Mostly cloudy. Chance of showers in the evening...then slight chance of showers after midnight. Lows in the mid 60s. Southeast winds 5 to 10 mph. Chance of rain 30 percent.
Wednesday
Breezy. Partly cloudy with slight chance of showers in the morning...then mostly cloudy with showers likely and chance of thunderstorms in the afternoon. Some thunderstorms may be strong with gusty winds in the afternoon...with the potential for severe thunderstorms late in the afternoon. Highs in the upper 70s. South winds 15 to 20 mph with gusts to 25 mph. Chance of rain 70 percent.
Showers and chance of thunderstorms in the evening...then partly cloudy with chance of showers and thunderstorms after midnight. Some thunderstorms may be severe with damaging winds in the evening. Lows in the upper 50s. Southwest winds 10 to 15 mph. Chance of rain 90 percent.
Thursday
Partly cloudy with a 20 percent chance of showers. Highs in the lower 70s. West winds 5 to 10 mph.
... Risk of severe weather expected on Wednesday and Wednesday night...
A low pressure system is expected to continue to develop over the central Gulf Coast states today and track northeast tonight and Wednesday. A warm front will lift northward over northeast Florida and southeast late tonight and early Wednesday.
A trailing cold front from the low pressure system will push toward the area Wednesday and will be preceded by a line of showers and thunderstorms. Although atmospheric instability is not particularly high... strong winds aloft in combination with strong lift from the cold front will support strong to severe thunderstorms. The primary threat from severe storms will be damaging winds but there is a risk of an isolated tornado mainly within the squall line. Cloud to ground lightning and very heavy rainfall will also accompany the squall line. Although there is some uncertainty on the timing of the squall line... the best estimate at this time is it moving to a Alma Georgia to Live Oak Florida line by mid afternoon Wednesday and then move to coastal Georgia and northeast counties by about 8 PM Wednesday evening. The severe weather threat should be ending by late Wednesday night as the cold front sweeps south of the area. The Storm Prediction Center has highlighted a slight risk of severe thunderstorms for the Jacksonville forecast area.
Outside of the main line of showers and storms... individual showers and thunderstorms may even produce wind gusts of 40 to 50 mph Wednesday morning through Wednesday night. Winds of this intensity are capable of uprooting small trees and overturning sheds and small structures.
Law enforcement agencies... emergency management officials... storm spotter groups... and other interested concerns should monitor this situation and take appropriate action should severe weather approach your area.
Marine interests operating in the coastal and inland waters... be aware of the risk of high winds and rough seas with approaching storms and be prepared to seek safe Harbor.
Stay tuned to NOAA Weather Radio... commercial television or radio stations... or your cable television provider for later statements concerning this severe weather event.
Public Information Statement
Statement as of 2:35 PM EST on December 1, 2009
... November 2009 climate summary for Jacksonville...
... mostly warm and dry...
November was mostly a quiet and mild weather month. The remnants of Hurricane Ida passed through the area on the 10th and 11th... otherwise there were just a couple of frontal passages and upper level disturbances that changed the day to day weather pattern.
Temperatures...
At Jacksonville International Airport the average temperature for November was 62.3 degrees... 0.6 degrees above normal.
The warmest day of the month was 82 degrees on the 10th. The coldest day was the 28th with 34 degrees. There were no records tied or broken.
Rainfall...
November is normally our driest month of the year... however this year was drier than usual. November rainfall totalled less than an inch... only 0.85. This is 1.49 inches below normal. There were only 4 days of measurable rainfall. The greatest 24 hour rainfall total for November was 0.47 of an inch on the 10th and 11th. This follows a dry fall pattern where September was 1.42 inches below normal and October was 1.83 inches below normal.
Wind... the average wind speed for November at Jacksonville International Airport was 5.3 miles per hour. The peak wind gust for the month was 30 miles per hour from the east and southeast on the 9th and 10th.
For energy consumption purposes... there were 108 heating degree days in October... which is 40 below normal. There were 36 cooling degree days which is 28 below normal.
The outlook for December calls for near to below normal temperatures and above normal rainfall. The normal monthly temperature for December is 55.0 degrees. The normal daily high is 65.8 degrees and the normal daily low is 44.1 degrees. Normal December rainfall is 2.64 inches.
Additional rainfall reports from around the area...
Rainfall reports are preliminary. Co-op sites report a 24 hour total not based on a midnight to midnight calendar day.
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Cocorahs... the community collaborative rain... hail... and snow network... cocorahs. This public volunteer rain gauge network is open to anyone willing to measure and report precipitation. Go to the cocorahs website for more information and to sign up. Http://www.Cocorahs.Org