-- Discussion containing changed information from previous version are highlighted. --
636
FXUS61 KRLX 180537
AFDRLX

AREA FORECAST DISCUSSION
National Weather Service Charleston WV
137 AM EDT Tue Jun 18 2024

.SYNOPSIS...
A prolonged heat wave builds throughout the week. Isolated
showers or storms will be possible tonight and Tuesday.

&&

.NEAR TERM /THROUGH TODAY/...
As of 1105 PM Monday...

Updated PoPs to account for isolated showers/storms that have
persisted across portions of the CWA. Otherwise, the rest of the
forecast remains on track.

As of 545 PM Monday...

Have updated PoPs, temperatures, and cloud cover to represent
the latest trends. Overall, a very buoyant (MLCAPE of 2-3K
J/Kg), but weakly forced atmosphere across the region this
evening, with main forcing for ascent being relegated to
antecedent outflow boundaries, land forced ascent, differential
heating, etc. The best chance for isolated thunderstorms this
evening will be across the Mid-Ohio Valley and in/near the
higher terrain. General downslope flow across the central
lowlands should limit activity compared to other areas. A few
strong thunderstorms are possible this evening, particularly
across the Mid-Ohio Valley where deep-layer shear is most
favorable for the potential for isolated organized development.

As of 200 PM Monday...

Key Points:

* Oppressively hot and humid today and Tuesday
* Pop-up thunderstorms could yield locally heavy rain and gusty
  winds this afternoon and Tuesday afternoon

Building heights aloft continue to support high pressure at the
surface. Moisture streaming up out of the Gulf around surface high
pressure will yield surface dew points in the upper 60s and lower
70s today and Tuesday with oppressive humidity peaking Tuesday
before a westward bulge in the the surface high shunts the richer
dew points to the west and north of our forecast area. Temperatures
in the lower to mid 90s with these dew points will support heat
index values 95 to just over 100 degrees.

Uncapped profiles will support pop-up convection both this afternoon
and again Tuesday afternoon. No widespread severe or flooding threat
is expected with this activity, but convective cores cores becoming
precipitation loaded and collapsing could yield some localized
damaging wind gusts along with locally very high rainfall rates.

Heat safety tips:

* Drink plenty of fluids
* Wear light, loose fitting clothing
* Take breaks in the shade or air conditioned locations
* Never leave children or pets in an unattended vehicle
* Check on elderly or heat sensitive individuals
* Know the signs of heat illness

&&

.SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/...
As of 150 PM Monday...

High pressure across the eastern U.S. will remain in control
Wednesday and Thursday, with continued above normal temperatures
across the region. Overall, conditions should be relatively stable
and drier, and am not really expecting much in the way of showers or
storms to develop either of these days. Heat indices both days may
not quite reach the 100 degree mark, but the heat will still be
oppressive none the less, with at least upper 90s heat indices
expected.

&&

.LONG TERM /FRIDAY THROUGH MONDAY/...
As of 1205 PM Monday...

Ridge of high pressure will continue to remain in control for much
of the week, with above normal temperatures, and occasional showers
and storms during peak heating hours. Although dew points will
generally only be in the 60s during the period, the continuation of
temperatures in the upper 90s to possibly even around 100, may
continue to warrant expansion of the heat advisory in time across
much of the lowland counties this weekend. Ridge finally breaks down
towards the end of the period as low pressure moves east across the
Great Lakes region, sweeping a cold front through the area. Along
with a break in the oppressive heat, showers and storms will become
more numerous during the time.

&&

.AVIATION /05Z TUESDAY THROUGH SATURDAY/...
-- Changed Discussion --
As of 130 AM Tuesday...

VFR conditions are present at all sites, though brief MVFR isn`t out
of the question as a few showers and storms traverse the area.
Activity should gradually lessen early this morning, then a few
areas of fog may form - generally in locations that received
rain earlier in the night. Any fog should dissipate around
sunrise, resulting in a return to areawide VFR. While mainly
VFR conditions are then anticipated for the balance of the TAF
period, brief reductions could occur in isolated showers and
storms that once again develop during the day.

Light south to southeast flow is expected outside of convection.


FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 06Z WEDNESDAY...

FORECAST CONFIDENCE: Medium.

ALTERNATE SCENARIOS: Brief VIS restrictions could occur in fog
overnight and showers/storms during the day. Coverage of both
fog and precipitation may vary from the forecast.


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                                             TUE 06/18/24
UTC 1HRLY       03   04   05   06   07   08   09   10   11   12   13   14
EDT 1HRLY       23   00   01   02   03   04   05   06   07   08   09   10
CRW CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H
HTS CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H
BKW CONSISTENCY  H    H    H    H    H    H    H    L    L    H    H    H
EKN CONSISTENCY  H    H    H    M    L    L    M    M    L    H    H    H
PKB CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H
CKB CONSISTENCY  H    H    H    H    H    H    H    H    H    H    H    H

AFTER 06Z WEDNESDAY...
No widespread IFR conditions are expected at this time.
-- End Changed Discussion --

&&

.CLIMATE...
As of 930 PM Monday...

A prolonged heat wave continues across the area through this
week. Temperatures are forecast to approach record highs at some
locations on several days. The records for Tuesday, June 18 to
Sunday, June 23 are listed below for our official climate
sites, along with the current forecast values.

           Forecast / Record High Temperatures
--------------------------------------------------------
       Tuesday, 6/18 | Wednesday, 6/19| Thursday, 6/20 |
--------------------------------------------------------
CRW | 93 / 98 (1944) | 92 / 98 (1919) | 95 / 99 (1931) |
HTS | 93 / 98 (1944) | 92 / 98 (1994) | 96 /100 (1931) |
CKB | 93 / 96 (1936) | 93 / 94 (1994) | 95 / 94 (1931) |
PKB | 94 / 98 (1944) | 93 / 95 (1994) | 97 / 97 (1931) |
BKW | 86 / 93 (1936) | 85 / 90 (1944) | 89 / 92 (1931) |
EKN | 89 / 91 (1994) | 90 / 89 (1905) | 93 / 92 (1931) |
--------------------------------------------------------
       Friday, 6/21  | Saturday, 6/22 |  Sunday, 6/23  |
--------------------------------------------------------
CRW | 97 /105 (1931) | 98 / 98 (1988) | 95 /100 (1929) |
HTS | 98 / 99 (1953) | 98 / 98 (1988) | 95 /100 (1930) |
CKB | 97 / 98 (1953) | 96 / 97 (1923) | 95 / 96 (1957) |
PKB | 99 / 97 (1953) | 98 / 98 (1988) | 95 / 94 (1964) |
BKW | 91 / 93 (1953) | 91 / 92 (1931) | 89 / 91 (1931) |
EKN | 93 / 92 (1953) | 94 / 93 (1923) | 91 / 89 (1899) |
--------------------------------------------------------

Additionally, the all-time June high temperature records may
be neared in some locations. Listed below are the maximum
temperatures currently forecast during the heat wave versus
the all-time June high temperature records.

     Max Forecast  All-time June Record
-----------------------------------------
CRW |     98     |       105 (1931)     |
HTS |     98     |       105 (1930)     |
CKB |     97     |       100 (1925)     |
PKB |     99     |       100 (1988)     |
BKW |     91     |       100 (1936)     |
EKN |     94     |        96 (2012)     |
-----------------------------------------

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...Heat Advisory until 8 PM EDT Friday for WVZ005>011-013>020-
     024>032-039-040.
OH...Heat Advisory until 8 PM EDT Friday for OHZ066-067-075-076-
     083>087.
KY...Heat Advisory until 8 PM EDT Friday for KYZ101>103-105.
VA...None.

&&

$$

SYNOPSIS...JP/SL/GW
NEAR TERM...JP/GW
SHORT TERM...SL
LONG TERM...SL
AVIATION...JLB

CLIMATE...