Area Forecast Discussion Issued by NWS Wakefield, VA
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000
FXUS61 KAKQ 162359
AFDAKQ
Area Forecast Discussion
National Weather Service Wakefield VA
759 PM EDT Mon Apr 16 2018
.SYNOPSIS...
Dry...cool weather expected Tue then warmer mid week as high
pressure slides by to our south. Gusty west winds will accompany
a cold front crossing the region Thursday.
&&
.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
Deep/anomalous upper level lo pres will be tracking E from the
Great Lakes into New England tonight. An initial s/w in the
broad WNW flow aloft will be exiting the coast this evening. A
secondary system aloft will follow by late tonight. Expect
periods of BKN CIGS overnight. W winds remain gusty to 20-30 mph
(early) this evening then drop off (but do not fully decouple).
Winds to begin picking back up around/shortly after sunrise Tue.
Lows tonight in the m-u30s central/W (though expecting enough
mixing/clouds and fall in dew points into the 20s to prevent
frost development)...to around 40F E.
&&
.SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/...
Primarily W winds (gusty to 20-25 kt) and cool/dry conditions
Tue. Winds shift back to SW by Wed ahead of low pres diving ESE
into the OH Valley. Highs Tue in the mid 50s-around 60F. Lows
Tue night from the m-u30s NNW (sfc dew point depressions 5-10F
may prevent frost) to the 40-45F S. Highs Wed from the l-m60s
on the Ern Shore to the u60s-m70s in central VA to SE VA-NE NC.
Potent s/w aloft tracks by just N of the FA late Wed night-Thu
morning...w/ a cold front (moisture starved) pushing quickly E
through the local area. Expected development of gusty W winds
Thu along w/ a substantial push of dry air (by afternoon) into
the region. Far NNE areas of the FA may be brushed by BKN clouds
and isold SHRAS. Lows Wed night in the u40s-l50s N to the m50s
S. Highs Thu from the l-m60s on the Ern Shore to the u60s- m70s
in central VA to SE VA-NE NC.
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.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
Below normal temperatures are expected through the extended
portion of the forecast. NW flow aloft maintains dry/cooler wx
will prevail for Thu-Sat. Lo pres will be exiting the central
Plains Sat...tracking E and approaches the (lower) mid-
Atlantic/SE states Sun-Mon...resulting in increasing clouds and
20-30% PoPs. Some drying from the N anticipated attm during
next Mon.
Lows Thu night in the u30s NW to the m40s SE. Highs Fri in the
m-u50s E to around 60F W. Lows Fri night from the u30s NW to
the l-m40s elsewhere. Highs Sat in the m50s at the coast to
60-65F inland. Lows Sat night ranging through 40s. Highs Sun
from the u50 N to l60s S. Highs Mon mainly 60-65F.
&&
.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
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Mostly VFR conditions over the region with mid and high clouds
still prominent. Big low pressure system over the NE U.S. will
continue to rotate northward. A few very light showers or
sprinkles persist over northern parts of the CWA and over the
Eastern Shore. Some clearing is expected during the overnight
but more mid level clouds will move into the area late morning
into the afternoon. Conditions will remain VFR during the TAF
period. W-WNW winds will diminish some tonight but will again
become gusty 20-30 kt Tuesday from late morning through the
afternoon.
Outlook: VFR through Wed. A cold front will cross the region
Thu accompanied by BKN (VFR) CIGS and gusty WNW winds.-- End Changed Discussion --
&&
.MARINE...
Have dropped the SCA`s briefly over the middle and northern Bay
in addition to the York and Rappahannock rivers. Pressure
gradient has been loosening up this afternoon however guidance
suggests a surge of cool air will push winds back up to 15 kt
with up to 20 kt across the lower Ches bay and mouth of the Bay
overnight. SCAs may need to be raised again for the middle and
upper Bay for the overnight / early Tuesday morning hours. Seas
remain elevated over the coastal waters running 9 to 10 ft off
Fenwick Island and 7 to 8 ft off Chincoteague in a combined
swell and wind wave. Seas will slowly decease overnight but
remain above 5 ft. Minimal SCA`s (W/NW 15-20 kt) early Tue with
the deep low lingering over eastern Canada and high pressure to
the west.
Pres gradient may relax some Tuesday night, but WSW winds Wed
increase again ahead of the next front that crosses the waters
shifting the winds to the NW Wed night. Behind the strong strong
NW winds persist. In general SCA conditions may persist through
much of this week with just a brief lull.
&&
.TIDES/COASTAL FLOODING...
The sustained S-SE wind of 20-30 kt is resulting in tidal anomalies
approaching 1.5ft above normal attm. Went ahead and issued a coastal
flood advisory for Bishops Head for the afternoon high tide as a wind
shift to WSW today will likely push water into estuaries along the
bay side of the MD Ern Shore where some minor flooding is expected.
Held off on any advisories at OXB as the water level there expected
to come in at 3.9 ft, just under the 4.0 foot minor flooding threshold.
&&
.AKQ WATCHES/WARNINGS/ADVISORIES...
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MD...Coastal Flood Advisory until 8 AM EDT Tuesday for MDZ021-023.
NC...None.
VA...Coastal Flood Advisory until 8 AM EDT Tuesday for VAZ075-077.
MARINE...Small Craft Advisory until 4 PM EDT Tuesday for ANZ632-634-636-
638-650-652.
Small Craft Advisory until 9 AM EDT Tuesday for ANZ654-656-658.-- End Changed Discussion --
&&
$$
SYNOPSIS...ALB/JDM
NEAR TERM...ALB
SHORT TERM...ALB/JDM
LONG TERM...ALB
AVIATION...ALB
MARINE...MPR/JAO
TIDES/COASTAL FLOODING...