May 2012 featured an early start to the tropical season as two named storms developed near the region and impacted the forecast area. This helped to bring above normal rainfall to both southeast Georgia and northeast Florida as Tropical Storm Beryl made landfall in Jacksonville over Memorial Day weekend. All four climate stations ended up with May rainfall totals that ranked in the Top Ten all-time based on their period of record. Average temperatures were slightly above normal with a few brief warm periods early in the month where temperatures reached into the middle 90s across the region. Several stalled frontal boundaries throughout the month in addition to the tropical rainfall at the end of the month led to precipitation totals of 5 to 10 inches across all of southeast Georgia and northeast Florida and these values were almost 4 times then normal rainfall amounts for the month of May. Daily rainfall records were set at all climate sites on Memorial Day with widespread 2 to 4 inch amounts. Tropical Storm Beryl rainfall totals ranged from 3 to 6 inches area wide with isolated 10 to 15 inch totals across the Suwannee River Valley of northeast Florida with details seen here. The above normal rainfall totals in May erased much of the short-term deficit in rainfall amounts for the calendar year but only eased the long-term drought conditions slightly...as the latest version of the Drought Monitor seen here still shows Moderate to Extreme Drought conditions across all of southeast Georgia and northeast Florida. Rainfall deficits over the last 24 to 36 months remain in the 20 to 30 inch range across much of the region.

 

Climate Station May Average Temp Departure Monthly High Monthly Low May Total Precipitation Departure All-time Rank Wettest Day
Jacksonville, FL  75.2 F  + 1.1 F  96 on 6th  55 on 11th and 20th  10.05"  + 7.57"  5th Wettest  2.83" on 29th
Gainesville, FL  76.9 F  + 2.2 F  96 on 24th and 26th  54 on 20th  6.90"  + 4.42"  10th Wettest  3.25" on 28th
Alma, GA  76.0 F  + 2.3 F  96 on 26th  52 on 11th and 20th  5.02"  + 2.55"  9th Wettest  2.00" on 29th
St Simons Island, GA  76.2 F  + 1.7 F  92 on 5th and 26th  61 on 20th  7.06"  + 5.20"  4th Wettest  1.68" on 29th

The Climate Prediction Center (CPC) forecast for June is showing greater chances of above normal temperatures, while the precipitation forecast for June remains less predictable and thus the forecast of equal chances (EC) of above, below or normal rainfall totals across southeast Georgia and northeast Florida. The CPC forecast can be viewed here.

Jason Hess

Climate Focal Point, NWS Jacksonville

jason.hess@noaa.gov


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