90L comes close to being the season's first named storm
The large extratropical storm (90L) that has been pounding Florida, the Bahamas, and Haiti this week with heavy rain and high surf has moved ashore over Mississippi. Last night and this morning, the storm put on an impressive burst of heavy thunderstorm activity and came close to becoming a subtropical or tropical depression. Winds at the Fort Morgan, AL station were 44 mph, gusting to 52 mph, and winds at Dauphin Island, Alabama coastal station were sustained at 39 mph, gusting to 48 mph at between 8am and 10am EDT this morning. While these winds were in excess of the 39 mph threshold of tropical storm force, both measurements were taken at elevations higher than the international wind measurement standard of ten meters, so the top measured winds of 90L were actually slightly less than tropical storm force. Had 90L spent another six hours over water, it very likely would have been declared a tropical/subtropical depression/storm.
The circulation around 90L continues to mean rain for Florida, but the rains will be lessening today. Rainfall amounts as high as 28 inches were measured this week in Northern Florida at Brunnell. Rainfall amounts of 2 - 3 inches have accumulated along the Alabama, Mississippi, and Florida Panhandle coasts from 90L so far (Figure 1).
Figure 1. Estimated rainfall from the Mobile, AL radar.
There are no other threat areas in the Atlantic to discuss today, so have a great weekend, and I'll have a new blog post by Tuesday.
Jeff Masters
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Very dangerous situation with now newly formed TS AILA (02B) everything is a place for a power cyclone fortunalty it looks like it may run out of realestate before intensifying futher. Lets hope
Most of it was shot in Jamaica, Caymans and Mexico. The last 3-4 images were SFL. Part 2 is not available, which included the remainder of SFL and Cuba
great video
-90 to -100C
Yes.
You're welcome, JFV.
A great wallpaper
Link
Thanks, Drak,
There is a little bit of mid-level turning at the very end of the stationary boundry attached to the low in the central ATL now that you mention it.
At 22N 67W
http://www.youtube.com/watch?v=oobBsoqroyc
Looking hard for genesis LOL!
I'll call it a frontal boundary associated with the long lived low in the central ATL. This boundary has been there for a week!
More like a surface trough of low pressure, a boundary nonetheless
The blocking index has been high a while between 50-0W, nothing really has been moving across that area for a while. Partly contributed to the genesis of 90L.
And that is why we are still getting rain.
Yea, the index is important as it signifies the temporal extent of any particular weather pattern.
Probably so. Heck, I would not have looked at all if not for the phase diagram from Drak. Thought I gave a good look to the GFS earlier today. Saw all those convective feedback dots and moved on. 18ZGFS a little stronger with a surface low and a bit of an inverted trough.
And that would be at the end of a 90L feeder. Maybe the GFS is gonna hit on the little zone of elongation between that and the end of the frontal boundary at 22N 67W? End of the boundary pulling east, the end of the feeder pulling NNW. Wham! ya gotta an area of low pressure.
Sorry for not answering I was on facebook talking with another meteorology major from my college about our local weather.
I believe that the end of the feeder band where the convection is trying to organize is where the low will form. (If one actually forms.)
...TROPICAL WAVES...
A TROPICAL WAVE IS ALONG 53W/54W S OF 17N MOVING W 15-20 KT.
RECENT SURFACE OBSERVATIONS SHOW WELL-DEFINED CYCLONIC
CURVATURE IN THE LOW LEVEL WINDS AROUND THIS WAVE. THIS WAVE IS
ASSOCIATED WITH A MAXIMUM IN DEEP LAYER MOISTURE BASED ON TOTAL
PRECIPITABLE WATER PRODUCT FROM CIMSS. SOUTHEASTERLY LOW LEVEL
FLOW BETWEEN THE TROPICAL WAVE AND A SURFACE TROUGH FARTHER
NORTH APPEAR TO BE ADVECTING CYCLONIC VORTICITY ASSOCIATED WITH
THIS WAVE NORTHWARD. AS A RESULT...THE WAVE HAS BEEN EXTENDED
NORTHWARD TO 17N...CONSISTENT WITH THE NORTHWARD EXTENSION IN
DEEP LAYER MOISTURE. SCATTERED MODERATE CONVECTION IS OCCURRING
WITHIN 180 NM EITHER SIDE OF THE WAVE AXIS S OF 6N...INCLUDING
PORTIONS OF SURINAME...FRENCH GUIANA...AND NE BRAZIL. FARTHER TO
THE NORTH...DEEP CONVECTION IN THE VICINITY OF THIS WAVE IS
BEING SUPPRESSED BY SUBSIDENCE ASSOCIATED WITH A SURFACE RIDGE
OVER THE E ATLC. HOWEVER...SCATTERED SHOWERS ARE OCCURRING
WITHIN 90 NM EITHER SIDE OF THE WAVE AXIS FROM 6N-17N.
Looks like pottery may have a slight chance of some precipitation after all. . .
True. That '29 cane was a "out of nowhere" turn-back typhoon. Only one or two other storms were noted that year.
LOL so there won't be another outburst I'll go a head and tell you I'm going to get dinner bbl. LOL
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