JKL issues Area Forecast Discussion (AFD) at May 10, 7:04 PM EDT362
FXUS63 KJKL 102304
AFDJKL
AREA FORECAST DISCUSSION
National Weather Service Jackson KY
704 PM EDT Fri May 10 2024
.KEY MESSAGES...
- Some showers and perhaps a storm or two are possible, at times,
this afternoon and Saturday afternoon.
- Precipitation free weather is anticipated from Saturday night
into Monday morning, before unsettled weather returns.
- Expect cooler temperatures through the weekend, with milder
weather then returning.
&&
.UPDATE...
Issued at 703 PM EDT FRI MAY 10 2024
There are a few isolated showers remaining over far eastern
Kentucky where PoPs are currently less than 15, but these showers
are expected to dissipate in the next 1 to 2 hours with the loss
of daytime heating. Also lowered forecast lows in many of the
sheltered valleys another degree or two for tonight. Otherwise,
the forecast is on track and no significant changes are needed.
&&
.SHORT TERM...(This evening through Saturday night)
Issued at 322 PM EDT FRI MAY 10 2024
Shortwave trough, embedded within broader troughiness across much of
the county, is clearing our region this afternoon. Shortwave ridging
will replace it briefly, providing equally brief clearing skies,
good enough for aurora watching, per Space Weather Prediction
Center's severe geomagnetic storm warning! Not certain it will be
visible this far south, but worth a look. Relatively light winds and
these clear skies should promote valley fog formation late tonight.
In the wake of this morning's cold front, expect low temperatures to
fall into the 40's for most locations.
Saturday, another shortwave trough will cross the region,
reinforcing the cold front and bringing another night with lows in
the 40s Saturday night. Along the front, we'll see another potential
for light rains, similar to today. Also similar to today, the
deepest moisture and thus potential for storms look to be in far
eastern KY. Forecast soundings west of Jackson show a fairly stout
inversion above about 700 mb, but it's weaker east of Jackson.
.LONG TERM...(Sunday through Friday)
Issued at 420 PM EDT FRI MAY 10 2024
The 10/12z model suite is in good agreement Sunday morning showing
eastern Kentucky under rising heights as the upper level troughing
begins to lift away to the northeast. This will set the stage for
surface high pressure to crest over the Central Appalachians
later Sunday and Sunday night. A slow-moving filling low/trough
then tracks from the Central Plains on Sunday Night to over the
Ohio Valley late Tuesday and Tuesday night and off the Southern
New England shore on Wednesday night and Thursday. Under this
atmospheric undulation, a weak surface low will follow a similar
path from Kansas, directly across the Ohio Valley, and then off
the Mid-Atlantic coast. A weak cold front settles through our
area on Wednesday as that low departs. Surface high pressure and
shortwave ridging aloft return Wednesday night into Thursday
before yet another upper level trough and weak surface low
approach for Friday.
The sensible weather will feature dry periods interspersed with
rain chances as these systems pass. Initially, high pressure will
ensure seasonably cool and dry conditions on Sunday and Sunday
night. Expect temperatures to reach the lower to middle 70s on
Sunday followed by lows in the mid 40s to lower 50s on Sunday
night, all the while under clear to partly cloudy skies. This will
favor fog forming in the typical valley locations again on Sunday
night. Sunshine fades on Monday as clouds thicken from the
southwest. A few showers become possible by late in the
afternoon, primarily west of I-75. It will be milder with highs in
the mid 70s west to the lower 80s far east. A spell of numerous
to at times widespread mostly light to moderate shower activity
is then expected from Monday night into Wednesday. The
precipitation and cloud cover should lead to suppressed diurnal
temperature ranges, primarily lower to middle 70s during the day
and mid to upper 50s at night. A general 0.75 to 1.50 inches of
rain expected to fall across most of the area during this
timeframe. Some thunder is also possible but instability appears
very marginal. Clearer and drier weather then makes a brief
comeback Wednesday into Thursday under weak ridging before more
showers and possible thunderstorm chances return late Thursday
through Friday with another trough/weak surface low. High
temperatures warm back to around 80 degrees on Thursday under some
sunshine before thicker clouds hold highs in the 70s on Friday.
Nighttime lows remain mild, primarily in the 50 to 60 range.
&&
.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
ISSUED AT 112 PM EDT FRI MAY 10 2024
A cold front has cleared the region early this afternoon, but post
frontal cloud cover has lingered, with ceilings in a few spots
briefly IFR. Still seeing a few showers, but the back edge has
just cleared KSYM and any further activity should be limited to
KJKL/KSJS before ending in the next few hours. VFR conditions
should be at all sites before the evening hours. With partly
cloudy skies and light winds, expect some valley fog formation,
but no concerns at TAF sites. Expect winds to pick up from the
west, ahead of the next disturbance to cross the region. Rain
chances return early Saturday afternoon.
&&
.JKL WATCHES/WARNINGS/ADVISORIES...
NONE.
&&
$$
UPDATE...CMC
SHORT TERM...SHARP
LONG TERM...GEERTSON
AVIATION...SHARP
Source:
JKL issues Area Forecast Discussion (AFD) at May 10, 7:04 PM EDT---------------
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