Archive for the ‘Hurricane outflow’ Tag

Clouds From Irene Over Citrus County, Florida

I was out pulling weeds around 8 pm EDT at my home in Citrus County, Florida when I saw cirrus clouds moving along at a fairly good clip.  After taking a few quick photographs, I went to my computer to confirm what I suspected I was seeing.  I consulted both an up-to-date satellite visible loop and an infrared loop.  Sure enough, the cirrus I was observing marked the outermost segment of an outflow band from hurricane Irene.

Here is a photo as I faced the WSW.    (The gray clouds are little fracto-cumulus at a much lower altitude than the very high cirrus).

– – LEFT CLICK ON PHOTO TO ENLARGE –

The graphic below shows the general direction of movement of both the inflow and the outflow of a hurricane in the northern hemisphere.  This particular one is hurricane Ike of 2008.

HURRICANE PALOMA IS HEADING FOR CUBA

LEFT CLICKS SHOULD ENLARGE THIS IMAGE

LEFT CLICKS SHOULD ENLARGE THIS IMAGE

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Paloma is now a “high-end” category 1 hurricane and continues to strengthen.  The greatest concerns throughout the Caymans are high winds – storm surge concerns are not as pressing.  Jamaica is expected to get only fringe winds.  Paloma is expected to continue toward the northeast, travel across Cuba and into the Bahamas.

Those of you who have studied the circulation of air with tropical cyclonic systems can probably “see” in the satellite image above both inflow and outflow cloud patterns.  For those who are not familiar with the difference between the two I am including an image below of hurricane Ike on September 9, 2008.  He is centered just offshore of northwest Cuba.  I have drawn air flow arrows to show the cyclonic inflow (red) and the flow that occurs aloft, anticyclonic outflow (blue).

LEFT CLICKS SHOULD ENLARGE THE IMAGE

LEFT CLICKS SHOULD ENLARGE THE IMAGE

Inflow consists of the harder-edged clouds with sharp contrast – Outflow consists of the more diffuse cirrus and cirrostratus of the upper layer.