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Thursday's warm front will bring clouds and a few showers, and isentropic lift will help set off some heavier rain in a few spots. Isentropic left is common with fronts over Florida lifting north, forcing warm air aloft. The air cools, water condenses out, and it rains. Sometimes a lot of rain. A similar event in boynton a few weeks ago left flooding in just a few hours. I'm not expecting flooding rain Thursday, but heavier cells are possible in the evening.
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The cool front sits over Orlando tonight, and will be the first cool down in a few weeks. This will be a La Nina Winter for Florida, which means warmer then normal weather is possible into the Spring. The jet stream shifts north in a La Nina situation, bringing fewer cold fronts through our areas. But be forewarned, the fronts that do make it south are unusually strong and promise severe weather in their wake.
Rainfall is likely to be less than normal, already agravating the severe drought conditions over the Lake.
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Hopefully you can see the Boynton Beach Waterspout taken by Antony Venero from the Sea Mist 3. If not, I'm told we have a team of web developers working on getting images on this blog. Hopefully it will happen soon. I can't wait!
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Just a few days left to hurricane season and it's very quiet out there. Upper level winds have strengthened over the Atlantic, shearing any developing systems quickly. There is one area of storms near the Caribbean, but that is unlikely to develop this week. We can see storms outside the season, but those are rare and usually very weak.
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I have no scientific evidence to back up what I'm going to write, other than my daily run at the beach every day. But it appears we lose more sand off our beaches from the persistent high pressure systems that set up in the Fall and Spring, than from any hurricane or tropical storm.
We had three devastating hurricane in 04 and 05, but the beaches faired pretty well. This weeks pounding waves are a different story, washing away hundreds of miles of beach on the East Coast of Florida. Lifeguard towers are now on or in front of the dunes, the last remaining dry spots on the beach. We experience this weather pattern several times each year, as the Bermuda High strengthens over the Carolinas and forces a large swell into Florida. It lasts for days, and high tide pushes a little closer to A1A and the condos.
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Waterspout sent in by viewer at 3pm Monday Sept. 17. Doppler radar also noticed a rotation at the time.
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This was sent in by Libby P. in Port St. Lucie. Iridescence is caused by ice crystals refracting sunlight in a special way.
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Here are some photos of the impressive waterspout seen by thousands of people on Monday. A marine warning was issued for the coastal areas at 1:30pm, and St. Lucie schools were under lockdown just in case. Sent in by james Tutak.
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Today was the first time on record that two hurricanes made landfall on the same day. Henriette is a PAcific hurricane that made landfall on Baja today, and Felix made landfall on Nicaragua this morning, with winds at 160mph.
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Strong storms over south county this afternoon. These photos were sent in by a viewer in Boca. This was taken looking west from a water park. Time of photo roughly 5:20pm. This funnel was never confirmed touching the ground, and no damage was reported.
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Right now at 8pm monday Felix is a cat. 4 storm ready to strike Nicaragua. Last night at 7pm, a dropsonde was released at 10,000'. Dropsondes are weather instruments that have a small parachute attached. They float to the ground taking weather readings as they fall. The dropsonde released in the eyewall almost made a complete circle through the hurricane before it hit the ocean! Here's part of the NHC bulletin...
HURRICANE FELIX SPECIAL DISCUSSION NUMBER 10
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL062007
800 PM EDT SUN SEP 02 2007
REPORTS FROM A NOAA HURRICANE HUNTER AIRCRAFT INDICATE THAT FELIX HAS INTENSIFIED AND IS NOW A CATEGORY FIVE HURRICANE... A DROPSONDE RELEASED IN THE SOUTHWEST QUADRANT LANDED IN THE NORTHEAST QUADRANT...AND THIS DROP YIELDED A SURFACE ESTIMATE OF 139 KT BASED ON THE LOWEST 150 M LAYER AVERAGE... BECAUSE OF THE EXTREME TURBULENCE AND GROUPEL THAT THE AIRCRAFT EXPERIENCED...THE MISSION IS BEING ABORTED AND THE AIRCRAFT IS RETURNING TO ST. CROIX.
As the plane, a C130, punched through the eyewall, an updraft jolted the plane skyward, then a downdraft hit seconds later. The result was a 4G ride, in a plane designed for only 6g's. The mission was aborted at this point, and the plane returned home. No damage was reported!
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After 'What's the Weather?', the most frequently asked question is 'Where is the Bermuda High?'. The High played a big part in the 2004 hurricane tracks. Stornger and a little farther south that Summer, the high drove storms toward Florida in what become a record 4 landfalls.
This month the High has been in roughly the same position as 2004. Not necessarily cause for alarm, since it's still early in the season, and it's impossible to forecast where the high will be located in August and September, a critical time for hurricane season.
So no need to worry, and I'll keep you up to date if the high sticks around for another month.
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If you're interested in becomming a severe weather spotter for the National Weather Service in Miami, the one day training is on July 28. Here is some more information.
http://www.srh.weather.gov/mfl/skywarn.php
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The final day of the Ride. Mo Foster had so much fun he joined me again, and my good friend Pam came along too. About 35 miles today. A strong wind at our back and a little rain but that was it. A huge donation of $2500. from the famous Moquila restaurant in Boca http://www.moquila.com/ made for a great day. Defintely check out this restaurant and tell Mark the owner that Steve sent you. Jenn Witt from south county Red Cross always does a great job with the organizing, and makes the last stop one of the best!.
Glad it's done this year. Thanks to Bob Leak for all the photography, and putting up with my occasional meltdowns. BTW, the bike went for $2000. to another good friend, Carey O'Donnell, who runs a big PR company in the Palm Beach area. Thanks Carey.
And my two anonomous supporters, who year after year donate thousands to the bike ride. I'm forbidden to mention their names, but this year they donated $7500. Thanks to all.
Steve
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