Now that is a warm eddy: Buoy 42058 went up to 85.6F

[drezee]

Hasn't seen over 83 and then this!!!

http://www.ndbc.noaa.gov/station_page.php?station=42058

[x-y-no]

Hasn't seen over 83 and then this!!!

http://www.ndbc.noaa.gov/station_page.php?station=42058

Winds dropped from 15 knots to less than 4 knots. That probably accounts for most of the temperature rise.

Pretty impressive spike, though.

[SouthFloridawx]

At 1850 GMT it reported at temp of 85.5 degrees.

04 13 1850 NNE 3.9 5.8 - - - - 29.81 -0.06 80.1 85.5 - - -

[joseph01]

Wow! Great observation. Hurricane season 2006 really seems to be revving it's engine. We'll see if the run is as impressive.

[senorpepr]

FYI, S2K has a buoy page in connection with the NDBC...

http://tropicalupdates.nhcwx.com/buoy.htm

[benny]

Hasn't seen over 83 and then this!!!

http://www.ndbc.noaa.gov/station_page.php?station=42058

Winds dropped from 15 knots to less than 4 knots. That probably accounts for most of the temperature rise.

Pretty impressive spike, though.

He is exactly right.. it is just the lack of wind and not some true temperature rise. It is best to measure SST right before the sun comes up to get a good measure. After the winds increase a bit we'll see how much heat is retained.. usually a little is..

[windycity]

its not beached?

[drezee]

Hasn't seen over 83 and then this!!!

http://www.ndbc.noaa.gov/station_page.php?station=42058

Winds dropped from 15 knots to less than 4 knots. That probably accounts for most of the temperature rise.

Pretty impressive spike, though.

He is exactly right.. it is just the lack of wind and not some true temperature rise. It is best to measure SST right before the sun comes up to get a good measure. After the winds increase a bit we'll see how much heat is retained.. usually a little is..

Sorry he is not right.... The wind was never 15 knots during this increase. It happen over a 4 hour period. The winds haven't been 15 knots for two days. This was the result of a warm eddy. Wind slowing down over a two days period doesn't justify a 4.5C in just 4 hours. It never can and it never will. thw change in wind may have helped the eddy move, but that would be it...

[benny]

nope.. just hanging out in the central caribbean. it's position hasn't changed. it can change a whole lot when the sun is overhead and the wind is light. but it isn't "real" per se...

[SouthFloridawx]

04 13 2350 N 5.8 7.8 - - - - 29.80 +0.04 79.9 82.9

It is cooling, I will be interested to see what the temp is in the morning before the sun comes up.

[spinfan4eva]

Hmmm, Maybe somebody swam by the buoy and had to pee so it affected the temperature

[Cookiely]

:idea: Hmmm, Maybe somebody swam by the buoy and had to pee so it affected the temperature

Must have been a whale!

[windycity]

HA! Thats a good one.!!!

[x-y-no]

Hasn't seen over 83 and then this!!!

http://www.ndbc.noaa.gov/station_page.php?station=42058

Winds dropped from 15 knots to less than 4 knots. That probably accounts for most of the temperature rise.

Pretty impressive spike, though.

He is exactly right.. it is just the lack of wind and not some true temperature rise. It is best to measure SST right before the sun comes up to get a good measure. After the winds increase a bit we'll see how much heat is retained.. usually a little is..

Sorry he is not right.... The wind was never 15 knots during this increase. It happen over a 4 hour period. The winds haven't been 15 knots for two days. This was the result of a warm eddy. Wind slowing down over a two days period doesn't justify a 4.5C in just 4 hours. It never can and it never will. thw change in wind may have helped the eddy move, but that would be it...

Wind:



Temperature:




The wind started dropping significantly on the morning of the 12th, and the temperature started rising that same day. There was a period of cooling overnight on the 13th (I haven't checked, but I'm guessing radiative cooling + enhanced evaporation due to low RH) and warming continued dramatically the next day as winds stayed below 4 knots.

I don't know what you think, but it looks like a pretty solid correlation to me.

Only point I'd add is that the skies have been very clear there the last couple of days, which contributes to greater diurnal variation.

[x-y-no]

One other point regarding the hypothesis that this was a warm eddy:

The Caribbean current is pretty broad and slow in the region where 42058 is located. It's pretty hard to see how a feature small enough to propagate past the bouy in such a short period of time could have formed in the middle of a deep basin in the absence of a very strong sharply bounded current.


-------

EDIT:



(from Surface Currents in the Caribbean Sea)

[drezee]

Hasn't seen over 83 and then this!!!

http://www.ndbc.noaa.gov/station_page.php?station=42058

Winds dropped from 15 knots to less than 4 knots. That probably accounts for most of the temperature rise.

Pretty impressive spike, though.

He is exactly right.. it is just the lack of wind and not some true temperature rise. It is best to measure SST right before the sun comes up to get a good measure. After the winds increase a bit we'll see how much heat is retained.. usually a little is..

Sorry he is not right.... The wind was never 15 knots during this increase. It happen over a 4 hour period. The winds haven't been 15 knots for two days. This was the result of a warm eddy. Wind slowing down over a two days period doesn't justify a 4.5C in just 4 hours. It never can and it never will. thw change in wind may have helped the eddy move, but that would be it...

Wind:



Temperature:




The wind started dropping significantly on the morning of the 12th, and the temperature started rising that same day. There was a period of cooling overnight on the 13th (I haven't checked, but I'm guessing radiative cooling + enhanced evaporation due to low RH) and warming continued dramatically the next day as winds stayed below 4 knots.

I don't know what you think, but it looks like a pretty solid correlation to me.

Only point I'd add is that the skies have been very clear there the last couple of days, which contributes to greater diurnal variation.

Today the wind is still hanging around 1.9 and 5.9 kts...where is the spike?

[HurricaneHunter914]

Hmmm, Maybe somebody swam by the buoy and had to pee so it affected the temperature

[benny]

http://www.ndbc.noaa.gov/station_page.php?station=42058

Not as large of a spike today but still 3F-4F daily range is definitely solar-based and not some sort of eddy. too timed w/solar heating. but you can see it in the gulf of mexico sometimes.. but you have to pay attention to when one of the warm core eddies gets close to a buoy in the winter.

[JonathanBelles]

how do u guys keep all of your bouys straight?
are there certain bouys you look at?

[skysummit]

how do u guys keep all of your bouys straight?
are there certain bouys you look at?

You could try to tie sandbags in an equal distant from one another all the way around the bottom of the buoy. They still won't stay that straight though because of the wave action.