Area Forecast Discussion
Issued by NWS Sterling, VA

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FXUS61 KLWX 240825

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
425 AM EDT Tue Oct 24 2017

A cold front will move across the area late tonight and push
east of the Chesapeake Bay Tuesday morning. High pressure will
gradually build across the region during the second half of the



Personal note - after 33 years in government and 23 years at LWX
I`m calling it a day. It`s been a great honor to serve my
country. Thank you.

And a very wild end to the ride it`s been on this overnight
shift. I suppose there are records on it, but I doubt there have
been too many Oct 24s that have featured 70 dewpoints at 2 am.
This is more like what youd see in late July. But over the past
two hours some of this moisture has been wrung out as the cold
front is now crossing the I-95 corridor.

Behind the boundary the wind advisory is becoming suspect. IAD
VWP has dropped off in the lowest 2,000 feet during the past

The band of precipitation may be slow to clear the Bay and will
hold onto at least PoPs until late afternoon.

This will be the final day of well above average temperatures
with highs in the 70s.



Upper trough axis crosses the area Wed (GFS) or Wed night
(ECMWF) with temps staying in the 60s during the day and 40s at
night. Any precip would be confined to the upslope areas.


Troughing will remain entrenched over the eastern CONUS through the
period as ridging persists out west and over the North Atlantic.
This will lead to near normal temperatures late this week into the
weekend. A spoke of energy will rotate around an upper low stationed
just southwest of James Bay likely bringing another period of
unsettled weather at some point next weekend, but timing/placement
details remain fuzzy this far out.



IFR/MVFR ceilings at the major sites early this morning will see
improvement as the morning progresses. Then VFR tonight.

Mainly VFR expected late in the week with light flow.



We are seeing Gale level gusts on the Bay. This will be in
effect for the widest portion of the MD section of the Bay until
3 pm, further north until 8 am. Then SCA everywhere for the
remainder of the day.

Light flow with high pressure over the waters Thu-Fri.


Waters are running above normal on southerly flow. Advisories
are in effect along the western shore of the Bay thorugh midday.


MD...Wind Advisory until 6 AM EDT early this morning for MDZ004>006-
     Coastal Flood Advisory until 10 AM EDT this morning for MDZ017.
     Coastal Flood Advisory until 11 AM EDT this morning for MDZ018.
     Coastal Flood Advisory until 1 PM EDT this afternoon for
     Coastal Flood Advisory until 2 PM EDT this afternoon for
VA...Wind Advisory until 6 AM EDT early this morning for VAZ037>040-
MARINE...Gale Warning until 8 AM EDT this morning for ANZ530>533-
     Small Craft Advisory from 8 AM this morning to 6 PM EDT this
     evening for ANZ530>533-537>542.
     Gale Warning until 3 PM EDT this afternoon for ANZ534-543.


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