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TC Freddy - will it become the longest tracked storm?

Posted: Sun 05/03/2023 12:19
by BeaconHill
Noted this on Twitter saying Freddy has drifted back out to sea and sprung back into action…
56706276-BF76-4BD1-BD9D-93F5CA280579.jpeg
Apparently “John” in 1994 lasted 31 days. Not quite sure on the duration of Freddy, but comments say it is getting close to that record.

Re: TC Freddy - will it become the longest tracked storm?

Posted: Sun 05/03/2023 15:10
by darcyplumb
BeaconHill wrote: Sun 05/03/2023 12:19 Noted this on Twitter saying Freddy has drifted back out to sea and sprung back into action…

56706276-BF76-4BD1-BD9D-93F5CA280579.jpeg

Apparently “John” in 1994 lasted 31 days. Not quite sure on the duration of Freddy, but comments say it is getting close to that record.
I believe Freddy is now at Day 29.

Re: TC Freddy - will it become the longest tracked storm?

Posted: Sun 05/03/2023 21:25
by Nev
Freddy hasn't been a TC for all of that time though.

TC Freddy was named by the BoM on Feb O6, traversed the Indian Ocean as a Cat 5 before crossing Madagascar and making landfall again in Mozambique on Feb 25, where it rapidly weakened and was reclassified as an overland depression, with max winds dropping below TC strength by Feb 28. It then re-entered the Mozambique Channel on Mar 03 and regained TC strength yesterday on Mar 04.

Freddy is, however, now the longest-lived TC in the Southern Hemisphere, beating TC Leon-Eline's record of 18 and half days in Feb 2000.

Re: TC Freddy - will it become the longest tracked storm?

Posted: Mon 06/03/2023 15:43
by Nev
One or two other records of note:

TC Freddy also holds the Southern Hemisphere record for all-time accumulated cyclone energy (ACE), a measure of the storm’s strength over time. It generated about 66 units of ACE, beating the previous record of 53 units formerly held by TC Fantala in 2016. Only two Atlantic hurricanes have had a higher lifetime ACE index than Freddy - Hurricane Three in 1899 (ACE: 73.6) and Hurricane Ivan in 2004 (ACE: 70.4).

Freddy was the first TC in the Southern Hemisphere to undergo four separate rounds of rapid intensification, which occurred due to repeated bursts of wind shear that weakened the storm and then subsided.

Freddy was one of only four systems to traverse the entirety of the southern Indian Ocean from east to west; the others were TC's Litanne in 1994 and Leon–Eline and Hudah in 2000.

Ref: 'Tropical Cyclone Freddy Breaks Records before Lashing Madagascar' - NOAA

Re: TC Freddy - will it become the longest tracked storm?

Posted: Mon 06/03/2023 16:13
by harleyb
That's amazing! I had forgotten about Freddy and am amazed that he still exists and is re-intensifying yet again. Surely the next landfall will be the last... or will it?
image.png

Re: TC Freddy - will it become the longest tracked storm?

Posted: Wed 08/03/2023 11:20
by harleyb

Re: TC Freddy - will it become the longest tracked storm?

Posted: Wed 08/03/2023 12:55
by Nev
I'll be interested to see if the WMO counts the 7 days or so that Freddy fell below TC strength while overland in Mozambique, particularly as Hurricane/Typhoon John never lost TC strength throughout its entire 31 days in the north Pacific.

Freddy is currently the equivalent of a high-end Cat 3 TC on the BoM Scale.

Re: TC Freddy - will it become the longest tracked storm?

Posted: Thu 09/03/2023 16:18
by Nev
After a burst of rapid intensification yesterday, TC Freddy has once again rapidly weakened under stubborn mid-level shear and dry air intrusion (currently Cat 2). This weakening trend could continue over the next 12 hours, before a possible resumption of intensification after 24 hours as Freddy approaches the coast of Mozambique.

Re: TC Freddy - will it become the longest tracked storm?

Posted: Fri 10/03/2023 16:14
by Nev
Freddy's track has slowed somewhat as it encounters more favourable conditions, allowing more time to reintensify before it makes landfall (if at all), which might not be until Sunday... Models are very divided on track and speed, with GFS consistently bringing Freddy back into Mozambique Channel not long after landfall.

JTWC notes that, "Freddy is like a B-reel horror movie that never ends... it may not stay over land for long"...

Re: TC Freddy - will it become the longest tracked storm?

Posted: Sat 11/03/2023 15:32
by Nev
Snippet from the WMO's latest Press Release this afternoon:
'Tropical Cyclone Freddy may set new record' - WMO

... "The WMO Weather and Climate Extremes Archive are currently assembling a blue-ribbon international committee of scientists. Once the tropical cyclone has dissipated, these experts will begin a detailed examination of the raw data to determine if Freddy has indeed established a record as the longest-duration tropical cyclone on record. One question that we will be addressing is the fact that throughout its long lifetime, the storm has periodically weakened below tropical storm status. We will obviously need to address if that is a concern in our evaluation," said Prof. Randall Cerveny, WMO Weather and Climate Extremes rapporteur. "Our evaluations are detailed scientific inquiries so they do take time," he said. ...
Freddy's centre is now less than 100km from the Mozambique coast as it continues to strengthen (currently the equivalent of a mid Cat 3 TC) and moves slowly towards the Zambezi province, where it is expected to make landfall probably near Quelimane in the next 12 to 24 hours...

Re: TC Freddy - will it become the longest tracked storm?

Posted: Sun 12/03/2023 08:19
by Nev
Freddy made landfall on the Mozambique coast near the town Quelimane at 5:15am NZDT this morning (11 1615z), with 10 minute max winds of 85 knots (155 km/h), gusting to 120 knots (220 km/h). Some of yesterday's 0000z main model runs show Freddy eventually doing a U-turn back into the Mozambique Channel, while others have him dissipating further inland...

Re: TC Freddy - will it become the longest tracked storm?

Posted: Tue 14/03/2023 11:29
by Razor
Looks like freddy has finally met his inland graveyard. What a journey!
image.png

Re: TC Freddy - will it become the longest tracked storm?

Posted: Tue 14/03/2023 15:05
by BeaconHill
Stumbled across this on Twitter. Nice summary!
071EA53B-61B4-41CB-B1DC-40D10E302AEF.jpeg

Re: TC Freddy - will it become the longest tracked storm?

Posted: Tue 14/03/2023 15:50
by Nev
Yes, Freddy fell below TC strength early on Sunday morning NZDT and has continued to weaken.
Even if Freddy did head back offshore, conditions there no longer look favourable for any redevelopment...

Note that (as mentioned) RSMC La Reunion had landfall at 11 1615z, while JTWC had it slightly later at 11 1800z (Saturday morning NZDT).
So for posterity, below is also the 1800z sat-pic showing a somewhat tighter pinhole eye at landfall.

Re: TC Freddy - will it become the longest tracked storm?

Posted: Sun 19/03/2023 08:35
by Nev
I've put together this wind speed graph showing both 10-minute max winds and 1-minute max winds (note that 1-minute winds are generally about 14% higher than 10-minute winds). The background TC categories are based on the Australian scale.

Also note the drops in intensity to below TC strength after Freddy made its first landfall on the island of Madagascar as a high-end Cat 3 TC on Feb 21 1500z, its second landfall on the coast of Mozambique as a mid Cat 2 TC on Feb 24 1200z and its third landfall again on the coast of Mozambique as a high-end Cat 3 TC on Mar 11 1800z.

TC Freddy Wind Speeds.png