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October Discobs 2019


George BM
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8 minutes ago, Kmlwx said:

VERY strong wording from LWX. Their headline in the short term portion of the AFD is 


A potentially dangerous weather event is unfolding for Thursday

Guess you are in? ;)

Rest of disco sounds... scary for Halloween 

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
A potentially dangerous weather event is unfolding for Thursday.

A strengthening mid/upper low will deepen and take on a negative
tilt (trough axis extending from northwest to southeast) as it
approaches the area by nightfall Thursday. Meanwhile, a surface
low with origins over the northern Gulf Coast and lower
Mississippi River Valley will strengthen as it moves
northeastward into the upper Ohio River Valley and eastern Great
Lakes. As the low deepens, it will move around stubborn ridging
off the southeast coast of the United States. The pressure
gradient between these two system will result in a very strong
low-level jet (up to 75 MPH 5000 feet above ground level). This
jet will continue to advect an anomalously warm and humid
airmass into the region, with PWATs of 1.75-2.00 inches (see
Hydrology Section below for more details).

The warm and humid airmass will lead to increasingly unstable
conditions despite the abundant cloud cover, lower sun angle and
lack of appreciable surface heating (at least in the traditional
sense). High temperatures into the mid 70s and dew points
approaching 70 will result in 500-1000 J/kg of MLCAPE by evening
immediately ahead of a very strong cold front approaching from
the west. As the aforementioned low pulls northeastward into
Canada, its trailing cold front will plow through the Mid-
Atlantic during the evening, accompanied by a band of showers
and embedded thunderstorms with the potential to produce heavy
rainfall and damaging wind gusts. SPC has placed much of the
region in an Enhanced Risk (the third highest in a five level
scale denoting severe weather risk). The main threats are
damaging straight-line wind gusts aided by the strong low-level
jet and pressure surge (rises of nearly 10 mb in 3 hours) along
the front. A secondary threat is heavy rainfall and tornadoes
given the high humidity and strong, veering low-level flow.

Everyone should make sure they have a way to receive warnings
and get to shelter quickly should severe weather threaten your
neighborhood tomorrow evening.

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9 minutes ago, Kmlwx said:

VERY strong wording from LWX. Their headline in the short term portion of the AFD is 


A potentially dangerous weather event is unfolding for Thursday

they worried about tornadoes? otherwise, looks like a typical frontal pass to me with a robust line out ahead of it. 

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Just now, yoda said:

Sounds like it even though its a secondary threat as they state in the AFD... i posted the rest of it above just before your post

I read it. doesn't sound super crazy to me. i mean yeah its a strong front, but "potentially dangerous"? 

probably just wording it that way because its halloween and the line is expected to come through during prime trick or treating. 

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Just now, mappy said:

I read it. doesn't sound super crazy to me. i mean yeah its a strong front, but "potentially dangerous"? 

probably just wording it that way because its halloween and the line is expected to come through during prime trick or treating. 

The alluding to Halloween portion of the disco:

 

"Everyone should make sure they have a way to receive warnings
and get to shelter quickly should severe weather threaten your
neighborhood tomorrow evening."
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Just now, George BM said:

The alluding to Halloween portion of the disco:

 


"Everyone should make sure they have a way to receive warnings
and get to shelter quickly should severe weather threaten your
neighborhood tomorrow evening."

everyone should make sure they have ways to receive warnings regardless of when and what day it is. 

my comment was about the "potentially dangerous" part, at the time of the AFD. I personally don't see it being potentially dangerous minus a QLCS tornado or two. 

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Just now, mappy said:

everyone should make sure they have ways to receive warnings regardless of when and what day it is. 

my comment was about the "potentially dangerous" part, at the time of the AFD. I personally don't see it being potentially dangerous minus a QLCS tornado or two. 

@mappy - WOW SO JUDGEY. ALL TORNADOES ARE DANGEROUS. How dare you undermine QLCS cutie tornadoes. 

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Just now, Kmlwx said:

@yoda - I'm in for "interesting weather" other than what we've been getting lately with just sun or rain. I'm *not* in for a widespread damaging event. LWX in typical fashion will find a way to issue 30+ SVRs tomorrow though (I kid in good fun) :lol: 

I believe @Eskimo Joe already called for a tornado watch tomorrow :lol:

Wonder when the last time we have had a tornado watch issued for the LWX CWA in October or later... will have to look in the SPC archives after work

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5 minutes ago, yoda said:

I believe @Eskimo Joe already called for a tornado watch tomorrow :lol:

Wonder when the last time we have had a tornado watch issued for the LWX CWA in October or later... will have to look in the SPC archives after work

Here is one... October 27th, 2010 -- https://www.spc.noaa.gov/exper/archive/event.php?date=20101027

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Here are the others I found on the SPC archive for Tornado Watches covering any part of the LWX CWA from November:

https://www.spc.noaa.gov/exper/archive/event.php?date=20101130  (November 30th, 2010 and went into Dec 1, 2010 as a Tornado Watch was issued for the DC metro at 3:45am on Dec 1st)

https://www.spc.noaa.gov/exper/archive/event.php?date=20101116  (Nov 16 2010)

https://www.spc.noaa.gov/exper/archive/event.php?date=20061116 (Nov 16, 2006 -- in addition 1630 Day 1 OTLK had the ultra rare hatched TOR for i95 corridor including DC/BALT metros... along with the mention for isolated but potentially strong tornadoes in the 1630 SPC disco)

https://www.spc.noaa.gov/exper/archive/event.php?date=20021110 (Nov 11, 2002)

 

Looks like only one for December:

https://www.spc.noaa.gov/exper/archive/event.php?date=20001216 (Dec 16, 2000)

 

The archive only goes back to 2000 though... so I am sure there were others before 2000 that had tornado watches for any portion of the LWX CWA

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2 hours ago, Kmlwx said:

VERY strong wording from LWX. Their headline in the short term portion of the AFD is 


A potentially dangerous weather event is unfolding for Thursday

<EJ> Kids need to toughen up. If today’s helicopter, snowflake parents can’t let their kids handle a little rain then there’s no hope for them. </EJ>

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