The Impact Weather Update (IWU) provides a chronological series of discussions to detail conditions expected over the next 8 hours. The IWU was designed to supplement existing NWS products by providing more frequent information in a less formal format. IWU entries will only be available when workload permits, most often on weekdays between late morning and early afternoon. When severe weather becomes imminent, IWU posts will often cease due to increasing workload. East Central Florida counties include: Volusia, Seminole, Lake, Orange, Brevard, Osceola, Indian River, Okeechobee, Saint Lucie and Martin. Please provide us with your comments concerning the IWU.
Wednesday, November 25, 2009
Posted at 1:13 PM
Edited on: Wednesday, November 25, 2009 1:14 PMHeaviest rainfall over Atlantic--moving away
Through late afternoon, an area of showers and storms over the Atlantic waters will push farther away from the coast. An area of light to moderate showers will continue to push slowly eastward across the peninsula. A few showers with brief heavy downpours will also occur. Rainfall amounts will average less than a quarter inch, but locally up to around a half inch will be possible.
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Early afternoon satellite showed extensive cloudiness across the peninsula and eastern Gulf of Mexico. Radar has showed that the strongest convection was pushing away into the Atlantic and the trailing echoes are of light to moderate intensity. This rainfall should linger through the evening hours, but amounts are expected to be less than a half inch.
Posted by Randy LascodyPosted at 10:50 AM
Edited on: Wednesday, November 25, 2009 11:04 AMcloudy day with occasional light rain, slight chance of storms
Through early afternoon, considerable cloudiness with occasional periods of light rain can be expected. Some showers with heavy rain and occasional lightning strikes will occur, mainly from near Cape Canaveral across metro Orlando and Lake county.
Scattered to numerous showers with isolated strong storms will affect the Atlantic waters, especially over the Gulf Stream.
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A quick look at a visible satellite image shows that there is little chance for much sunshine today.
A stalled frontal boundary across the area will have a few weak low pressure waves riding along it. This will produce occasional showers, but the high amount of cloudiness will keep the chance for strong storms low. Occasional lightning strikes will be the main hazard. A few brief breaks in the clouds may occur in the counties around Lake Okeechobee, possibly increasing instability and leading to some strong storms late in the afternoon.
Posted by Randy LascodyPosted at 8:32 AM
large area of showers approaching, storms over Gulf Stream
Through late morning, a large area of showers will spread northward out of south Florida and begin to affect areas from about Orlando to Cape Canaveral. Some of the showers will produce heavy downpours and occasional lightning strikes.
A band of showers and isolated storms will occur over the Gulf Stream. A few of these storms could produce waterspouts.
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The surface analysis at 9 am showed an inverted trough (representing a frontal boundary with an incipient surface low) slicing across central Florida from southwest to northeast. A large area of convection over the southeast Gulf of Mexico was moving northeastward along this boundary, and should provide an extended period of showers for much of east central Florida, especially from about Orlando to Canaveral and points southward. Due to extensive cloud cover and rain cooling, there does not look to be enough instability for severe storms. The warmth of the Gulf Stream may lead to a few waterspouts there, especially through around midday.
Posted by Randy Lascody
