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January 22-23 Mid Atlantic Storm Thread #3 - No Banter


stormtracker

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Not that DC has to worry but is anyone worried about the NW trend in the 00z models tonight? I'm on eastern shore and it almost always mixes here anyway, but there was a big jump tonight NW. Hopefully just a wobble and not that pesky NW trend that occurs often leading up to the storm.

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Not that DC has to worry but is anyone worried about the NW trend in the 00z models tonight? I'm on eastern shore and it almost always mixes here anyway, but there was a big jump tonight NW. Hopefully just a wobble and not that pesky NW trend that occurs often leading up to the storm.

That last run of Nam went NW a good bit.

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LWX still onboard...

(snip)

. THERE IS A MILD CONCERN WITH TIMING OF ONSET. GFS IS SLIGHTLY SLOWER THAN THE

ECMWF HOWEVER...MODEL CONSENSUS SHOWS SNOW BEGINNING ACROSS

CENTRAL VIRGINIA FRIDAY MORNING MOVING NORTH AND EAST TO THE

WASHINGTON DC/BALTIMORE CORRIDOR BY LATE AFTERNOON/EARLY EVENING

ON FRIDAY.

(snip)

MOISTURE FIELDS IN MODEL GUIDANCE SHOW 2-2.5 INCHES OF LIQUID PRECIPITATION THROUGH SATURDAY NIGHT AND THIS COUPLED WITH 12 TO 1 RATIOS GIVE 1.5-2 FEET ACROSSUCH OF THE AREA. A WINTER STORM WATCH IS IN EFFECT FOR MUCH OF THE

AREA.

(snip)

SLEET IS POSSIBLE MAINLY ACROSS SOUTHERN MARYLAND BUT COULD STRETCH AS FAR

NORTH AS BALTIMORE/HARFORD COUNTIES. THIS WOULD HAMPER SNOWFALL

ACCUMULATIONS IN THIS AREA. THE HIGHER CONFIDENCE OF SLEET IS ACROSS

SOUTHERN MD AND STORM TOTALS REPRESENT THAT.

(snip)

THE LOW WILL FINALLY MOVE OFF THE COAST SATURDAY NIGHT AND SNOW

SHOULD GRADUALLY TAPER OFF DURING THIS TIME. ADDITIONAL SNOWFALL

ACCUMULATIONS ARE LIKELY BEFORE SNOWFALL ENDS. GUSTY WINDS ALONG

WITH BLOWING AND DRIFTING SNOW WILL CONTINUE OVERNIGHT.

 

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URGENT - WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

526 AM EST THU JAN 21 2016

DCZ001-MDZ004>006-011-013-014-016>018-503>508-VAZ052>057-505-506-

211830-

/O.CON.KLWX.BZ.A.0001.160122T1700Z-160124T1100Z/

DISTRICT OF COLUMBIA-FREDERICK MD-CARROLL-NORTHERN BALTIMORE-

SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-

CALVERT-NORTHWEST MONTGOMERY-CENTRAL AND SOUTHEAST MONTGOMERY-

NORTHWEST HOWARD-CENTRAL AND SOUTHEAST HOWARD-NORTHWEST HARFORD-

SOUTHEAST HARFORD-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-

ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-

KING GEORGE-WESTERN LOUDOUN-EASTERN LOUDOUN-

526 AM EST THU JAN 21 2016

...BLIZZARD WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH

LATE SATURDAY NIGHT...

* HAZARD TYPES...HEAVY SNOW AND WIND WITH BLOWING AND DRIFTING

SNOW FRIDAY AFTERNOON THROUGH SATURDAY NIGHT. SLEET MAY MIX

WITH THE SNOW FRIDAY NIGHT INTO SATURDAY MORNING EAST OF

INTERSTATE 95...BEFORE CHANGING BACK TO ALL SNOW BY SATURDAY

AFTERNOON.

* ACCUMULATIONS...SNOW ACCUMULATION OF 18 TO 24 INCHES.

* TIMING...HEAVY SNOW FRIDAY AFTERNOON THROUGH SATURDAY NIGHT.

CONDITIONS ARE EXPECTED TO DETERIORATE FRIDAY AFTERNOON WITH

THE HEAVIEST SNOW... STRONGEST WINDS...AND POTENTIAL LIFE

THREATENING CONDITIONS EXPECTED FRIDAY NIGHT THROUGH SATURDAY.

* IMPACTS...HEAVY SNOW AND BLOWING SNOW WILL CAUSE DANGEROUS

CONDITIONS AND WILL BE A THREAT TO LIFE AND PROPERTY. TRAVEL

IS EXPECTED TO BE SEVERELY LIMITED IF NOT IMPOSSIBLE DURING

THE HEIGHT OF THE STORM FRIDAY NIGHT AND SATURDAY. VISIBILITY

WILL BE REDUCED TO NEAR ZERO AT TIMES IN WHITEOUT CONDITIONS.

* WINDS...NORTHEAST 25 TO 35 MPH WITH GUSTS UP TO 55 MPH.

* TEMPERATURES...IN THE UPPER 20S.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR FRIDAY AND SATURDAY...A BLIZZARD WATCH MEANS SEVERE WINTER

WEATHER IS POSSIBLE. USE THIS ADVANCE NOTICE TO PLAN AHEAD!

ADJUST TRAVEL PLANS...AND PLANNED ACTIVITIES. STOCK UP ON

NECESSITIES. MAKE PLANS FOR ELDERLY FAMILY AND THOSE MOST AT

RISK. PREPARE FOR THE POSSIBILITY OF POWER OUTAGES DURING SNOWY

AND COLD CONDITIONS. USE THIS TIME TO MINIMIZE IMPACT ON YOU...

YOUR FAMILY...AND YOUR COMMUNITY.

A BLIZZARD WATCH MEANS THERE IS A POTENTIAL FOR FALLING AND/OR

BLOWING SNOW WITH STRONG WINDS AND EXTREMELY POOR VISIBILITIES.

THIS CAN LEAD TO WHITEOUT CONDITIONS AND MAKE TRAVEL VERY

DANGEROUS.

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00z GFS Para a little wetter than the 00z GFS in my eyes, and a little to the SE with the colder temps. Very good for the DC area - 2/2.5 inches of liquid for the DC area and slightly more NW. Great run.

 

The 0z Euro, 06z NAM, 06z GFS, and other model runs all support a 20+ inch event for the DC area. 06z GFS is a little SE than the 0z GFS run, and gives DC a cushion in the cutoff line (a little colder than previous run as well).

 

06z GFS has snow reaching DC around 4pm on Friday.

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You gotta think Warnings no later than noon.

Sent from my iPhone using Tapatalk

IDK. seems like the start time keeps getting pushed later.  I thought it was 24 hours from start time for warning.  but perhaps the warning will remind the masses to get ready. 

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Again, it's gonna be hard for the models to nail down where any banding will show up. I think we have seen which model has been doing that all along and why each run different locations get pummeled

I am actually impressed how the models have handled the banding so far. They have basically bullseyed nova/dc/central md for days. Not saying they are right. But they have been incredibly insistent on the heaviest snow band location.

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QPF on NAM and GFS are well above 2" for us northerners, Euro was just under.

Not sure how much of a difference it will make in the end, whoever gets under the deform band jackpots

Can't complain about 2 inches qpf up here. Ratios should be fantastic up this way. Like you said the banding is the wild card and that stands a chane to make this storm beyond epic.
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QPF on NAM and GFS are well above 2" for us northerners, Euro was just under. 

 

Not sure how much of a difference it will make in the end, whoever gets under the deform band jackpots

 

Exactly.  on the order of ~2"+ liquid equivalent total overall for everyone, with deformation band snows on Saturday.  I think we all share in that, but whomever gets underneath those the most...look out.

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