What the forecast actually says
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Area Forecast Discussions are the real forecasts, written 3 to 4 times daily by NWS meteorologists reading the models and interpreting what they mean for your area. They offer far deeper insight than any weather app, but they're written in dense meteorological shorthand. Plaincast uses Anthropic's Claude to summarize them into plain English, side by side with the annotated original.
Revised in 14 passages since the 1:21 PM discussion. See every revision.
For the latest NE FL and SE GA Daily Key Messages please visit: https:/www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf
Very Hot & Humid Weather Continues Today: Heat Index 106 - Heat Advisories Possible again Next Week for Portions of Our Area.
Moderate Rip Current Risk Continues at Area Beaches
Scattered to Numerous Afternoon & Evening Storms Sat through Mon. Strong Storms, Frequent Lightning Strikes & Locally Heavy Downpours Possible.
Strong Storms and Locally Heavy Downpours Possible This Afternoon and Early Evening from I-95 to US Highway 301
Heat Advisory in effect from Noon to 7PM for Northeast FL and portions of Southeast GA
Higher precipitable water have moved into the area as the front slowly sinks into central Georgia, higher precipitation chances are expected today compared to the past few days. Storms are forecast to increase in coverage in the early afternoon, and beginning to dissipate after sunset, although a few isolated storms may linger a few hours after. Impressive DCAPE values are currently present over most of northeast Florida and coastal southeast Georgia, any strong storm development will pose a threat to wind guts of 40-60mph. Highest strong storm chances today will be near US301 to I95 as northwest winds keep the Atlantic sea breeze pretty close to the coast. Slower storm motion and training storms will bring concern for localized flooding over generally flood-prone areas.
Ahead of the storms, temperatures will rise into the mid to upper 90s generally south of Waycross, where a Heat Advisory remains in effect through 7pm due to heat indices reaching 105-110 degrees.
Numerous Afternoon and Evening Thunderstorms Sunday, Drier for Some Monday
Strong Storms and Locally Heavy Downpours Possible Each Day
A cool front sagging southward throughout Sunday, stalling and becoming diffuse by Monday, will be the primary feature affecting our weather for Sunday and into Monday. precipitable water of 2+ inches ahead of the boundary combined with the frontal boundary and sea breeze/outflow will result in numerous showers and t'storms. Steering flow in the 10-15 knot range from the northwest will help to limit flooding potential somewhat despite the abundance of moisture, though localized slow moving cells and/or training could result in some isolated flooding concerns. Outside of heavy rainfall, temperatures/lapse rates aloft via forecast soundings are not overly impressive, though some lingering pockets of drier air aloft could result in an isolated strong to severe cell, especially towards the I-95 corridor closer to the east coast sea breeze that will be nearly pinned. High temperatures will remain above normal Sunday, generally in the mid 90s with some readings in the upper 90s possible. Currently forecast to remain just below any heat advisory criteria, though issuance will be possible later this evening or tonight depending on latest guidance and trends.
Monday, a swath of lower precipitable water around 1.6 to 1.8 inches will make a push southward along with slightly stronger subsidence aloft, and therefore will limit coverage of convection to an extent, especially the further north and west you go. The highest chances for convection, especially stronger convection, will be generally towards the I-95 corridor and St. Johns River Basin region in northeast FL closer to the nearly pinned developing daily Atlantic sea breeze. Similar setup expected regarding temperatures, as highs will be generally in the mid 90s and currently forecast to be just below advisory criteria.
Heat Advisory Conditions Possible Across Much of Our Area During the Early to Middle Portions of Next Week
Drier for Most Tuesday, Higher Shower and Thunderstorm Coverage Likely Wednesday/Thursday
Guidance continues to suggest at least Tuesday being a day with more suppressed convection for many, which will likely allow temperatures to rise into the mid to upper 90s for much of the area that may last into Wednesday as well. Another frontal boundary looks to drop southward on Wednesday and into Thursday with a modest amount of upper level support as well, returning higher coverage of showers and t'storms for Wednesday but especially Thursday and into Friday before the front stalls almost directly over the area into the end of the week. Guidance varies a fair amount regarding how far southward the front makes it and therefore the amount of drier air that intrudes into the region, though given that we are still well into the swing of summertime, leaning towards a wetter more unsettled solution for now with a front stalled further north. Temperatures will drop closer to normal with the boundary/more active convection for the end of the week.
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