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October Discobs 2019


George BM
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4 hours ago, losetoa6 said:

I'll take what the Gfs and nam are serving  for Thurs ...they both keep the heat confined to Va . Showing upper 50s to lower 70s  for most of central Md . Euro has also bumped cooler with 70s most areas Thursday.  I take .

Lol ..overdone a smidge I'm sure but...

6z nam for Thurs 18z

 

Screenshot_20191001-055009_Chrome_crop_339x609.jpg

Yeah, the models really caught on to the back door possibilities yesterday.  Looks like Wednesday will be the last day of "summer" from DC N&E.  Richmond has to wait one more day.

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46 minutes ago, MN Transplant said:

Yeah, the models really caught on to the back door possibilities yesterday.  Looks like Wednesday will be the last day of "summer" from DC N&E.  Richmond has to wait one more day.

              Gonna be a fascinating temperature forecast for Thursday for sure.     It's pretty certain that Baltimore and points northeast will be cool, but I don't think it's as certain for DC metro.   12z NAM has low 90s in northern VA, with the gradient right along the Potomac.   NAM nest has the gradient ever so slightly to the east.

 

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Yay for tomorrow... the CF can't come soon enough :axe:

 

.SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/...
Surface high pressure will shift further southward on Wednesday
as a cold moves southward from the eastern Great Lakes and New
England. By the evening hours, the front will likely be positioned
from Ohio eastward to Pennsylvania and to New Jersey coastline.
Hot temperatures are expected across the area, especially with
downsloping southwesterly to westerly flow. Daily record high
temperatures are likely, with monthly October records possibly
in jeopardy. 925mb temperatures are modeled to be around 26-27C,
which supports widespread highs in the 90s, with low 90s west of
the Blue Ridge, and mid to perhaps upper 90s east, especially in
the Virginia piedmont.

The front will move southward and likely reach into northeast
Maryland Wednesday night. At the same time, an area of low
pressure will move eastward out of the Ohio Valley with the main
cold frontal push still hanging back in IN/IL. Mainly dry
conditions are expected Wednesday night, although some light
shower activity is possible along the frontal boundary near the
PA border. Lows Wednesday night will range through the 60s to
around 70F.

Low pressure will push northeastward through OH and into PA/NY
by late Thursday, with the main frontal boundary approaching the
Appalachians late in the day. However, all eyes will be on the
backdoor-esque front that will likely be bisecting the area
during the day, having a large impact on temperature outcome.
General model consensus places the front roughly from MRB-IAD-
NYG, but its possible this will end up further southwest or
further northeast. Highs will be in the 90s south/west of this
boundary, with low-mid 70s north/east. Widespread clouds and
some shower activity is possible on the cool side of the
boundary, and some shower/thunderstorm activity is possible as
the cold front moves towards the area in the evening.

The cold front will clear the region Thursday night with
significant cool and dry air advection. Lows by Friday morning
will fall into the 50s/60s.

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Everybody should be breaking records easily tomorrow... possibly even the all time record... 

.CLIMATE...
Significant record highs are possible on Wednesday. Here are
the records for October 2nd and for the entire month.

Site   Oct 2 record   All-time October record
DCA     89 in 1986        96 on 10/5/1941
BWI     89 in 1986        97 on 10/5/1941
IAD     89 in 1986        94 on 10/9/2007
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Heat records tomorrow in this area are probably safe.  Record for the date at Martinsburg is 98 from 1927; one of 3 consecutive high temp records from that year (92, 98, 92 on 10/1-3/1927). That 98 ties the hottest October reading at MRB with 10/6/1941, the first of 3 consecutive records from that year that still stand; 98, 93, 97 on 10/6-8/1941.

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7 minutes ago, losetoa6 said:

 

 

Happy hour Gfs follows suit with a cutoff low and crushes many areas day 7 -8. Man if we could get this look under 100  hours .

It will surely evaporate, like all the other chances for sig rain recently. Drought begets drought. Atmospheric memory. Or some shiit like that :P 

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