Sean, rare Mediterranean hybrid, and AK superstorm forms; quakes and tornadoes in OK

By: Dr. Jeff Masters , 3:52 PM GMT on November 08, 2011

Share this Blog
23
+

Subtropical Storm Sean formed this morning between Bermuda and the Bahamas. Sean's formation brings this year's tally of named storms to eighteen, tying 2011 with 1969 as the 6th busiest Atlantic hurricane season since record keeping began in 1851. Only 2005, 1933, 1995, 1887, and 2010 have had more named storms. However, 2011 has had an unusually low percentage of its named storms reach hurricane strength. We've had an average number of hurricanes--six--meaning that only 33% of this year's named storms have made it to hurricane strength. Normally, 55 - 60% of all named storms intensify to hurricane strength in the Atlantic. There have been three major hurricanes in 2011, which is one above average, and the total Accumulated Cyclone Energy (ACE)--a measure of the destructive potential of this season's storms--has been about 20% above average. The rare combination of near-record ocean temperatures but unusually dry, stable air over the Atlantic is no doubt at least partially responsible for the unusually high count of named storms, but near-average number of hurricanes and ACE.


Figure 1. The subtropical disturbance that became Subtropical Storm Sean, as seen at 1 pm EST November 7, 2011. Image credit: NASA.

Infrared satellite loops reveal that Sean has developed a respectable amount of heavy thunderstorm activity near its center that is increasing in intensity and areal coverage. While the low-level circulation center is exposed to view, a band of thunderstorms is trying to wrap around and close of the center. If this occurs, more substantial strengthening can occur, since the center will be walled off from the dry air that is currently interfering with development. Bermuda radar shows weak rain bands from Sean rippling across the island, with the strongest rain showers well to the island's southwest. Sustained winds at the Bermuda airport have been under 30 mph this morning. Sustained winds near tropical storm force were occurring this morning at buoy 41048, about 300 miles west of Bermuda. Winds at the buoy were 38 mph, gusting to 47 mph at 6:50 am EST. Strong upper-level winds out of the west are creating about 20 knots of wind shear over Sean, which is low enough to allow some slow development. Sean is a relatively shallow storm, and the tops of its thunderstorms extend up only to about the 300 mb level. Normally, a tropical storm extends up to about 200 mb. The shallow nature of Sean's thunderstorms mean that the storm is less vulnerable to wind shear than normal, since the storm is not feeling the strongest winds aloft. Ocean temperatures are near 26.5°C (80°F), which is right at the boundary of being warm enough to support tropical storm formation.

Forecast for Sean
Sean will drift slowly west or northwest today and Wednesday. The latest SHIPS model forecast predicts wind shear will remain about where it is now through Thursday morning, which should allow Sean to slowly intensify to a 50 mph storm. If Sean can make the transition to a fully tropical storm, more significant intensification can occur. The computer models show little or no development of Sean, with none of our reliable models predicting it will become a hurricane. Bermuda is the only land area that need concern itself with Sean, as a trough of low pressure is expected to absorb the storm on Thursday and lift it quickly to the north or northeast. The center of Sean could pass close enough to Bermuda to bring the island heavy rain squalls and sustained winds of 40 - 45 mph on Thursday and Friday. NHC is giving a 28% chance that Bermuda will receive tropical storm-force winds of 39 mph. High wind shear should destroy Sean on Friday.


Figure 2. MODIS image of the hybrid low named "Rolf" in the Mediterranean Sea at 10:30 UTC November 8, 2011. Image credit: NASA.

Unusual tropical storm-like low forms off coast of France
An unusual hybrid low pressure system has formed in the Mediterranean Sea, about 100 miles south of the coast of France. The low began as an extratropical storm named "Rolf", but has stalled out over the relatively warm waters of the Mediterranean over the past two days, and has acquired tropical characteristics. Heavy thunderstorms have built over the northeast portion of the low, and the storm has a symmetric spiral shape with a cloud-free center, like a tropical storm. The Navy is calling this system Invest 99L. The National Hurricane Center is not responsible for the Mediterranean Sea, so they are not issuing any products for 99L. NOAA's Satellite and Information Service (NESDIS) is giving 99L a tropical classification based on its satellite presentation, with winds in the 40 - 45 mph range. French radar shows heavy rains from 99L are beginning to affect Southeast France and the island of Corsica. The Lion Buoy, located about 100 miles to the west of the center of 99L, recorded sustained winds of tropical storm force, 40 mph, at 00 UTC yesterday. Water temperatures at the buoy were 17°C (63°F), far below the 26°C threshold usually needed to sustain a tropical storm. The coldest waters I've seen a tropical storm form in were 22°C during Hurricane Epsilon of 2005. I doubt that NHC would name this system if they did have responsibility for the Mediterranean, due to the cold water temperatures.

"Rolf" is expected to move slowly northwards into the coast of South France by Wednesday night. Meteo France is predicting heavy rains of 30 - 40 mm/hr (1.2 - 1.6"/hr) will affect the coast Tuesday night through Wednesday, with sustained winds of 50 mph, gusting to 75 mph.


Figure 3. Hybrid subtropical storm of October 8, 1996, off the coast of Italy. According to Reale and Atlas (2001), the storm had characteristics similar to a hurricane, but formed over water of 21.5°C. "The maximum damage due to wind occurred over the Aeolian Islands, at 38.5°N, 15°E, to the northeast of Sicily: assistance for disaster relief was required. Unfortunately, no weather station data were available, but the media reported sheds, roofs and harbor devices destroyed, and houses and electric lines damaged, due to "extremely strong westerly wind." The perfect agreement between the observations at Ustica, the storm scale, the eye-like feature position and the damages over the Aeolian Island reasonably suggest that the hurricane-level intensity of 32 m/s (72 mph) was reached over the Aeolian Islands." A similar hybrid low affected Algeria on 9 - 10 November 2001. This storm produced upwards of 270 mm (10.6") of rain, winds of 33 m/s (74 mph), and killed 737 people near Algeirs, mostly from flooding and mud slides. Image credit: Dundee satellite receiving station.

According to research published by Gaertner et al. (2007), an increase in ocean temperatures of 3°C in the Mediterranean by the end of the century could lead to hurricanes forming there. Miguel Angel Gaertner of the University of Castilla-La Mancha in Toledo, Spain, ran 9 different climate models with resolutions of about 50 km and found that some (but not all) of the models simulated hurricanes in the Mediterranean in September by the end of the century, when ocean temperature could reach 30°C.

Though the Mediterranean may start seeing hurricanes by the end of the century, these storms should be rare and relatively short-lived for three reasons:

1) The Mediterranean is quite far north and is subject to strong wind shear from jet stream activity.

2) The waters are shallow, and have relatively low heat content. There is no deep warm water current like the Gulf Stream.

3) The Mediterranean has a lot of large islands and peninsulas poking into it, increasing the chances that a tropical storm would weaken when it encountered land.

References
Meteo France has an interesting animation of the predicted winds and temperatures over the next few days.

Gaertner, M. A., D. Jacob, V. Gil, M. Dominguez, E. Padorno, E. Sanchez, and M. Castro (2007), Tropical cyclones over the Mediterranean Sea in climate change simulations,, Geophys. Res. Lett., 34, L14711, doi:10.1029/2007GL029977.

Reale, O., and R. Atlas. 2001: Tropical Cyclone-Like Vortices in the Extratropics: Observational Evidence and Synoptic Analysis, Weather and Forecasting, 16, No. 1, pp. 7-34.


Figure 4. Radar reflectivity image from the Tipton, OK tornado of November 7, 2011, showing a classic hook echo.


Video 1. Reed Timmer video of the November 7, 2011 tornado in Tipton, OK. Here's another excellent video of the Tipton tornado and a tornado near Manitou, OK from Texas Storm Chasers. Storm chasing IS dangerous: one storm chaser had his vehicle overturned, but got into another vehicle and continued the chase.

Shaken and stirred: an earthquake and tornado for Oklahoma
It was a rare multi-natural hazard day for Oklahoma yesterday, as the state experienced both a tornado and an earthquake, six hours apart. The damaging magnitude 5.6 earthquake that shook the state Saturday night spawned a magnitude 4.7 aftershock at 8:46 pm CST yesterday, 44 miles east of Oklahoma City. And at 2:47 pm CST, a tornado touched down in Southwest Oklahoma near Tipton. The tornado destroyed an Oklahoma State University agricultural office, and damaged a hay barn at a dairy farm. No injuries were reported. The UK MailOnline has an interesting article showing the radar image from Saturday's quake, which captured a massive groups of birds and insects that took flight after the ground shook.

This afternoon, NOAA's Storm Prediction Center has placed Southeast Oklahoma, East Texas, Southeast Missouri, and most of Arkansas in its "Slight Risk" area for severe weather, thanks to a strong low pressure system moving across the Plains. During the late afternoon, severe thunderstorms with high winds and large hail and expected over the region, and we cannot rule out an isolated tornado.

Bering Sea superstorm targets Alaska
A massive blizzard the National Weather Service is calling one of the most severe Bering Sea storms on record is gathering strength today to the west of Alaska. The storm is expected to "bomb" to a central pressure of 945 - 950 mb Tuesday night, and to 940 mb on Wednesday. These pressures, characteristic of a Category 3 hurricane, will be strong enough to generate sustained winds of Category 1 hurricane force over the waters to the west of Alaska, with winds of 50 - 70 mph expected along portions of the coast. Nome, Alaska is expecting a storm surge of 8 - 10 feet. Waves of 15 - 25 feet with ice on top will batter the shores, causing severe damage to the coast.

Jeff Masters

Chaser Cap (OIG)
This is a screen capture taken during a chase near Lawton, OK.
Chaser Cap

Reader Comments

Comments will take a few seconds to appear.

Post Your Comments

Please sign in to post comments.

or Join

Not only will you be able to leave comments on this blog, but you'll also have the ability to upload and share your photos in our Wunder Photos section.

Display: 0, 50, 100, 200 Sort: Newest First - Order Posted

Viewing: 239 - 189

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7Blog Index


Cayman Brac








Member Since: Posts: Comments:
238. Skyepony (Mod)
01M is beginning to look like it's had too much land interaction. Interesting is the sister storm over land just east of 01M, how like waves they are supporting each other..
Member Since: August 10, 2005 Posts: 192 Comments: 38628
Au revoir Rolf. You've been a very incredible storm.
Member Since: Posts: Comments:
Today 3 years ago:

Member Since: July 6, 2010 Posts: 113 Comments: 32512
Quoting superpete:
Thanks for the reminder! makes you stop and recall what you were doing. How about the weather this week? We have had the ac shut down, all the windows open at night, just magic now compared to the summer we have had. Kind of odd how quick the winter switch got turned on tho'?
P
It really has been a relief with the weather cooling down. We have been having a few early morning showers the past few days too.
Member Since: Posts: Comments:
234. Skyepony (Mod)
Sean TRMM pass. Click for Quicktime. Not as shallow as many Tropical Storms seen this season, especially for the spotty convection.
Member Since: August 10, 2005 Posts: 192 Comments: 38628
Quoting stormwatcherCI:
I have noticed throughout the day that moisture has been increasing down there. BTW, today is the 3rd anniversary Of Paloma for the Cayman Islands.
Thanks for the reminder! makes you stop and recall what you were doing. How about the weather this week? We have had the ac shut down, all the windows open at night, just magic now compared to the summer we have had. Kind of odd how quick the winter switch got turned on tho'?
P
Member Since: Posts: Comments:
Plotting the coordinates provided in TropicalStormSean's_9Nov_12amGMT_ATCF,
starting 7Nov_12amGMT and ending 9Nov_12amGMT

TS.Sean has traveled 110miles in 48hours at an average speed of ~2.3mph(3.7k/h)
for a total position change of 73miles(~117kilometres)westward

Copy&paste 27.8n68.7w-27.7n68.8w, 27.7n68.8w-27.6n69.0w, 27.6n69.0w-27.5n69.3w, 27.5n69.3w-27.4n69.5w, 27.4n69.5w-27.5n69.4w, 27.5n69.4w-27.6n69.4w, 27.6n69.4w-27.8n69.6w, 27.8n69.6w-27.8n69.9w, 27.8n68.7w-27.8n69.9w into the GreatCircleMapper for more info
Member Since: Posts: Comments:
231. Skyepony (Mod)
Member Since: August 10, 2005 Posts: 192 Comments: 38628
Quoting TropicalAnalystwx13:
Models are beginning to latch on to the idea of low pressure developing in the SW Caribbean as we head into next week...Maybe we'll have yet another tropical cyclone?


Seems like only Rina didn't want to form..took her 3 tries. All the other storms this year though..20% at 2pm usually means a named storm at 5pm!

Although, I would absolutely love to tie 2005 for amount of storms to form in November, however unlikely that is, it would be an awesome way to end an unusual season.
Member Since: Posts: Comments:
Models are beginning to latch on to the idea of low pressure developing in the SW Caribbean as we head into next week...Maybe we'll have yet another tropical cyclone?
Member Since: July 6, 2010 Posts: 113 Comments: 32512
Member Since: Posts: Comments:
Quoting Levi32:


Not in the near future, because having the anchoring polar low over Siberia favors troughing in Greenland, not the eastern United States. The ensembles have a quick trough coming through there in a couple days but it's not in a pattern where it will really want to dig in. It's also not yet clear whether the NAO will actually tank. The GFS tends to overdo blocking over Greenland sometimes in these patterns.

(This post has nothing to do with what has been posted above.)

Levi, every time you say the season is over, we get another storm. Just say that we'll see another Atlantic storm after Sean. :P
Member Since: July 6, 2010 Posts: 113 Comments: 32512
Quoting weatherbro:
I wonder if this Alaskan superstorm will corespondent to deep troughing in the East. With a tanking AO/NAO, I wouldn't doubt it.


Not in the near future, because having the anchoring polar low over Siberia favors troughing in Greenland, not the eastern United States. The ensembles have a quick trough coming through there in a couple days but it's not in a pattern where it will really want to dig in. It's also not yet clear whether the NAO will actually tank. The GFS tends to overdo blocking over Greenland sometimes in these patterns.
Member Since: November 24, 2005 Posts: 635 Comments: 26684
Radio and television broadcasts will be interrupted at 1 p.m. Wednesday for a nationwide test of the Emergency Alert System.

The alert will last about 30 seconds. Though the alert system is decades old and is often tested and used at the local level, it has never been tested on a nationwide scale before now, according to the Federal Communications Commission.
As part of the test, St. Bernard Parish will sound its outdoor emergency siren system at the same time.
The test, being conducted by the FCC, the Federal Emergency Management Agency and the National Weather Service, will occur simultaneously in all 50 states and in U.S. territories.
The drill is designed to test a system that would allow the president or other federal officials to commandeer the airwaves in an emergency to warn of immediate danger such as a tsunami or earthquake to a regional or national audience, according to FEMA.
Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting stormwatcherCI:
I have noticed throughout the day that moisture has been increasing down there. BTW, today is the 3rd anniversary Of Paloma for the Cayman Islands.


Ah, so it is.
Member Since: Posts: Comments:
Quoting interstatelover7165:
Speaking of which, there hasn't been a lot of them for a while.


Maybe because people actually wised up and starting ignoring them, like you're supposed to?
Member Since: Posts: Comments:



458
WFUS54 KSHV 090042
TORSHV
LAC013-027-061-119-090130-
/O.NEW.KSHV.TO.W.0094.111109T0042Z-111109T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
642 PM CST TUE NOV 8 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
NORTHWESTERN LINCOLN PARISH IN NORTH CENTRAL LOUISIANA...
NORTH CENTRAL BIENVILLE PARISH IN NORTHWEST LOUISIANA...
SOUTHERN CLAIBORNE PARISH IN NORTHWEST LOUISIANA...
EAST CENTRAL WEBSTER PARISH IN NORTHWEST LOUISIANA...
THIS INCLUDES THE CITY OF MINDEN...

* UNTIL 730 PM CST

* AT 637 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES WEST OF
GIBSLAND...OR 8 MILES SOUTHEAST OF MINDEN...MOVING NORTHEAST AT 35
MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ARCADIA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.



LAT...LON 3284 9282 3262 9254 3244 9316 3263 9330
TIME...MOT...LOC 0041Z 243DEG 29KT 3257 9313

Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting KoritheMan:


Indeed. Like hell I'm gonna let trolls rain on my parade.
Speaking of which, there hasn't been a lot of them for a while.
Member Since: Posts: Comments:
Quoting KoritheMan:


Possibly, but the models differ pretty somewhat in regards to timing. Anything brewing should originate in the southwest Caribbean.
I have noticed throughout the day that moisture has been increasing down there. BTW, today is the 3rd anniversary Of Paloma for the Cayman Islands.
Member Since: Posts: Comments:
Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting stormwatcherCI:
Hi Kori, you seeing anything in the near future in the Caribbean in your crystal ball ?


Possibly, but the models differ somewhat in regards to timing. Anything brewing should originate in the southwest Caribbean.
Member Since: Posts: Comments:
Quoting Articuno:
I would stay here no matter what...


Indeed. Like hell I'm gonna let trolls rain on my parade.
Member Since: Posts: Comments:
Quoting Articuno:
I would stay here no matter what...


I will never say never !!! LOL

check your mail by the way.
Member Since: Posts: Comments:
Quoting KoritheMan:


If it's the one I'm thinking of, I was invited by PrivateIdaho about a month ago, but I never did anything with it.
Hi Kori, you seeing anything in the near future in the Caribbean in your crystal ball ?
Member Since: Posts: Comments:



Member Since: July 3, 2005 Posts: 426 Comments: 129089
I would stay here no matter what...
Member Since: October 22, 2011 Posts: 0 Comments: 2541
I wonder if this Alaskan superstorm will corespondent to deep troughing in the East. With a tanking AO/NAO, I wouldn't doubt it.
Member Since: Posts: Comments:
210. Skyepony (Mod)
Quoting HurrikanEB:
I've been trying to follow along with the Mediterranean system since yesterday, but can someone just clarify it a little bit for me?

As I understand the satellite based... interpretations.. have suggested that the system is "tropical," but have any of the official weather agencies (Berlin, NHC, or other) actually described it as a tropical storm? (I know it's out of NHC jurisdiction, so they probably don't have much to say)



You can see here on NOAA's tropical position page that they had it subtropical when it was an invest & when it tightened into a depression it became tropical. I agree with the change, the convection went to a tight warm core ball then they changed it.

Mediterranean Sea:

DATE/TIME LAT LON CLASSIFICATION STORM
08/1800 UTC 42.8N 6.5E T3.0/3.0 01M
08/1200 UTC 42.1N 6.2E T2.5/3.0 01M
08/0600 UTC 41.5N 5.8E T3.0/3.0 01M
08/0000 UTC 41.4N 5.4E T3.0/3.0 01M
07/1800 UTC 41.1N 5.3E T2.5/2.5 01M
07/1200 UTC 40.6N 5.9E ST1.5 INVEST

Member Since: August 10, 2005 Posts: 192 Comments: 38628
Quoting SunnyDaysFla:
I still prefer this site, but I have tried the other. I will e-mail if you ask.



If it's the one I'm thinking of, I was invited by PrivateIdaho about a month ago, but I never did anything with it.
Member Since: Posts: Comments:
I still prefer this site, but I have tried the other. I will e-mail if you ask.

Member Since: Posts: Comments:


SEL7

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 877
NWS STORM PREDICTION CENTER NORMAN OK
530 PM CST TUE NOV 8 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

SOUTHERN AND EASTERN ARKANSAS
WESTERN AND CENTRAL LOUISIANA
EAST TEXAS
COASTAL WATERS

EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 530
PM UNTIL 100 AM CST.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF PINE
BLUFF ARKANSAS TO 25 MILES EAST SOUTHEAST OF PORT ARTHUR TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 875...WW 876...

DISCUSSION...TSTMS...INCLUDING POSSIBLE SUPERCELLS...EXPECTED TO
PERSIST THROUGH AT LEAST MID EVE ALONG PRE-FRONTAL N-S CONFLUENCE
LINE IN E TX AND WRN/SRN LA. OTHER STORMS MAY CONTINUE TO FORM
ALONG THE FRONT IN SW AR. WITH TIME THE STORMS SHOULD MOVE/DEVELOP
GENERALLY NEWD. WHILE DIMINISHING LOW LVL CAPE ULTIMATELY WILL
WEAKEN UPDRAFT STRENGTH...CONTINUING PRESENCE OF RICH MOISTURE
INFLOW/SELY SFC WINDS LIKELY WILL MAINTAIN SOME RISK FOR
TORNADOES/LOCALLY DMGG WIND IN E TX/LA.
FARTHER N...COMPARATIVELY WEAKER LOW LVL LAPSE RATES/MORE LIMITED
MOISTURE MAY BE OFFSET BY STRONGER DEEP SHEAR/FORCING FOR ASCENT
ASSOCIATED WITH THE CONTINUED NE MOVEMENT OF OK UPR TROUGH TO
MAINTAIN A RISK FOR ISOLD TORNADOES/DMGG WIND IN SRN/ERN AR. THIS
THREAT ULTIMATELY MAY EXTEND STILL FARTHER N/NE INTO CNTRL/NERN
AR...ALTHOUGH CONFIDENCE IN SVR THREAT IN THOSE AREAS ATTM SEEMS TOO
LOW TO WARRANT A WW.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 23035.


...CORFIDI
Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting Articuno:

New blog?
New site?
imustknow



I would tell you but I don't know where is it. You see. I'm still here.
Member Since: Posts: Comments:
Quoting WeatherfanPR:



I don't know where but I read here that there is a new blog or website I don't know where it is and there is where a lot of people has migrated.

New blog?
New site?
imustknow
Member Since: October 22, 2011 Posts: 0 Comments: 2541
Quoting HurricaneDean07:
Quoting Bahahurrican:
Evening everybody. I'm still at work, but noticing the interesting weather out there in the ATL today.... we've had "hasty" winds all day, and the waves were crashing ashore as I drove in about 12 hours ago. I watching now to see how much Sean deepens.

And a Mediterranean storm! This has been one weird season....


There has actually been 14 occasions that there has been a sub-tropical/tropical system(4 hurricane type storms)in the mediterranean.


Mediterranean Cyclones via wikipedia Link

I was actually surprised by the number of similar occurrences, and think that these storms alone could be an interesting research topic.
Member Since: Posts: Comments:
203. eths
Quoting yqt1001:
"Le TMS (Tropical-like Mediterranean Storm) "01M" qui se situe au large de la Cote d'Azur occasionne des vents tr�s violents et une importante houle sur l'Est du Var. " Hmm..an official storm category called "Tropical-like Mediterranean Storm" sounds like a good one for 01M. Anyways looking through that website it looks like the highest 1-min sustained (I think) wind found was 104km/h..so that's 60mph winds?


100 kmh is about 60 mph and 150 kmh is roughly 90 mph.
Member Since: Posts: Comments:
Member Since: July 6, 2010 Posts: 113 Comments: 32512
Quoting Bahahurrican:
Evening everybody. I'm still at work, but noticing the interesting weather out there in the ATL today.... we've had "hasty" winds all day, and the waves were crashing ashore as I drove in about 12 hours ago. I watching now to see how much Sean deepens.

And a Mediterranean storm! This has been one weird season....


There has actually been 14 occasions that there has been a sub-tropical/tropical system(4 hurricane type storms)in the mediterranean.
Member Since: Posts: Comments:

Member Since: July 14, 2009 Posts: 51 Comments: 1731
199. eths
Various clips from 01M in southern France can be found here.
Member Since: Posts: Comments:
Very well-defined tropical cyclone, although it still has some characteristics of a Subtropical storm, markedly the fact that the strongest winds are still located away from the center.

(Second image is more recent, but doesn't catch as much of the system.)



Member Since: July 6, 2010 Posts: 113 Comments: 32512
"Le TMS (Tropical-like Mediterranean Storm) "01M" qui se situe au large de la Cote d'Azur occasionne des vents trs violents et une importante houle sur l'Est du Var. " Hmm..an official storm category called "Tropical-like Mediterranean Storm" sounds like a good one for 01M. Anyways looking through that website it looks like the highest 1-min sustained (I think) wind found was 104km/h..so that's 60mph winds?
Member Since: Posts: Comments:
Quoting eths:
My french is not very good, but if I understand correctly: http://www.infoclimat.fr/ is reporting sustained winds for 01M (Rolf) of 100km/h with gusts of up to 154 kmh.
I see that. 2 Gust of above 130km.
Member Since: Posts: Comments:
195. eths
My french is not very good, but if I understand correctly: http://www.infoclimat.fr/ is reporting sustained winds for 01M (Rolf) of 100km/h with gusts of up to 154 kmh.
Member Since: Posts: Comments:
I don't know much about this Winter Storms but this Huge Storm near Alaska could be a very nasty one.
Member Since: Posts: Comments:
Evening everybody. I'm still at work, but noticing the interesting weather out there in the ATL today.... we've had "hasty" winds all day, and the waves were crashing ashore as I drove in about 12 hours ago. I watching now to see how much Sean deepens.

And a Mediterranean storm! This has been one weird season....
Member Since: Posts: Comments:
echo echo echo !!!
Member Since: Posts: Comments:
Member Since: July 6, 2010 Posts: 113 Comments: 32512
7 pm out, no change in strength with Sean.
Member Since: July 8, 2005 Posts: 259 Comments: 24468
Really nice hook forming on Twarned Cell in NW LA. Just south of Shreveport.
Member Since: Posts: Comments:

Viewing: 239 - 189

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7Blog Index

Top of Page

About

Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

Local Weather

Overcast
45 °F
Overcast