Boards.ie uses cookies. By continuing to browse this site you are agreeing to our use of cookies. Click here to find out more x
Post Reply  
 
 
Thread Tools Search this Thread
10-10-2018, 22:16   #151
Fitzo123
Registered User
 
Fitzo123's Avatar
 
Join Date: Sep 2017
Posts: 40
It's going to cross back into the Atlantic remaining as a hurricane at this rate; incredible stuff. Very lucky to this point that it's missed populated areas on the coast.
Fitzo123 is offline  
Thanks from:
Advertisement
10-10-2018, 22:20   #152
MJohnston
Registered User
 
MJohnston's Avatar
 
Join Date: Sep 2008
Posts: 7,664
Quote:
Originally Posted by J6P View Post
Another good video of the stadium effect inside the eye wall..

https://www.facebook.com/Stefan1126/...6491591296138/
The one time someone has perfect conditions to record that and then they record it portrait and upload it in 360p :cries:
MJohnston is offline  
(5) thanks from:
10-10-2018, 22:26   #153
17-pdr
Registered User
 
Join Date: Feb 2016
Posts: 3,691
Quote:
Originally Posted by MJohnston View Post
The one time someone has perfect conditions to record that and then they record it portrait and upload it in 360p :cries:
Yep, was thinking that too! Its incredibly rare to get good quality genuine stadium effect video on the ground at ground zero inside a storm. Normally the reserve of the hurricane hunter aircraft.

Last edited by 17-pdr; 10-10-2018 at 23:09.
17-pdr is offline  
11-10-2018, 00:22   #154
Rhineshark
Registered User
 
Rhineshark's Avatar
 
Join Date: Jun 2018
Posts: 627
Quote:
Originally Posted by Fitzo123 View Post
It's going to cross back into the Atlantic remaining as a hurricane at this rate; incredible stuff. Very lucky to this point that it's missed populated areas on the coast.
Unfortunately, it didn't. The destruction in and around Panama City looks devastating.
Rhineshark is offline  
11-10-2018, 01:05   #155
MJohnston
Registered User
 
MJohnston's Avatar
 
Join Date: Sep 2008
Posts: 7,664
Remarkable video of it just demolishing buildings here:

https://twitter.com/blkahn/status/1050094351790034944
MJohnston is offline  
Advertisement
11-10-2018, 01:08   #156
MJohnston
Registered User
 
MJohnston's Avatar
 
Join Date: Sep 2008
Posts: 7,664
https://twitter.com/Wx_Tyler/status/1050120756862930944
MJohnston is offline  
(2) thanks from:
11-10-2018, 01:45   #157
BumperD
Registered User
 
BumperD's Avatar
 
Join Date: Nov 2013
Posts: 4,678
Some horrendous damage being shown on weather channel right now from Panama City, looks like a few embedded tornadoes ripped through there
BumperD is offline  
11-10-2018, 02:25   #158
Cantona's Collars
Registered User
 
Cantona's Collars's Avatar
 
Join Date: Jun 2010
Posts: 30,256
The gauges at one of the air force bases recorded winds of 130mph before they broke.
Cantona's Collars is offline  
(3) thanks from:
11-10-2018, 11:42   #159
John.Icy
Registered User
 
Join Date: Dec 2010
Posts: 1,404
How come Hurricanes are never portrayed as such on the bog standard GFS runs? Looking at the N.America view and Michael is measly when compared to big atlantic storms.

Is it a resolution/pressure thing or something else?
John.Icy is offline  
Advertisement
11-10-2018, 21:22   #160
17-pdr
Registered User
 
Join Date: Feb 2016
Posts: 3,691
Quote:
Originally Posted by John.Icy View Post
How come Hurricanes are never portrayed as such on the bog standard GFS runs? Looking at the N.America view and Michael is measly when compared to big atlantic storms.

Is it a resolution/pressure thing or something else?
Size basically. The most destructive wind-field of a hurricane along with the associated pressure changes represented by tightly packed isobars might be only 20 or 30 miles across (the eye wall) while a similar wind-field of a mid-latitude depression may extend for a couple of hundred miles or more. This is why on a continental sized model chart you see them as tiny features. Here is tomorrow's ECM. Callum to the NW of Ireland with Leslie down at the bottom. Leslie looks insignificant on that chart, but the NHC is predicting winds of 85 mph for it.

17-pdr is offline  
11-10-2018, 23:57   #161
Gaoth Laidir
Registered User
 
Gaoth Laidir's Avatar
 
Join Date: Dec 2015
Posts: 3,415
Quote:
Originally Posted by 17-pdr View Post
Size basically. The most destructive wind-field of a hurricane along with the associated pressure changes represented by tightly packed isobars might be only 20 or 30 miles across (the eye wall) while a similar wind-field of a mid-latitude depression may extend for a couple of hundred miles or more. This is why on a continental sized model chart you see them as tiny features. Here is tomorrow's ECM. Callum to the NW of Ireland with Leslie down at the bottom. Leslie looks insignificant on that chart, but the NHC is predicting winds of 85 mph for it.

It's got a lot to do with the projection of the map. The further polewars from the equator you go the larger more distorted area becomes. Draw a horizontal line 1110 km (10 degrees) long on both the 10 ° and 70 ° lines of latitude and you'll find that the 70 ° line appears much longer on the map. If a hurricane is 10 degrees wide it will therefore appear much smaller than one of our storms 10 degrees wide.
Gaoth Laidir is offline  
(4) thanks from:
12-10-2018, 01:41   #162
17-pdr
Registered User
 
Join Date: Feb 2016
Posts: 3,691
Quote:
Originally Posted by Gaoth Laidir View Post
It's got a lot to do with the projection of the map. The further polewars from the equator you go the larger more distorted area becomes. Draw a horizontal line 1110 km (10 degrees) long on both the 10 ° and 70 ° lines of latitude and you'll find that the 70 ° line appears much longer on the map. If a hurricane is 10 degrees wide it will therefore appear much smaller than one of our storms 10 degrees wide.
Allowing for the distortions of a Mercator projection, many tropical cyclones would still appear somewhat smaller than our mid latitude systems. Systems like Tracey and Marco (2008) would be pretty small if represented on a Mercator based chart at our latitudes. Then again Tip would be pretty big......
17-pdr is offline  
12-10-2018, 18:06   #163
M.T. Cranium
Registered User
 
Join Date: Apr 2007
Posts: 9,722
The GFS currently has Leslie making a landfall in southern Portugal on Saturday night into Sunday morning (at tropical storm intensity, possibly extra-tropical, at that point), about 50 miles south of Lisbon. The model has been wavering between that kind of track and a loop back to the west for yet another tour of the North Atlantic but it seems that the rapid progress of Michael is locking in the ridge between the two systems and pushing Leslie on to the east. The same model run (12z) takes Michael rather harmlessly south of Ireland on Sunday night and into the Biscay region where it is supposed to disintegrate with remnants reaching the north coast of Spain. Meanwhile what is left of Leslie would cross southern Spain and die out in the western Med.

A frontal system expected in Ireland by late Monday is from a separate weather system that moved into the Atlantic from northeast Canada and Greenland.
M.T. Cranium is offline  
12-10-2018, 20:35   #164
star gazer
Moderator
 
star gazer's Avatar
 
Join Date: Sep 2003
Posts: 1,546
Mexico Beach, Florida was badly impacted with some terrible consequences for the area as well as Panama City. Evacuations were obviously extremely important and though there was a shorter lead in time with an intensity increase coming towards landfall, there was time for people to take advice. The death toll is 12 so far with searches continuing in the harder to reach parts.
rte
independent.ie

https://twitter.com/CNNweather/statu...98864874893312
https://twitter.com/NOAA/status/1050740411646570496
https://twitter.com/weatherchannel/s...25921538347008
star gazer is offline  
(3) thanks from:
12-10-2018, 22:19   #165
RobertKK
Registered User
 
Join Date: Mar 2013
Posts: 29,358
Hurricanes can be upgraded in category based on the destruction they do. If the destruction is at Cat 5 level then Michael could get upgraded as having been a cat 5 at landfall.
Hurricane Andrew was upgraded to a category 5 hurricane 10 years after it had hit Florida.
RobertKK is offline  
(2) thanks from:
Post Reply

Quick Reply
Message:
Remove Text Formatting
Bold
Italic
Underline

Insert Image
Wrap [QUOTE] tags around selected text
 
Decrease Size
Increase Size
Please sign up or log in to join the discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search



Share Tweet