Cloud Stalker: Subtropical Storm LAURA

Monday, September 29, 2008

Subtropical Storm LAURA

Laura is expected to remain over 25c-26c SSTs for the next 24 hours
and also be under light to moderate shear conditions. Therefore...
some additional strengthening is forecast. However...if the current
trend of convection wrapping around the center continues...then
subtropical storm Laura could quickly transition over to a tropical
cyclone and become a hurricane with a banding eye feature later
today. By 36 hours...Laura is expected to be moving over much
cooler water...which should induce weakening along with a gradual
transition to extratropical status.-forecaster Stewart-

Kyle is considered to be extratropical, so besides Laura there is no activity going on in the Atlantic. All is calm again for the moment.
I thought we would see some rain today but it looks like it will remain south of the Tampa bay. DEEP MOISTURE WILL DRIFT NORTH AS A WAVE OF LOW PRESSURE DEVELOPS
AND MOVES ALONG A BOUNDARY LOCATED ACROSS SOUTHERN PORTIONS OF THE
AREA TONIGHT INTO TUESDAY. THIS WILL LEAD TO NUMEROUS SHOWERS AND
THUNDERSTORMS FROM THE TAMPA BAY REGION SOUTH AND EAST. We could see some SCATTERED thunderstorms later this evening but for us on the coast it is a wait and see. I am bummed. I haven't seen a decent storm in quite awhile. I bet there will be a nice sunset tonight, but for the past couple of month's that's all the photos i have been taken,.I might have to change my name to sunset stalker.
That's all for now.
Jess
CLOUD STALKER!!!!

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HAIL (3/4 inch or greater)

Hail can cause significant damage to your vehicle, break windows and damage roofs of homes and businesses.
Hail can cause significant bodily injuries such as broken bones and even blindness if wind blown.
Softball (4.5 inches) sized hail was reported in Lake Wales, Florida on March 30, 1996.
Haildrifts, up to four feet deep of dime to nickel sized hail, occurred in low-lying areas near Zephyrhills, Florida on January 29, 1997.
Hailstones the size of softballs can fall at speeds faster than 100 mph

supercell

Supercells derive their rotation through tilting of horizontal vorticity (an invisible horizontal vortex) caused by wind shear. Strong updrafts lift the air turning about a horizontal axis and cause this air to turn about a vertical axis. This forms the deep rotating updraft, the mesocyclone.
A cap or capping inversion is usually required to form a downdraft of sufficient strength. The cap puts an inverted (warm-above-cold) layer above a normal (cold-above-warm) boundary layer, and by preventing warm surface air from sinking too far, allows one or both of the following:
Air below the cap warms and/or becomes more moist
Air above the cap cools
This creates a warmer, moister layer below a cooler layer, which is increasingly unstable (because warm air is less dense and tends to rise). When the cap weakens or moves, explosive development follows.
In North America, supercells usually show up on Doppler radar as starting at a point or hook shape on the southwestern side, fanning out to the northeast. The heaviest precipitation is usually on the southwest side, ending abruptly short of the rain-free updraft base or main updraft (not visible to radar). The rear flank downdraft, or RFD, carries precipitation counterclockwise around the north and northwest side of the updraft base, producing a "hook echo" that indicates the presence of a mesocyclone.