textproduct: Jacksonville

KEY MESSAGES

For the latest NE FL and SE GA Daily Key Messages please visit: https:/www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

- Cold Weather + Freezes Tonight Then This Weekend. Light Freeze and Widespread Frost throughout Southeast GA and the. Hard Freeze Potential for Inland Areas Sunday Night + Monday Morning. Low Wind Chill (potential Cold Weather Advisory) Sunday night and

- Monday Morning [Wind Chills: 15-25F]

- Small Craft Advisory This Morning and again Late

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/

Mostly clear skies today will allow temps to warm into the low to mid 60s across NE FL and the mid and upper 50s for SE GA this afternoon despite the cooler, drier air gradually funneling in behind this early morning's front passage.

Tonight, clear and calm conditions will allow for excellent radiational cooling with light freezing conditions likely for the Suwannee Valley and interior SE GA. There will also be areas to widespread frost for interior areas from Gainesville north and possibly as far east as the west side of Jacksonville. There is a Freeze Warning and a Frost Advisory in effect and have been unchanged.

Though the airmass will be dry, given the excellent cooling and lingering ground moisture from last weekend's wet weather, patchy shallow ground fog may develop especially in open fields. Lows tonight will be the low to mid 30s for inland areas and low 40s at coastal locations.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/

Surface high pressure slides east of our area on Friday and further into the Atlantic on Saturday as mainly zonal flow aloft persists. Mainly weak flow in the low levels will continue through the short term as a result of the weak high/weak pressure gradient influence, with dry and close to seasonal temperatures and more sunshine than clouds, especially on Friday. Highs on Friday will be in the mid 60s north to lower 70s south, warming up a bit more for Saturday to the upper 60s north and low to mid 70s south. Widespread lower to mid 40s expected Friday night with good radiational cooling, and just a few degrees warmer Saturday night as low level winds come around to southwest and increase slightly ahead of the next cold front. Just enough pooling of low level moisture may also result in some patchy fog inland areas around the Suwannee Valley early Saturday morning and across much of interior northeast FL early Sunday morning with the light southwest flow off the Gulf.

LONG TERM /SUNDAY THROUGH THURSDAY/

Cold front approaches the area by Sunday Morning, progressing southeastward throughout the day and into the night. Tight surface pressure gradient will bring breezy conditions Sunday Night and Monday after the front moves through, as well as another shot of very cool and dry conditions with temps around 15-20 degrees below normal by Monday. Rain chances look to be low overall at this time with the frontal passage, though the highest probability of a isolated to scattered shower Sunday afternoon and evening will likely be over interior GA. Cool to cold conditions will be fairly short lived however as the associated surface high quickly moves northeast of the area Tuesday and into the Atlantic for midweek.

Cold conditions behind the front will bring a potential for freeze/hard freeze away inland the further north and west you go Sunday Night into Monday Morning, though frost will be quite patchy due to the breezy conditions. Similar potential will be expected for Tuesday Morning as well, with areas of frost also expected to be more common as winds relax Monday Night. Both max and mix temperatures trend upward Tuesday and into mid week as the airmass moderates.

AVIATION /00Z FRIDAY THROUGH 00Z SATURDAY/

VFR conditions are expected with light northwesterly winds trending calm overnight.

MARINE

A high pressure center will build over the area tonight into Friday and then shift offshore by early Saturday ahead of the next frontal boundary. This next front will likely remain dry as it crosses our local waters on Sunday night. Strong, arctic high pressure building behind this frontal passage will result in strong northerly winds on Sunday night that will shift to northeast on Monday. Small Craft Advisory conditions with Gale-force gusts will be possible across our local waters from Sunday night through Monday.

Rip Currents: SE GA Low Friday NE FL Low Friday

FIRE WEATHER

LOW DAYTIME DISPERSIONS ACROSS NORTH CENTRAL FL AND COASTAL NORTHEAST FL LOCATIONS ON FRIDAY...

Fair to good dispersions will be expected for the rest of the daytime today with modest low level winds behind a passing cold front. Remaining dry as well, though minRH values are expected to remain well above any critical levels. High pressure moves almost directly overhead tonight and through Friday, which will result in lighter winds and therefore poor to fair dispersions Friday afternoon/evening. Winds shift more south to southwesterly this weekend with warmer but dry conditions before a front moves through Sunday Night, ushering in another drier and even cooler airmass for early next week. Rain chances are low at this time with the front, and best chances for showers will be over inland GA Sunday afternoon/evening.

FOG POTENTIAL AND OTHER REMARKS: A light freeze possible for inland southeast GA and the Suwannee Valley for Friday morning. Patchy fog possible for inland areas late Friday night and again Saturday night.

PRELIMINARY POINT TEMPS/POPS

AMG 32 64 42 68 / 0 0 0 0 SSI 41 65 48 68 / 0 0 0 0 JAX 36 69 43 72 / 0 0 0 0 SGJ 41 69 48 72 / 0 0 0 0 GNV 36 71 44 75 / 0 0 0 0 OCF 36 72 43 75 / 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES

FL...Freeze Warning from 4 AM to 8 AM EST Friday for FLZ021-023-024- 030-120-220-322-422-522. Frost Advisory from 4 AM to 8 AM EST Friday for FLZ031-035-124- 136-225-232-236-425. GA...Freeze Warning from 4 AM to 8 AM EST Friday for GAZ132>136-149- 151>153-162-163-165-250-264-350-364. Frost Advisory from 4 AM to 8 AM EST Friday for GAZ154-166. MARINE...None.