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January 3, 2022 CAPE Storm Obs/Nowcast


WxUSAF
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6 minutes ago, Dabuckeyes said:

I just want to know….is the 3K NAM an improvement 

South of I-70 get accumulating snow. South of I-66 to US 50 gets warning level snow. It's an improvement for these locations. Good luck north of there, at least the Canadian/Euro/GFS have snow north to Mason-Dixon.

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12 minutes ago, SnowenOutThere said:

Watching the water vapor loop and when should the tilt become negative if we want a snowy outcome? Currently looks mainly neutral if not a bit positive still. 

ninjaed 

I think a good rule of thumb that is it should be at least neutral leaning towards negative over the mouth of the Mississippi.  

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Blend the GFS and the Euro. Toss the ICON (always toss the ICON) The NAM is that voice in the back of your head, and the other models are noise. Call school and extend my winter break. Number two reason I became a teacher, winter break that is. Snow days are number three. Spring break four. Yeah you get it. We don't do anything. 60 in Vienna and warm af. People really go to college for this sh**t?

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:o

 

National Weather Service Baltimore MD/Washington DC
339 PM EST Sun Jan 2 2022

.SYNOPSIS...
A cold front will cross the region this evening, with low
pressure then moving northeastward along the front late tonight
into Monday. High pressure will return Tuesday before a weak
system passes east Tuesday night. High pressure will return
Wednesday before another system threatens for Thursday night and
Friday.

&&

.NEAR TERM /THROUGH MONDAY/...
Latest analysis shows cold front across western Maryland and
eastern West Virginia, sliding southeast across the region. To
the south, low pressure is organizing over Alabama and Georgia
and will be riding northeast across the Carolinas tonight and
off the coast Monday.

A few showers will cross the region this evening as the cold
front crosses the area. Temps will fall rapidly behind the
front. Quick on its heals, the low pressure will begin to spread
precipitation northeastward across the region starting late this
evening and continuing into the early morning. Guidance has come
into better agreement and has trended significantly further
northwest, so have increased snowfall totals and expanded
warnings and advisories. Will be continually reviewing latest
guidance this evening given still significantly discrepancies
between model guidance, as well as great potential for a very
sharp northwestern cut-off with some models showing a range from
nothing to 6 inches within just a dozen miles or so. Great
concern exists regarding potential for an intense FGEN band
developing close to the metro early Monday which could drop 1-3
inch snowfall rates across the region. At this time, best odds
favor locales just southeast, but potential does exist for
upwards of a foot somewhere in our CWA. Nailing that location
down is the hard part.

Storm system looks a little slower so did extend some warnings
into the mid-afternoon, with snow probably out of here by
evening rush hour. There may be enough sun late in the day to
warm temps back above freezing for most, which presents a re-
freeze potential.
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3 minutes ago, MN Transplant said:

This a strange situation where it is 60 degrees within 12 hours of a snow event, and we want to make sure that the cold air doesn’t come in too aggressively and forces the baroclinic zone too far south.

Dude, I want that cold air down to the Loch Ness monster ride at BG.  I don't want to be sweating thermals AT ALL

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Just now, H2O said:

Where is the best linky for a map showing temps in color?  I should know this but my go to of NWS maps is lacking showing the cold air marching norther

Man I hope you get a good storm you're melting down a little. Between you and grandpa Munster it's a little awkward up in here.

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If you want to sweat the cold FROPA, the SPC mesoanalysis is good to follow:

https://www.spc.noaa.gov/exper/mesoanalysis/new/viewsector.php?sector=17#

Can choose either "Surface" or "Winter Weather" and see where the isotherms are packed to tell where the front is located.  Based on the wind shift, it's getting close to the metros in MD/DC and a  bit farther north in VA.

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