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|Snowfall in Tallahassee|
Most people don't think of snow when the think of Florida. However, newcomers to the area, especially those that hail from the northern climes, may be surprised to learn that it has snowed in Florida many times. In Tallahassee, measurable snow has not fallen since 1989, so we are overdue. Last winter, NWS Tallahassee Climate Focal Point, Tim Barry, responded to an inquiry from a reporter for Florida State Universtiy's FS View & Florida Flambeau, concerning snow climatology in Tallahassee. The Q & A is included below.
|Decade|| All Occurrences
(trace or more)
From the information provided in the 1st question, we see that it snowed 32 times in Tallahassee since 1891. Please note that all but 7 of these occurrences were only Trace amounts. If we were to divide the period of record (113 years) by 32 we would get a frequency of once every 3.5 years. But as you can see from above, the more frequent occurrence of snow in the 50's ,60's and 70's have skewed the results. The return period for measurable snow is just once every 16 years.
The best synoptic set up for seeing snow in Tallahassee is to have a cold airmass in place over the region and have a weak low pressure system develop over or move eastward across the northeast Gulf of Mexico. If the system is too strong, the southerly flow would push a warm front northward and we would end up in the warm sector (not good). The low pressure system that I am referring to is very similar to the one that just occurred Friday, January 9th. The reason we didn’t see snow was obvious. The temperatures were not even close to being cold enough with readings that day in the 50s. Also, just to have cold air in place at the surface is not good enough. The depth (thickness) of this cold air is critical. If it is not thick enough, we could end up getting a cold rain, sleet, or if the surface temperature is 32 degrees F or below; freezing rain.
I would not say freak, but for all weather parameters to come together as mentioned in the above question, it is not very probable.
We don’t need a gulf low to get snow in Tallahassee but that is our best scenario. A strong cold front can bring a chance for snow but there has to be some lingering moisture when the cold air arrives. More often than not, by the time the cold temperatures arrive that would support the frozen precipitation, the moisture is long gone.
The most snow recorded in a 24-hour period was 2.8" from February 12th - 13th, 1958 .
The National Weather Service does not forecast seasonal chances for snow.
The public forecasts provided by the National Weather Service only extend out to 7 days. The Climate Prediction Center (CPC) is forecasting colder than normal weather conditions for our area of the country from now through the end of February. There are equal chances for above, below, or normal precipitation.
The last measurable snowfall in Tallahassee was 1" on December 22-23, 1989. I was not in Tallahassee at the time but this must have been very exciting for residents to have experienced a white Christmas.
Northerners like myself, who move to Tallahassee may be surprised to learn that it does get cold here during the winters. There is a significant difference between the climate of north Florida and the southern portions of the peninsula. On average, we experience 35 days with minimum temperatures at or below freezing with most of these occurring from December through March. The coldest temperature ever recorded in Tallahassee was -2 F on February 13th 1899. More recently, we dipped down to 6 degrees F on January 21st, 1985.
Yes. The decision to keep schools opened or closed has to be made in most cases before the events even start. Therefore, just the mere threat of snow has prompted the local school authorities to close schools in the past. Fortunately, when we had our last measurable snow of 1", schools were closed for the Christmas break.