Little Change to 91L; Amateur Storm Chaser Killed in May 31 El Reno, OK Tornado

By: Dr. Jeff Masters , 2:59 PM GMT on June 04, 2013

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There has been little change to tropical disturbance 91L in the Southeast Gulf of Mexico and Western Caribbean. Satellite loops show a large area of heavy thunderstorms with poor organization, and there is no evidence of an organized surface circulation trying to form. Wind shear is a high 30 knots, and is forecast to remain high, 20 - 30 knots, today, so any development should be slow to occur. However, wind shear is predicted to drop to the moderate range, 10 - 20 knots, on Wednesday, which should give 91L a better chance to organize. NHC is giving the disturbance a 30% chance of developing into a tropical cyclone by Thursday. I put these odds higher, at 40%. The Hurricane Hunters are on call to fly into 91L on Tuesday afternoon, but this flight will likely be cancelled. Regardless of whether or not 91L develops into a tropical depression, heavy rains will be the storm's main threat. Mexico's Yucatan Peninsula, Western Cuba, and South Florida can expect 5 - 8" of rain from the disturbance over the next four days. Heavy rains from 91L may spread up the U.S. East Cost late this week. The computer models predict that 91L should stay large and poorly organized, and if it does develop, it will be difficult for it to get any stronger than a 45 mph tropical storm in the Gulf of Mexico.


Figure 1. Latest satellite image of Invest 91L.


Video 1. The May 31, 2013 El Reno, Oklahoma EF-3 tornado as filmed from a commercial tornado tour led by Tempest Tours. This is one of the most impressive videos I've ever seen, from a meteorological standpoint, of a developing tornado. It appears that the chasers got closer to the tornado than they liked, as evidenced by the honking horns you hear, telling people to leave, a few minutes into the video.

Amateur storm chaser killed in Friday's El Reno tornado
Tornado scientist Tim Samaras and his two chase partners, Paul Samaras and Carl Young, were killed Friday by an EF-3 tornado that hit El Reno, Oklahoma. It has now been revealed that the storm killed an amateur storm chaser, Richard Charles Henderson. According to an article in The Oklahoman,

From his pickup, amateur storm chaser Richard Charles Henderson took a cellphone photo of the first tornado Friday and excitedly sent it to a friend. Minutes later, that tornado would kill him.

“That was the end of his life right there,” said the friend, George “Sonny” Slay. “He said, ‘I'm having fun,'” Slay recalled Monday. “He told me he was riding around … chasing the storms …. I said, ‘You better quit that!'
“And, then, I guess he was en route to the position that he got in because he said, ‘There goes Channel 9!' He said, ‘You might even see me on TV.' And, then a few seconds later, he said, ‘Oop, there's Channel 5!'”

Slay said the picture came in at 6:05 p.m. About 10 minutes later, Slay heard a loud popping noise over the phone. Henderson cursed, and then asked Slay if he had heard the sound.

“I said, ‘Yeah, I heard it. What was it?' And he said, ‘It's debris hitting my pickup.' I said, ‘You better get your ass out of there.' Then the phone went dead.

Henderson, of Hinton, was one of at least 18 people who died because of Friday's tornadoes and storms. His body was found near El Reno.


Henderson's death underscores the dangers of storm chasing by people who don't know what they are doing, and is also likely the unfortunate consequence of the huge amount of dramatic media attention that storm chasing has received in recent years.


Video 2. The view from my veteran storm chaser Chris Novy's D-TEG dashcam as he accidentally drove his storm chasing vehicle into a swollen creek, nearly killing him.


Figure 2. Chris Novy posted on his Facebook page this image of the bridge he drove off. Note the guard rail that stops short of the plunge he took. I hope the road commission extends this guard rail to prevent a future accident!

Veteran storm chaser almost killed in Friday's El Reno flash flood
There is also news that another veteran storm chaser, Chris Novy, nearly died in Friday's storm--but from a flash flood. As Novy recounted in Mike Smith Enterprises Blog,

"I approached a flooded road and made a quick U-turn rather than driving [all the way] into the water. This was a naturally smart move. Unfortunately my turn resulted in me plunging off a hidden embankment and splashing nose-first right into a swollen creek where I sunk straight to the bottom, I traveled several hundred feet underwater with the car quickly filling up. At one point I was completely surrounded by water and just holding my breath in the darkness. Somehow the driver-side and passenger-side windows broke and I was flushed from the vehicle. I surfaced after a bit and found myself racing down the creek. A cop called out to me and I was able to swim to him and his life-saving grab.

Analysis:
It probably would have been best for the police car (seen right before my turn) to have completely blocked the road the emergency lights on. As it was, the scene seemed like just a water hazard but probably should have been clearly marked as a no-go zone.

I should have come to a complete stop and taken more time to evaluate the situation. Ideally I should have just put it into reverse and slowly backed out. I took a dangerous situation and made it even worse leaping before I looked.

Lessons learned:
Turn around, don't drown!"



Figure 3. Portlight volunteers hard at work in Moore, Oklahoma, after the devastating May 20, 2013 tornado.

Portlight helping victims of Oklahoma tornadoes, and hosting the Getting It Right Conference
I had the pleasure last night of giving the welcoming speech to the attendees of the "Getting It Right Conference" in Atlanta, hosted by my favorite disaster relief charity, Portlight.org.The conference has brought together over 125 disaster response professionals to discuss shelter and transportation accessibility for people with disabilities. There will be live blogging from the conference on Portlight's wunderground blog, 8am to 5pm Tuesday, and 8am to 11am on Wednesday. Check it out! It's remarkable how far Portlight has come since its humble beginnings in September 2008, when wunderground members Patrick Pearson and Paul Timmons put together a grass-roots effort to help out victims of Hurricane Ike. Portlight has now dispensed over $2 million in aid to the needy, and hundreds of volunteers have worked on various Portlight projects since 2008. Indeed, Portlight volunteers are now hard at work helping victims of Oklahoma's devastating May tornadoes. Keep up the great work!

Jeff Masters

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Thanks for the update Doc,
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Quoting CybrTeddy:
OKC was hit with two EF-5 tornadoes in a week of each other.




did the NWS find any EF5 damgs with this nado
Member Since: May 21, 2006 Posts: 5091 Comments: 114649
OKC was hit with two EF-5 tornadoes in a week of each other. Upgrade was based on a DOW reading of 296mph winds. Unclear if those were surface winds.
Member Since: July 8, 2005 Posts: 259 Comments: 23489


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.
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Quoting sar2401:

What's even more scary to me is that, except for the death reported last night, all the other deaths and serious injuries occured to people with the scientific background and all the communication tools available that should have made sure this didn't happen. I learned from my NWS storm spotter experiences that rain wrapped tornadoes are killers and that we still don't have the tools to prevent one from sneaking up on you and getting you. I do hope people who are out there doing this for "fun" reconsider in the future but I somehow doubt it.


What I think that also should be noted in the Tempest Tour videos was just how crazy others (looks like a professional) were driving. After the tour has turned around and left, a chaser passes them on the left and, to avoid a head-on collision with another vehicle (who was in the right), goes off to the left into the drainage ditch.

To get an idea of how out-of-control the situation is, check out this video of the chasers converging on the May 31, 2013 storm.

SpotterNetwork "ant trails" May 31, 2013 Oklahoma Killer Tornado

And these are only the professionals. Multiply that by 3 or 4,to estimate the number of chasers (amateurs and professionals) and you have a more realistic idea of how the situation is out-of-hand. Especially on the roads here in OK.
Member Since: June 25, 2011 Posts: 2 Comments: 3731
The National Weather Service has upgraded last week’s deadly tornado in El Reno to an EF-5.

The Weather Service says the tornado had winds with speeds up to 296 miles per hour.

The tornado was also double the size of the May 20 tornado that destroyed neighborhoods and two schools in nearby Moore.

The El Reno tornado was a record-breaking 2.6 miles wide.

The Oklahoma medical examiner's office said Monday that 18 people died as a result of the powerful storms that swept through the Oklahoma City area late Friday. The previous death toll had been 14.

Spokeswoman Amy Elliott says the dead include 12 adults and six children. Seven remain unidentified.

The National Weather Service says five tornadoes touched down Friday, along with heavy rain that caused widespread flooding. Some victims have been difficult to find because their bodies floated away.

Among those killed were storm chasers Tim Samaras, his son Paul, and colleague Carl Young. They were killed in the tornado that struck El Reno.

The Associated Press contributed to this report.

Link
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Quoting palmbaywhoo:
The loss of these 4 brave men (brave not stupid) shows the need for their research! If the best of the best (I dont see any amateurs who were lost or injured)got caught and hurt in this storm, that alone shows the need to study and understand how and why these unpredictable storms work. There was obviously some very odd dynamics at work in this storm system and their loss while tragic may have opened up more eyes and shown the dire need to properly prepare

Re-read the story that Dr. Masters posted. Henderson was clearly a rank amateur. He was not out there to "study" tornadoes. I wouldn't say anyone was stupid but it certainly appears Henderson was incredibly foolish.
Member Since: October 2, 2004 Posts: 0 Comments: 12754
Quoting CybrTeddy:
The El Reno tornado has been upgraded to an EF-5 and is also the largest tornado ever recorded at 2.6 miles.

I believe it.
Member Since: June 2, 2013 Posts: 6 Comments: 992
anyway I is hitting the shower I'll be back later see what happening
Member Since: June 13, 2009 Posts: 2 Comments: 10852
Wow. DOW found winds of 296 mph. Very fast.
Link
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Quoting GeorgiaStormz:
I wouldnt count out a new llc forming by convection



The old circulation by 90W is moving out to the WNW. Which could indicate that 90L is ejecting its weak LLC and reforming one near the tip of the Yucatan. We will have to wait and see later today. If this verifies we may start to see some organization into the first storm of the season. That is its only option if its going to develop or not.
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Quoting CybrTeddy:
The El Reno tornado has been upgraded to an EF-5 and is also the largest tornado ever recorded at 2.6 miles.
Wow. Link?
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The El Reno tornado has been upgraded to an EF-5 and is also the largest tornado ever recorded at 2.6 miles.
Member Since: July 8, 2005 Posts: 259 Comments: 23489
Quoting Neapolitan:
From what I've read, those higher numbers are including all deaths during the event, including those from flooding, as well as indirect deaths caused by car crashes and the like (just as hurricane death tolls will include people who die of carbon monoxide poisoning from running a generator in their tent two weeks after a storm has destroyed their home). I should have been more specific and said that I was referring to direct tornado deaths.

At any rate: one chaser death is needless, and therefore too many. But four? Seriously?

What's even more scary to me is that, except for the death reported last night, all the other deaths and serious injuries occured to people with the scientific background and all the communication tools available that should have made sure this didn't happen. I learned from my NWS storm spotter experiences that rain wrapped tornadoes are killers and that we still don't have the tools to prevent one from sneaking up on you and getting you. I do hope people who are out there doing this for "fun" reconsider in the future but I somehow doubt it.
Member Since: October 2, 2004 Posts: 0 Comments: 12754
150. Mikla
Quoting Andrebrooks:
The 12z run still shows invest 91 L near Yucutan and with the convection,and even the winds are stronger.

It has not hardly moved. Some folks keep saying that the center is higher but I think they are fooled by the sat images showing some rotation at the mid levels around 24N. If you look at OSCAT and ASCAT along with various sat images you will see the "center" (I use this term loosely) is still somewhere between 21N and 22N.
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hmm I'm noticing the convection is moving S and spreading out
Member Since: June 13, 2009 Posts: 2 Comments: 10852
TWC this said that El Reno, Union City tornado was rated a EF5
Member Since: May 21, 2006 Posts: 5091 Comments: 114649
Did they announce wind speeds as well the el Reno tornado?
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Quoting Andrebrooks:
Yes

NO
I don't like to use it cause sometimes it not that accurate sometimes I see two completely different things that graphic and what satellite, hurricane hunters, and surface obs show. that is one of which I don't really like using it
Member Since: June 13, 2009 Posts: 2 Comments: 10852
Quoting GeorgiaStormz:



I dont trust strongest tornado estimates.....a lot of tornadoes i think we'll never know how strong they actually might have gotten


"On record".

All data is like that. We don't have perfect knowledge, we only have data and probabilities.
Member Since: January 25, 2012 Posts: 33 Comments: 1520
The loss of these 4 brave men (brave not stupid) shows the need for their research! If the best of the best got caught and hurt in this storm, that alone shows the need to study and understand how and why these unpredictable storms work. There was obviously some very odd dynamics at work in this storm system and their loss while tragic may have opened up more eyes and shown the dire need to properly prepare
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I wouldnt count out a new llc forming by convection

Member Since: Posts: Comments:
Quoting GeorgiaStormz:


when was it 2.6 miles wide?

I know the velocity field was wide, but the tornado never seemed to have touched down for a long time, while that wide.

At least i havent seen a video of a 2.6mile wide tornado, just isolated wedge shots, and a lot of multiple vortices images and video.
So if we have a multi-vortice event with those vortices scouring a connected terrain field (CTF -yes I just made this up but it sounds pro don't it?!) would that be considered a single tornado with the corresponding width?
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Well if we went by the CMC yesterday..we should have Andrea by this evening (NOT)

CMC=Constantly Making Cyclones.

though it's almost a 50-50 chance something could Weds evening or Thurs before moving into the Big Bend of Florida
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Quoting sar2401:

I see a very broad, shallow, 28 knot area of low pressure that is still partially over land and has barely moved in three days. Is there something there I'm supposed to be getting more excited about?

I don't use that for a few reasons
Member Since: June 13, 2009 Posts: 2 Comments: 10852
Quoting RTSplayer:


So I guess that makes it largest in diameter on record, and second most powerful peak winds on record?



I dont trust strongest tornado estimates..... for a lot of tornadoes I think we'll never know how strong they actually might have been at their peak.
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Quoting sar2401:

I see a very broad, shallow, 28 knot area of low pressure that is still partially over land and has barely moved in three days. Is there something there I'm supposed to be getting more excited about?
Yes
Member Since: March 25, 2013 Posts: 29 Comments: 991
Quoting Andrebrooks:
The 12z run still shows invest 91 L near Yucutan and with the convection,and even the winds are stronger.

I see a very broad, shallow, 28 knot area of low pressure that is still partially over land and has barely moved in three days. Is there something there I'm supposed to be getting more excited about?
Member Since: October 2, 2004 Posts: 0 Comments: 12754
Quoting Skyepony:
I don't remember ever seeing cyclone type unknown at the top of the NCAR storm model product..even lastnight when I was looking at it.
I think we can safely assume: BLOB
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Quoting scottsvb:


look at current maps never old


current map show the same thing dude it in the loop the loop just show the evolution of things that is it the current one I've seen and it still show what I said earlier so yeah look at the current one but look at the loop and see how it evolved
Member Since: June 13, 2009 Posts: 2 Comments: 10852
Quoting RTSplayer:


So I guess that makes it largest in diameter on record, and second most powerful peak winds on record?




yes but will need too wait too see if this info is ture or not from nws
Member Since: May 21, 2006 Posts: 5091 Comments: 114649
Quoting Tazmanian:
UPDATE: The US National Weather Service Norman Oklahoma has just upgraded the May 31 El Reno, Union City tornado to an EF-5, 2.6 mile-wide twister. It is now the largest tornado ever recorded.

The upgrade was based on information from a Dopler On Wheels (DOW) that measured low level winds of 296 miles per hour.



from here


Link


So I guess that makes it largest in diameter on record, and second most powerful peak winds on record?
Member Since: January 25, 2012 Posts: 33 Comments: 1520
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Quoting sar2401:

For some reason, the death toll is being report as between 10 and 18, but that does not diminish your point. Being on the road in any storm is dangerous. Being on the road in the interests of science is dangerous but at least there's a higher motive. Being on the road during a storm to take videos as part of the media or in hopes of making money is a dangerous occupation. Being on the road in a storm just because you like to chase storms and see tornadoes is just plain foolish. Hauling around paying customers should be criminal.
From what I've read, those higher numbers are including all deaths during the event, including those from flooding, as well as indirect deaths caused by car crashes and the like (just as hurricane death tolls will include people who die of carbon monoxide poisoning from running a generator in their tent two weeks after a storm has destroyed their home). I should have been more specific and said that I was referring to direct tornado deaths.

At any rate: one chaser death is needless, and therefore too many. But four? Seriously?
Member Since: Posts: Comments:
Quoting Andrebrooks:
Everyone look at this link.Link
Quoting wunderkidcayman:

help me out what should I see cause it not working on mine I think that would be my computers fault internet kinda slow and it stalls sometimes

never mind it up I see it yeah nah I hardly ever use that
Member Since: June 13, 2009 Posts: 2 Comments: 10852
Quoting Torito:
Dont know if this has been posted, but i tend to do this every day when it updates, and i diddnt today so far..



1. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A WEAK AREA OF LOW
PRESSURE OVER THE CENTRAL GULF OF MEXICO HAVE NOT BECOME ANY BETTER
ORGANIZED SINCE YESTERDAY. MOST OF THE SHOWER ACTIVITY IS STILL
LOCATED EAST AND SOUTHEAST OF THE LOW DUE TO STRONG UPPER-LEVEL
WINDS. CONDITIONS COULD BECOME A LITTLE MORE FAVORABLE FOR SLOW
DEVELOPMENT DURING THE NEXT DAY OR TWO...BEFORE THE LOW INTERACTS
WITH AN UPPER-LEVEL TROUGH. THIS SYSTEM HAS A MEDIUM CHANCE...30
PERCENT...OF BECOMING A SUBTROPICAL OR TROPICAL CYCLONE DURING THE
NEXT 48 HOURS AS IT DRIFTS GENERALLY NORTHWARD OR NORTH-
NORTHEASTWARD. REGARDLESS OF DEVELOPMENT...LOCALLY HEAVY RAINS ARE
LIKELY TO CONTINUE OVER THE NORTHEASTERN YUCATAN PENINSULA...
CENTRAL AND WESTERN CUBA...AS WELL AS THE FLORIDA KEYS AND THE
FLORIDA PENINSULA DURING THE NEXT SEVERAL DAYS.


Are you kidding? That was posted like three hours ago. In blog time, that's the equivalent of sometime last year. :-)
Member Since: October 2, 2004 Posts: 0 Comments: 12754
Quoting wunderkidcayman:

help me out what should I see cause it not working on mine I think that would be my computers fault internet kinda slow and it stalls sometimes
The 12z run still shows invest 91 L near Yucutan and with the convection,and even the winds are stronger.
Member Since: March 25, 2013 Posts: 29 Comments: 991
Quoting Tazmanian:
UPDATE: The US National Weather Service Norman Oklahoma has just upgraded the May 31 El Reno, Union City tornado to an EF-5, 2.6 mile-wide twister. It is now the largest tornado ever recorded.

The upgrade was based on information from a Dopler On Wheels (DOW) that measured low level winds of 296 miles per hour.



from here


Link


will need too wait from NWS too see if this ture or not


when was it 2.6 miles wide?

I know the velocity field was wide, but the tornado never seemed to have touched down for a long time, while that wide.

At least i havent seen a video of a 2.6mile wide tornado, just isolated wedge shots, and a lot of multiple vortices images and video.
Member Since: Posts: Comments:
Whatever form 91L takes over the next several days (whether invest-depression-low grade TS) it is packing quite a rain soaked punch.......Wind speed is the least of our worries with this one but major flooding will be for the Florida peninsula and other parts downstream.

A slow tropical soaker can be more dangerous than a fast moving TS or Cat 1.
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Quoting wunderkidcayman:


can you stop assuming that that is what I want because it not ok I'm not dreaming anything

yes loop is 5 day ago till now I'm looking between the 3 day till now


look at current maps never old
Member Since: Posts: Comments:
Quoting barbamz:
Thanks Dr. Masters for this impressive new blog. Really a pity that so many chasers were taken by a tragic surprise.


Rainfall amounts (in meters/liters resp. millimeters/milliliters) in the regions of the Alpes that caused the floodings in central Europe. Finally some metereological explanations are available on the Washington Post.
Quoting this article: "The village of Aschau, Bavaria recorded an impressive 405.1 mm of rainfall (15.9 inches) in just four days, of which 6.71" fell in 24 hours."


Sad to hear that news. Lived in Hallstadt and Bamberg a long time ago.
Member Since: August 24, 2010 Posts: 0 Comments: 671
Quoting Andrebrooks:
Everyone look at this link.Link

help me out what should I see cause it not working on mine I think that would be my computers fault internet kinda slow and it stalls sometimes
Member Since: June 13, 2009 Posts: 2 Comments: 10852
Quoting Neapolitan:
No, it's not; it's been varying between drizzling and sprinkling for the last four hours or so, but nothing I'd refer to as rain--and certainly not a soaking. What you see on the radar is between about 5 and 15 dBZ, That is: not much.


We have had heavier rain from our typical afternoon thunderstorms that is for sure.
Member Since: Posts: Comments:
Quoting Tazmanian:
UPDATE: The US National Weather Service Norman Oklahoma has just upgraded the May 31 El Reno, Union City tornado to an EF-5, 2.6 mile-wide twister. It is now the largest tornado ever recorded.

The upgrade was based on information from a Dopler On Wheels (DOW) that measured low level winds of 296 miles per hour.



from here


Link


will need too wait from NWS too see if this ture or not

Actually, the story said the "widest" tornado, not the largest. Given KFOR's accuracy so far, I'll wait for an official statement out of Norman before putting this in the record books.
Member Since: October 2, 2004 Posts: 0 Comments: 12754
Very, very, light sprinkles currently in Naples. I doubt we will get much more than 3-5 inches out of this storm. Currently we have had 1.25 since Sunday night in the golf course rain gauge. We shall see what tomorrow, and Thursday will bring, however.
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Quoting Torito:
Naples getting soaked right now.
No, it's not; it's been varying between drizzling and sprinkling for the last four hours or so, but nothing I'd refer to as rain--and certainly not a soaking. What you see on the radar is between about 5 and 15 dBZ, That is: not much.
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Quoting Neapolitan:
So of the eight lives confirmed lost in Friday's El Reno tornado, four were storm chasers. Half.

I suppose we can take comfort in the fact that there weren't more chasers killed, such as the three in Bette's vehicle, the two in the KFOR-TV truck, Sullivan and his two chase buddies, Chris Novy (the U-boat captain), and who knows how many others. But, still: four? In one storm?

I'd never say chasing needs to end--but I
do think it's high time some people started taking a good long look at their procedures and practices...

For some reason, the death toll is being reported as between 10 and 18, but that does not diminish your point. Being on the road in any storm is dangerous. Being on the road in the interests of science is dangerous but at least there's a higher motive. Being on the road during a storm to take videos as part of the media or in hopes of making money is a dangerous occupation. Being on the road in a storm just because you like to chase storms and see tornadoes is just plain foolish. Hauling around paying customers should be criminal.
Member Since: October 2, 2004 Posts: 0 Comments: 12754
Everyone look at this link.Link
Member Since: March 25, 2013 Posts: 29 Comments: 991
UPDATE: The US National Weather Service Norman Oklahoma has just upgraded the May 31 El Reno, Union City tornado to an EF-5, 2.6 mile-wide twister. It is now the largest tornado ever recorded.

The upgrade was based on information from a Dopler On Wheels (DOW) that measured low level winds of 296 miles per hour.



from here


Link


will need too wait from NWS too see if this ture or not
Member Since: May 21, 2006 Posts: 5091 Comments: 114649
Dont know if this has been posted, but i tend to do this every day when it updates, and i diddnt today so far..



1. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A WEAK AREA OF LOW
PRESSURE OVER THE CENTRAL GULF OF MEXICO HAVE NOT BECOME ANY BETTER
ORGANIZED SINCE YESTERDAY. MOST OF THE SHOWER ACTIVITY IS STILL
LOCATED EAST AND SOUTHEAST OF THE LOW DUE TO STRONG UPPER-LEVEL
WINDS. CONDITIONS COULD BECOME A LITTLE MORE FAVORABLE FOR SLOW
DEVELOPMENT DURING THE NEXT DAY OR TWO...BEFORE THE LOW INTERACTS
WITH AN UPPER-LEVEL TROUGH. THIS SYSTEM HAS A MEDIUM CHANCE...30
PERCENT...OF BECOMING A SUBTROPICAL OR TROPICAL CYCLONE DURING THE
NEXT 48 HOURS AS IT DRIFTS GENERALLY NORTHWARD OR NORTH-
NORTHEASTWARD. REGARDLESS OF DEVELOPMENT...LOCALLY HEAVY RAINS ARE
LIKELY TO CONTINUE OVER THE NORTHEASTERN YUCATAN PENINSULA...
CENTRAL AND WESTERN CUBA...AS WELL AS THE FLORIDA KEYS AND THE
FLORIDA PENINSULA DURING THE NEXT SEVERAL DAYS.

Member Since: Posts: Comments:

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