi Guys. I haven't been here for a while...I see you have things to talk about. But would someone please explain to me what's going to happen in NYC on Friday? I will be there selling my book (on foot).
jj
Member Since: 11 juillet 2006 Posts: 14 Comments: 10254
187. SteveDa1 20:31 GMT le 29 novembre 2006    
Tornado Watches:
Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
188. SteveDa1 20:35 GMT le 29 novembre 2006    
Chicklit

New York City:
Mostly cloudy and windy with the temperature breaking the record of 69; a couple of p.m. t-storms. Winds from the S at 15 mph.
High: 70 °F
Member Since: 17 octobre 2006 Posts: 59 Comments: 1057
189. Chicklit 20:37 GMT le 29 novembre 2006    
They're talking about 40-55 mph winds! Any idea why?
Member Since: 11 juillet 2006 Posts: 14 Comments: 10254
190. newt3d 20:38 GMT le 29 novembre 2006    
Looks like we'll have some rough storms tomorrow in Huntsville, AL. The weather guys on the news have been hinting at this one all week.
Member Since: 6 octobre 2005 Posts: 0 Comments: 85
192. Drakoen 20:40 GMT le 29 novembre 2006    
just for the heck of it.. i noticed this on the NHC discussion

TROPICAL WAVES...
AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 17N39W 12N41W 5N42W
MOVING WEST 10 TO 15 KT. WE STUDIED THE RAWINSONDE DATA FROM
THE CAPE VERDE ISLANDS AND THE WIND SHIFT FROM 700 MB TO
600 MB FROM A FEW DAYS AGO SEEMS TO INDICATE THAT THE WAVE
PASSED THROUGH THERE. CYCLONIC TURNING IS APPARENT IN THE LOW
CLOUD FIELD ON VISIBLE SATELLITE IMAGERY. SCATTERED MODERATE
SHOWERS TO ISOLATED STRONG THUNDERSTORMS ARE FROM 11N TO 12N
BETWEEN 39W AND 41W. WIDELY SCATTERED MODERATE SHOWERS TO
ISOLATED STRONG THUNDERSTORMS ARE ELSEWHERE FROM 7N TO 13N
BETWEEN 38W AND 43W. OTHER SHOWERS ARE POSSIBLE FROM 13N
TO 17N BETWEEN 39W AND 44W.
Member Since: 28 octobre 2006 Posts: 57 Comments: 29010
193. Drakoen 20:44 GMT le 29 novembre 2006    
chicklit:

Friday
Rain showers likely in the morning...then rain showers likely and chance of thunderstorms in the afternoon. Breezy. Some thunderstorms may produce gusty winds in the afternoon. Highs in the lower 60s. Southwest winds 15 to 25 mph. Gusts up to 40 mph in the afternoon. Chance of showers and thunderstorms 70 percent.
Member Since: 28 octobre 2006 Posts: 57 Comments: 29010
195. Dodabear 21:16 GMT le 29 novembre 2006    
Saddlegait,

Compared to this I think your outlook is not all that bad.

Statement as of 12:35 PM CST on November 29, 2006

A Winter Storm Warning remains in effect from 6 PM this evening
to 3 am CST Friday for the following counties...

In Arkansas...
Benton.

In Oklahoma...
Craig... Ottawa... Tulsa... Rogers... Mayes... Delaware... creek...
Okfuskee... Okmulgee... Wagoner... Cherokee... Adair... Muskogee...
McIntosh... and Pittsburg.

A powerful cold front was spreading across the warning area
today with temperature falling rapidly as the wind shifts
to the north. Rain and thunderstorms were developing and
expanding along and behind the front. This evening temperatures
will begin to fall below freezing while the rain and
thunderstorms continue. This will result in periods of freezing
rain or sleet tonight. Thunderstorms may persist while the
surface temperature GOES below freezing and this could cause
damaging ice accumulations in parts of the area tonight.

Initially the ice glaze will affect only elevated objects... but
as the temperature falls below 29 degrees the ground and Road
surfaces will also see ice accumulations.

On Thursday... snow will develop and be heavy at times. Accumulations
of 4 to 6 inches are likely along and north of a line from
Henryetta Oklahoma to Springdale Arkansas with a zone of 6 to 8 inches
of snow possible along the I-44 corridor... including Tulsa... with
local amounts to 10 inches in extreme northeast Oklahoma.

Travel could become nearly impossible on Thursday in parts of
northeast Oklahoma as winds increase and casue some blowing and
drifting of the snow.

Preprarations for this now dangerous storm should be rushed
to completion. This includes ensuring an adequate supply of
vital items like medications and baby supplies and being ready
for possible power interuptions.
Member Since: 28 juillet 2001 Posts: 0 Comments: 2234
198. 1900hurricane 21:28 GMT le 29 novembre 2006    
I leave Durian for 9 hours to go to school, and he totally bombs out on me! Someone needs to watch these typhoons for me while I'm at school. They never do anything interesting while I watch them; they always bomb out either when I'm sleeping or at school, and by the time I come back to watch them, they start weakining!
Member Since: 2 août 2006 Posts: 43 Comments: 10366
200. ryang 21:32 GMT le 29 novembre 2006    
Hi 1900.
Member Since: 25 août 2006 Posts: 329 Comments: 12333

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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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