A rare triple threat: three simultaneous Atlantic hurricanes
For the first time in twelve years, we have a rare triple threat in the Atlantic--three simultaneous hurricanes. Hurricane Karl joined Hurricanes Igor and Julia in the steadily expanding Hurricanes of 2010 club this morning, becoming the sixth hurricane of the season. The last time we had three simultaneous hurricanes in the Atlantic was in 1998. That year also had four simultaneous hurricanes--Georges, Ivan, Jeanne and Karl--for a brief time on September 25. There has been just one other case of four simultaneous Atlantic hurricanes, on August 22, 1893. According to Phil Klotzbach at Colorado State, three simultaneous Atlantic hurricanes is a rare phenomena, having occurred only eight other times since 1851. The other years were 1893, 1926, 1950, 1961, 1967, 1980, 1995, and 1998.

Figure 1. Triple trouble: From left to right, Hurricanes Karl, Igor, and Julia roil the Atlantic. Image credit: NASA/GSFC.
Karl
Hurricane Karl continues to intensify. The latest Hurricane Hunter flight, flying at 12,000 feet, found flight level winds of 95 mph. This suggests surface winds of 85 mph, though the top surface winds seen by their SFMR instrument were about 80 mph. Mexican radar out of Alvarado shows the outer spirals bands of Karl are dumping heavy rains on the Mexican coast along the Bay of Campeche.

Figure 2. Afternoon radar image from the Alvarado, Mexico radar. The eye of Karl is visible in the upper right, and rain bands are affecting the coast to the east of the radar site. Image credit: Mexican Weather Service..
Forecast for Karl
Conditions for intensification are ideal in the Gulf of Mexico's Bay of Campeche, with wind shear expected to be low, 5 - 10 knots, SSTs warm, 29°C - 30°C, and the atmosphere very moist. These conditions, combined with the topography of the surrounding coast which tends to enhance counter-clockwise flow, should allow Karl to intensify into Category 2 hurricane before making landfall between Tampico and Vercruz, Mexico Friday afternoon. Karl is a small storm, and is unlikely to bring any rain or wind to Texas.
Igor
The Air Force Hurricane Hunters made their first foray into Hurricane Igor this afternoon, and found a high-end Category 3 storm, with a central pressure of 940 mb and top winds at 10,000 feet of 150 mph. The southwest portion of the eyewall was open, so Igor has the potential to intensify once again if it can close off the gap. There are no major changes to the track or intensify forecast for Igor in the latest set of model runs. Igor is expected to remain a major hurricane for the next two days, and is headed northwest at 7 mph. This motion will carry the core of the hurricane close to NOAA buoy 41044 between 9 - 11 pm EDT tonight. Top winds at the buoy so far today have been 65 mph, gusting to 81 mph, with a significant wave height of 38 feet (the significant wave height is the average of the highest 1/3 of the waves.)
Elsewhere in the tropics
The ECMWF model develops a new tropical depression a few hundred miles off the coast of Africa 2 - 4 days from now. The GFS is suggesting the eastern Caribbean could see a tropical depression 6 - 7 days from now.
I'll have an update Friday morning.
Jeff Masters
Reader Comments
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from its previous heading of dueWest
H.Karl's average speed moving between its last 2 reported positions was ~9mph(~14.5km/h)
15Sep 09pmGMT - - 19.0n89.4w - - 45mph - - - 997mb - - NHC.Adv.#5
16Sep 12amGMT - - 19.2n90.1w - - 40mph - - 1000mb - - #5A
16Sep 03amGMT - - 19.4n90.7w - - 40mph - - 1000mb - - #6
16Sep 06amGMT - - 19.7n91.2w - - 40mph - - 1000mb - - #6A
16Sep 09amGMT - - 19.8n91.6w - - 50mph - - 1000mb - - #7
16Sep 12pmGMT - - 19.6n92.1w - - 65mph - - - 986mb - - ???
??? 12:30pmGMT - - 19.7n92.2w - - 65mph - - - 987mb - - #8
16Sep 03pmGMT - - 19.7n92.8w - - 75mph - - - 983mb - - #9
16Sep 06pmGMT - - 19.7n93.3w - - 75mph - - - 983mb - - #9A
15Sep 09pmGMT - - 19.6n93.7w - - 80mph - - - 977mb - - #10
Copy &paste 19.0n89.4w, 19.2n90.1w, 19.4n90.7w, 19.7n91.2w, 19.8n91.6w-19.7n92.2w, 19.7n92.2w-19.7n92.8w, 19.7n92.8w-19.7n93.3w, 19.7n93.3w-19.6n93.7w, tam, ver, cun, 19.6n93.7w-19.02n95.97w into the GreatCircleMapper for a look at the last 12*hours.
Using straightline projection upon the speed&heading averaged
over the 3hours spanning the last two reported positions:
~17hours from now to AntonLizardo,Veracruz,Mexico
southeast of Boca del Rio
* The westernmost line-segment is the straightline projection.
Since 1998, only 3 seasons have the EPAC had more named storms than the Atlantic.
2000, 2006 and 2009 (a few seasons were tied, though).
there breaking up
You are correct.......That is from the NOAA page after the 98 season and it was not updated after that year...........
Yes, I agree with you. Gradually, we are finally beginning to see a shift in the pattern.
Yeah, Igor is a behemoth!
I agree... Seasons are like fingerprints, each one is unique in its own way.
Long live the
See everyone this evening.
In terms of gale force diameter, Faith I believe (not too surprising, as TCs typically get bigger as they get higher in latitude... and you can't get much higher than Faith while still being tropical).
One thing interesting to note: September 1995 had only three named storms, while September 2005 had five.
last run was NOLA, 18z should be coming out over the next hour.
Julia is racing to the wnw at 25mph
Yep, and we're already at 5 named storms for this month (Gaston, Hermine, Igor, Julia, Karl)
0Z and 6Z GFS shows Florida as the target
12Z takes the system to LA/MS
However the statement is still technically correct. "Mitch was". Its probably a good thing that Karl continues to shift southward, gives him much less time to get his act together. Igor has really expanded hasn't he. The way he did that is as impressive as his original bout of strengthening to me. At least the blog has slowed for the time being, even if it is only because no storms are threatening the US coast.
Not saying it will blow up that fast, but the small size and great atmospheric conditions may lead to rapid intensification before landfall tonight.
1 Faith 1966
2 Gabrielle 1989
3 Igor 2010
4 Unnamed 1971
5 Gilbert 1988
6 Isabel 2003
7 Doris 1975
8 Ella 1978
9 Debby 1982
10 Esther 1961
Coming right at me!!!!
Second time this year though there was no tornado the first time.
20 storms + the way thing are going
thats Igor
Still sticking to 16-17.
The rate of activity will eventually begin to slow down. Possibly after Karl (or Lisa if the models are right), there might be a bit of a lull for a week or two (every season has a lull - just varies how long and what consists of that lull - one storm alone would be a lull compared to the activity of the last 3 weeks).
The 12z had it in Nolaq. Not pulling your leg. But that is almost a good thing as that track will jump around a lot in the next 330hrs.
It's hard to hit that tiny + on the Droid...
Umm, RUN!!!!! :-P
I guess something went A LITTLE wrong when making this map...
forecast models have been showing Lisa and Matthew in the next 6-10 days; "Matthew" lasts until the first week of October. I doubt there will be a lull, maybe after that one
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