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January 5-7, 2024 | Winter Storm Potential


MesoscaleBanding

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12 minutes ago, Wnwniner said:

Planning our snow response for the weekend-pavement temps seem to be marginal from what i can tell.  Does the (much much smarter than me) hive mind agree for central Ohio?

No clue how pavement temps vary. Air temps look to hover around 30-32 for Columbus until around 18z tomorrow then 33ish? Like you said, marginal seems good lol.

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Just now, cperry29 said:

No clue how pavement temps vary. Air temps look to hover around 30-32 for Columbus until around 18z tomorrow then 33ish? Like you said, marginal seems good lol.

yea thinking we'll need to plan to salt everything, and scale back from there.

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I'll be outa the office soon so will not be here much if at all.  RGEM says we have been NAM'd. Hopefully this is not the case with later model runs.

 

Peace!

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44 minutes ago, RobB said:

I'll be outa the office soon so will not be here much if at all.  RGEM says we have been NAM'd. Hopefully this is not the case with later model runs.

 

Peace!

 

40 minutes ago, cperry29 said:

3-5 degrees difference in temps between RGEM and NAMs depending on location. Dunno which is right/wrong. 

typically I would error on the side of caution but the other hi-res models more back the NAM over the RGEM, but last year the RGEM was the unprecedented over performer above other short range models

Edited by Ohiobuckeye45
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Wow NAM sure making things interesting around here. ILN taking notice and saying a WWA is possible.

Quote
Snow forecast updates will arrive later today...
Recent trends in the guidance are pointing toward higher QPF
over locations along and southeast of the I-71 corridor.
Potential is certainly increasing for a focused area of
accumulating snow 1-2" (locally higher amounts) across southern
Ohio and northern Kentucky Saturday morning. Precipitation type
and surface temperatures with heavier precipitation rates tend
to remain as snow with lower surface temperatures, especially
with the onset of precipitation occurring before sunrise. Wet,
sticky dendrites would be capable of accumulating quickly, as
long as precipitation rates remain moderate. An advisory is
being considered for portions of northern Kentucky and southern
Ohio, with accumulating snow potentially leading to travel
impacts Saturday morning.

 

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Not expecting bad roads since it’s quite marginal. Shouldn’t have too much of an issue accumulating on colder surfaces though but that’s if it’s heavy enough initially so we’ll see. 

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  • Meteorologist

Measured about 4.5" here. Seems like that snowband got a little further north than some of the models thought. Still have more snow coming up this way as well. 

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12 minutes ago, cperry29 said:

Get your snow brooms ready. We may have some snow to dust tomorrow in Ohio.

IMG_1739.jpeg

They are updating this later with higher amounts and possible WWA.

Quote
Snow forecast updates will arrive later today...
Recent trends in the guidance are pointing toward higher QPF
over locations along and southeast of the I-71 corridor.
Potential is certainly increasing for a focused area of
accumulating snow 1-2" (locally higher amounts) across southern
Ohio and northern Kentucky Saturday morning. Precipitation type
and surface temperatures with heavier precipitation rates tend
to remain as snow with lower surface temperatures, especially
with the onset of precipitation occurring before sunrise. Wet,
sticky dendrites would be capable of accumulating quickly, as
long as precipitation rates remain moderate. An advisory is
being considered for portions of northern Kentucky and southern
Ohio, with accumulating snow potentially leading to travel
impacts Saturday morning.

 

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ILN update.

Quote
.NEAR TERM /THROUGH TONIGHT/...
Updated due to increase in snowfall amounts. Full AFD will be
issued at normal time.

Surface high pressure continues to shift east through the rest
of the afternoon and into the evening. Winds remain light and
out of the east and upper level clouds stream in from the
southwest. These clouds are advecting into the region from a
potent shortwave ejecting out of the Southern Plains. Dry air
ahead of this system likely prevents precipitation onset until
after midnight.

Onset: As precipitation moves into the area, it will be entering
a very dry air mass with above freezing temperatures above the
surface. Some above freezing temperatures are forecast along and
south of the Ohio River. With the dry air in place, evaporative
cooling will take place as precipitation falls. As this process
occurs, some mixed precipitation is possible (partially melted
snowflakes or ice pellets) during the transition to saturation.
Some rain is also possible across the south. Eventually,
precipitation rates and favorable timing will help to allow for
a mostly full transition to snow by the end near term period.
More details on the snow accumulation in the short term period.

&&

.SHORT TERM /SATURDAY THROUGH 6PM Saturday/...
Adjustments were made to the previous forecast given the trends
in the 06/12Z guidance. Complex scenario results in a lower
than desired confidence for this event, but confidence had
increased enough to ramp totals up across the area for this
early afternoon update. The new snowfall amounts are sensitive
to several factors lining up, and there is a possibility for
values to trend lower/higher as confidence increases.

Snow amounts: Snow total forecast was made using the assumption
of higher snowfall rates and higher QPF, leading to a few hours
of accumulating snow. These higher snowfall rates will help to
increase snow ratios as wet flakes fall and quickly stack up.
Given this event will unfold in around 6-10 hours, any
transition to rain will greatly diminish snowfall amounts along
the Ohio River and into southern Ohio. Snowfall rates will also
help to decrease the potential for warm air advection to
disrupt the below freezing temperatures in the lower
troposphere. The highest amounts (2" with locally higher amounts)
are currently stretched across portions of northern Kentucky
into the middle Scioto Valley (Ross County).

Timing: While some snow is possible during the early morning
hours across the tri-state and northern Kentucky, the best
snowfall rates are expected between 6 am and noon, stretching
from northern Kentucky toward the Scioto Valley. This is the
corridor of highest snowfall amounts (2" with locally higher
amounts). Precipitation rates quickly decrease through the early
afternoon and thermal profiles become less supportive of
efficient accumulating snow.

 

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