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The Ides of March end of Winter 2023


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1 minute ago, Bubbler86 said:

We have had short spurts of sports all winter, not my intention to devolve.   Buc's looked exciting last night so a congrats more than anything. 

They’re certainly looking like they are headed in the right direction, but I’ve said that far too many times in the last 30 years.

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Especially considering both the strength of the tornado and this area not really rehearsed in F3 preparations. 
And the people are idiots. I, 19-year-old weenie ran outside with a co-worker to see what we could see and somebody else said something about trying to use the Kissing tower. Both should have gotten sucked up.

Sent from my motorola edge 5G UW (2021) using Tapatalk

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Yoda posted the Sterling AFD Severe discussion in the MA thread.  Canderson may have to live vicariously on this one.

 

 

SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/...
A lead wave ahead of a frontal system over the Ohio River Valley
will approach the area late Wednesday. Ridging will crest over
the area before heights begin to fall by Wednesday night. Given
the increasingly warm and unstable airmass, as well as some
added lift from terrain and the approach system to the west, a
few thunderstorms could develop mainly west of the Blue Ridge
late Wednesday afternoon into Wednesday night. Sufficient shear
will be present for storm organization, so a couple of strong to
severe thunderstorms can`t be ruled out.

The frontal system is set to cross the region on Thursday.
Cooling air moving in aloft above unseasonably warm and moist
air near the surface will likely result in moderate instability.
This coupled with moderately strong shear and forcing along the
approaching front should result in widespread showers and
thunderstorms, some of which could become capable of producing
severe weather in the form of damaging wind gusts and large
hail. Tornado potential is a bit more uncertain given relatively
weaker flow closer to the surface, but there is enough shear for
supercells. Also, any boundary interactions (terrain/bay/river
breeze circulations) could enhance this activity.

Temperatures will be very warm with highs well into the 80s and
lows in the 60s to around 70 east of the mountains Wednesday
into Thursday, 20 to 30 degrees above normal and more akin to
summer than spring. Temperatures will take a tumble Thursday
night behind the front.
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On 4/1/2023 at 5:21 PM, canderson said:

Hey @MAG5035 you ok? Altoona was knocked out. 

Yea I was okay in my immediate neighborhood. Main issues seemed to come from the initial arrival of that line and damage here was more sporadic like a typical severe outbreak. The two most significant wind damage incidents noted in and around town was a portion of a bowling alley’s roof blew off and took out lines and hit a house across the street and also a metal roof getting peeled off off another warehouse type building north of Altoona in Bellwood. 

https://www.altoonamirror.com/news/local-news/2023/04/wind-causes-modest-damage/

The large scale wind event aspect of that storm system was definitely not all that noteworthy here, the highest gust i registered on my weather station was only 34mph. 

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1 hour ago, Bubbler86 said:

Now is his time to gloat about the Buc's win last night. 

 

1 hour ago, TimB said:

You are not going to use me as a pawn to devolve this place into sports talk. :lol:

 

Me either, because I won't talk about sports on here.

 

But yeah...I do have Oneil Cruz on my fantasy team. :) 

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1 minute ago, Mount Joy Snowman said:

Anyone know anything about this new "RRFS A" model that has appeared on Pivotal?  Seems to run every three hours and goes out to 18 hours.  This note is included: The RRFS A is a prototype NOAA run. It will post as available, and is subject to outages that may be frequent and extended.

https://gsl.noaa.gov/focus-areas/unified_forecast_system/rrfs

Rapid Refresh Forecast System

GSL, NCEP/EMC, and other partners are working together on a project to design a single-model, convection-allowing, ensemble-based data assimilation, and forecasting system called the Rapid Refresh Forecast System (RRFS). This project aims to develop advanced high-resolution data-assimilation techniques and ensemble-forecasting methods while supporting the unification and simplification of the NCEP modeling suite around the FV3 model.

Within the NOAA model unification effort, the RRFS represents the evolution of the NAM, RAP, HRRR, and HREF systems to a new unified deterministic and ensemble storm-scale system. This new system is targeted for initial operational implementation in late 2023 as a planned replacement for the NAMnest, HRRR, HiResWindows, and HREF. While the standalone regional (SAR) FV3 model is being developed for convection-allowing forecasting of a limited area (CONUS), other possible components of the RRFS are being tested now in the experimental, WRF-based High-Resolution Rapid Refresh Ensemble (HRRRE). Experimental runs of the HRRRE at GSL are focused particularly on:

  • Improving 0-12 h high-resolution forecasts through ensemble-based, multi-scale data assimilation
  • Producing spread in 0-36 h ensemble forecasts through initial-condition perturbations, boundary-condition perturbations, and stochastic physics.

 

 

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I really thought this would have warranted a high risk by the afternoon only because of timing. I sure
hope the spc dose not regret not upgrading tomorrow morning. Better to cry wolf in this situation 
I would think.

...ArkLaTex into southern MO/IL Tonight...
   By early evening, forecast soundings from most 12z guidance shows
   that a broad area of high conditional risk of tornadic supercells
   will develop from eastern OK into much of AR and southern MO.  This
   area will still be somewhat capped and the mechanisms for convective
   initiation are uncertain.  However, a consensus of guidance shows
   multiple clusters of supercells forming across this area and
   persisting through the evening.  Wind fields will strengthen
   throughout the night and capping will weaken, leading to a serious
   concern for nocturnal tornadoes over the southern MDT risk area in
   MO/AR.  Again, model guidance provides confidence in the risk of
   widely scattered supercells throughout the night across the area,
   although details of location and timing are uncertain.  Strong or
   even violent tornadoes are possible in this scenario
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