Area Forecast Discussion
Issued by NWS
FXUS62 KTAE 121550
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
1050 AM EST FRI FEB 12 2016
.Near Term [Through Today]...
The latest regional surface analysis showed a quasi-stationary
front from near Savannah westward through east Texas. This
boundary will get nudged further to the south today as the upper
trough along the east coast continues to amplify. The shortwave
embedded in the northwst flow will stay well to our north and then
move off the southeast U.S. coast tonight with no impact locally
other than increasing cloud cover for our northernmost zones. High
temperatures will be above average, in the lower to mid 70s.
.Prev Discussion [1045 AM EST]...
.Short Term [Tonight Through Sunday]...
A dry cold front will move through the region this evening
bringing a cooler and drier airmass to the region for the weekend.
High pressure will build down from the Great Lakes into the
Central Appalachians by Sunday morning. Dry weather is expected
through the short term period.
On Saturday high temperatures will struggle to reach the mid to
upper 50s across the region. Northerly winds will keep drier and
cooler air moving into the region throughout the day.
By Saturday night, another light freeze is possible across the
region. The best chance for freezing temperatures looks to be
along and north of a line to Dothan to Valdosta as the core of the
high pressure area should remain well to the north of the forecast
On Sunday, as the high pressure area moves into the Western
Atlantic the airmass will begin to moist and warm slightly.
Temperatures will return to the low to mid 60s across the region.
.Long Term [Sunday Night Through Friday]...
At the start of the long term system, a potent storm system will
be approaching the region from the west. The 12/00z guidance suite
has come into better agreement with the Euro looking much more
like the GFS, showing an energetic shortwave moving through the
Southeast on Monday afternoon/evening. Even though the surface low
should remain north of the region, the airmass is unlikely to
destabilize enough ahead of this system, so severe weather is not
anticipated. Overall event QPF is only in the 1-1.5 inch range,
given that this system will be fast moving.
By Tuesday, the storm system should be moving out into the
Atlantic and drier and slightly cooler weather will be moving in.
Model guidance is in good agreement that the pattern across the
Eastern CONUS will be shifting from a trough early in the week to
a ridge across the Gulf of Mexico by late week. As a result,
expect dry conditions Tue-Fri with temperatures warming a couple
of degrees each day, initially in the mid 60s Tuesday and in the
mid 70s by Friday.
[Through 12Z Saturday] IFR-MVFR cigs across much of south GA,
south AL, and NW FL will gradually become scattered from mid to
late morning. VFR conditions will prevail from this afternoon
onward. SW-W winds 10 to 15 KT with gusts to 25 KT will develop by
late morning, and will become NW 5 to 10 KT this evening.
Moderate westerly winds at cautionary levels are expected to
persist through the afternoon across the western waters today.
Winds will shift to offshore and approach advisory levels
overnight. High pressure will build near the marine area by
Saturday evening, resulting in lighter winds. Another increase in
winds is expected by Monday ahead of the next storm system.
Daytime dispersion values may exceed 75 at some sites today. A very
dry airmass will likely send RH values below critical thresholds
Saturday afternoon. However, other parameters (fuel moisture, ERC,
and wind speed) are not expected to meet the local Red Flag
Outside of the Suwannee River Basin, rivers continue to drop.
Expect the lower portion of the Choctawhatchee River to drop below
flood stage late tonight.
Releases from Woodruff continue to decrease as inflows to Lake
Seminole decrease as well. Releases this morning are dropping
below 45kcfs and projected to level off around 35kcfs by Saturday.
At this rate, the Apalachicola River at Blountstown should
continue dropping and fall below flood stage late Saturday or
Only the US-84 crossing on the Withlacoochee River remains above
flood stage in that river system. The river should drop below
flood stage there late tonight.
In the Middle and Lower Suwannee, rises will continue as
contributions from the Withlacoochee and Alapaha River reach
Ellaville over the next 36 hours. Peak flow looks to be around
20kcfs or less, so expect all forecast points to stay below action
stage downstream of there over the next week, with the exception
of the US-19 crossing near Fanning Springs, which could reach
action stage around 2/18.
.Preliminary Point Temps/PoPs...
Tallahassee 73 43 59 32 62 / 0 0 0 0 0
Panama City 66 46 57 37 58 / 0 0 0 0 0
Dothan 69 38 54 29 57 / 0 0 0 0 0
Albany 68 38 54 29 56 / 0 0 0 0 0
Valdosta 73 42 57 32 60 / 0 0 0 0 0
Cross City 72 45 63 32 65 / 0 0 0 0 0
Apalachicola 68 48 59 38 58 / 0 0 0 0 0
FL...High Rip Current Risk through late tonight FOR Coastal Bay-
Coastal Gulf-South Walton.