Area Forecast Discussion
Issued by NWS Wilmington, OH

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS61 KILN 280547
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
147 AM EDT SAT MAY 28 2016

.SYNOPSIS...
High pressure off the east coast will result in warm and humid
conditions with a chance of showers and thunderstorms through
Sunday. A weak cold front will move through Sunday night into
Monday.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
Despite a persistent signal from the HRRR, showers and storms
coming off the higher terrain of eastern Kentucky and West
Virginia have been unable to hold themselves together as they move
NNW toward the ILN forecast area. Outside of one or two light
showers, the whole CWA has been dry tonight. With the loss of
daytime heating, this trend is unlikely to change, and a
generally dry forecast will be maintained through the overnight
period. A slight chance of a shower will remain in place in the
Portsmouth area for the next few hours.

There is a fairly wide range in dewpoints this evening. Some
valley locations (such as KLUK and KPMH) are in the upper 60s to
lower 70s. In western and central Ohio, dewpoints range from the
upper 50s to mid 60s. Where boundary layer moisture remains fairly
high, min temps will be more mild, and may remain as high as the
upper 60s to around 70 degrees (a slight increase from the
previous forecast). 18Z NAM/GFS runs were not in good agreement
with current obs on T/Td, so the HRRR was used as a primary basis
for the forecast update.

Previous Discussion >
Convection across the fa remains fairly capped as some drier mid
level air has worked into the region. An isolated shower did pop
up in Scioto County, so isolated convection is possible late this
afternoon.

As for the the rest of the night. Several of the
models, especially the convective allowing models are showing the
the orographic convection in WV and ern KY drifting n this evening
and possibly affecting the se portions of the fa. Carried a 20 PoP
between 00-06Z to cover this possibility. As for the rest of the
fa, went dry this evening as the best lift remains w of the fa.

Low temperatures tonight will be in the mid to upper 60s.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH SUNDAY NIGHT/...
On Saturday, the H5 ridge over the ern U.S. continues to protect
the region a little. The best lift will remain out over the plains
and MS valley in the vicinity of the H5 trof/low. Lowered PoPs
for tomorrow down to 30 percent as the lift looks disorganized,
but some weak vorticity lifting ewd should help pop some
convection.

Convection should die down again Saturday Night. By Sunday, some
moisture and energy from subtropical low that came onshore in the
Carolina`s will affect the region. This will interact with the
ejecting H5 s/w in the upper MS valley, to kick off some more
scattered thunderstorms. Still kept PoPs in the 30 percent range
however.

Temperatures over the weekend will see highs in the lower to mid
80s. lows Saturday night will be in the mid to upper 60s again,
before cooing to the lower to mid 60s Sunday night.

&&

.LONG TERM /MONDAY THROUGH FRIDAY/...
Dry weather appears to be in store for Monday when weak surface high
pressure is forecast to develop under a flattened upper ridge. The
dry conditions are expected to persist through Tuesday as the
surface high travels slowly eastward on a weak westerly flow aloft.

Look for a transition to a more unsettled period starting Wednesday
when the upper flow backs to southwest, carrying a plume of moisture
to the Ohio Valley ahead of a surface cold front. Went with lower
chances for thunderstorms Wednesday, increasing on Thursday when the
cold front and associated convergence and lift may be crossing the
region from the west. A few thunderstorms may linger into Friday in
decreasing moisture and forcing behind the front.

Temperatures are forecast to stay about 5 to 10 degrees above normal
Monday through Thursday in the persistent southerly flow between
surface high pressure and the cold front. Readings may slide a few
degrees Friday in weak cold advection behind the front, with highs
still close to 80.

&&

.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
A few showers are situated southwest of the TAF sites this
morning. They will be slow moving and do not expect them to make
it into the TAF sites overnight.

Even with some of the cloud cover VSBYS at KLUK have started to
drop. Expect river valley fog to continue to develop overnight
however do not expect it to be as extensive as last night due to
more cloud cover.

Scattered light shower activity will work into the TAF sites
during the daytime morning hours and into the early afternoon
hours. There is some instability across primarily the eastern TAF
sites this afternoon and therefore have a VCTS mention in at
KILN...KCMH...and KLCK. Shower and thunderstorm activity will
begin to dissipate this evening leaving mostly just some mid and
high clouds around the area.

OUTLOOK...Showers and thunderstorms will be possible again on
Sunday. There will also be a chance of showers and thunderstorms
on Wednesday.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...None.
KY...None.
IN...None.

&&

$$
SYNOPSIS...Sites
NEAR TERM...Hatzos/Sites
SHORT TERM...Sites
LONG TERM...Coniglio
AVIATION...Novak


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.