Tropics August 31, 2020-onward
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Started by metmike - Aug. 31, 2020, 11:41 p.m.

Active Storms | Marine Forecas

By metmike - Aug. 31, 2020, 11:42 p.m.
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Previous thread on the tropics/Laura:

This includes numerous graphics and  information about hurricanes.

                Tropics August 17, 2020    

By metmike - Aug. 31, 2020, 11:49 p.m.
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Tropical Depression Fifteen Forms Off North Carolina Coast; Forecast to Become Tropical Storm Nana, But No Threat to U.S


Entering the Peak of Hurricane Season

September is the peak month of hurricane season, and the most active day of the year is around Sept. 10, on average. 

Colorado State University tropical scientist Phil Klotzbach said that roughly three-quarters of Atlantic hurricane seasons since 1966 have had at least one active named storm on Sept. 10. Also, half of all seasons have had at least one active hurricane on this date.

This doesn't guarantee every Sept. 10 will have a rash of Atlantic named storms. 

There's an overlap of favorable factors in early-mid September, including ocean water reaching its highest temperature, the atmosphere's ability to generate thunderstorms hitting its peak, hostile shearing winds declining to a minimum and a parade of disturbances known as tropical waves acting as seeds for development that, while peaking in July, are numerous in September.

By metmike - Aug. 31, 2020, 11:52 p.m.
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Other Areas to Watch

We're also currently watching two other disturbances in the Atlantic for possible tropical development as we move into the peak month of hurricane season. 

Areas to Watch(The potential area(s) of tropical development according to the latest National Hurricane Center outlook are shown by polygons, color-coded by the chance of development over the next five days. An "X" indicates the location of a current disturbance. )

1. Caribbean Tropical Wave

A broad area of low pressure located in the central Caribbean is also being tracked by the NHC.

This system is moving quickly westward through the Caribbean and is producing numerous showers and thunderstorms. Conditions are forecast to be conducive for this system to gradually organize, and a tropical depression could develop in the next couple of days.

Regardless of development, this system will track toward Central America and Yucatan later this week. Areas from Jamaica to Honduras, Belize, Guatemala and the Yucatan should monitor the progress of this disturbance, according to the NHC.

2. Eastern Atlantic Tropical Wave

The NHC is also watching a tropical wave that will emerge into the far eastern Atlantic from Africa in the next day or two.

It's too early to know whether this system will eventually grow into a tropical depression or storm. We are also too far out in time to know whether it might affect land areas in the future.

By metmike - Sept. 1, 2020, 1 a.m.
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This may seem surprising but only 11 observed Category 5 hurricanes in the Gulf of Mexico in the last Century+ Why don't more hurricanes become (or stay) Cat 5 once in the very warm Gulf of Mexico?  There really is no shortage of tropical storms or minimal hurricanes each season


List of Gulf of Mexico hurricanes at Category 5 -- while in the Gulf of Mexico is not very long: 

Cuba Hurricane (1924

 Labor Day (1935) 

Carla (1961) 

Beulah (1967)

 Camille (1969) 

Anita (1977)

 Allen (1980)

 Ivan (2004) 

Katrina (2005) 

Rita (2005) 

Michael (2018)

By metmike - Sept. 1, 2020, 1:08 a.m.
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This developing Caribbean system will be competing with the newly-formed tropical depression off the East Coast of the United States to become the next named system of the 2020 hurricane season:

By metmike - Sept. 3, 2020, 1:50 a.m.
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Getting a bit more active but no immediate threats.

Possibly the wave off the coast of Africa right now, might strengthen in the Central Atlantic early next week.

By metmike - Sept. 4, 2020, 3:55 p.m.
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80% chance of a tropical depression in the Central Atlantic next week.

By metmike - Sept. 6, 2020, 6:33 p.m.
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90% chance of a tropical depression in the next day in the Central Atlantic.

It does not appear to be a threat to any of the US, nor is there a threat from any other systems. 

We are approaching the peak seasonal time frame for tropical activity. 

Here in the most active early season so far, its looks relatively quiet.

An area of low pressure located about midway between the west coast of Africa and the Leeward Islands is gradually becoming better defined.  However, the associated showers and thunderstorms are still not well organized.  Gradual development of this system is expected, and a tropical depression is likely to form tonight or on Monday while it moves westward or west-northwestward across the central tropical Atlantic. * Formation chance through 48 hours...high...90 percent. * Formation chance through 5 days...high...90 percent.
By metmike - Sept. 6, 2020, 6:48 p.m.
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This will be TS Paullette and be the earliest P named storm since we started assigning names to Tropical Storms.

This was the previous record earliest P name. 

16PhilippeSeptember 17, 2005

Another system with potential is even farther east, just off the coast of Africa right now that has a good chance to become Rene later this week. Like Paullette, it will likely stay in the Central Atlantic and not threaten the US because of the upper level flow right now.

This would be the earliest R named storm. You might remember this one, that came after Katrina in the GOM 15 years ago.

17RitaSeptember 18, 2005
By metmike - Sept. 7, 2020, 12:24 p.m.
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          As expected,  we have TS Paulette. No threat to the US.


cone graphic 

By metmike - Sept. 7, 2020, 12:28 p.m.
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The next Rene will be much stronger but also is no threat to the US  as it stays in the Central Atlantic.


cone graphic 

By metmike - Sept. 10, 2020, 2:01 p.m.
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New disturbance in the far Southeast Atlantic will likely become Sally this weekend.

Previous record for the S letter storm  #18  was Stan on October 2, 2005, so we continue on a path to obliterate the record for named storms set in 2005.

There were 28 storms that year.

We are almost at the halfway point in the tropical weather season.

No threats to the US right now.

By metmike - Sept. 12, 2020, 10:13 p.m.
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We have our Sally but it's NOT the system that I thought would be Sally.......and it IS a threat to the US.

Sally is just barely a tropical storm and predicted to hit around New Orleans on Tuesday as a minimal hurricane.

cone graphic

80+ deg. is the temp we want to see to sustain a hurricane.  Looks like there are some spots in the W.GOM right now that are in the U-80's!

But not quite as warm in the E. GOM, with green colors and mid 80's,  where Sally will be tracking so this lessens the chance of explosive/rapid development  a bit but plenty warm enough.

30 deg. C is 86 deg. F.




By metmike - Sept. 12, 2020, 10:25 p.m.
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The next system after this will be named Teddy( I was guessing that this one would be Sally) and break the record for the earliest named T storm, that right now, stands as Tammy on October 5, 2005.

Future Teddy is way out in the Southeast Atlantic and will likely become a hurricane next week but be no threat to the US.

Right behind Teddy, will be Vicky. Around 60% chance of Vicky in the next 5 days, with no threat to the US. 

The earliest name V storm in history was Vince in 2005 on October 9, 2005.

Vicky  will be storm #21 for this Atlantic hurricane season.............which is just now passing the halfway point.

The record number of named tropical storms was 28 set in 2005. This record will be obliterated!!!

By metmike - Sept. 12, 2020, 10:26 p.m.
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See for yourself!

List of Atlantic hurricane records

  Indicates a tie for the earliest/next earliest formation date

 Based on data from: U.S. NOAA Coastal Service Center - Historical Hurricane
NameDate of formationNameDate of formation
Storm #EarliestNext earliest
Earliest formation of north Atlantic tropical cyclones by storm number
1UnnamedJanuary 3, 1938UnnamedJanuary 4, 1951
2UnnamedMay 17, 1887UnnamedMay 26, 1908
BerylMay 26, 2012
3CristobalJune 2, 2020ColinJune 5, 2016
4DanielleJune 20, 2016DebbyJune 23, 2012 (12z)
5EdouardJuly 6, 2020EmilyJuly 11, 2005
6FayJuly 9, 2020FranklinJuly 21, 2005
7GonzaloJuly 22, 2020GertJuly 24, 2005
8HannaJuly 24, 2020HarveyAugust 3, 2005
9IsaiasJuly 30, 2020IreneAugust 7, 2005
10JosephineAugust 13, 2020JoseAugust 22, 2005
11KyleAugust 14, 2020KatrinaAugust 24, 2005
12LuisAugust 29, 1995LeslieAugust 30, 2012
13MariaSeptember 2, 2005MichaelSeptember 4, 2012
LeeSeptember 2, 2011
14NateSeptember 5, 2005MariaSeptember 7, 2011
15OpheliaSeptember 7, 2005 (06z)UnnamedSeptember 19, 1936
16PhilippeSeptember 17, 2005OpheliaSeptember 21, 2011
17RitaSeptember 18, 2005PhilippeSeptember 24, 2011
18StanOctober 2, 2005SebastienOctober 21, 1995
19UnnamedOctober 4, 2005TonyOctober 24, 2012
20TammyOctober 5, 2005UnnamedNovember 15, 1933
21VinceOctober 9, 2005N/A
22WilmaOctober 17, 2005N/A
23AlphaOctober 22, 2005N/A
24BetaOctober 27, 2005N/A
25GammaNovember 18, 2005N/A
26DeltaNovember 23, 2005N/A
27EpsilonNovember 29, 2005N/A
28ZetaDecember 30, 2005N/A


By metmike - Sept. 13, 2020, 12:04 p.m.
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Forecast for Sally not much changed, just a tad to the left of the previous forecast. 

Speeding up initially, so hitting LA early Tuesday. Then slowing down, so heavy rains a big threat.

Forecast to be a minimal hurricane still.

7 Day Total precipitation below:




By metmike - Sept. 13, 2020, 6:10 p.m.
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Not alot of change. Hurricane, early Tuesday along the LA coast.

This will cause some shut in production for the energy industry. 

Unlike Laura that was a huge wind maker and moved so fast that rains were not a problem, Sally will not have as much wind but will slow down, so that rains over a foot along and just north of the coast will be the main issue.

By metmike - Sept. 14, 2020, 12:56 p.m.
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Track of Sally is slightly farther to the right now and slightly longer to make landfall .........late Tuesday, with a bit of an increase in to 105 mph which is solidly in cat. 2.

Areas hit the hardest will be from far Southeastern LA to MS/AL/far west FL panhandle.

By metmike - Sept. 14, 2020, 1:04 p.m.
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We also have Vicky and Teddy as expected.  New records for the earliest V and T named storms.  Up to 21 named storms in the Atlantic basin and just past the halfway point climatologically.  No threat to the US.

Vicky will fizzle but Teddy could become a major hurricane in the Central Atlantic........with no  threat to land.

By metmike - Sept. 14, 2020, 7:13 p.m.
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Updated forecast for Sally are to 110 mph on Tuesday which is the bottom of a cat. 3 major hurricane.

Landfall looks like around the MS coast very late Tuesday.

Areas to the right of the hurricane, as always get the worst of it because the speed of the storm adds to the winds circulating around it. 

By metmike - Sept. 15, 2020, 12:37 p.m.
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Sally has shifted slightly farther to the right and is a minimal hurricane with no threat to get much stronger between now and landfall early Wednesday.

Winds will NOT be the main issue, though they will be very strong along the coast. The slow movement and "dirty" right side amplification of weather elements means that Alabama to the far west Florida Panhandle coast will get the most rain, which is the biggest threat............over a foot of rain possible, especially around the Mobile Bay of AL:

[Image of WPC QPF U.S. rainfall potential]


No changes to the rest of the tropics except to add our latest potential new system, that may become Wilfred in several days.

This will be the earliest W name, replacing Wilma from October 17, 2005. Wilma was a whopper in the E.Gulf and Florida Peninsula and that name was retired.


September 16, 2020

Sally is rapidly weakening at 3pm central and will be a tropical storm shortly. Also picking up speed a bit. So the rains will not be as long lasting in new locations.

Sally will be absorbed by a frontal boundary in the Southeast US later this week.

2 new tropical systems could be named in the next several days.

They will have the names Wilfred and Alpha.

Yeah, that's right, we will run out of names and start using the letters in the Greek alphabet.

I will guess that we could have another 10 storms.

By metmike - Sept. 15, 2020, 12:45 p.m.
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I will leave this as the last page for the rest of the week and make updates above it to make it easy to track this system below:

We will be able to track hurricane Sally, then the remnants for the rest of the week with the graphics below that will be updated automatically/constantly during this period.

Southern Mississippi Valley sector loop
Go to: Most Recent Image




By metmike - Sept. 17, 2020, 1:22 p.m.
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So long Sally..........hello Wilfred(the next named storm and last before we go to the Greek letters)

Tropical disturbance in Gulf of Mexico

By metmike - Sept. 18, 2020, 2:46 p.m.
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We got the W named storm from the one in the  Southeast Atlantic. Wilfred is not threat to land.

However, the next named storm in the southwest GOM will have some affect on the US. This one will be called Alpha after it develops and could become a weak hurricane, while meandering around in the far western GOM.

[Key Messages]


The graphics below will allow us to monitor Alpha, after it develops, then  over the next week.

South Plains sector loop
Go to: Most Recent Image