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February 13, 2021 Ice Storm Obs


WxUSAF
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4 minutes ago, Wetbulbs88 said:

So much contradicting commentary on the PBP lol

Lol! I’d say the NAM pretty much held serve. Roughly .2 of qpf at 12z with maybe .16 at 18z. The 3k is a lot wetter though... it had no precip within 50 miles of dc in the 12z run. Goalposts prob narrowing but each model now shows between .15 and .4 of sleet/freezing rain falling with temps between 26 and 29.

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NAM and NAM nest do have a bit more precip arriving during Saturday, but it's mostly sleet until later the day.   At that point, it turns to freezing rain, and there is nice slug of it in the nest over southern MD, but the precip field everywhere becomes pretty sparse by 00z.     (Worth noting that the 12z NAMs were highlighting the period later Saturday night for the best ice threat.   We will see if 18z continues to have heavier precip during that period)

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Ice storm warning on NWS radio.

URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
310 PM EST Fri Feb 12 2021

MDZ016-017-VAZ050-055>057-130415-
/O.UPG.KLWX.WS.A.0006.210213T1200Z-210214T1200Z/
/O.NEW.KLWX.IS.W.0001.210213T1200Z-210214T1200Z/
Charles-St. Marys-Orange-Stafford-Spotsylvania-King George-
310 PM EST Fri Feb 12 2021

...ICE STORM WARNING IN EFFECT FROM 7 AM SATURDAY TO 7 AM EST
SUNDAY...

* WHAT...Significant icing. Storm total ice accumulations of
  around a quarter of an inch.

* WHERE...Portions of southern Maryland and north-central
  Virginia.

* WHEN...From 7 AM Saturday to 7 AM EST Sunday.
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3 minutes ago, ovechkin said:
2 minutes ago, Grothar of Herndon said:

Looks like a non-storm for our area. Same pattern we have seen for most of the winter and especially the past few weeks. I think it is time we join @BristowWx  with our favorite beverage and FORGITABOUTIT!!

I think this will actually be the most impactful event in dc so far this winter. Not saying much...

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URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
310 PM EST Fri Feb 12 2021

Nelson-Albemarle-Central Virginia Blue Ridge-
310 PM EST Fri Feb 12 2021

...WINTER STORM WARNING IN EFFECT FROM 7 AM SATURDAY TO 7 AM EST
SUNDAY...

* WHAT...Significant icing. Total ice accumulations of around a
  quarter of an inch.

* WHERE...Nelson and Albemarle Counties, and Central Virginia
  Blue Ridge.

* WHEN...From 7 AM Saturday to 7 AM EST Sunday.
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Winter Weather Advisory for everyone else Montgomery County S and E

 

URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
310 PM EST Fri Feb 12 2021

DCZ001-MDZ013-014-018-VAZ038-039-051>054-502-130415-
/O.UPG.KLWX.WS.A.0006.210213T1200Z-210214T1200Z/
/O.NEW.KLWX.WW.Y.0011.210213T1500Z-210214T1200Z/
District of Columbia-Prince Georges-Anne Arundel-Calvert-Greene-
Madison-Culpeper-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Southern Fauquier-
310 PM EST Fri Feb 12 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 7 AM
EST SUNDAY...

* WHAT...Freezing rain, mixed with sleet at times. Storm total
  ice accumulations of one tenth to two tenths of an inch.

* WHERE...The District of Columbia, and portions of central and
  southern Maryland and central, northern and northwest Virginia.

* WHEN...From 10 AM Saturday to 7 AM EST Sunday.

* IMPACTS...Prepare for difficult travel conditions.

* ADDITIONAL DETAILS...Even a small amount of ice on untreated
  surfaces can make travel treacherous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible
power outages.

When venturing outside, watch your first few steps taken on
steps, sidewalks, and driveways, which could be icy and slippery,
increasing your risk of a fall and injury.
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2 minutes ago, stormtracker said:

Winter Weather Advisory for everyone else Montgomery County S and E

 


URGENT - WINTER WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
310 PM EST Fri Feb 12 2021

DCZ001-MDZ013-014-018-VAZ038-039-051>054-502-130415-
/O.UPG.KLWX.WS.A.0006.210213T1200Z-210214T1200Z/
/O.NEW.KLWX.WW.Y.0011.210213T1500Z-210214T1200Z/
District of Columbia-Prince Georges-Anne Arundel-Calvert-Greene-
Madison-Culpeper-Prince William/Manassas/Manassas Park-Fairfax-
Arlington/Falls Church/Alexandria-Southern Fauquier-
310 PM EST Fri Feb 12 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 7 AM
EST SUNDAY...

* WHAT...Freezing rain, mixed with sleet at times. Storm total
  ice accumulations of one tenth to two tenths of an inch.

* WHERE...The District of Columbia, and portions of central and
  southern Maryland and central, northern and northwest Virginia.

* WHEN...From 10 AM Saturday to 7 AM EST Sunday.

* IMPACTS...Prepare for difficult travel conditions.

* ADDITIONAL DETAILS...Even a small amount of ice on untreated
  surfaces can make travel treacherous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible
power outages.

When venturing outside, watch your first few steps taken on
steps, sidewalks, and driveways, which could be icy and slippery,
increasing your risk of a fall and injury.

Eexcept for the ISW in S MD and EZF area 

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