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-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KRLX 212345
AFDRLX

Area Forecast Discussion
National Weather Service Charleston WV
745 PM EDT Thu Sep 21 2017

.SYNOPSIS...
A weak upper level disturbance over the area slips
southeastward this evening. Weak high pressure builds through
the weekend. Cold front approaches by mid next week.

&&

.NEAR TERM /THROUGH FRIDAY/...
-- Changed Discussion --
As of 745 PM Thursday...

No significant changes made this evening. Expect river valley
fog once again...perhaps with a bit later of an onset than last
night.

As of 225 PM Thursday...

A few pop-up showers dot the radar across southern portions of
the area this afternoon, where the cu field is a bit more stout
than farther north. One or two showers may stand up into a
thunderstorm.

The causative weak upper level low drifts southeastward tonight.
This, along with loss of heating, will eradicate the showers
and cumulus around sunset.

Stacked high pressure builds tonight and Friday. Deep layer
light flow will allow for widespread dense valley fog tonight,
which then gives way to a mainly sunny Friday by late morning.

Temperatures close to mostly well converged guidance in this
benign pattern. Lowered the valleys tonight per the MET. The
MET did seem high for Friday, but raised some spots a notch or
so. Temperatures continue above normal per continued upper level
ridging, and no air mass change.
-- End Changed Discussion --

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/...
As of 235 PM Thursday...

Continued hot and dry under high pressure in the short term
period, with foggy mornings.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
As of 235 PM Thursday...

High pressure will continue to dominate for the first part of
next week. Could be a few diurnal pop up showers across the
mountains during peak heating hours early next week, but for the
most part, we should remain dry and hot. An upper trough and
surface cold front will move into the area around Thursday, with
scattered showers and slightly cooler temperatures to round out
the end of the week. QPF at this point still looking to be
minimal.

&&

.AVIATION /00Z FRIDAY THROUGH TUESDAY/...
-- Changed Discussion --
As of 745 PM Thursday...

High pressure building surface and aloft tonight and Friday
spells widespread dense valley fog overnight into Friday
morning, followed by VFR conditions after 13Z Friday. Onset may
be a bit later than last night.

Flow surface and aloft weill be light northeast.

FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 00Z SATURDAY...

FORECAST CONFIDENCE: Medium to high.

ALTERNATE SCENARIOS: Fog timing and density may vary.

EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY
OF WFO FORECAST TO AVAILABLE MODEL INFORMATION:
H = HIGH:   TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.
M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS.
L = LOW:    TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.

DATE                                                            FRI 09/22/17
UTC 1HRLY       00   01   02   03   04   05   06   07   08   09   10   11
EDT 1HRLY       20   21   22   23   00   01   02   03   04   05   06   07
CRW CONSISTENCY  H    H    H    H    H    H    M    L    L    L    L    M
HTS CONSISTENCY  H    H    H    H    H    H    H    M    L    L    L    M
BKW CONSISTENCY  H    H    H    H    H    H    H    M    M    L    L    M
EKN CONSISTENCY  H    H    H    M    M    L    L    L    L    L    L    M
PKB CONSISTENCY  H    H    H    H    H    H    M    L    L    L    L    M
CKB CONSISTENCY  H    H    H    H    H    M    L    L    L    L    L    M

AFTER 00Z SATURDAY...
VLIFR in valley fog each morning through Tuesday.
-- End Changed Discussion --

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...None.
OH...None.
KY...None.
VA...None.

&&

$$
SYNOPSIS...ARJ/TRM/MZ
NEAR TERM...TRM/30
SHORT TERM...SL
LONG TERM...SL
AVIATION...30/TRM